67 lines
2.3 KiB
C
67 lines
2.3 KiB
C
#include "uart.h"
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#include "gd32e23x_usart.h"
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#include "gd32e23x_rcu.h"
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#include "gd32e23x_gpio.h"
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void uart0_init(uint32_t baudrate) {
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/* 使能 GPIOA 和 USART0 时钟 */
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rcu_periph_clock_enable(RCU_GPIOA);
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rcu_periph_clock_enable(RCU_USART0);
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/* 配置 PA9 为 USART0_TX，PA10 为 USART0_RX */
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gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_9 | GPIO_PIN_10);
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gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_9 | GPIO_PIN_10);
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gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_9 | GPIO_PIN_10);
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/* 配置波特率、数据位、停止位等 */
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usart_deinit(USART0);
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usart_baudrate_set(USART0, baudrate);
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usart_receive_config(USART0, USART_RECEIVE_ENABLE);
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usart_transmit_config(USART0, USART_TRANSMIT_ENABLE);
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usart_enable(USART0);
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}
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void uart1_init(uint32_t baudrate) {
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rcu_periph_clock_enable(RCU_GPIOA);
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rcu_periph_clock_enable(RCU_USART1);
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// USART1 默认引脚为 PA2 (TX), PA3 (RX)
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gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_2 | GPIO_PIN_3);
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gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_2 | GPIO_PIN_3);
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gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_2 | GPIO_PIN_3);
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usart_deinit(USART1);
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usart_baudrate_set(USART1, baudrate);
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usart_receive_config(USART1, USART_RECEIVE_ENABLE);
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usart_transmit_config(USART1, USART_TRANSMIT_ENABLE);
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usart_enable(USART1);
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}
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static uart_printf_port_t g_printf_port = UART_PRINTF_USART0;
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void uart_set_printf_port(uart_printf_port_t port) {
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g_printf_port = port;
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}
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// printf 重定向，支持多串口
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int __io_putchar(int ch) {
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switch (g_printf_port) {
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case UART_PRINTF_USART0:
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while (usart_flag_get(USART0, USART_FLAG_TBE) == RESET) {}
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usart_data_transmit(USART0, (uint8_t)ch);
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break;
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case UART_PRINTF_USART1:
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while (usart_flag_get(USART1, USART_FLAG_TBE) == RESET) {}
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usart_data_transmit(USART1, (uint8_t)ch);
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break;
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case UART_PRINTF_BOTH:
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while (usart_flag_get(USART0, USART_FLAG_TBE) == RESET) {}
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usart_data_transmit(USART0, (uint8_t)ch);
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while (usart_flag_get(USART1, USART_FLAG_TBE) == RESET) {}
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usart_data_transmit(USART1, (uint8_t)ch);
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break;
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default:
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break;
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}
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return ch;
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}
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