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add usart(rs485)

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This commit is contained in:
yelvlab
2024-12-30 22:59:49 +08:00
parent dbbeea4dc7
commit 88fc97d037
12 changed files with 97 additions and 69 deletions
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9
src/gd32e23x_it.c
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@@ -33,9 +33,6 @@ OF SUCH DAMAGE.
*/
#include "gd32e23x_it.h"
#include "main.h"
#include "systick.h"
#include "board_config.h"
/*!
\brief this function handles NMI exception
@@ -99,6 +96,12 @@ void SysTick_Handler(void)
{
}
/*!
\brief this function handles TIMER16 interrupt request
\param[in] none
\param[out] none
\retval none
*/
void TIMER16_IRQHandler(void)
{
if (timer_interrupt_flag_get(LED_BLINK_TIMER, TIMER_INT_FLAG_UP) == SET)

14
src/led.h
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@@ -1,14 +0,0 @@
//
// Created by yelv1 on 24-12-30.
//
#ifndef LED_H
#define LED_H
#include "gd32e23x_it.h"
#include "gd32e23x.h"
#include "board_config.h"
void led_blink_config(void);
#endif //LED_H

20
src/main.c
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@@ -5,12 +5,6 @@
\version 2024-02-22, V2.1.0, firmware for GD32E23x
*/
#include "main.h"
#include <stdio.h>
#include "gd32e23x.h"
#include "systick.h"
#include "gd32e23x_libopt.h"
#include "peripheral.h"
/*!
\brief main function
@@ -22,7 +16,9 @@ int main(void)
{
/* configure systick */
systick_config();
usart_config();
/* configure USART */
rs485_config();
/* configure LED */
led_blink_config();
delay_ms(5000);
@@ -35,12 +31,10 @@ int main(void)
}
/* retarget the C library printf function to the USART */
int _write (int fd, char *pBuffer, int size)
{
for (int i = 0; i < size; i++)
{
usart_data_transmit(USART0, (uint8_t)pBuffer[i]);
while(RESET == usart_flag_get(USART0, USART_FLAG_TBE));
int _write(int fd, char *pBuffer, int size) {
for (int i = 0; i < size; i++) {
usart_data_transmit(USART0, (uint8_t) pBuffer[i]);
while (RESET == usart_flag_get(USART0, USART_FLAG_TBE));
}
return size;
}

33
src/peripheral.c
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@@ -1,33 +0,0 @@
//
// Created by yelv1 on 24-9-22.
//
#include "peripheral.h"
#include "gd32e23x.h"
void usart_config(void)
{
rcu_periph_clock_enable(RCU_GPIOA);
rcu_periph_clock_enable(RCU_USART0);
gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_3);
gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_2);
gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_3);
gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, GPIO_PIN_3);
gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_2);
gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, GPIO_PIN_2);
usart_deinit(USART0);
usart_baudrate_set(USART0, 115200U);
usart_receive_config(USART0, USART_RECEIVE_ENABLE);
usart_transmit_config(USART0, USART_TRANSMIT_ENABLE);
usart_enable(USART0);
gpio_mode_set(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_4);
gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_4);
gpio_bit_write(GPIOA, GPIO_PIN_4, SET);
}

46
src/usart.c Normal file
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@@ -0,0 +1,46 @@
//
// Created by yelv1 on 24-12-30.
//
#include "usart.h"
/**
* @brief configure the USART
* @param none
* @retval none
*/
void usart_config(void)
{
rcu_periph_clock_enable(USART_GPIO_RCU);
rcu_periph_clock_enable(USART_RCU);
gpio_af_set(USART_GPIO_PORT, USART_GPIO_AF, USART_RX_PIN);
gpio_af_set(USART_GPIO_PORT, USART_GPIO_AF, USART_TX_PIN);
gpio_mode_set(USART_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, USART_RX_PIN);
gpio_output_options_set(USART_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, USART_RX_PIN);
gpio_mode_set(USART_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, USART_TX_PIN);
gpio_output_options_set(USART_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, USART_TX_PIN);
usart_deinit(USART_PHY);
usart_baudrate_set(USART_PHY, USART_PHY_BAUDRATE);
usart_receive_config(USART_PHY, USART_RECEIVE_ENABLE);
usart_transmit_config(USART_PHY, USART_TRANSMIT_ENABLE);
usart_enable(USART_PHY);
}
/**
* @brief configure the RS485(MAX13487) driver
* @param none
* @retval none
*/
void rs485_config(void)
{
usart_config();
gpio_mode_set(RS485_EN_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, RS485_EN_PIN);
gpio_output_options_set(RS485_EN_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, RS485_EN_PIN);
gpio_bit_write(RS485_EN_PORT, RS485_EN_PIN, SET); //auto dircetion control
}