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No commits in common. "c6c90800d4022fefab2c4715cfae17f8d978f7ea" and "c13a7abc84f4bb2864fab565712e505c7a587157" have entirely different histories.

5 changed files with 29 additions and 39 deletions

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@ -12,7 +12,6 @@
"type": "FILEPATH",
"value": "${sourceDir}/cmake/arm-none-eabi-gcc.cmake"
}
,"CMAKE_EXPORT_COMPILE_COMMANDS": "ON"
},
"architecture": {
"value": "unspecified",

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@ -9,15 +9,4 @@
/******************************************************************************/
#define RS485_RCU RCU_USART0
#define RS485_GPIO_RCU RCU_GPIOA
#define RS485_GPIO_PORT GPIOA
#define RS485_TX_PIN GPIO_PIN_2
#define RS485_RX_PIN GPIO_PIN_3
#define RS485_PHY USART0
#define RS485_BAUDRATE 115200U
#define RS485_EN_PIN GPIO_PIN_1
/******************************************************************************/
#endif //BOARD_CONFIG_H

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@ -9,7 +9,8 @@ typedef enum {
UART_PRINTF_BOTH = 2
} uart_printf_port_t;
void uart0_init(void);
void uart0_init(uint32_t baudrate);
void uart1_init(uint32_t baudrate);
void uart_set_printf_port(uart_printf_port_t port);
#endif // UART_H

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@ -47,7 +47,7 @@ OF SUCH DAMAGE.
int main(void)
{
systick_config();
uart0_init();
uart0_init(115200);
// uart1_init(115200); // 如需使用USART1请初始化
// printf("Hello USART0!\r\n");

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@ -2,38 +2,39 @@
#include "gd32e23x_usart.h"
#include "gd32e23x_rcu.h"
#include "gd32e23x_gpio.h"
#include "board_config.h"
void uart0_init(void) {
void uart0_init(uint32_t baudrate) {
/* 使能 GPIOA 和 USART0 时钟 */
rcu_periph_clock_enable(RS485_GPIO_RCU);
rcu_periph_clock_enable(RS485_RCU);
rcu_periph_clock_enable(RCU_GPIOA);
rcu_periph_clock_enable(RCU_USART0);
/* 配置 PA2 为 USART0_TXPA3 为 USART0_RX */
gpio_af_set(RS485_GPIO_PORT, GPIO_AF_1, RS485_TX_PIN | RS485_RX_PIN | RS485_EN_PIN);
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_output_options_set(RS485_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, RS485_EN_PIN);
/* 配置 PA9 为 USART0_TXPA10 为 USART0_RX */
gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_9 | GPIO_PIN_10);
gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_9 | GPIO_PIN_10);
gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_9 | GPIO_PIN_10);
/* 配置波特率、数据位、停止位等 */
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_deinit(USART0);
usart_baudrate_set(USART0, baudrate);
usart_receive_config(USART0, USART_RECEIVE_ENABLE);
usart_transmit_config(USART0, USART_TRANSMIT_ENABLE);
usart_enable(USART0);
}
usart_driver_assertime_config(RS485_PHY, 0x01);
usart_driver_deassertime_config(RS485_PHY, 0x01);
usart_rs485_driver_enable(RS485_PHY);
usart_enable(RS485_PHY);
// TODO NVIC
}
void uart1_init(uint32_t baudrate) {
rcu_periph_clock_enable(RCU_GPIOA);
rcu_periph_clock_enable(RCU_USART1);
// USART1 默认引脚为 PA2 (TX), PA3 (RX)
gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_2 | GPIO_PIN_3);
gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_2 | GPIO_PIN_3);
gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_2 | GPIO_PIN_3);
usart_deinit(USART1);
usart_baudrate_set(USART1, baudrate);
usart_receive_config(USART1, USART_RECEIVE_ENABLE);
usart_transmit_config(USART1, USART_TRANSMIT_ENABLE);
usart_enable(USART1);
}
static uart_printf_port_t g_printf_port = UART_PRINTF_USART0;