generated from hulk/gd32e23x_template_cmake_vscode
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c6c90800d4
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c13a7abc84
@ -12,7 +12,6 @@
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"type": "FILEPATH",
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"value": "${sourceDir}/cmake/arm-none-eabi-gcc.cmake"
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}
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,"CMAKE_EXPORT_COMPILE_COMMANDS": "ON"
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},
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"architecture": {
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"value": "unspecified",
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@ -9,15 +9,4 @@
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/******************************************************************************/
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#define RS485_RCU RCU_USART0
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#define RS485_GPIO_RCU RCU_GPIOA
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#define RS485_GPIO_PORT GPIOA
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#define RS485_TX_PIN GPIO_PIN_2
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#define RS485_RX_PIN GPIO_PIN_3
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#define RS485_PHY USART0
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#define RS485_BAUDRATE 115200U
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#define RS485_EN_PIN GPIO_PIN_1
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/******************************************************************************/
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#endif //BOARD_CONFIG_H
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@ -9,7 +9,8 @@ typedef enum {
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UART_PRINTF_BOTH = 2
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} uart_printf_port_t;
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void uart0_init(void);
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void uart0_init(uint32_t baudrate);
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void uart1_init(uint32_t baudrate);
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void uart_set_printf_port(uart_printf_port_t port);
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#endif // UART_H
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@ -47,7 +47,7 @@ OF SUCH DAMAGE.
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int main(void)
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{
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systick_config();
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uart0_init();
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uart0_init(115200);
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// uart1_init(115200); // 如需使用USART1请初始化
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// printf("Hello USART0!\r\n");
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51
Src/uart.c
51
Src/uart.c
@ -2,38 +2,39 @@
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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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void uart0_init(void) {
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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(RS485_GPIO_RCU);
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rcu_periph_clock_enable(RS485_RCU);
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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 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_OUTPUT, 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 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(RS485_PHY);
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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_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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usart_driver_assertime_config(RS485_PHY, 0x01);
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usart_driver_deassertime_config(RS485_PHY, 0x01);
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usart_rs485_driver_enable(RS485_PHY);
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usart_enable(RS485_PHY);
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// TODO NVIC
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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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