2 ******************************************************************************
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3 * @file stm32l152_eval.c
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4 * @author MCD Application Team
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7 * @brief This file provides
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8 * - set of firmware functions to manage Leds, push-button and COM ports
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9 * - low level initialization functions for SD card (on SPI) and
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10 * temperature sensor (LM75)
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11 * available on STM32L152-EVAL evaluation board from STMicroelectronics.
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12 ******************************************************************************
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15 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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16 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
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17 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
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18 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
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19 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
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20 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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22 * <h2><center>© COPYRIGHT 2010 STMicroelectronics</center></h2>
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25 /* Includes ------------------------------------------------------------------*/
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26 #include "stm32l152_eval.h"
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27 #include "stm32l1xx_spi.h"
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28 #include "stm32l1xx_i2c.h"
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30 /** @addtogroup Utilities
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34 /** @addtogroup STM32_EVAL
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38 /** @addtogroup STM32L152_EVAL
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42 /** @defgroup STM32L152_EVAL_LOW_LEVEL
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43 * @brief This file provides firmware functions to manage Leds, push-buttons,
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44 * COM ports, SD card on SPI and temperature sensor (LM75) available on
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45 * STM32L152-EVAL evaluation board from STMicroelectronics.
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49 /** @defgroup STM32L152_EVAL_LOW_LEVEL_Private_TypesDefinitions
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57 /** @defgroup STM32L152_EVAL_LOW_LEVEL_Private_Defines
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65 /** @defgroup STM32L152_EVAL_LOW_LEVEL_Private_Macros
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73 /** @defgroup STM32L152_EVAL_LOW_LEVEL_Private_Variables
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76 GPIO_TypeDef* GPIO_PORT[LEDn] = {LED1_GPIO_PORT, LED2_GPIO_PORT, LED3_GPIO_PORT,
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78 const uint16_t GPIO_PIN[LEDn] = {LED1_PIN, LED2_PIN, LED3_PIN,
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80 const uint32_t GPIO_CLK[LEDn] = {LED1_GPIO_CLK, LED2_GPIO_CLK, LED3_GPIO_CLK,
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83 GPIO_TypeDef* BUTTON_PORT[BUTTONn] = {WAKEUP_BUTTON_GPIO_PORT, TAMPER_BUTTON_GPIO_PORT,
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84 KEY_BUTTON_GPIO_PORT, RIGHT_BUTTON_GPIO_PORT,
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85 LEFT_BUTTON_GPIO_PORT, UP_BUTTON_GPIO_PORT,
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86 DOWN_BUTTON_GPIO_PORT, SEL_BUTTON_GPIO_PORT};
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88 const uint16_t BUTTON_PIN[BUTTONn] = {WAKEUP_BUTTON_PIN, TAMPER_BUTTON_PIN,
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89 KEY_BUTTON_PIN, RIGHT_BUTTON_PIN,
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90 LEFT_BUTTON_PIN, UP_BUTTON_PIN,
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91 DOWN_BUTTON_PIN, SEL_BUTTON_PIN};
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93 const uint32_t BUTTON_CLK[BUTTONn] = {WAKEUP_BUTTON_GPIO_CLK, TAMPER_BUTTON_GPIO_CLK,
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94 KEY_BUTTON_GPIO_CLK, RIGHT_BUTTON_GPIO_CLK,
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95 LEFT_BUTTON_GPIO_CLK, UP_BUTTON_GPIO_CLK,
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96 DOWN_BUTTON_GPIO_CLK, SEL_BUTTON_GPIO_CLK};
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98 const uint16_t BUTTON_EXTI_LINE[BUTTONn] = {WAKEUP_BUTTON_EXTI_LINE,
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99 TAMPER_BUTTON_EXTI_LINE,
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100 KEY_BUTTON_EXTI_LINE,
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101 RIGHT_BUTTON_EXTI_LINE,
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102 LEFT_BUTTON_EXTI_LINE,
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103 UP_BUTTON_EXTI_LINE,
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104 DOWN_BUTTON_EXTI_LINE,
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105 SEL_BUTTON_EXTI_LINE};
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107 const uint16_t BUTTON_PORT_SOURCE[BUTTONn] = {WAKEUP_BUTTON_EXTI_PORT_SOURCE,
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108 TAMPER_BUTTON_EXTI_PORT_SOURCE,
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109 KEY_BUTTON_EXTI_PORT_SOURCE,
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110 RIGHT_BUTTON_EXTI_PORT_SOURCE,
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111 LEFT_BUTTON_EXTI_PORT_SOURCE,
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112 UP_BUTTON_EXTI_PORT_SOURCE,
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113 DOWN_BUTTON_EXTI_PORT_SOURCE,
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114 SEL_BUTTON_EXTI_PORT_SOURCE};
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116 const uint16_t BUTTON_PIN_SOURCE[BUTTONn] = {WAKEUP_BUTTON_EXTI_PIN_SOURCE,
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117 TAMPER_BUTTON_EXTI_PIN_SOURCE,
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118 KEY_BUTTON_EXTI_PIN_SOURCE,
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119 RIGHT_BUTTON_EXTI_PIN_SOURCE,
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120 LEFT_BUTTON_EXTI_PIN_SOURCE,
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121 UP_BUTTON_EXTI_PIN_SOURCE,
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122 DOWN_BUTTON_EXTI_PIN_SOURCE,
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123 SEL_BUTTON_EXTI_PIN_SOURCE};
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125 const uint16_t BUTTON_IRQn[BUTTONn] = {WAKEUP_BUTTON_EXTI_IRQn, TAMPER_BUTTON_EXTI_IRQn,
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126 KEY_BUTTON_EXTI_IRQn, RIGHT_BUTTON_EXTI_IRQn,
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127 LEFT_BUTTON_EXTI_IRQn, UP_BUTTON_EXTI_IRQn,
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128 DOWN_BUTTON_EXTI_IRQn, SEL_BUTTON_EXTI_IRQn};
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130 USART_TypeDef* COM_USART[COMn] = {EVAL_COM1, EVAL_COM2};
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132 GPIO_TypeDef* COM_TX_PORT[COMn] = {EVAL_COM1_TX_GPIO_PORT, EVAL_COM2_TX_GPIO_PORT};
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134 GPIO_TypeDef* COM_RX_PORT[COMn] = {EVAL_COM1_RX_GPIO_PORT, EVAL_COM2_RX_GPIO_PORT};
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136 const uint32_t COM_USART_CLK[COMn] = {EVAL_COM1_CLK, EVAL_COM2_CLK};
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138 const uint32_t COM_TX_PORT_CLK[COMn] = {EVAL_COM1_TX_GPIO_CLK, EVAL_COM2_TX_GPIO_CLK};
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140 const uint32_t COM_RX_PORT_CLK[COMn] = {EVAL_COM1_RX_GPIO_CLK, EVAL_COM2_RX_GPIO_CLK};
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142 const uint16_t COM_TX_PIN[COMn] = {EVAL_COM1_TX_PIN, EVAL_COM2_TX_PIN};
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144 const uint16_t COM_RX_PIN[COMn] = {EVAL_COM1_RX_PIN, EVAL_COM2_RX_PIN};
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146 const uint16_t COM_TX_PIN_SOURCE[COMn] = {EVAL_COM1_TX_SOURCE, EVAL_COM2_TX_SOURCE};
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148 const uint16_t COM_RX_PIN_SOURCE[COMn] = {EVAL_COM1_RX_SOURCE, EVAL_COM2_RX_SOURCE};
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150 const uint16_t COM_TX_AF[COMn] = {EVAL_COM1_TX_AF, EVAL_COM2_TX_AF};
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152 const uint16_t COM_RX_AF[COMn] = {EVAL_COM1_RX_AF, EVAL_COM2_RX_AF};
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159 /** @defgroup STM32L152_EVAL_LOW_LEVEL_Private_FunctionPrototypes
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167 /** @defgroup STM32L152_EVAL_LOW_LEVEL_Private_Functions
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172 * @brief Configures LED GPIO.
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173 * @param Led: Specifies the Led to be configured.
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174 * This parameter can be one of following parameters:
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181 void STM_EVAL_LEDInit(Led_TypeDef Led)
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183 GPIO_InitTypeDef GPIO_InitStructure;
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185 /* Enable the GPIO_LED Clock */
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186 RCC_AHBPeriphClockCmd(GPIO_CLK[Led], ENABLE);
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188 /* Configure the GPIO_LED pin */
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189 GPIO_InitStructure.GPIO_Pin = GPIO_PIN[Led];
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190 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
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191 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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192 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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193 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
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194 GPIO_Init(GPIO_PORT[Led], &GPIO_InitStructure);
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195 GPIO_PORT[Led]->BSRRL = GPIO_PIN[Led];
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199 * @brief Turns selected LED On.
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200 * @param Led: Specifies the Led to be set on.
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201 * This parameter can be one of following parameters:
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208 void STM_EVAL_LEDOn(Led_TypeDef Led)
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210 GPIO_PORT[Led]->BSRRH = GPIO_PIN[Led];
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214 * @brief Turns selected LED Off.
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215 * @param Led: Specifies the Led to be set off.
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216 * This parameter can be one of following parameters:
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223 void STM_EVAL_LEDOff(Led_TypeDef Led)
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225 GPIO_PORT[Led]->BSRRL = GPIO_PIN[Led];
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229 * @brief Toggles the selected LED.
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230 * @param Led: Specifies the Led to be toggled.
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231 * This parameter can be one of following parameters:
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238 void STM_EVAL_LEDToggle(Led_TypeDef Led)
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240 GPIO_PORT[Led]->ODR ^= GPIO_PIN[Led];
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244 * @brief Configures Button GPIO and EXTI Line.
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245 * @param Button: Specifies the Button to be configured.
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246 * This parameter can be one of following parameters:
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247 * @arg BUTTON_WAKEUP: Wakeup Push Button
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248 * @arg BUTTON_TAMPER: Tamper Push Button
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249 * @arg BUTTON_KEY: Key Push Button
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250 * @arg BUTTON_RIGHT: Joystick Right Push Button
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251 * @arg BUTTON_LEFT: Joystick Left Push Button
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252 * @arg BUTTON_UP: Joystick Up Push Button
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253 * @arg BUTTON_DOWN: Joystick Down Push Button
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254 * @arg BUTTON_SEL: Joystick Sel Push Button
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255 * @param Button_Mode: Specifies Button mode.
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256 * This parameter can be one of following parameters:
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257 * @arg BUTTON_MODE_GPIO: Button will be used as simple IO
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258 * @arg BUTTON_MODE_EXTI: Button will be connected to EXTI line with interrupt
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259 * generation capability
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262 void STM_EVAL_PBInit(Button_TypeDef Button, ButtonMode_TypeDef Button_Mode)
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264 GPIO_InitTypeDef GPIO_InitStructure;
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265 EXTI_InitTypeDef EXTI_InitStructure;
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266 NVIC_InitTypeDef NVIC_InitStructure;
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268 /* Enable the BUTTON Clock */
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269 RCC_AHBPeriphClockCmd(BUTTON_CLK[Button], ENABLE);
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270 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
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272 /* Configure Button pin as input */
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273 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
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274 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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275 GPIO_InitStructure.GPIO_Pin = BUTTON_PIN[Button];
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276 GPIO_Init(BUTTON_PORT[Button], &GPIO_InitStructure);
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279 if (Button_Mode == BUTTON_MODE_EXTI)
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281 /* Connect Button EXTI Line to Button GPIO Pin */
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282 SYSCFG_EXTILineConfig(BUTTON_PORT_SOURCE[Button], BUTTON_PIN_SOURCE[Button]);
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284 /* Configure Button EXTI line */
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285 EXTI_InitStructure.EXTI_Line = BUTTON_EXTI_LINE[Button];
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286 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
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288 if((Button != BUTTON_WAKEUP) && (Button != BUTTON_KEY) && (Button != BUTTON_TAMPER))
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290 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
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294 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
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296 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
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297 EXTI_Init(&EXTI_InitStructure);
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299 /* Enable and set Button EXTI Interrupt to the lowest priority */
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300 NVIC_InitStructure.NVIC_IRQChannel = BUTTON_IRQn[Button];
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301 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
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302 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
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303 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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305 NVIC_Init(&NVIC_InitStructure);
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310 * @brief Returns the selected Button state.
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311 * @param Button: Specifies the Button to be checked.
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312 * This parameter can be one of following parameters:
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313 * @arg BUTTON_WAKEUP: Wakeup Push Button
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314 * @arg BUTTON_TAMPER: Tamper Push Button
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315 * @arg BUTTON_KEY: Key Push Button
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316 * @arg BUTTON_RIGHT: Joystick Right Push Button
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317 * @arg BUTTON_LEFT: Joystick Left Push Button
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318 * @arg BUTTON_UP: Joystick Up Push Button
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319 * @arg BUTTON_DOWN: Joystick Down Push Button
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320 * @arg BUTTON_SEL: Joystick Sel Push Button
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321 * @retval The Button GPIO pin value.
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323 uint32_t STM_EVAL_PBGetState(Button_TypeDef Button)
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325 return GPIO_ReadInputDataBit(BUTTON_PORT[Button], BUTTON_PIN[Button]);
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330 * @brief Configures COM port.
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331 * @param COM: Specifies the COM port to be configured.
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332 * This parameter can be one of following parameters:
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335 * @param USART_InitStruct: pointer to a USART_InitTypeDef structure that
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336 * contains the configuration information for the specified USART peripheral.
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339 void STM_EVAL_COMInit(COM_TypeDef COM, USART_InitTypeDef* USART_InitStruct)
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341 GPIO_InitTypeDef GPIO_InitStructure;
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343 /* Enable GPIO clock */
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344 RCC_AHBPeriphClockCmd(COM_TX_PORT_CLK[COM] | COM_RX_PORT_CLK[COM], ENABLE);
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346 /* Enable UART clock */
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347 RCC_APB1PeriphClockCmd(COM_USART_CLK[COM], ENABLE);
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349 /* Connect PXx to USARTx_Tx*/
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350 GPIO_PinAFConfig(COM_TX_PORT[COM], COM_TX_PIN_SOURCE[COM], COM_TX_AF[COM]);
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352 /* Connect PXx to USARTx_Rx*/
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353 GPIO_PinAFConfig(COM_RX_PORT[COM], COM_RX_PIN_SOURCE[COM], COM_RX_AF[COM]);
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355 /* Configure USART Tx as alternate function push-pull */
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356 GPIO_InitStructure.GPIO_Pin = COM_TX_PIN[COM];
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357 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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358 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
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359 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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360 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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361 GPIO_Init(COM_TX_PORT[COM], &GPIO_InitStructure);
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363 /* Configure USART Rx as input floating */
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364 GPIO_InitStructure.GPIO_Pin = COM_RX_PIN[COM];
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365 GPIO_Init(COM_RX_PORT[COM], &GPIO_InitStructure);
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367 /* USART configuration */
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368 USART_Init(COM_USART[COM], USART_InitStruct);
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371 USART_Cmd(COM_USART[COM], ENABLE);
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375 * @brief DeInitializes the SPI interface.
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379 void SD_LowLevel_DeInit(void)
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381 GPIO_InitTypeDef GPIO_InitStructure;
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383 SPI_Cmd(SD_SPI, DISABLE); /*!< SD_SPI disable */
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384 SPI_DeInit(SD_SPI); /*!< DeInitializes the SD_SPI */
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386 /*!< SD_SPI Periph clock disable */
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387 RCC_APB1PeriphClockCmd(SD_SPI_CLK, DISABLE);
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389 /*!< Configure SD_SPI pins: SCK */
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390 GPIO_InitStructure.GPIO_Pin = SD_SPI_SCK_PIN;
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391 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
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392 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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393 GPIO_Init(SD_SPI_SCK_GPIO_PORT, &GPIO_InitStructure);
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395 /*!< Configure SD_SPI pins: MISO */
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396 GPIO_InitStructure.GPIO_Pin = SD_SPI_MISO_PIN;
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397 GPIO_Init(SD_SPI_MISO_GPIO_PORT, &GPIO_InitStructure);
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399 /*!< Configure SD_SPI pins: MOSI */
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400 GPIO_InitStructure.GPIO_Pin = SD_SPI_MOSI_PIN;
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401 GPIO_Init(SD_SPI_MOSI_GPIO_PORT, &GPIO_InitStructure);
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403 /*!< Configure SD_SPI_CS_PIN pin: SD Card CS pin */
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404 GPIO_InitStructure.GPIO_Pin = SD_CS_PIN;
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405 GPIO_Init(SD_CS_GPIO_PORT, &GPIO_InitStructure);
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407 /*!< Configure SD_SPI_DETECT_PIN pin: SD Card detect pin */
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408 GPIO_InitStructure.GPIO_Pin = SD_DETECT_PIN;
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409 GPIO_Init(SD_DETECT_GPIO_PORT, &GPIO_InitStructure);
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413 * @brief Initializes the SD Card and put it into StandBy State (Ready for
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418 void SD_LowLevel_Init(void)
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420 GPIO_InitTypeDef GPIO_InitStructure;
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421 SPI_InitTypeDef SPI_InitStructure;
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423 /*!< SD_SPI_CS_GPIO, SD_SPI_MOSI_GPIO, SD_SPI_MISO_GPIO, SD_SPI_DETECT_GPIO
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424 and SD_SPI_SCK_GPIO Periph clock enable */
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425 RCC_AHBPeriphClockCmd(SD_CS_GPIO_CLK | SD_SPI_MOSI_GPIO_CLK | SD_SPI_MISO_GPIO_CLK |
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426 SD_SPI_SCK_GPIO_CLK | SD_DETECT_GPIO_CLK, ENABLE);
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428 /*!< SD_SPI Periph clock enable */
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429 RCC_APB1PeriphClockCmd(SD_SPI_CLK, ENABLE);
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431 /*!< Configure SD_SPI pins: SCK */
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432 GPIO_InitStructure.GPIO_Pin = SD_SPI_SCK_PIN;
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433 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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434 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
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435 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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436 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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437 GPIO_Init(SD_SPI_SCK_GPIO_PORT, &GPIO_InitStructure);
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439 /*!< Configure SD_SPI pins: MISO */
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440 GPIO_InitStructure.GPIO_Pin = SD_SPI_MISO_PIN;
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441 GPIO_Init(SD_SPI_MISO_GPIO_PORT, &GPIO_InitStructure);
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443 /*!< Configure SD_SPI pins: MOSI */
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444 GPIO_InitStructure.GPIO_Pin = SD_SPI_MOSI_PIN;
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445 GPIO_Init(SD_SPI_MOSI_GPIO_PORT, &GPIO_InitStructure);
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447 /*!< Configure SD_SPI_CS_PIN pin: SD Card CS pin */
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448 GPIO_InitStructure.GPIO_Pin = SD_CS_PIN;
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449 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
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450 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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451 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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452 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
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453 GPIO_Init(SD_CS_GPIO_PORT, &GPIO_InitStructure);
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455 /*!< Configure SD_SPI_DETECT_PIN pin: SD Card detect pin */
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456 GPIO_InitStructure.GPIO_Pin = SD_DETECT_PIN;
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457 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
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458 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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459 GPIO_Init(SD_DETECT_GPIO_PORT, &GPIO_InitStructure);
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461 /* Connect PXx to SD_SPI_SCK */
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462 GPIO_PinAFConfig(SD_SPI_SCK_GPIO_PORT, SD_SPI_SCK_SOURCE, SD_SPI_SCK_AF);
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464 /* Connect PXx to SD_SPI_MISO */
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465 GPIO_PinAFConfig(SD_SPI_MISO_GPIO_PORT, SD_SPI_MISO_SOURCE, SD_SPI_MISO_AF);
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467 /* Connect PXx to SD_SPI_MOSI */
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468 GPIO_PinAFConfig(SD_SPI_MOSI_GPIO_PORT, SD_SPI_MOSI_SOURCE, SD_SPI_MOSI_AF);
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470 /*!< SD_SPI Config */
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471 SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
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472 SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
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473 SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
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474 SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
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475 SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
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476 SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
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477 SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
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479 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
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480 SPI_InitStructure.SPI_CRCPolynomial = 7;
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481 SPI_Init(SD_SPI, &SPI_InitStructure);
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483 SPI_Cmd(SD_SPI, ENABLE); /*!< SD_SPI enable */
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487 * @brief DeInitializes the LM75_I2C.
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491 void LM75_LowLevel_DeInit(void)
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493 GPIO_InitTypeDef GPIO_InitStructure;
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495 /*!< Disable LM75_I2C */
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496 I2C_Cmd(LM75_I2C, DISABLE);
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498 /*!< DeInitializes the LM75_I2C */
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499 I2C_DeInit(LM75_I2C);
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501 /*!< LM75_I2C Periph clock disable */
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502 RCC_APB1PeriphClockCmd(LM75_I2C_CLK, DISABLE);
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504 /*!< Configure LM75_I2C pins: SCL */
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505 GPIO_InitStructure.GPIO_Pin = LM75_I2C_SCL_PIN;
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506 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
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507 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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508 GPIO_Init(LM75_I2C_SCL_GPIO_PORT, &GPIO_InitStructure);
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510 /*!< Configure LM75_I2C pins: SDA */
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511 GPIO_InitStructure.GPIO_Pin = LM75_I2C_SDA_PIN;
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512 GPIO_Init(LM75_I2C_SDA_GPIO_PORT, &GPIO_InitStructure);
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514 /*!< Configure LM75_I2C pin: SMBUS ALERT */
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515 GPIO_InitStructure.GPIO_Pin = LM75_I2C_SMBUSALERT_PIN;
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516 GPIO_Init(LM75_I2C_SMBUSALERT_GPIO_PORT, &GPIO_InitStructure);
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520 * @brief Initializes the LM75_I2C.
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524 void LM75_LowLevel_Init(void)
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526 GPIO_InitTypeDef GPIO_InitStructure;
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528 /*!< LM75_I2C Periph clock enable */
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529 RCC_APB1PeriphClockCmd(LM75_I2C_CLK, ENABLE);
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531 /*!< LM75_I2C_SCL_GPIO_CLK, LM75_I2C_SDA_GPIO_CLK
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532 and LM75_I2C_SMBUSALERT_GPIO_CLK Periph clock enable */
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533 RCC_AHBPeriphClockCmd(LM75_I2C_SCL_GPIO_CLK | LM75_I2C_SDA_GPIO_CLK |
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534 LM75_I2C_SMBUSALERT_GPIO_CLK, ENABLE);
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536 /*!< Configure LM75_I2C pins: SCL */
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537 GPIO_InitStructure.GPIO_Pin = LM75_I2C_SCL_PIN;
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538 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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539 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
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540 GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
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541 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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542 GPIO_Init(LM75_I2C_SCL_GPIO_PORT, &GPIO_InitStructure);
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544 /*!< Configure LM75_I2C pins: SDA */
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545 GPIO_InitStructure.GPIO_Pin = LM75_I2C_SDA_PIN;
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546 GPIO_Init(LM75_I2C_SDA_GPIO_PORT, &GPIO_InitStructure);
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548 /*!< Configure LM75_I2C pin: SMBUS ALERT */
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549 GPIO_InitStructure.GPIO_Pin = LM75_I2C_SMBUSALERT_PIN;
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550 GPIO_Init(LM75_I2C_SMBUSALERT_GPIO_PORT, &GPIO_InitStructure);
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553 /* Connect PXx to I2C_SCL */
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554 GPIO_PinAFConfig(LM75_I2C_SCL_GPIO_PORT, LM75_I2C_SCL_SOURCE, LM75_I2C_SCL_AF);
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556 /* Connect PXx to I2C_SDA */
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557 GPIO_PinAFConfig(LM75_I2C_SDA_GPIO_PORT, LM75_I2C_SDA_SOURCE, LM75_I2C_SDA_AF);
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559 /* Connect PXx to I2C_SMBUSALER */
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560 GPIO_PinAFConfig(LM75_I2C_SMBUSALERT_GPIO_PORT, LM75_I2C_SMBUSALERT_SOURCE, LM75_I2C_SMBUSALERT_AF);
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584 /******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/
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