223 lines
8.1 KiB
C
223 lines
8.1 KiB
C
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////////////////////////////////////////////////////////////////////////////////
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/// @file hal_exti.c
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/// @author AE TEAM
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/// @brief THIS FILE PROVIDES ALL THE EXTI FIRMWARE FUNCTIONS.
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////////////////////////////////////////////////////////////////////////////////
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/// @attention
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///
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/// THE EXISTING FIRMWARE IS ONLY FOR REFERENCE, WHICH IS DESIGNED TO PROVIDE
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/// CUSTOMERS WITH CODING INFORMATION ABOUT THEIR PRODUCTS SO THEY CAN SAVE
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/// TIME. THEREFORE, MINDMOTION SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT OR
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/// CONSEQUENTIAL DAMAGES ABOUT ANY CLAIMS ARISING OUT OF THE CONTENT OF SUCH
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/// HARDWARE AND/OR THE USE OF THE CODING INFORMATION CONTAINED HEREIN IN
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/// CONNECTION WITH PRODUCTS MADE BY CUSTOMERS.
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///
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/// <H2><CENTER>© COPYRIGHT MINDMOTION </CENTER></H2>
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////////////////////////////////////////////////////////////////////////////////
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// Define to prevent recursive inclusion
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#define _HAL_EXTI_C_
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// Files includes
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#include "hal_exti.h"
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup MM32_Hardware_Abstract_Layer
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup EXTI_HAL
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup EXTI_Exported_Functions
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Deinitializes the EXTI peripheral registers to their default reset
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/// values.
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/// @param None.
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/// @retval None.
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Deinitializes the EXTI registers to their default reset values.
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/// @param None.
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/// @retval None.
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/// @note MEM_MODE bits are not affected by APB reset.
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/// @note MEM_MODE bits took the value from the user option bytes.
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/// @note CFGR2 register is not affected by APB reset.
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/// @note CLABBB configuration bits are locked when set.
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/// @note To unlock the configuration, perform a system reset.
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////////////////////////////////////////////////////////////////////////////////
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void EXTI_DeInit(void)
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{
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u16 i;
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// Clear all
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exEXTI_LineDisable(~0x00000000);
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// rc_w1
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EXTI->PR = EXTI->PR;
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// Set EXTI_CFGR1 register to reset value without affecting MEM_MODE bits
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EXTI->CFGR &= EXTI_CFGR_MEMMODE;
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// Set EXTICRx registers to reset value
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for (i = 0; i < 4; i++) {
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EXTI->CR[i] = 0;
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Selects the GPIO pin used as EXTI Line.
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/// @param port_source_gpio: selects the GPIO port to be used as source for EXTI lines .
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/// @param pin_source: specifies the EXTI line to be configured.
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/// @note This parameter can be pin_source where x can be:
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/// For MCU: (0..15) for GPIOA, GPIOB, (13..15) for GPIOC and (0..1, 6..7) for GPIOD.
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/// @retval None.
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////////////////////////////////////////////////////////////////////////////////
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void EXTI_LineConfig(u8 port_source_gpio, u8 pin_source)
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{
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EXTI->CR[pin_source >> 0x02] &= ~(0x0F << (0x04 * (pin_source & 0x03)));
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EXTI->CR[pin_source >> 0x02] |= ((port_source_gpio) << (0x04 * (pin_source & 0x03)));
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Initializes the EXTI peripheral according to the specified
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/// parameters in the init_struct.
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/// @param init_struct: pointer to a EXTI_InitTypeDef structure that
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/// contains the configuration information for the EXTI peripheral.
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/// @retval None.
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////////////////////////////////////////////////////////////////////////////////
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void EXTI_Init(EXTI_InitTypeDef* init_struct)
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{
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if (init_struct->EXTI_LineCmd != DISABLE) {
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EXTI->IMR &= ~init_struct->EXTI_Line;
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EXTI->EMR &= ~init_struct->EXTI_Line;
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if (init_struct->EXTI_Mode == EXTI_Mode_Interrupt) {
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EXTI->IMR |= init_struct->EXTI_Line;
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}
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else {
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EXTI->EMR |= init_struct->EXTI_Line;
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}
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EXTI->RTSR &= ~init_struct->EXTI_Line;
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EXTI->FTSR &= ~init_struct->EXTI_Line;
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if (init_struct->EXTI_Trigger == EXTI_Trigger_Rising_Falling) {
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EXTI->RTSR |= init_struct->EXTI_Line;
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EXTI->FTSR |= init_struct->EXTI_Line; // Rising and Faling afio
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}
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else if (init_struct->EXTI_Trigger == EXTI_Trigger_Rising) {
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EXTI->RTSR |= init_struct->EXTI_Line;
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}
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else {
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EXTI->FTSR |= init_struct->EXTI_Line;
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}
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}
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else {
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if (init_struct->EXTI_Mode == EXTI_Mode_Interrupt) {
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EXTI->IMR &= ~init_struct->EXTI_Line;
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}
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else {
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EXTI->EMR &= ~init_struct->EXTI_Line;
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Fills each init_struct member with its reset value.
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/// @param init_struct: pointer to a EXTI_InitTypeDef structure which will
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/// be initialized.
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/// @retval None.
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////////////////////////////////////////////////////////////////////////////////
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void EXTI_StructInit(EXTI_InitTypeDef* init_struct)
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{
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init_struct->EXTI_Line = EXTI_LineNone;
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init_struct->EXTI_Mode = EXTI_Mode_Interrupt;
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init_struct->EXTI_Trigger = EXTI_Trigger_Falling;
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init_struct->EXTI_LineCmd = DISABLE;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Generates a Software interrupt on selected EXTI line.
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/// @param line: specifies the EXTI line on which the software interrupt
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/// will be generated.
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/// @retval None.
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////////////////////////////////////////////////////////////////////////////////
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void EXTI_GenerateSWInterrupt(u32 line)
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{
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EXTI->SWIER |= line;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Checks whether the specified EXTI line flag is set or not.
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/// @param line: specifies the EXTI line flag to check.
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/// @retval The new state of line (SET or RESET).
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////////////////////////////////////////////////////////////////////////////////
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FlagStatus EXTI_GetFlagStatus(u32 line)
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{
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return (EXTI->PR & line) ? SET : RESET;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Clears the EXTI's line pending flags.
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/// @param line: specifies the EXTI lines flags to clear.
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/// @retval None.
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////////////////////////////////////////////////////////////////////////////////
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void EXTI_ClearFlag(u32 line)
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{
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EXTI->PR = line;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Checks whether the specified EXTI line is asserted or not.
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/// @param line: specifies the EXTI line to check.
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/// @retval The new state of line (SET or RESET).
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////////////////////////////////////////////////////////////////////////////////
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ITStatus EXTI_GetITStatus(u32 line)
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{
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return ((EXTI->PR & line) && (EXTI->IMR & line)) ? SET : RESET;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Clears the EXTI's line pending bits.
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/// @param line: specifies the EXTI lines to clear.
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/// @retval None.
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////////////////////////////////////////////////////////////////////////////////
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void EXTI_ClearITPendingBit(u32 line)
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{
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EXTI->PR = line;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief EXTI Line Disable
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/// @param line: specifies the EXTI lines to clear.
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/// @retval None.
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////////////////////////////////////////////////////////////////////////////////
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void exEXTI_LineDisable(u32 line)
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{
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EXTI->IMR &= ~line;
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EXTI->EMR &= ~line;
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EXTI->RTSR &= ~line;
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EXTI->FTSR &= ~line;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Clears the EXTI's line all pending bits.
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/// @param None.
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/// @retval None.
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////////////////////////////////////////////////////////////////////////////////
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u32 exEXTI_GetAllFlagStatus(void)
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{
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return EXTI->PR;
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}
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/// @}
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/// @}
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/// @}
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