generated from hulk/gd32f4xx_template_cmake_vscode
92 lines
3.2 KiB
C
92 lines
3.2 KiB
C
#include "uart.h"
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#include "gd32f4xx_usart.h"
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#include "gd32f4xx_rcu.h"
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#include "gd32f4xx_gpio.h"
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#include "board_config.h"
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#include "uart_ring_buffer.h"
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void uart_init(void) {
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/* 使能 GPIOA 和 USART 时钟 */
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rcu_periph_clock_enable(UART_GPIO_RCU);
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rcu_periph_clock_enable(UART_RCU);
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/* 配置 PA2 为 USART1_TX，PA3 为 USART1_RX（AF7），debug 口纯串口 */
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gpio_af_set(UART_GPIO_PORT, GPIO_AF_7, UART_TX_PIN | UART_RX_PIN);
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gpio_mode_set(UART_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, UART_TX_PIN | UART_RX_PIN);
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gpio_output_options_set(UART_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, UART_TX_PIN | UART_RX_PIN);
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/* 配置波特率、数据位、停止位等 */
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usart_deinit(UART_PHY);
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usart_word_length_set(UART_PHY, USART_WL_8BIT);
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usart_stop_bit_set(UART_PHY, USART_STB_1BIT);
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usart_parity_config(UART_PHY, USART_PM_NONE);
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usart_baudrate_set(UART_PHY, UART_BAUDRATE);
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usart_receive_config(UART_PHY, USART_RECEIVE_ENABLE);
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usart_transmit_config(UART_PHY, USART_TRANSMIT_ENABLE);
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usart_enable(UART_PHY);
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nvic_irq_enable(UART_IRQ, 0, 0);
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usart_interrupt_enable(UART_PHY, USART_INT_RBNE);
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}
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void uart_rx_irq_pause(void) {
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usart_interrupt_disable(UART_PHY, USART_INT_RBNE);
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}
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void uart_rx_irq_resume(void) {
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usart_interrupt_enable(UART_PHY, USART_INT_RBNE);
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}
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void debug_uart_write(uint8_t byte) {
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/* 等待发送缓冲区空后写入 debug 串口 */
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while (RESET == usart_flag_get(DEBUG_UART, USART_FLAG_TBE)) {}
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usart_data_transmit(DEBUG_UART, byte);
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}
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/******************************************************************************/
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/* 具体的中断处理函数实现 */
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/******************************************************************************/
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void usart1_irq_handler(void) {
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// 处理USART1的接收中断
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if(usart_interrupt_flag_get(USART1, USART_INT_FLAG_RBNE)) {
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uint8_t data = usart_data_receive(USART1);
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(void)uart_ring_buffer_put(data); // 缓冲满时丢弃，返回值可用于统计
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}
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// 处理USART1的空闲中断
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if(usart_interrupt_flag_get(USART1, USART_INT_FLAG_IDLE)) {
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usart_interrupt_flag_clear(USART1, USART_INT_FLAG_IDLE);
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}
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}
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/* 调试串口初始化（与 uart_init 相同配置的独立入口，便于单独初始化打印口） */
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void debug_usart_init(void)
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{
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/* 使能 GPIOA 和 USART1 时钟 */
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rcu_periph_clock_enable(RCU_GPIOA);
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rcu_periph_clock_enable(RCU_USART1);
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/* 配置 PA2(TX) 和 PA3(RX) 复用功能 AF7 */
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gpio_af_set(GPIOA, GPIO_AF_7, GPIO_PIN_2 | GPIO_PIN_3);
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/* 配置 GPIO 模式 */
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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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/* USART1 配置 */
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usart_deinit(USART1);
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usart_baudrate_set(USART1, 115200U);
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usart_word_length_set(USART1, USART_WL_8BIT);
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usart_stop_bit_set(USART1, USART_STB_1BIT);
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usart_parity_config(USART1, USART_PM_NONE);
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usart_hardware_flow_rts_config(USART1, USART_RTS_DISABLE);
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usart_hardware_flow_cts_config(USART1, USART_CTS_DISABLE);
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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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