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196 | killagreg | 1 | /******************** (C) COPYRIGHT 2008 STMicroelectronics ******************** |
1 | ingob | 2 | * File Name : 91x_uart.c |
3 | * Author : MCD Application Team |
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196 | killagreg | 4 | * Version : V2.1 |
5 | * Date : 12/22/2008 |
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6 | * Description : This file provides all the UART firmware functions. |
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1 | ingob | 7 | ******************************************************************************** |
8 | * THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS |
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9 | * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. |
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10 | * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, |
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11 | * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE |
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12 | * CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING |
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13 | * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. |
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14 | *******************************************************************************/ |
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15 | |||
16 | /* Includes ------------------------------------------------------------------*/ |
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17 | #include "91x_uart.h" |
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18 | #include "91x_scu.h" |
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19 | |||
20 | /* Private typedef -----------------------------------------------------------*/ |
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21 | /* Private define ------------------------------------------------------------*/ |
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22 | /* UART IrDA Mask */ |
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23 | #define UART_IrDA_Disable_Mask 0xFFFD /* IrDA Disable Mask */ |
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24 | #define UART_IrDA_Enable_Mask 0x0002 /* IrDA Enable Mask */ |
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25 | #define IrDA_LowPower_Enable_Mask 0x0004 /*IrDA lower power mode enable*/ |
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26 | #define IrDA_LowPower_Disable_Mask 0xFFFB /*IrDA lower power mode enable*/ |
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27 | |||
28 | /* UART Mask */ |
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29 | #define UART_Enable_Mask 0x0001 /* UART Enable Mask */ |
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30 | #define UART_Disable_Mask 0xFFFE /* UART Disable Mask */ |
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31 | |||
32 | /* UART LoopBack */ |
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33 | #define UART_LoopBack_Disable_Mask 0xFF7F /* LoopBack Disable Mask */ |
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34 | #define UART_LoopBack_Enable_Mask 0x0080 /* LoopBack Enable Mask */ |
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35 | |||
36 | #define UART_WordLength_Mask 0xFF9F /* UART Word Length Mask */ |
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37 | #define UART_Parity_Mask 0xFF79 /* UART Parity Mask */ |
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38 | #define UART_HardwareFlowControl_Mask 0x3FFF /* UART Hardware Flow Control Mask */ |
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39 | #define UART_TxRxFIFOLevel_Mask 0xFFC0 /* UART Tx Rx FIFO Level Mask */ |
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40 | #define UART_BreakChar_Mask 0x0001 /* UART Break Character send Mask*/ |
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41 | #define UART_FLAG_Mask 0x1F /* UART Flag Mask */ |
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42 | #define UART_Mode_Mask 0xFCFF /* UART Mode Mask */ |
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43 | #define UART_RTS_LowLevel_Mask 0x0800 /* RTS signal is low */ |
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44 | #define UART_RTS_HighLevel_Mask 0xF7FF /* RTS signal is High */ |
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45 | #define UART_DTR_LowLevel_Mask 0x0400 /* DTR signal is low */ |
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46 | #define UART_DTR_HighLevel_Mask 0xFBFF /* DTR signal is High */ |
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47 | #define UART_ClearFlag_Mask 0xAA /* Clear Flag Mask */ |
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48 | |||
49 | /* Private macro -------------------------------------------------------------*/ |
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50 | /* Private variables ---------------------------------------------------------*/ |
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51 | /* Private function prototypes -----------------------------------------------*/ |
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52 | /* Private functions ---------------------------------------------------------*/ |
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53 | |||
54 | /******************************************************************************* |
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55 | * Function Name : UART_DeInit |
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56 | * Description : Deinitializes the UARTx peripheral registers |
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57 | * to their default reset values. |
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58 | * Input : UARTx: where x can be 0,1 or 2 to select the UART peripheral. |
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59 | * Output : None |
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60 | * Return : None |
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61 | *******************************************************************************/ |
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62 | void UART_DeInit(UART_TypeDef* UARTx) |
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63 | { |
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64 | /* Reset the UARTx registers values */ |
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65 | if(UARTx == UART0) |
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66 | { |
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67 | SCU_APBPeriphReset(__UART0,ENABLE); |
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68 | SCU_APBPeriphReset(__UART0,DISABLE); |
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69 | } |
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70 | else if(UARTx == UART1) |
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71 | { |
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72 | SCU_APBPeriphReset(__UART1,ENABLE); |
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73 | SCU_APBPeriphReset(__UART1,DISABLE); |
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74 | } |
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75 | else if(UARTx == UART2) |
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76 | { |
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77 | SCU_APBPeriphReset(__UART2,ENABLE); |
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78 | SCU_APBPeriphReset(__UART2,DISABLE); |
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79 | } |
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80 | } |
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81 | |||
82 | /******************************************************************************* |
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83 | * Function Name : UART_Init |
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84 | * Description : Initializes the UARTx peripheral according to the specified |
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85 | * parameters in the UART_InitStruct . |
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86 | * Input : - UARTx: where x can be 0,1or 2 to select the UART peripheral. |
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87 | * - UART_InitStruct: pointer to a UART_InitTypeDef structure |
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88 | * that contains the configuration information for the |
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89 | * specified UART peripheral. |
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90 | * Output : None |
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91 | * Return : None |
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92 | *******************************************************************************/ |
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93 | void UART_Init(UART_TypeDef* UARTx, UART_InitTypeDef* UART_InitStruct) |
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94 | { |
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95 | |||
96 | u64 UART_MainClock = 0; |
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97 | u32 IntegerDivider = 0; |
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98 | u32 FractionalDivider = 0; |
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99 | |||
100 | /* Clear the LCR[6:5] bits */ |
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101 | UARTx->LCR &= UART_WordLength_Mask; |
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102 | /* Set the LCR[6:5] bits according to UART_WordLength value */ |
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103 | UARTx->LCR |= UART_InitStruct->UART_WordLength; |
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104 | |||
105 | /* Choose Stop Bits */ |
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106 | if(UART_InitStruct->UART_StopBits == UART_StopBits_2) |
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107 | { |
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108 | /* 2 Stop Bit */ |
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109 | UARTx->LCR |= UART_StopBits_2; |
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110 | } |
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111 | else |
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112 | { |
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113 | /* One Stop Bits */ |
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114 | UARTx->LCR &= UART_StopBits_1; |
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115 | } |
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116 | |||
117 | /* Configure the Parity */ |
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118 | /* Clear the LCR[7]and LCR[2:1] bits */ |
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119 | UARTx->LCR &= UART_Parity_Mask; |
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120 | /* Set the LCR[7]and LCR[2:1] bits according to UART_Parity value */ |
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121 | UARTx->LCR |= UART_InitStruct->UART_Parity; |
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122 | |||
123 | /* Configure the BaudRate */ |
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124 | UART_MainClock = (SCU_GetMCLKFreqValue())*1000; |
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125 | if((SCU->CLKCNTR & 0x200) != 0x200) |
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126 | { |
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127 | UART_MainClock = UART_MainClock/2; |
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128 | } |
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129 | /* Determine the integer part */ |
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130 | IntegerDivider = ((100) * (UART_MainClock) / (16 * (UART_InitStruct->UART_BaudRate))); |
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131 | UARTx->IBRD = IntegerDivider / 100; |
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132 | |||
133 | /* Determine the fractional part */ |
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134 | FractionalDivider = IntegerDivider - (100 * (UARTx->IBRD)); |
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135 | UARTx->FBRD = ((((FractionalDivider * 64) + 50) / 100)); |
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136 | |||
137 | /* Choose the Hardware Flow Control */ |
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138 | /* Clear the CR[15:14] bits */ |
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139 | UARTx->CR &= UART_HardwareFlowControl_Mask; |
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140 | /* Set the CR[15:14] bits according to UART_HardwareFlowControl value */ |
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141 | UARTx->CR |= UART_InitStruct->UART_HardwareFlowControl; |
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142 | |||
143 | /* Configure the UART mode */ |
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144 | /* Clear the CR[9:8] bits */ |
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145 | UARTx->CR &= UART_Mode_Mask; |
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146 | /* Set the CR[9:8] bits according to UART_Mode value */ |
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147 | UARTx->CR |= UART_InitStruct->UART_Mode; |
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148 | |||
149 | /* Enable or disable the FIFOs */ |
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150 | /* Set the FIFOs Levels */ |
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151 | if(UART_InitStruct->UART_FIFO == UART_FIFO_Enable) |
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152 | { |
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153 | /* Enable the FIFOs */ |
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154 | UARTx->LCR |= UART_FIFO_Enable; |
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155 | |||
156 | /* Clear TXIFLSEL and RXIFLSEL bits */ |
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157 | UARTx->IFLS &= UART_TxRxFIFOLevel_Mask; |
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158 | |||
159 | /* Set RXIFLSEL bits according to UART_RxFIFOLevel value */ |
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160 | UARTx->IFLS |= (UART_InitStruct->UART_RxFIFOLevel << 3); |
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161 | |||
162 | /* Set TXIFLSEL bits according to UART_TxFIFOLevel value */ |
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163 | UARTx->IFLS |= UART_InitStruct->UART_TxFIFOLevel; |
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164 | } |
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165 | else |
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166 | { |
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167 | /* Disable the FIFOs */ |
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168 | UARTx->LCR &= UART_FIFO_Disable; |
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169 | } |
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170 | } |
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171 | |||
172 | /******************************************************************************* |
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173 | * Function Name : UART_StructInit |
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174 | * Description : Fills each UART_InitStruct member with its reset value. |
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175 | * Input : UART_InitStruct: pointer to a UART_InitTypeDef structure which |
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176 | * will be initialized. |
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177 | * Output : None |
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178 | * Return : None |
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179 | *******************************************************************************/ |
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180 | void UART_StructInit(UART_InitTypeDef* UART_InitStruct) |
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181 | { |
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182 | /* Reset the UART_InitStruct members */ |
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183 | UART_InitStruct->UART_WordLength = UART_WordLength_8D; |
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184 | UART_InitStruct->UART_StopBits = UART_StopBits_1; |
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185 | UART_InitStruct->UART_Parity = UART_Parity_Odd ; |
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186 | UART_InitStruct->UART_BaudRate = 9600; |
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187 | UART_InitStruct->UART_HardwareFlowControl = UART_HardwareFlowControl_None; |
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188 | UART_InitStruct->UART_Mode = UART_Mode_Tx_Rx; |
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189 | UART_InitStruct->UART_FIFO = UART_FIFO_Enable; |
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190 | UART_InitStruct->UART_TxFIFOLevel = UART_FIFOLevel_1_2; |
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191 | UART_InitStruct->UART_RxFIFOLevel = UART_FIFOLevel_1_2; |
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192 | } |
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193 | |||
194 | /******************************************************************************* |
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195 | * Function Name : UART_Cmd |
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196 | * Description : Enables or disables the specified UART peripheral. |
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197 | * Input : - UARTx: where x can be 0,1 or 2 to select the UART peripheral |
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198 | * - NewState: new state of the UARTx peripheral. |
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199 | * This parameter can be: ENABLE or DISABLE. |
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200 | * Output : None |
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201 | * Return : None |
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202 | *******************************************************************************/ |
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203 | void UART_Cmd(UART_TypeDef* UARTx, FunctionalState NewState) |
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204 | { |
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205 | if (NewState == ENABLE) |
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206 | { |
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207 | /* Enable the selected UART by setting the UARTEN bit in the CR register */ |
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208 | UARTx->CR |= UART_Enable_Mask; |
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209 | } |
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210 | else |
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211 | { |
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212 | /* Disable the selected UART by clearing the UARTEN bit in the CR register */ |
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213 | UARTx->CR &= UART_Disable_Mask; |
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214 | } |
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215 | } |
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216 | |||
217 | /******************************************************************************* |
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218 | * Function Name : UART_ITConfig |
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219 | * Description : Enables or disables the specified UART interrupts. |
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220 | * Input : - UARTx: where x can be 0,1 or 2 to select the UART peripheral |
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221 | * - UART_IT: specifies the UART interrupts sources to be |
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222 | * enabled or disabled. This parameter can be any combination |
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223 | * of the following values: |
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224 | * - UART_IT_OverrunError: Overrun Error interrupt |
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225 | * - UART_IT_BreakError: Break Error interrupt |
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226 | * - UART_IT_ParityError: Parity Error interrupt |
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227 | * - UART_IT_FrameError: Frame Error interrupt |
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228 | * - UART_IT_ReceiveTimeOut: Receive Time Out interrupt |
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229 | * - UART_IT_Transmit: Transmit interrupt |
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230 | * - UART_IT_Receive: Receive interrupt |
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231 | * - UART_IT_DSR: DSR interrupt |
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232 | * - UART_IT_DCD: DCD interrupt |
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233 | * - UART_IT_CTS: CTS interrupt |
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234 | * - UART_IT_RI: RI interrupt |
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235 | * - NewState: new state of the UARTx peripheral. |
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236 | * This parameter can be: ENABLE or DISABLE. |
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237 | * Output : None |
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238 | * Return : None |
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239 | *******************************************************************************/ |
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240 | void UART_ITConfig(UART_TypeDef* UARTx, u16 UART_IT, FunctionalState NewState) |
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241 | { |
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242 | if(NewState == ENABLE) |
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243 | { |
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244 | /* Enables the selected interrupts */ |
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245 | UARTx->IMSC |= UART_IT; |
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246 | } |
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247 | else |
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248 | { |
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249 | /* Disables the selected interrupts */ |
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250 | UARTx->IMSC &= ~UART_IT; |
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251 | } |
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252 | } |
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253 | |||
254 | /******************************************************************************* |
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255 | * Function Name : UART_DMAConfig |
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256 | * Description : Configures the UARTx’s DMA interface. |
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257 | * Input : - UARTx: where x can be 1 or 2 to select the UART peripheral |
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258 | * - UART_DMAOnError: specifies the DMA on error request. |
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259 | * This parameter can be: |
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260 | * - UART_DMAOnError_Enable: DMA receive request enabled |
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261 | * when the UART error interrupt is asserted. |
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262 | * - UART_DMAOnError_Disable: DMA receive request disabled |
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263 | * when the UART error interrupt is asserted. |
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264 | * Output : None |
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265 | * Return : None |
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266 | *******************************************************************************/ |
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267 | void UART_DMAConfig(UART_TypeDef* UARTx, u16 UART_DMAOnError) |
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268 | { |
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269 | if(UART_DMAOnError == UART_DMAOnError_Enable) |
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270 | { |
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271 | UARTx->DMACR &= UART_DMAOnError_Enable; |
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272 | } |
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273 | else |
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274 | { |
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275 | UARTx->DMACR |= UART_DMAOnError_Disable; |
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276 | } |
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277 | } |
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278 | |||
279 | /******************************************************************************* |
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280 | * Function Name : UART_DMACmd |
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281 | * Description : Enables or disables the UARTx’s DMA interface. |
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282 | * Input : - UARTx: where x can be 1 or 2 to select the UART peripheral |
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283 | * - UART_DMAReq: enables or disables the request of DMA from UART. |
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284 | * This parameter can be: |
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285 | * - UART_DMAReq_Tx: Transmit DMA Enable |
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286 | * - UART_DMAReq_Rx: Receive DMA Enable |
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287 | * - NewState: new state of the UARTx peripheral. |
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288 | * This parameter can be: ENABLE or DISABLE. |
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289 | * Output : None |
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290 | * Return : None |
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291 | *******************************************************************************/ |
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292 | void UART_DMACmd(UART_TypeDef* UARTx, u8 UART_DMAReq, FunctionalState NewState) |
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293 | { |
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294 | if(UART_DMAReq == UART_DMAReq_Tx) |
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295 | { |
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296 | if(NewState == ENABLE) |
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297 | { |
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298 | UARTx->DMACR |= UART_DMAReq_Tx; |
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299 | } |
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300 | else |
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301 | { |
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302 | UARTx->DMACR &= ~UART_DMAReq_Tx; |
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303 | } |
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304 | } |
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305 | |||
306 | if(UART_DMAReq == UART_DMAReq_Rx) |
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307 | { |
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308 | if(NewState == ENABLE) |
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309 | { |
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310 | UARTx->DMACR |= UART_DMAReq_Rx; |
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311 | } |
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312 | else |
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313 | { |
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314 | UARTx->DMACR &= ~UART_DMAReq_Rx; |
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315 | } |
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316 | } |
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317 | } |
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318 | |||
319 | /******************************************************************************* |
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320 | * Function Name : UART_LoopBackConfig |
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321 | * Description : Enables or disables the LoopBack mode. |
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322 | * Input : - UARTx: where x can be 0,1 or 2 to select the UART peripheral |
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323 | * - NewState: new state of the UARTx peripheral. |
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324 | * This parameter can be: ENABLE or DISABLE. |
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325 | * Output : None |
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326 | * Return : None |
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327 | *******************************************************************************/ |
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328 | void UART_LoopBackConfig(UART_TypeDef* UARTx, FunctionalState NewState) |
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329 | { |
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330 | if (NewState == ENABLE) |
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331 | { |
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332 | /* Enable the LoopBack mode of the specified UART */ |
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333 | UARTx->CR |= UART_LoopBack_Enable_Mask; |
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334 | } |
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335 | else |
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336 | { |
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337 | /* Disable the LoopBack mode of the specified UART */ |
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338 | UARTx->CR &= UART_LoopBack_Disable_Mask; |
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339 | } |
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340 | } |
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341 | |||
342 | /******************************************************************************* |
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343 | * Function Name : UART_GetFlagStatus |
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344 | * Description : Checks whether the specified UART flag is set or not. |
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345 | * Input : - UARTx: where x can be 0,1 or 2 to select the UART peripheral |
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346 | * - UART_FLAG: specifies the flag to check. |
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347 | * This parameter can be one of the following values: |
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348 | * - UART_FLAG_OverrunError: Overrun error flag |
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349 | * - UART_FLAG_Break: break error flag |
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350 | * - UART_FLAG_ParityError: parity error flag |
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351 | * - UART_FLAG_FrameError: frame error flag |
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352 | * - UART_FLAG_RI: RI flag |
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353 | * - UART_FLAG_TxFIFOEmpty: Transmit FIFO Empty flag |
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354 | * - UART_FLAG_RxFIFOFull: Receive FIFO Full flag |
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355 | * - UART_FLAG_TxFIFOFull: Transmit FIFO Full flag |
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356 | * - UART_FLAG_RxFIFOEmpty: Receive FIFO Empty flag |
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357 | * - UART_FLAG_Busy: UART Busy flag |
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358 | * - UART_FLAG_CTS: CTS flag |
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359 | * - UART_FLAG_DCD: DCD flag |
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360 | * - UART_FLAG_DSR: DSR flag |
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361 | * - UART_RawIT_OverrunError: Overrun Error interrupt flag |
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362 | * - UART_RawIT_BreakError: Break Error interrupt flag |
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363 | * - UART_RawIT_ParityError: Parity Error interrupt flag |
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364 | * - UART_RawIT_FrameError: Frame Error interrupt flag |
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365 | * - UART_RawIT_ReceiveTimeOut: ReceiveTimeOut interrupt flag |
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366 | * - UART_RawIT_Transmit: Transmit interrupt flag |
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367 | * - UART_RawIT_Receive: Receive interrupt flag |
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368 | * - UART_RawIT_DSR: DSR interrupt flag |
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369 | * - UART_RawIT_DCD: DCD interrupt flag |
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370 | * - UART_RawIT_CTS: CTS interrupt flag |
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371 | * - UART_RawIT_RI: RI interrupt flag |
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372 | * Output : None |
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373 | * Return : The new state of UART_FLAG (SET or RESET). |
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374 | *******************************************************************************/ |
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375 | FlagStatus UART_GetFlagStatus(UART_TypeDef* UARTx, u16 UART_FLAG) |
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376 | { |
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377 | |||
378 | u32 UARTReg = 0, FlagPos = 0; |
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379 | u32 StatusReg = 0; |
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380 | |||
381 | /* Get the UART register index */ |
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382 | UARTReg = UART_FLAG >> 5; |
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383 | |||
384 | /* Get the flag position */ |
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385 | FlagPos = UART_FLAG & UART_FLAG_Mask; |
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386 | |||
387 | if(UARTReg == 1) /* The flag to check is in RSR register */ |
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388 | { |
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389 | StatusReg = UARTx->RSECR; |
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390 | } |
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391 | else if (UARTReg == 2) /* The flag to check is in FR register */ |
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392 | { |
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393 | StatusReg = UARTx->FR; |
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394 | } |
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395 | else if(UARTReg == 3) /* The flag to check is in RIS register */ |
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396 | { |
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397 | StatusReg = UARTx->RIS; |
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398 | } |
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399 | |||
400 | if((StatusReg & (1 << FlagPos))!= RESET) |
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401 | { |
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402 | return SET; |
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403 | } |
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404 | else |
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405 | { |
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406 | return RESET; |
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407 | } |
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408 | } |
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409 | |||
410 | /******************************************************************************* |
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411 | * Function Name : UART_ClearFlag |
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412 | * Description : Clears the UARTx’s flags(Frame, Parity, Break, Overrun error). |
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413 | * Input : - UARTx: where x can be 0,1or 2 to select the UART peripheral. |
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414 | * Output : None |
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415 | * Return : None |
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416 | *******************************************************************************/ |
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417 | void UART_ClearFlag(UART_TypeDef* UARTx) |
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418 | { |
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419 | /* Clear the flag */ |
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420 | UARTx->RSECR = UART_ClearFlag_Mask; |
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421 | } |
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422 | |||
423 | /******************************************************************************* |
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424 | * Function Name : UART_GetITStatus |
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425 | * Description : Checks whether the specified UART interrupt has occured or not. |
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426 | * Input : - UARTx: where x can be 0,1or 2 to select the UART peripheral. |
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427 | * - UART_IT: specifies the interrupt pending bit to be checked. |
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428 | * This parameter can be one of the following values: |
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429 | * - UART_IT_OverrunError: Overrun Error interrupt |
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430 | * - UART_IT_BreakError: Break Error interrupt |
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431 | * - UART_IT_ParityError: Parity Error interrupt |
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432 | * - UART_IT_FrameError: Frame Error interrupt |
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433 | * - UART_IT_ReceiveTimeOut: Receive Time Out interrupt |
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434 | * - UART_IT_Transmit: Transmit interrupt |
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435 | * - UART_IT_Receive: Receive interrupt |
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436 | * - UART_IT_DSR: DSR interrupt |
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437 | * - UART_IT_DCD: DCD interrupt |
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438 | * - UART_IT_CTS: CTS interrupt |
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439 | * - UART_IT_RI: RI interrupt |
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440 | * Output : None |
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441 | * Return : The new state of UART_IT (SET or RESET). |
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442 | *******************************************************************************/ |
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443 | ITStatus UART_GetITStatus(UART_TypeDef* UARTx, u16 UART_IT) |
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444 | { |
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445 | if((UARTx->MIS & UART_IT) != RESET) |
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446 | { |
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447 | return SET; |
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448 | } |
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449 | else |
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450 | { |
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451 | return RESET; |
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452 | } |
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453 | } |
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454 | |||
455 | /******************************************************************************* |
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456 | * Function Name : UART_ClearITPendingBit |
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457 | * Description : Clears the UARTx’s interrupt pending bits. |
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458 | * Input : - UARTx: where x can be 0,1or 2 to select the UART peripheral. |
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459 | * - UART_IT: specifies the interrupt pending bit to clear. |
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460 | * More than one interrupt can be cleared using the “|” operator. |
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461 | * This parameter can be: |
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462 | * - UART_IT_OverrunError: Overrun Error interrupt |
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463 | * - UART_IT_BreakError: Break Error interrupt |
||
464 | * - UART_IT_ParityError: Parity Error interrupt |
||
465 | * - UART_IT_FrameError: Frame Error interrupt |
||
466 | * - UART_IT_ReceiveTimeOut: Receive Time Out interrupt |
||
467 | * - UART_IT_Transmit: Transmit interrupt |
||
468 | * - UART_IT_Receive: Receive interrupt |
||
469 | * - UART_IT_DSR: DSR interrupt |
||
470 | * - UART_IT_DCD: DCD interrupt |
||
471 | * - UART_IT_CTS: CTS interrupt |
||
472 | * - UART_IT_RI: RI interrupt |
||
473 | * Output : None |
||
474 | * Return : None |
||
475 | *******************************************************************************/ |
||
476 | void UART_ClearITPendingBit(UART_TypeDef* UARTx, u16 UART_IT) |
||
477 | { |
||
478 | /* Clear the specified interrupt */ |
||
479 | UARTx->ICR = UART_IT; |
||
480 | } |
||
481 | |||
482 | /******************************************************************************* |
||
483 | * Function Name : UART_IrDALowPowerConfig |
||
484 | * Description : Sets the IrDA low power mode |
||
485 | * Input : - IrDAx: where x can be 0,1 or 2 to select the UART/IrDA peripheral. |
||
486 | * - NewState: new state of the UARTIrDA peripheral. |
||
487 | * This parameter can be: ENABLE or DISABLE. |
||
488 | * Output : None |
||
489 | * Return : None |
||
490 | *******************************************************************************/ |
||
491 | void UART_IrDALowPowerConfig(u8 IrDAx, FunctionalState NewState) |
||
492 | { |
||
196 | killagreg | 493 | UART_TypeDef* UARTx =0; |
1 | ingob | 494 | |
495 | switch(IrDAx) |
||
496 | { |
||
497 | case IrDA0: UARTx = UART0; |
||
498 | break; |
||
499 | case IrDA1: UARTx = UART1; |
||
500 | break; |
||
501 | case IrDA2: UARTx = UART2; |
||
502 | break; |
||
196 | killagreg | 503 | default : break; |
1 | ingob | 504 | } |
505 | |||
506 | if (NewState == ENABLE) |
||
507 | { |
||
508 | UARTx->CR |= IrDA_LowPower_Enable_Mask; |
||
509 | } |
||
510 | else |
||
511 | { |
||
512 | UARTx->CR &= IrDA_LowPower_Disable_Mask; |
||
513 | } |
||
514 | } |
||
515 | |||
516 | /******************************************************************************* |
||
517 | * Function Name : UART_IrDASetCounter |
||
518 | * Description : Sets the IrDA counter divisor value. |
||
519 | * Input : - UARTx: where x can be 0,1 or 2 to select the UART/IrDA peripheral. |
||
520 | * - IrDA_Counter: IrDA counter divisor new value n low power mode(Hz). |
||
521 | * Output : None |
||
522 | * Return : None |
||
523 | *******************************************************************************/ |
||
524 | void UART_IrDASetCounter(u8 IrDAx, u32 IrDA_Counter) |
||
525 | { |
||
196 | killagreg | 526 | UART_TypeDef* UARTx =0; |
1 | ingob | 527 | u32 APBClock; |
528 | switch(IrDAx) |
||
529 | { |
||
530 | case IrDA0: UARTx = UART0; |
||
531 | break; |
||
532 | case IrDA1: UARTx = UART1; |
||
533 | break; |
||
534 | case IrDA2: UARTx = UART2; |
||
535 | break; |
||
196 | killagreg | 536 | default : break; |
1 | ingob | 537 | } |
538 | /* Get the APB frequency */ |
||
539 | APBClock = (SCU_GetPCLKFreqValue())*1000; |
||
540 | /* Determine the Counter Divisor part */ |
||
541 | UARTx->ILPR = (((APBClock*10) / ( IrDA_Counter)) + 5 )/10; |
||
542 | } |
||
543 | |||
544 | /******************************************************************************* |
||
545 | * Function Name : UART_IrDACmd |
||
546 | * Description : Enables or disables the UARTx’s IrDA interface. |
||
547 | * Input : - IrDAx: where x can be 0,1 or 2 to select the UART/IrDA peripheral |
||
548 | * - NewState: new state of the UARTx peripheral. |
||
549 | * This parameter can be: ENABLE or DISABLE. |
||
550 | * Output : None |
||
551 | * Return : None |
||
552 | *******************************************************************************/ |
||
553 | void UART_IrDACmd(u8 IrDAx, FunctionalState NewState) |
||
554 | { |
||
196 | killagreg | 555 | UART_TypeDef* UARTx = 0; |
1 | ingob | 556 | |
557 | switch(IrDAx) |
||
558 | { |
||
559 | case IrDA0: UARTx = UART0; |
||
560 | break; |
||
561 | case IrDA1: UARTx = UART1; |
||
562 | break; |
||
563 | case IrDA2: UARTx = UART2; |
||
564 | break; |
||
196 | killagreg | 565 | default : break; |
1 | ingob | 566 | } |
567 | if(NewState == ENABLE) |
||
568 | { |
||
569 | /* Enable the IrDA mode of the specified UART */ |
||
570 | UARTx->CR |= UART_IrDA_Enable_Mask; |
||
571 | } |
||
572 | else |
||
573 | { |
||
574 | /* Disable the IrDA mode of the specified UART */ |
||
575 | UARTx->CR &= UART_IrDA_Disable_Mask; |
||
576 | } |
||
577 | } |
||
578 | |||
579 | /******************************************************************************* |
||
580 | * Function Name : UART_SendData |
||
581 | * Description : Transmits signle Byte of data through the UARTx peripheral. |
||
582 | * Input : - UARTx: where x can be 0,1 or 2 to select the UART peripheral. |
||
583 | * - Data: the byte to transmit |
||
584 | * Output : None |
||
585 | * Return : None |
||
586 | *******************************************************************************/ |
||
587 | void UART_SendData(UART_TypeDef* UARTx, u8 Data) |
||
588 | { |
||
589 | /* Transmit one byte */ |
||
590 | UARTx->DR = Data; |
||
591 | } |
||
592 | |||
593 | /******************************************************************************* |
||
594 | * Function Name : UART_ReceiveData |
||
595 | * Description : Returns the most recent received Byte by the UARTx peripheral. |
||
596 | * Input : UARTx: where x can be 0,1 or 2 to select the UART peripheral. |
||
597 | * Output : None |
||
598 | * Return : The received data |
||
599 | *******************************************************************************/ |
||
600 | u8 UART_ReceiveData(UART_TypeDef* UARTx) |
||
601 | { |
||
602 | /* Receive one byte */ |
||
603 | return ((u8)UARTx->DR); |
||
604 | } |
||
605 | |||
606 | /******************************************************************************* |
||
607 | * Function Name : UART_SendBreak |
||
608 | * Description : Transmits break characters. |
||
609 | * Input : UARTx: where x can be 0,1 or 2 to select the UART peripheral. |
||
610 | * Output : None |
||
611 | * Return : None |
||
612 | *******************************************************************************/ |
||
613 | void UART_SendBreak(UART_TypeDef* UARTx) |
||
614 | { |
||
615 | /* Send break characters */ |
||
616 | UARTx->LCR |= UART_BreakChar_Mask; |
||
617 | } |
||
618 | |||
619 | /******************************************************************************* |
||
620 | * Function Name : UART_RTSConfig |
||
621 | * Description : Sets or Resets the RTS signal |
||
622 | * Input : - LevelState: new state of the RTS signal for UART0 only. |
||
623 | * This parameter can be: LowLevel or HighLevel |
||
624 | * Output : None |
||
625 | * Return : None |
||
626 | *******************************************************************************/ |
||
627 | void UART_RTSConfig(UART_LevelTypeDef LevelState) |
||
628 | { |
||
629 | if(LevelState == LowLevel) |
||
630 | { |
||
631 | UART0->CR |= UART_RTS_LowLevel_Mask; |
||
632 | } |
||
633 | else |
||
634 | { |
||
635 | UART0->CR &= UART_RTS_HighLevel_Mask; |
||
636 | } |
||
637 | } |
||
638 | |||
639 | /******************************************************************************* |
||
640 | * Function Name : UART_DTRConfig |
||
641 | * Description : Sets or Resets the DTR signal for UART0 only |
||
642 | * Input : - LevelState: new state of the DTR signal. |
||
643 | * This parameter can be: LowLevel or HighLevel |
||
644 | * Output : None |
||
645 | * Return : None |
||
646 | *******************************************************************************/ |
||
647 | void UART_DTRConfig(UART_LevelTypeDef LevelState) |
||
648 | { |
||
649 | if(LevelState == LowLevel) |
||
650 | { |
||
651 | UART0->CR |= UART_DTR_LowLevel_Mask; |
||
652 | } |
||
653 | else |
||
654 | { |
||
655 | UART0->CR &= UART_DTR_HighLevel_Mask; |
||
656 | } |
||
657 | } |
||
196 | killagreg | 658 | /******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/ |