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1 | ingob | 1 | /******************** (C) COPYRIGHT 2006 STMicroelectronics ******************** |
2 | * File Name : 91x_gpio.c |
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3 | * Author : MCD Application Team |
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4 | * Date First Issued : 05/18/2006 : Version 1.0 |
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5 | * Description : This file provides all the GPIO software functions. |
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6 | ******************************************************************************** |
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7 | * History: |
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8 | * 05/22/2007 : Version 1.2 |
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9 | * 05/24/2006 : Version 1.1 |
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10 | * 05/18/2006 : Version 1.0 |
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11 | ******************************************************************************** |
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12 | * THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS |
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13 | * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. |
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14 | * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, |
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15 | * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE |
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16 | * CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING |
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17 | * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. |
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18 | *******************************************************************************/ |
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19 | |||
20 | /* Includes ------------------------------------------------------------------*/ |
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21 | #include "91x_gpio.h" |
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22 | #include "91x_scu.h" |
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23 | |||
24 | /* Private typedef -----------------------------------------------------------*/ |
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25 | /* Private define ------------------------------------------------------------*/ |
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26 | |||
27 | /* Private macro -------------------------------------------------------------*/ |
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28 | /* Private variables ---------------------------------------------------------*/ |
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29 | /* Private function prototypes -----------------------------------------------*/ |
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30 | static u8 GPIO_GetGPIONumber(GPIO_TypeDef* GPIOx); |
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31 | static u16 GPIO_GetAnaloClearBits(u8 GPIO_ANAChannel); |
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32 | |||
33 | /* Private functions ---------------------------------------------------------*/ |
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34 | |||
35 | /******************************************************************************* |
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36 | * Function Name : GPIO_DeInit |
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37 | * Description : Deinitializes the GPIOx peripheral registers to their default |
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38 | * reset values. |
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39 | * Input : GPIOx: where x can be (0..9) to select the GPIO peripheral. |
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40 | * Output : None |
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41 | * Return : None |
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42 | *******************************************************************************/ |
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43 | void GPIO_DeInit(GPIO_TypeDef* GPIOx) |
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44 | { |
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45 | /* Reset the GPIO registers values */ |
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46 | if(GPIOx == GPIO0) |
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47 | { |
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48 | SCU_APBPeriphReset(__GPIO0,ENABLE); |
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49 | SCU_APBPeriphReset(__GPIO0,DISABLE); |
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50 | SCU->GPIOTYPE[0x00] = 0x0000 ; |
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51 | SCU->GPIOOUT[0x00] = 0x0000; |
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52 | SCU->GPIOIN[0x00] = 0x0000; |
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53 | } |
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54 | |||
55 | if(GPIOx == GPIO1) |
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56 | { |
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57 | SCU_APBPeriphReset(__GPIO1,ENABLE); |
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58 | SCU_APBPeriphReset(__GPIO1,DISABLE); |
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59 | SCU->GPIOTYPE[0x01] = 0x0000 ; |
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60 | SCU->GPIOOUT[0x01] = 0x0000; |
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61 | SCU->GPIOIN[0x01] = 0x0000; |
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62 | } |
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63 | |||
64 | if(GPIOx == GPIO2) |
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65 | { |
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66 | SCU_APBPeriphReset(__GPIO2,ENABLE); |
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67 | SCU_APBPeriphReset(__GPIO2,DISABLE); |
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68 | SCU->GPIOTYPE[0x02] = 0x0000 ; |
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69 | SCU->GPIOOUT[0x02] = 0x0000; |
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70 | SCU->GPIOIN[0x02] = 0x0000; |
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71 | } |
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72 | |||
73 | if(GPIOx == GPIO3) |
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74 | { |
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75 | SCU_APBPeriphReset(__GPIO3,ENABLE); |
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76 | SCU_APBPeriphReset(__GPIO3,DISABLE); |
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77 | SCU->GPIOTYPE[0x03] = 0x0000 ; |
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78 | SCU->GPIOOUT[0x03] = 0x0000; |
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79 | SCU->GPIOIN[0x03] = 0x0000; |
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80 | } |
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81 | |||
82 | if(GPIOx == GPIO4) |
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83 | { |
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84 | SCU_APBPeriphReset(__GPIO4,ENABLE); |
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85 | SCU_APBPeriphReset(__GPIO4,DISABLE); |
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86 | SCU->GPIOTYPE[0x04] = 0x0000 ; |
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87 | SCU->GPIOOUT[0x04] = 0x0000; |
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88 | SCU->GPIOIN[0x04] = 0x0000; |
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89 | SCU->GPIOANA = 0x00; |
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90 | } |
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91 | |||
92 | if(GPIOx == GPIO5) |
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93 | { |
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94 | SCU_APBPeriphReset(__GPIO5,ENABLE); |
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95 | SCU_APBPeriphReset(__GPIO5,DISABLE); |
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96 | SCU->GPIOTYPE[0x05] = 0x0000 ; |
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97 | SCU->GPIOOUT[0x05] = 0x0000; |
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98 | SCU->GPIOIN[0x05] = 0x0000; |
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99 | } |
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100 | |||
101 | if(GPIOx == GPIO6) |
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102 | { |
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103 | SCU_APBPeriphReset(__GPIO6,ENABLE); |
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104 | SCU_APBPeriphReset(__GPIO6,DISABLE); |
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105 | SCU->GPIOTYPE[0x06] = 0x0000 ; |
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106 | SCU->GPIOOUT[0x06] = 0x0000; |
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107 | SCU->GPIOIN[0x06] = 0x0000; |
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108 | } |
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109 | |||
110 | if(GPIOx == GPIO7) |
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111 | { |
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112 | SCU_APBPeriphReset(__GPIO7,ENABLE); |
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113 | SCU_APBPeriphReset(__GPIO7,DISABLE); |
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114 | SCU->GPIOTYPE[0x07] = 0x0000; |
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115 | SCU->GPIOOUT[0x07] = 0x0000; |
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116 | SCU->GPIOIN[0x07] = 0x0000; |
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117 | } |
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118 | |||
119 | if(GPIOx == GPIO8) |
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120 | { |
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121 | SCU_APBPeriphReset(__GPIO8,ENABLE); |
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122 | SCU_APBPeriphReset(__GPIO8,DISABLE); |
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123 | SCU->GPIOTYPE[0x08] = 0x0000; |
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124 | SCU->GPIOEMI = 0x00; |
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125 | } |
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126 | |||
127 | if(GPIOx == GPIO9) |
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128 | { |
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129 | SCU_APBPeriphReset(__GPIO9,ENABLE); |
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130 | SCU_APBPeriphReset(__GPIO9,DISABLE); |
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131 | SCU->GPIOTYPE[0x09] = 0x0000; |
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132 | SCU->GPIOEMI = 0x00; |
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133 | } |
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134 | } |
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135 | /******************************************************************************* |
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136 | * Function Name : GPIO_Init |
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137 | * Description : Initializes the GPIOx peripheral according to the specified |
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138 | * parameters in the GPIO_InitStruct . |
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139 | * Input :- GPIOx: where x can be (0..9) to select the GPIO peripheral. |
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140 | * - GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that |
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141 | * contains the configuration information for the specified GPIO |
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142 | * peripheral. |
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143 | * Output : None |
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144 | * Return : None |
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145 | *******************************************************************************/ |
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146 | void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct) |
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147 | { |
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148 | /* Select pin direction */ |
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149 | u8 PinNumber = 0; |
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150 | u8 Counter = 0; |
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151 | u8 GPIO_Number = 0; |
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152 | |||
153 | GPIO_Number = GPIO_GetGPIONumber(GPIOx); |
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154 | |||
155 | if(GPIO_InitStruct->GPIO_Direction == GPIO_PinOutput) |
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156 | { |
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157 | GPIOx->DDR |= GPIO_InitStruct->GPIO_Pin; |
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158 | } |
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159 | else |
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160 | { |
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161 | GPIOx->DDR &= ~GPIO_InitStruct->GPIO_Pin; |
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162 | } |
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163 | |||
164 | for (Counter = 0; Counter < 8;Counter++) |
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165 | { |
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166 | /*Search pin number*/ |
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167 | PinNumber = (GPIO_InitStruct->GPIO_Pin & (1 <<Counter)); |
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168 | if((PinNumber >> Counter) == 1) |
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169 | { |
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170 | if (GPIO_Number < 8) |
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171 | { |
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172 | /*Output ALternate 0*/ |
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173 | SCU->GPIOOUT[GPIO_Number] &= ~(0x3 <<(Counter *2)); |
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174 | if(GPIO_InitStruct->GPIO_Alternate == GPIO_OutputAlt1) |
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175 | { |
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176 | /*Output ALternate 1*/ |
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177 | SCU->GPIOOUT[GPIO_Number] |= 1 << (Counter *2); |
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178 | } |
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179 | if(GPIO_InitStruct->GPIO_Alternate == GPIO_OutputAlt2) |
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180 | { |
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181 | /*Output ALternate 2*/ |
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182 | SCU->GPIOOUT[GPIO_Number] |= 0x2 << (Counter *2); |
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183 | } |
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184 | if(GPIO_InitStruct->GPIO_Alternate == GPIO_OutputAlt3) |
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185 | { |
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186 | /*Output ALternate 3*/ |
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187 | SCU->GPIOOUT[GPIO_Number] |= 0x3 << (Counter *2); |
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188 | } |
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189 | |||
190 | /*IP Connected disable*/ |
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191 | SCU->GPIOIN[GPIO_Number] &= ~(0x1 << Counter) ; |
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192 | if(GPIO_InitStruct->GPIO_IPConnected == GPIO_IPConnected_Enable) |
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193 | { |
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194 | /*IP Connected enable*/ |
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195 | SCU->GPIOIN[GPIO_Number] |= 0x1 << Counter; |
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196 | } |
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197 | } |
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198 | |||
199 | /*Type configuration: PushPull or Open Collector*/ |
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200 | SCU->GPIOTYPE[GPIO_Number] &= ~(0x1 << Counter) ; |
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201 | if(GPIO_InitStruct->GPIO_Type == GPIO_Type_OpenCollector) |
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202 | { |
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203 | /*Open Drain configuration*/ |
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204 | SCU->GPIOTYPE[GPIO_Number] |= 0x1 << Counter; |
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205 | } |
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206 | } |
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207 | } |
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208 | } |
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209 | |||
210 | /******************************************************************************* |
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211 | * Function Name : GPIO_StructInit |
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212 | * Description : Initialize the GPIO Init Structure parameters |
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213 | * Input : GPIO_InitStruct : pointer to a GPIO_InitTypeDef structure |
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214 | * which will be initialized. |
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215 | * Output : None |
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216 | * Return : None |
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217 | *******************************************************************************/ |
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218 | void GPIO_StructInit(GPIO_InitTypeDef* GPIO_InitStruct) |
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219 | { |
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220 | /* Reset GPIO init structure parameters values */ |
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221 | GPIO_InitStruct->GPIO_Pin = GPIO_Pin_All; |
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222 | GPIO_InitStruct->GPIO_Direction = GPIO_PinInput; |
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223 | GPIO_InitStruct->GPIO_Type = GPIO_Type_PushPull; |
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224 | GPIO_InitStruct->GPIO_IPConnected = GPIO_IPConnected_Disable; |
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225 | GPIO_InitStruct->GPIO_Alternate = GPIO_InputAlt1; |
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226 | } |
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227 | |||
228 | /******************************************************************************* |
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229 | * Function Name : GPIO_ReadBit |
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230 | * Description : Reads the specified port pin |
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231 | * Input : - GPIOx: where x can be (0..9) to select the GPIO peripheral. |
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232 | * : - GPIO_Pin: the Pin number. This parameter can be GPIO_Pin_x |
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233 | * where x can be (0..7). |
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234 | * Output : None |
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235 | * Return : The port pin value |
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236 | *******************************************************************************/ |
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237 | u8 GPIO_ReadBit(GPIO_TypeDef* GPIOx, u8 GPIO_Pin) |
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238 | { |
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239 | if ((((GPIOx->DR[GPIO_Pin<<2])) & GPIO_Pin) != Bit_RESET ) |
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240 | { |
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241 | return Bit_SET; |
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242 | } |
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243 | else |
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244 | { |
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245 | return Bit_RESET; |
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246 | } |
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247 | } |
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248 | |||
249 | /******************************************************************************* |
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250 | * Function Name : GPIO_Read |
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251 | * Description : Reads the specified GPIO data port |
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252 | * Input : - GPIOx: where x can be (0..9) to select the GPIO peripheral. |
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253 | * Output : None |
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254 | * Return : GPIO data port word value. |
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255 | *******************************************************************************/ |
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256 | u8 GPIO_Read(GPIO_TypeDef* GPIOx) |
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257 | { |
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258 | return (GPIOx->DR[0x3FC]); |
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259 | } |
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260 | |||
261 | /******************************************************************************* |
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262 | * Function Name : GPIO_WriteBit |
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263 | * Description : Sets or clears the selected data port bit. |
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264 | * Input : - GPIOx: where x can be (0..9) to select the GPIO peripheral. |
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265 | * - GPIO_Pin: the Pin number. This parameter can be GPIO_Pin_x |
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266 | * where x can be (0..7). |
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267 | * - BitVal: this parameter specifies the value to be written |
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268 | * to the selected bit. |
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269 | * BitVal must be one of the BitAction enum values: |
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270 | * - Bit_RESET: to clear the port pin |
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271 | * - Bit_SET: to set the port pin |
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272 | * Output : None |
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273 | * Return : None |
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274 | *******************************************************************************/ |
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275 | void GPIO_WriteBit(GPIO_TypeDef* GPIOx, u8 GPIO_Pin, BitAction BitVal) |
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276 | { |
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277 | if(BitVal == Bit_SET) |
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278 | { |
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279 | GPIOx->DR[GPIO_Pin <<2] = GPIO_Pin; |
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280 | } |
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281 | else |
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282 | { |
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283 | GPIOx->DR[GPIO_Pin <<2] = 0x00; |
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284 | } |
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285 | } |
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286 | |||
287 | /******************************************************************************* |
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288 | * Function Name : GPIO_Write |
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289 | * Description : Writes the passed value in the selected data GPIOx port |
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290 | * register. |
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291 | * Input :- GPIOx: where x can be (0..9) to select the GPIO peripheral. |
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292 | * - PortVal: the value to be written to the data port register. |
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293 | * Output : None |
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294 | * Return : None |
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295 | *******************************************************************************/ |
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296 | void GPIO_Write(GPIO_TypeDef* GPIOx, u8 PortVal) |
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297 | { |
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298 | GPIOx->DR[0x3FC] = PortVal; |
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299 | } |
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300 | |||
301 | /******************************************************************************* |
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302 | * Function Name : GPIO_EMIConfig |
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303 | * Description : Enables or disables GPIO 8 and 9 in EMI mode. |
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304 | * Input : - NewState: new state of the EMI. |
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305 | * This parameter can be: ENABLE or DISABLE. |
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306 | * Output : None |
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307 | * Return : None |
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308 | *******************************************************************************/ |
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309 | void GPIO_EMIConfig(FunctionalState NewState) |
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310 | { |
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311 | if(NewState == ENABLE) |
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312 | { |
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313 | SCU->GPIOEMI = 0x01; |
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314 | } |
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315 | else |
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316 | { |
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317 | SCU->GPIOEMI = 0x00; |
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318 | } |
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319 | } |
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320 | |||
321 | /******************************************************************************* |
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322 | * Function Name : GPIO_ANAPinConfig |
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323 | * Description : Enables or disables pins from GPIO 4 in Analogue mode. |
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324 | * Input :- GPIO_ANAChannel: selects the ADC channel pin. |
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325 | * This parameter can be one of the following values: |
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326 | * GPIO_ANAChannel0 |
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327 | * GPIO_ANAChannel1 |
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328 | * GPIO_ANAChannel2 |
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329 | * GPIO_ANAChannel3 |
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330 | * GPIO_ANAChannel4 |
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331 | * GPIO_ANAChannel5 |
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332 | * GPIO_ANAChannel6 |
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333 | * GPIO_ANAChannel7 |
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334 | * GPIO_ANAChannelALL |
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335 | * - NewState: new state of the port pin. |
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336 | * This parameter can be: ENABLE or DISABLE. |
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337 | * Output : None |
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338 | * Return : None |
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339 | *******************************************************************************/ |
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340 | void GPIO_ANAPinConfig(u8 GPIO_ANAChannel, FunctionalState NewState) |
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341 | { |
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342 | if(NewState == ENABLE) |
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343 | { |
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344 | SCU->GPIOOUT[4] &= GPIO_GetAnaloClearBits(GPIO_ANAChannel); |
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345 | SCU->GPIOIN[4] &= ~GPIO_ANAChannel; |
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346 | SCU->GPIOANA |= GPIO_ANAChannel; |
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347 | } |
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348 | else |
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349 | { |
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350 | SCU->GPIOANA &= ~GPIO_ANAChannel; |
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351 | } |
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352 | } |
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353 | |||
354 | /******************************************************************************* |
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355 | * Function Name : GPIO_GetGPIONumber |
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356 | * Description : searche the GPIO number. |
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357 | * Input : GPIOx: where x can be (0..9) to select the GPIO peripheral. |
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358 | * Output : None |
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359 | * Return : GPIO number |
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360 | *******************************************************************************/ |
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361 | u8 GPIO_GetGPIONumber(GPIO_TypeDef* GPIOx) |
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362 | { |
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363 | if(GPIOx == GPIO1) |
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364 | { |
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365 | return 1; |
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366 | } |
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367 | if(GPIOx == GPIO2) |
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368 | { |
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369 | return 2; |
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370 | } |
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371 | if(GPIOx == GPIO3) |
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372 | { |
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373 | return 3; |
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374 | } |
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375 | if(GPIOx == GPIO4) |
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376 | { |
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377 | return 4; |
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378 | } |
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379 | if(GPIOx == GPIO5) |
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380 | { |
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381 | return 5; |
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382 | } |
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383 | if(GPIOx == GPIO6) |
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384 | { |
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385 | return 6; |
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386 | } |
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387 | if(GPIOx == GPIO7) |
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388 | { |
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389 | return 7; |
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390 | } |
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391 | if(GPIOx == GPIO8) |
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392 | { |
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393 | return 8; |
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394 | } |
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395 | if(GPIOx == GPIO9) |
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396 | { |
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397 | return 9; |
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398 | } |
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399 | return 0; |
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400 | } |
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401 | /******************************************************************************* |
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402 | * Function Name : GPIO_GetAnaloClearBits |
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403 | * Description : Clear the corresponding bits in the SCU_OUT register. |
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404 | * Input : GPIO_ANAChannel: selects the ADC channel pin. |
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405 | * This parameter can be one of the following values: |
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406 | * GPIO_ANAChannel0 |
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407 | * GPIO_ANAChannel1 |
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408 | * GPIO_ANAChannel2 |
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409 | * GPIO_ANAChannel3 |
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410 | * GPIO_ANAChannel4 |
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411 | * GPIO_ANAChannel5 |
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412 | * GPIO_ANAChannel6 |
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413 | * GPIO_ANAChannel7 |
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414 | * GPIO_ANAChannelALL |
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415 | * Output : None |
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416 | * Return : reset value in SCU_OUT register |
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417 | *******************************************************************************/ |
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418 | u16 GPIO_GetAnaloClearBits(u8 GPIO_ANAChannel) |
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419 | { |
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420 | if(GPIO_ANAChannel == GPIO_ANAChannel0) |
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421 | { |
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422 | return 0xFFFC; |
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423 | } |
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424 | if(GPIO_ANAChannel == GPIO_ANAChannel1) |
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425 | { |
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426 | return 0xFFF3; |
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427 | } |
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428 | if(GPIO_ANAChannel == GPIO_ANAChannel2) |
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429 | { |
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430 | return 0xFFCF; |
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431 | } |
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432 | if(GPIO_ANAChannel == GPIO_ANAChannel3) |
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433 | { |
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434 | return 0xFF3F; |
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435 | } |
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436 | if(GPIO_ANAChannel == GPIO_ANAChannel4) |
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437 | { |
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438 | return 0xFCFF; |
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439 | } |
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440 | if(GPIO_ANAChannel == GPIO_ANAChannel5) |
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441 | { |
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442 | return 0xF3FF; |
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443 | } |
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444 | if(GPIO_ANAChannel == GPIO_ANAChannel6) |
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445 | { |
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446 | return 0xCFFF; |
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447 | } |
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448 | if(GPIO_ANAChannel == GPIO_ANAChannel7) |
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449 | { |
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450 | return 0x3FFF; |
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451 | } |
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452 | /*Default vaule: return GPIO_ANAChannelALL*/ |
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453 | return 0x0000; |
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454 | } |
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455 | /******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/ |
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456 |