hulk/gd32e230_uart_ring_buffer
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yelvlab
2025-08-11 20:11:46 +08:00
parent c6c90800d4
commit 4a488429bf
13 changed files with 470 additions and 154 deletions
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96
Src/uart.c
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@@ -5,7 +5,9 @@
#include "board_config.h"
void uart0_init(void) {
void rs485_init(void) {
#ifndef RS485_MAX13487
/* 使能 GPIOA 和 USART0 时钟 */
rcu_periph_clock_enable(RS485_GPIO_RCU);
rcu_periph_clock_enable(RS485_RCU);
@@ -16,50 +18,84 @@ void uart0_init(void) {
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_mode_set(RS485_GPIO_PORT, GPIO_MODE_AF, 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(RS485_PHY);
usart_word_length_set(RS485_PHY, USART_WL_8BIT);
usart_stop_bit_set(RS485_PHY, USART_STB_1BIT);
usart_parity_config(RS485_PHY, USART_PM_NONE);
usart_baudrate_set(RS485_PHY, RS485_BAUDRATE);
usart_receive_config(RS485_PHY, USART_RECEIVE_ENABLE);
usart_transmit_config(RS485_PHY, USART_TRANSMIT_ENABLE);
usart_driver_assertime_config(RS485_PHY, 0x01);
usart_driver_deassertime_config(RS485_PHY, 0x01);
usart_driver_deassertime_config(RS485_PHY, 0x10);
usart_rs485_driver_enable(RS485_PHY);
usart_enable(RS485_PHY);
// TODO NVIC
nvic_irq_enable(USART0_IRQn, 0);
usart_interrupt_enable(RS485_PHY, USART_INT_RBNE);
// usart_interrupt_enable(RS485_PHY, USART_INT_IDLE);
#else
rcu_periph_clock_enable(RS485_GPIO_RCU);
rcu_periph_clock_enable(RS485_RCU);
gpio_af_set(RS485_GPIO_PORT, GPIO_AF_1, GPIO_PIN_2 | GPIO_PIN_3);
/* configure USART Tx&Rx as alternate function push-pull */
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_10MHZ, RS485_TX_PIN | RS485_RX_PIN);
/* configure RS485 EN 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);
gpio_bit_write(RS485_GPIO_PORT, RS485_EN_PIN, SET);
/* USART configure */
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);
usart_enable(RS485_PHY);
nvic_irq_enable(USART0_IRQn, 0);
usart_interrupt_enable(RS485_PHY, USART_INT_RBNE);
usart_interrupt_enable(RS485_PHY, USART_INT_IDLE);
#endif // RS485_MAX13487
}
static uart_printf_port_t g_printf_port = UART_PRINTF_USART0;
// static uart_printf_port_t g_printf_port = UART_PRINTF_USART0;
void uart_set_printf_port(uart_printf_port_t port) {
g_printf_port = port;
}
// void uart_set_printf_port(uart_printf_port_t port) {
// g_printf_port = port;
// }
// printf 重定向，支持多串口
int __io_putchar(int ch) {
switch (g_printf_port) {
case UART_PRINTF_USART0:
while (usart_flag_get(USART0, USART_FLAG_TBE) == RESET) {}
usart_data_transmit(USART0, (uint8_t)ch);
break;
case UART_PRINTF_USART1:
while (usart_flag_get(USART1, USART_FLAG_TBE) == RESET) {}
usart_data_transmit(USART1, (uint8_t)ch);
break;
case UART_PRINTF_BOTH:
while (usart_flag_get(USART0, USART_FLAG_TBE) == RESET) {}
usart_data_transmit(USART0, (uint8_t)ch);
while (usart_flag_get(USART1, USART_FLAG_TBE) == RESET) {}
usart_data_transmit(USART1, (uint8_t)ch);
break;
default:
break;
}
return ch;
}
// // printf 重定向，支持多串口
// int __io_putchar(int ch) {
// switch (g_printf_port) {
// case UART_PRINTF_USART0:
// while (usart_flag_get(USART0, USART_FLAG_TBE) == RESET) {}
// usart_data_transmit(USART0, (uint8_t)ch);
// break;
// case UART_PRINTF_USART1:
// while (usart_flag_get(USART1, USART_FLAG_TBE) == RESET) {}
// usart_data_transmit(USART1, (uint8_t)ch);
// break;
// case UART_PRINTF_BOTH:
// while (usart_flag_get(USART0, USART_FLAG_TBE) == RESET) {}
// usart_data_transmit(USART0, (uint8_t)ch);
// while (usart_flag_get(USART1, USART_FLAG_TBE) == RESET) {}
// usart_data_transmit(USART1, (uint8_t)ch);
// break;
// default:
// break;
// }
// return ch;
// }