generated from hulk/gd32e23x_template_cmake_vscode
73 lines
2.7 KiB
C
73 lines
2.7 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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void rs485_init(void) {
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#ifndef RS485_MAX13487
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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_enable(RS485_PHY);
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nvic_irq_enable(USART0_IRQn, 0);
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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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#else
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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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gpio_af_set(RS485_GPIO_PORT, GPIO_AF_1, GPIO_PIN_2 | GPIO_PIN_3);
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/* configure USART Tx&Rx as alternate function push-pull */
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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_10MHZ, RS485_TX_PIN | RS485_RX_PIN);
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/* configure RS485 EN 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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gpio_bit_write(RS485_GPIO_PORT, RS485_EN_PIN, SET);
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/* USART configure */
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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_enable(RS485_PHY);
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nvic_irq_enable(USART0_IRQn, 0);
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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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#endif // RS485_MAX13487
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}
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