generated from hulk/gd32e23x_template_cmake_vscode
72 lines
2.3 KiB
C
72 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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#include "board_config.h"
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#include "uart_ring_buffer.h"
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void rs485_init(void) {
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/* 使能 GPIOA 和 USART0 时钟 */
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rcu_periph_clock_enable(RS485_GPIO_RCU);
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rcu_periph_clock_enable(RS485_RCU);
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/* 配置 PA2 为 USART0_TX，PA3 为 USART0_RX */
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gpio_af_set(RS485_GPIO_PORT, GPIO_AF_1, RS485_TX_PIN | RS485_RX_PIN | RS485_EN_PIN);
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gpio_mode_set(RS485_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, RS485_TX_PIN | RS485_RX_PIN);
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gpio_output_options_set(RS485_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, RS485_TX_PIN | RS485_RX_PIN);
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gpio_mode_set(RS485_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_NONE, RS485_EN_PIN);
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gpio_output_options_set(RS485_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, RS485_EN_PIN);
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/* 配置波特率、数据位、停止位等 */
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usart_deinit(RS485_PHY);
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usart_word_length_set(RS485_PHY, USART_WL_8BIT);
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usart_stop_bit_set(RS485_PHY, USART_STB_1BIT);
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usart_parity_config(RS485_PHY, USART_PM_NONE);
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usart_baudrate_set(RS485_PHY, RS485_BAUDRATE);
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usart_receive_config(RS485_PHY, USART_RECEIVE_ENABLE);
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usart_transmit_config(RS485_PHY, USART_TRANSMIT_ENABLE);
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usart_driver_assertime_config(RS485_PHY, 0x01);
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usart_driver_deassertime_config(RS485_PHY, 0x10);
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usart_rs485_driver_enable(RS485_PHY);
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usart_interrupt_enable(RS485_PHY, USART_INT_RBNE);
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// usart_interrupt_enable(RS485_PHY, USART_INT_IDLE);
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nvic_irq_enable(RS485_IRQ, 0);
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usart_enable(RS485_PHY);
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}
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uint32_t rs485_send_byte(uint8_t data) {
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// 等待发送缓冲区空
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while (RESET == usart_flag_get(RS485_PHY, USART_FLAG_TBE));
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// 发送数据
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usart_data_transmit(RS485_PHY, data);
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// 等待发送完成
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while (RESET == usart_flag_get(RS485_PHY, USART_FLAG_TC));
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return 0; // 成功
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}
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uint32_t rs485_send_str(uint8_t* str, uint16_t len) {
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// 发送数据 - 最优化版本，避免索引变量
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uint8_t* end = str + len;
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while (str < end) {
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// 等待发送缓冲区空
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while (RESET == usart_flag_get(RS485_PHY, USART_FLAG_TBE));
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usart_data_transmit(RS485_PHY, *str++);
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}
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// 等待最后一个字节发送完成（重要！）
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while (RESET == usart_flag_get(RS485_PHY, USART_FLAG_TC));
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return 0; // 成功
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}
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