hulk/gd32e230_uart_ring_buffer
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This commit is contained in:
yelvlab
2025-08-11 00:37:12 +08:00
parent c13a7abc84
commit 63d3c30607
5 changed files with 37 additions and 29 deletions
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2
Src/main.c
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@@ -47,7 +47,7 @@ OF SUCH DAMAGE.
int main(void)
{
systick_config();
uart0_init(115200);
uart0_init();
// uart1_init(115200); // 如需使用USART1请初始化
// printf("Hello USART0!\r\n");

49
Src/uart.c
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@@ -2,39 +2,36 @@
#include "gd32e23x_usart.h"
#include "gd32e23x_rcu.h"
#include "gd32e23x_gpio.h"
#include "board_config.h"
void uart0_init(uint32_t baudrate) {
void uart0_init(void) {
/* 使能 GPIOA 和 USART0 时钟 */
rcu_periph_clock_enable(RCU_GPIOA);
rcu_periph_clock_enable(RCU_USART0);
rcu_periph_clock_enable(RS485_GPIO_RCU);
rcu_periph_clock_enable(RS485_RCU);
/* 配置 PA9 为 USART0_TX，PA10 为 USART0_RX */
gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_9 | GPIO_PIN_10);
gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_9 | GPIO_PIN_10);
gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_9 | GPIO_PIN_10);
/* 配置 PA2 为 USART0_TX，PA3 为 USART0_RX */
gpio_af_set(RS485_GPIO_PORT, GPIO_AF_1, RS485_TX_PIN | RS485_RX_PIN | RS485_EN_PIN);
gpio_mode_set(RS485_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, RS485_TX_PIN | RS485_RX_PIN);
gpio_output_options_set(RS485_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, RS485_TX_PIN | RS485_RX_PIN);
gpio_mode_set(RS485_GPIO_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, RS485_EN_PIN);
gpio_output_options_set(RS485_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, RS485_EN_PIN);
/* 配置波特率、数据位、停止位等 */
usart_deinit(USART0);
usart_baudrate_set(USART0, baudrate);
usart_receive_config(USART0, USART_RECEIVE_ENABLE);
usart_transmit_config(USART0, USART_TRANSMIT_ENABLE);
usart_enable(USART0);
}
usart_deinit(RS485_PHY);
usart_baudrate_set(RS485_PHY, RS485_BAUDRATE);
usart_receive_config(RS485_PHY, USART_RECEIVE_ENABLE);
usart_transmit_config(RS485_PHY, USART_TRANSMIT_ENABLE);
void uart1_init(uint32_t baudrate) {
rcu_periph_clock_enable(RCU_GPIOA);
rcu_periph_clock_enable(RCU_USART1);
// USART1 默认引脚为 PA2 (TX), PA3 (RX)
gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_2 | GPIO_PIN_3);
gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_2 | GPIO_PIN_3);
gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_2 | GPIO_PIN_3);
usart_deinit(USART1);
usart_baudrate_set(USART1, baudrate);
usart_receive_config(USART1, USART_RECEIVE_ENABLE);
usart_transmit_config(USART1, USART_TRANSMIT_ENABLE);
usart_enable(USART1);
}
usart_driver_assertime_config(RS485_PHY, 0x01);
usart_driver_deassertime_config(RS485_PHY, 0x01);
usart_rs485_driver_enable(RS485_PHY);
usart_enable(RS485_PHY);
}
static uart_printf_port_t g_printf_port = UART_PRINTF_USART0;