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196 | killagreg | 1 | /******************** (C) COPYRIGHT 2008 STMicroelectronics ******************** |
1 | ingob | 2 | * File Name : 91x_gpio.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 GPIO 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_gpio.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 | |||
23 | /* Private macro -------------------------------------------------------------*/ |
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24 | /* Private variables ---------------------------------------------------------*/ |
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25 | /* Private function prototypes -----------------------------------------------*/ |
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26 | static u8 GPIO_GetGPIONumber(GPIO_TypeDef* GPIOx); |
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27 | static u16 GPIO_GetAnaloClearBits(u8 GPIO_ANAChannel); |
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28 | |||
29 | /* Private functions ---------------------------------------------------------*/ |
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30 | |||
31 | /******************************************************************************* |
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32 | * Function Name : GPIO_DeInit |
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33 | * Description : Deinitializes the GPIOx peripheral registers to their default |
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34 | * reset values. |
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35 | * Input : GPIOx: where x can be (0..9) to select the GPIO peripheral. |
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36 | * Output : None |
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37 | * Return : None |
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38 | *******************************************************************************/ |
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39 | void GPIO_DeInit(GPIO_TypeDef* GPIOx) |
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40 | { |
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41 | /* Reset the GPIO registers values */ |
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42 | if(GPIOx == GPIO0) |
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43 | { |
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44 | SCU_APBPeriphReset(__GPIO0,ENABLE); |
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45 | SCU_APBPeriphReset(__GPIO0,DISABLE); |
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46 | SCU->GPIOTYPE[0x00] = 0x0000 ; |
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47 | SCU->GPIOOUT[0x00] = 0x0000; |
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48 | SCU->GPIOIN[0x00] = 0x0000; |
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49 | } |
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50 | |||
51 | if(GPIOx == GPIO1) |
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52 | { |
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53 | SCU_APBPeriphReset(__GPIO1,ENABLE); |
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54 | SCU_APBPeriphReset(__GPIO1,DISABLE); |
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55 | SCU->GPIOTYPE[0x01] = 0x0000 ; |
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56 | SCU->GPIOOUT[0x01] = 0x0000; |
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57 | SCU->GPIOIN[0x01] = 0x0000; |
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58 | } |
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59 | |||
60 | if(GPIOx == GPIO2) |
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61 | { |
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62 | SCU_APBPeriphReset(__GPIO2,ENABLE); |
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63 | SCU_APBPeriphReset(__GPIO2,DISABLE); |
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64 | SCU->GPIOTYPE[0x02] = 0x0000 ; |
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65 | SCU->GPIOOUT[0x02] = 0x0000; |
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66 | SCU->GPIOIN[0x02] = 0x0000; |
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67 | } |
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68 | |||
69 | if(GPIOx == GPIO3) |
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70 | { |
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71 | SCU_APBPeriphReset(__GPIO3,ENABLE); |
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72 | SCU_APBPeriphReset(__GPIO3,DISABLE); |
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73 | SCU->GPIOTYPE[0x03] = 0x0000 ; |
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74 | SCU->GPIOOUT[0x03] = 0x0000; |
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75 | SCU->GPIOIN[0x03] = 0x0000; |
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76 | } |
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77 | |||
78 | if(GPIOx == GPIO4) |
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79 | { |
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80 | SCU_APBPeriphReset(__GPIO4,ENABLE); |
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81 | SCU_APBPeriphReset(__GPIO4,DISABLE); |
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82 | SCU->GPIOTYPE[0x04] = 0x0000 ; |
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83 | SCU->GPIOOUT[0x04] = 0x0000; |
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84 | SCU->GPIOIN[0x04] = 0x0000; |
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85 | SCU->GPIOANA = 0x00; |
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86 | } |
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87 | |||
88 | if(GPIOx == GPIO5) |
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89 | { |
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90 | SCU_APBPeriphReset(__GPIO5,ENABLE); |
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91 | SCU_APBPeriphReset(__GPIO5,DISABLE); |
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92 | SCU->GPIOTYPE[0x05] = 0x0000 ; |
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93 | SCU->GPIOOUT[0x05] = 0x0000; |
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94 | SCU->GPIOIN[0x05] = 0x0000; |
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95 | } |
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96 | |||
97 | if(GPIOx == GPIO6) |
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98 | { |
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99 | SCU_APBPeriphReset(__GPIO6,ENABLE); |
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100 | SCU_APBPeriphReset(__GPIO6,DISABLE); |
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101 | SCU->GPIOTYPE[0x06] = 0x0000 ; |
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102 | SCU->GPIOOUT[0x06] = 0x0000; |
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103 | SCU->GPIOIN[0x06] = 0x0000; |
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104 | } |
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105 | |||
106 | if(GPIOx == GPIO7) |
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107 | { |
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108 | SCU_APBPeriphReset(__GPIO7,ENABLE); |
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109 | SCU_APBPeriphReset(__GPIO7,DISABLE); |
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110 | SCU->GPIOTYPE[0x07] = 0x0000; |
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111 | SCU->GPIOOUT[0x07] = 0x0000; |
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112 | SCU->GPIOIN[0x07] = 0x0000; |
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113 | } |
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114 | |||
115 | if(GPIOx == GPIO8) |
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116 | { |
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117 | SCU_APBPeriphReset(__GPIO8,ENABLE); |
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118 | SCU_APBPeriphReset(__GPIO8,DISABLE); |
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119 | SCU->GPIOTYPE[0x08] = 0x0000; |
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120 | SCU->GPIOEMI = 0x00; |
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121 | } |
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122 | |||
123 | if(GPIOx == GPIO9) |
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124 | { |
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125 | SCU_APBPeriphReset(__GPIO9,ENABLE); |
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126 | SCU_APBPeriphReset(__GPIO9,DISABLE); |
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127 | SCU->GPIOTYPE[0x09] = 0x0000; |
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128 | SCU->GPIOEMI = 0x00; |
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129 | } |
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130 | } |
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131 | /******************************************************************************* |
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132 | * Function Name : GPIO_Init |
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133 | * Description : Initializes the GPIOx peripheral according to the specified |
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134 | * parameters in the GPIO_InitStruct . |
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135 | * Input :- GPIOx: where x can be (0..9) to select the GPIO peripheral. |
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136 | * - GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that |
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137 | * contains the configuration information for the specified GPIO |
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138 | * peripheral. |
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139 | * Output : None |
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140 | * Return : None |
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141 | *******************************************************************************/ |
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142 | void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct) |
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143 | { |
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144 | /* Select pin direction */ |
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145 | u8 PinNumber = 0; |
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146 | u8 Counter = 0; |
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147 | u8 GPIO_Number = 0; |
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148 | |||
149 | GPIO_Number = GPIO_GetGPIONumber(GPIOx); |
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150 | |||
151 | if(GPIO_InitStruct->GPIO_Direction == GPIO_PinOutput) |
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152 | { |
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153 | GPIOx->DDR |= GPIO_InitStruct->GPIO_Pin; |
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154 | } |
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155 | else |
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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 | |||
160 | for (Counter = 0; Counter < 8;Counter++) |
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161 | { |
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162 | /*Search pin number*/ |
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163 | PinNumber = (GPIO_InitStruct->GPIO_Pin & (1 <<Counter)); |
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164 | if((PinNumber >> Counter) == 1) |
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165 | { |
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166 | if (GPIO_Number < 8) |
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167 | { |
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168 | /*Output ALternate 0*/ |
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169 | SCU->GPIOOUT[GPIO_Number] &= ~(0x3 <<(Counter *2)); |
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170 | if(GPIO_InitStruct->GPIO_Alternate == GPIO_OutputAlt1) |
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171 | { |
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172 | /*Output ALternate 1*/ |
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173 | SCU->GPIOOUT[GPIO_Number] |= 1 << (Counter *2); |
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174 | } |
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175 | if(GPIO_InitStruct->GPIO_Alternate == GPIO_OutputAlt2) |
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176 | { |
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177 | /*Output ALternate 2*/ |
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178 | SCU->GPIOOUT[GPIO_Number] |= 0x2 << (Counter *2); |
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179 | } |
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180 | if(GPIO_InitStruct->GPIO_Alternate == GPIO_OutputAlt3) |
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181 | { |
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182 | /*Output ALternate 3*/ |
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183 | SCU->GPIOOUT[GPIO_Number] |= 0x3 << (Counter *2); |
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184 | } |
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185 | |||
186 | /*IP Connected disable*/ |
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187 | SCU->GPIOIN[GPIO_Number] &= ~(0x1 << Counter) ; |
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196 | killagreg | 188 | if(GPIO_InitStruct->GPIO_IPInputConnected == GPIO_IPInputConnected_Enable) |
1 | ingob | 189 | { |
190 | /*IP Connected enable*/ |
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191 | SCU->GPIOIN[GPIO_Number] |= 0x1 << Counter; |
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192 | } |
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193 | } |
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194 | |||
195 | /*Type configuration: PushPull or Open Collector*/ |
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196 | SCU->GPIOTYPE[GPIO_Number] &= ~(0x1 << Counter) ; |
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197 | if(GPIO_InitStruct->GPIO_Type == GPIO_Type_OpenCollector) |
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198 | { |
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199 | /*Open Drain configuration*/ |
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200 | SCU->GPIOTYPE[GPIO_Number] |= 0x1 << Counter; |
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201 | } |
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202 | } |
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203 | } |
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204 | } |
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205 | |||
206 | /******************************************************************************* |
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207 | * Function Name : GPIO_StructInit |
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208 | * Description : Initialize the GPIO Init Structure parameters |
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209 | * Input : GPIO_InitStruct : pointer to a GPIO_InitTypeDef structure |
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210 | * which will be initialized. |
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211 | * Output : None |
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212 | * Return : None |
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213 | *******************************************************************************/ |
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214 | void GPIO_StructInit(GPIO_InitTypeDef* GPIO_InitStruct) |
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215 | { |
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216 | /* Reset GPIO init structure parameters values */ |
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217 | GPIO_InitStruct->GPIO_Pin = GPIO_Pin_All; |
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218 | GPIO_InitStruct->GPIO_Direction = GPIO_PinInput; |
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196 | killagreg | 219 | GPIO_InitStruct->GPIO_IPInputConnected = GPIO_IPInputConnected_Disable; |
1 | ingob | 220 | GPIO_InitStruct->GPIO_Alternate = GPIO_InputAlt1; |
221 | } |
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222 | |||
223 | /******************************************************************************* |
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224 | * Function Name : GPIO_ReadBit |
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225 | * Description : Reads the specified port pin |
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226 | * Input : - GPIOx: where x can be (0..9) to select the GPIO peripheral. |
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227 | * : - GPIO_Pin: the Pin number. This parameter can be GPIO_Pin_x |
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228 | * where x can be (0..7). |
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229 | * Output : None |
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230 | * Return : The port pin value |
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231 | *******************************************************************************/ |
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232 | u8 GPIO_ReadBit(GPIO_TypeDef* GPIOx, u8 GPIO_Pin) |
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233 | { |
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234 | if ((((GPIOx->DR[GPIO_Pin<<2])) & GPIO_Pin) != Bit_RESET ) |
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235 | { |
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236 | return Bit_SET; |
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237 | } |
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238 | else |
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239 | { |
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240 | return Bit_RESET; |
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241 | } |
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242 | } |
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243 | |||
244 | /******************************************************************************* |
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245 | * Function Name : GPIO_Read |
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246 | * Description : Reads the specified GPIO data port |
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247 | * Input : - GPIOx: where x can be (0..9) to select the GPIO peripheral. |
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248 | * Output : None |
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249 | * Return : GPIO data port word value. |
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250 | *******************************************************************************/ |
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251 | u8 GPIO_Read(GPIO_TypeDef* GPIOx) |
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252 | { |
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253 | return (GPIOx->DR[0x3FC]); |
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254 | } |
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255 | |||
256 | /******************************************************************************* |
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257 | * Function Name : GPIO_WriteBit |
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258 | * Description : Sets or clears the selected data port bit. |
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259 | * Input : - GPIOx: where x can be (0..9) to select the GPIO peripheral. |
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260 | * - GPIO_Pin: the Pin number. This parameter can be GPIO_Pin_x |
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261 | * where x can be (0..7). |
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262 | * - BitVal: this parameter specifies the value to be written |
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263 | * to the selected bit. |
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264 | * BitVal must be one of the BitAction enum values: |
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265 | * - Bit_RESET: to clear the port pin |
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266 | * - Bit_SET: to set the port pin |
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267 | * Output : None |
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268 | * Return : None |
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269 | *******************************************************************************/ |
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270 | void GPIO_WriteBit(GPIO_TypeDef* GPIOx, u8 GPIO_Pin, BitAction BitVal) |
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271 | { |
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272 | if(BitVal == Bit_SET) |
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273 | { |
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274 | GPIOx->DR[GPIO_Pin <<2] = GPIO_Pin; |
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275 | } |
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276 | else |
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277 | { |
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278 | GPIOx->DR[GPIO_Pin <<2] = 0x00; |
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279 | } |
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280 | } |
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281 | |||
282 | /******************************************************************************* |
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283 | * Function Name : GPIO_Write |
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284 | * Description : Writes the passed value in the selected data GPIOx port |
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285 | * register. |
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286 | * Input :- GPIOx: where x can be (0..9) to select the GPIO peripheral. |
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287 | * - PortVal: the value to be written to the data port register. |
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288 | * Output : None |
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289 | * Return : None |
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290 | *******************************************************************************/ |
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291 | void GPIO_Write(GPIO_TypeDef* GPIOx, u8 PortVal) |
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292 | { |
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293 | GPIOx->DR[0x3FC] = PortVal; |
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294 | } |
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295 | |||
296 | /******************************************************************************* |
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297 | * Function Name : GPIO_EMIConfig |
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298 | * Description : Enables or disables GPIO 8 and 9 in EMI mode. |
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299 | * Input : - NewState: new state of the EMI. |
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300 | * This parameter can be: ENABLE or DISABLE. |
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301 | * Output : None |
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302 | * Return : None |
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303 | *******************************************************************************/ |
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304 | void GPIO_EMIConfig(FunctionalState NewState) |
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305 | { |
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306 | if(NewState == ENABLE) |
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307 | { |
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308 | SCU->GPIOEMI = 0x01; |
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309 | } |
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310 | else |
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311 | { |
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312 | SCU->GPIOEMI = 0x00; |
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313 | } |
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314 | } |
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315 | |||
316 | /******************************************************************************* |
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317 | * Function Name : GPIO_ANAPinConfig |
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318 | * Description : Enables or disables pins from GPIO 4 in Analogue mode. |
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319 | * Input :- GPIO_ANAChannel: selects the ADC channel pin. |
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320 | * This parameter can be one of the following values: |
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321 | * GPIO_ANAChannel0 |
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322 | * GPIO_ANAChannel1 |
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323 | * GPIO_ANAChannel2 |
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324 | * GPIO_ANAChannel3 |
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325 | * GPIO_ANAChannel4 |
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326 | * GPIO_ANAChannel5 |
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327 | * GPIO_ANAChannel6 |
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328 | * GPIO_ANAChannel7 |
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329 | * GPIO_ANAChannelALL |
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330 | * - NewState: new state of the port pin. |
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331 | * This parameter can be: ENABLE or DISABLE. |
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332 | * Output : None |
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333 | * Return : None |
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334 | *******************************************************************************/ |
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335 | void GPIO_ANAPinConfig(u8 GPIO_ANAChannel, FunctionalState NewState) |
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336 | { |
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337 | if(NewState == ENABLE) |
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338 | { |
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339 | SCU->GPIOOUT[4] &= GPIO_GetAnaloClearBits(GPIO_ANAChannel); |
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340 | SCU->GPIOIN[4] &= ~GPIO_ANAChannel; |
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341 | SCU->GPIOANA |= GPIO_ANAChannel; |
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342 | } |
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343 | else |
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344 | { |
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345 | SCU->GPIOANA &= ~GPIO_ANAChannel; |
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346 | } |
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347 | } |
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348 | |||
349 | /******************************************************************************* |
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350 | * Function Name : GPIO_GetGPIONumber |
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351 | * Description : searche the GPIO number. |
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352 | * Input : GPIOx: where x can be (0..9) to select the GPIO peripheral. |
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353 | * Output : None |
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354 | * Return : GPIO number |
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355 | *******************************************************************************/ |
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356 | u8 GPIO_GetGPIONumber(GPIO_TypeDef* GPIOx) |
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357 | { |
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358 | if(GPIOx == GPIO1) |
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359 | { |
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360 | return 1; |
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361 | } |
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362 | if(GPIOx == GPIO2) |
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363 | { |
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364 | return 2; |
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365 | } |
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366 | if(GPIOx == GPIO3) |
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367 | { |
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368 | return 3; |
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369 | } |
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370 | if(GPIOx == GPIO4) |
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371 | { |
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372 | return 4; |
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373 | } |
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374 | if(GPIOx == GPIO5) |
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375 | { |
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376 | return 5; |
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377 | } |
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378 | if(GPIOx == GPIO6) |
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379 | { |
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380 | return 6; |
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381 | } |
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382 | if(GPIOx == GPIO7) |
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383 | { |
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384 | return 7; |
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385 | } |
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386 | if(GPIOx == GPIO8) |
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387 | { |
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388 | return 8; |
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389 | } |
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390 | if(GPIOx == GPIO9) |
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391 | { |
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392 | return 9; |
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393 | } |
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394 | return 0; |
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395 | } |
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396 | /******************************************************************************* |
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397 | * Function Name : GPIO_GetAnaloClearBits |
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398 | * Description : Clear the corresponding bits in the SCU_OUT register. |
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399 | * Input : GPIO_ANAChannel: selects the ADC channel pin. |
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400 | * This parameter can be one of the following values: |
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401 | * GPIO_ANAChannel0 |
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402 | * GPIO_ANAChannel1 |
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403 | * GPIO_ANAChannel2 |
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404 | * GPIO_ANAChannel3 |
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405 | * GPIO_ANAChannel4 |
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406 | * GPIO_ANAChannel5 |
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407 | * GPIO_ANAChannel6 |
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408 | * GPIO_ANAChannel7 |
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409 | * GPIO_ANAChannelALL |
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410 | * Output : None |
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411 | * Return : reset value in SCU_OUT register |
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412 | *******************************************************************************/ |
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413 | u16 GPIO_GetAnaloClearBits(u8 GPIO_ANAChannel) |
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414 | { |
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415 | if(GPIO_ANAChannel == GPIO_ANAChannel0) |
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416 | { |
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417 | return 0xFFFC; |
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418 | } |
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419 | if(GPIO_ANAChannel == GPIO_ANAChannel1) |
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420 | { |
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421 | return 0xFFF3; |
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422 | } |
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423 | if(GPIO_ANAChannel == GPIO_ANAChannel2) |
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424 | { |
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425 | return 0xFFCF; |
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426 | } |
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427 | if(GPIO_ANAChannel == GPIO_ANAChannel3) |
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428 | { |
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429 | return 0xFF3F; |
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430 | } |
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431 | if(GPIO_ANAChannel == GPIO_ANAChannel4) |
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432 | { |
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433 | return 0xFCFF; |
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434 | } |
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435 | if(GPIO_ANAChannel == GPIO_ANAChannel5) |
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436 | { |
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437 | return 0xF3FF; |
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438 | } |
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439 | if(GPIO_ANAChannel == GPIO_ANAChannel6) |
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440 | { |
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441 | return 0xCFFF; |
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442 | } |
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443 | if(GPIO_ANAChannel == GPIO_ANAChannel7) |
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444 | { |
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445 | return 0x3FFF; |
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446 | } |
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447 | /*Default vaule: return GPIO_ANAChannelALL*/ |
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448 | return 0x0000; |
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449 | } |
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196 | killagreg | 450 | /******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/ |
1 | ingob | 451 |