#include "stm32l100c_discovery.h" GPIO_TypeDef* GPIO_PORT[LEDn] = {LED3_GPIO_PORT, LED4_GPIO_PORT}; const uint16_t GPIO_PIN[LEDn] = {LED3_PIN, LED4_PIN}; const uint32_t GPIO_CLK[LEDn] = {LED3_GPIO_CLK, LED4_GPIO_CLK}; GPIO_TypeDef* BUTTON_PORT[BUTTONn] = {USER_BUTTON_GPIO_PORT}; const uint16_t BUTTON_PIN[BUTTONn] = {USER_BUTTON_PIN}; const uint32_t BUTTON_CLK[BUTTONn] = {USER_BUTTON_GPIO_CLK}; const uint16_t BUTTON_EXTI_LINE[BUTTONn] = {USER_BUTTON_EXTI_LINE}; const uint16_t BUTTON_PORT_SOURCE[BUTTONn] = {USER_BUTTON_EXTI_PORT_SOURCE}; const uint16_t BUTTON_PIN_SOURCE[BUTTONn] = {USER_BUTTON_EXTI_PIN_SOURCE}; const uint16_t BUTTON_IRQn[BUTTONn] = {USER_BUTTON_EXTI_IRQn}; /** * @brief Configures LED GPIO. * @param Led: Specifies the Led to be configured. * This parameter can be one of following parameters: * @arg LED3 * @arg LED4 * @retval None */ void STM_EVAL_LEDInit(Led_TypeDef Led) { GPIO_InitTypeDef GPIO_InitStructure; /* Enable the GPIO_LED Clock */ RCC_AHBPeriphClockCmd(GPIO_CLK[Led], ENABLE); /* Configure the GPIO_LED pin */ GPIO_InitStructure.GPIO_Pin = GPIO_PIN[Led]; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz; GPIO_Init(GPIO_PORT[Led], &GPIO_InitStructure); } /** * @brief Turns selected LED On. * @param Led: Specifies the Led to be set on. * This parameter can be one of following parameters: * @arg LED3 * @arg LED4 * @retval None */ void STM_EVAL_LEDOn(Led_TypeDef Led) { GPIO_PORT[Led]->BSRRL = GPIO_PIN[Led]; } /** * @brief Turns selected LED Off. * @param Led: Specifies the Led to be set off. * This parameter can be one of following parameters: * @arg LED3 * @arg LED4 * @retval None */ void STM_EVAL_LEDOff(Led_TypeDef Led) { GPIO_PORT[Led]->BSRRH = GPIO_PIN[Led]; } /** * @brief Toggles the selected LED. * @param Led: Specifies the Led to be toggled. * This parameter can be one of following parameters: * @arg LED3 * @arg LED4 * @retval None */ void STM_EVAL_LEDToggle(Led_TypeDef Led) { GPIO_PORT[Led]->ODR ^= GPIO_PIN[Led]; } /** * @brief Configures Button GPIO and EXTI Line. * @param Button: Specifies the Button to be configured. * This parameter can be: * @arg BUTTON_USER: User Push Button * @param Button_Mode: Specifies Button mode. * This parameter can be one of following parameters: * @arg BUTTON_MODE_GPIO: Button will be used as simple IO * @arg BUTTON_MODE_EXTI: Button will be connected to EXTI line with interrupt * generation capability * @retval None */ void STM_EVAL_PBInit(Button_TypeDef Button, ButtonMode_TypeDef Button_Mode) { GPIO_InitTypeDef GPIO_InitStructure; EXTI_InitTypeDef EXTI_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; /* Enable the BUTTON Clock */ RCC_AHBPeriphClockCmd(BUTTON_CLK[Button], ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE); /* Configure Button pin as input */ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_InitStructure.GPIO_Pin = BUTTON_PIN[Button]; GPIO_Init(BUTTON_PORT[Button], &GPIO_InitStructure); if (Button_Mode == BUTTON_MODE_EXTI) { /* Connect Button EXTI Line to Button GPIO Pin */ SYSCFG_EXTILineConfig(BUTTON_PORT_SOURCE[Button], BUTTON_PIN_SOURCE[Button]); /* Configure Button EXTI line */ EXTI_InitStructure.EXTI_Line = BUTTON_EXTI_LINE[Button]; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; if (Button != BUTTON_USER) { EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; } else { EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; } EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); /* Enable and set Button EXTI Interrupt to the lowest priority */ NVIC_InitStructure.NVIC_IRQChannel = BUTTON_IRQn[Button]; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } } /** * @brief Returns the selected Button state. * @param Button: Specifies the Button to be checked. * This parameter can be one of following parameters: * @arg BUTTON_USER: User Push Button * @retval The Button GPIO pin value. */ uint32_t STM_EVAL_PBGetState(Button_TypeDef Button) { /* There is no Wakeup button on STM32f0-Discovery Kit */ return GPIO_ReadInputDataBit(BUTTON_PORT[Button], BUTTON_PIN[Button]); }