95 lines
2.2 KiB
C
95 lines
2.2 KiB
C
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/*
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* stm32f4_uart.c
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*
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* Created on: Jul 24, 2016
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* Author: tkl
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*/
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#include <stddef.h>
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#include <stdint.h>
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#include "stm32f4xx.h"
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#include "stm32f4xx_isr.h"
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#include "stm32f4_uart.h"
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#include "gpio.h"
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#include "stm32f4_gpio.h"
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struct stm32f4_uart_obj {
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const void *callback; //!< Interrupt callback.
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const void *parameter; //!< argument for the callback.
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};
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static volatile struct stm32f4_uart_obj uart1_obj;
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int stm32f4_uart_open(const void *this)
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{
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if(NULL == this)
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return -1;
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struct stm32f4_uart *uart = (struct stm32f4_uart *)this;
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/* init gpio */
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stm32f4_gpio_open(uart->uart_gpio);
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/* uart clock enable */
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if(uart->uart_handle->Instance == USART1)
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__HAL_RCC_USART1_CLK_ENABLE();
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else if(uart->uart_handle->Instance == USART2)
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__HAL_RCC_USART2_CLK_ENABLE();
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else if(uart->uart_handle->Instance == USART3)
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__HAL_RCC_USART3_CLK_ENABLE();
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else if(uart->uart_handle->Instance == USART6)
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__HAL_RCC_USART6_CLK_ENABLE();
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/* init uart */
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HAL_UART_Init((UART_HandleTypeDef *)uart->uart_handle);
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return (0);
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}
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int stm32f4_uart_close(const void *this)
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{
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if(NULL == this)
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return -1;
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struct stm32f4_uart *uart = (struct stm32f4_uart *)this;
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HAL_UART_DeInit((UART_HandleTypeDef *)uart->uart_handle);
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if(uart->uart_handle->Instance == USART1)
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__HAL_RCC_USART1_CLK_DISABLE();
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else if(uart->uart_handle->Instance == USART2)
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__HAL_RCC_USART2_CLK_DISABLE();
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else if(uart->uart_handle->Instance == USART3)
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__HAL_RCC_USART3_CLK_DISABLE();
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else if(uart->uart_handle->Instance == USART6)
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__HAL_RCC_USART6_CLK_DISABLE();
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stm32f4_gpio_close(uart->uart_gpio);
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return (0);
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}
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int stm32f4_uart_read(const void *this, char *buffer, int len)
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{
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return (1);
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}
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int stm32f4_uart_write(const void *this, const char *buffer, int len)
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{
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if(NULL == this)
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return -1;
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struct stm32f4_uart *uart = (struct stm32f4_uart *)this;
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HAL_UART_Transmit((UART_HandleTypeDef *)uart->uart_handle, (uint8_t *)buffer, len, 1000);
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return len;
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}
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int stm32f4_uart_set_cb(const void *this, const void *callback, const void *param)
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{
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return (0);
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}
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// this is the interrupt request handler (IRQ) for ALL USART1 interrupts
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void USART1_IRQHandler(void)
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{
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enter_isr();
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// check if the USART1 receive interrupt flag was set
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exit_isr();
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}
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