hulk/xlsw_3dp_LDC1612
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RS485 test

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This commit is contained in:
yelvlab 2025-04-01 23:19:51 +08:00
parent da22e0eff9
commit a9599bae5e
3 changed files with 23 additions and 6 deletions
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2
src/led.c
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@ -28,5 +28,5 @@ void led_config(void) {
timer_enable(LED_BLINK_TIMER);
nvic_irq_enable(LED_BLINK_IRQ, 2);
nvic_irq_enable(LED_BLINK_IRQ, 3U);
}

7
src/main.c
View File

@ -38,6 +38,13 @@ int main(void) {
/* Initialize watchdog */
watchdog_init();
// usart_rs485_driver_enable()
// gpio_bit_set(RS485_GPIO_PORT, RS485_EN_PIN);
delay_ms(5);
printf("RS485 EN PIN RESET\n");
// gpio_bit_set(RS485_GPIO_PORT, RS485_EN_PIN);
while (1) {
delay_ms(99);
fwdgt_counter_reload();

20
src/rs485.c
View File

@ -11,24 +11,34 @@ void rs485_config(void) {
rcu_periph_clock_enable(RS485_GPIO_RCU);
rcu_periph_clock_enable(RS485_RCU);
gpio_af_set(RS485_GPIO_PORT, GPIO_AF_1, GPIO_PIN_2 | GPIO_PIN_3);
gpio_af_set(RS485_GPIO_PORT, GPIO_AF_1, RS485_TX_PIN | RS485_RX_PIN | RS485_EN_PIN);
/* configure USART Tx&Rx as alternate function push-pull */
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_10MHZ, RS485_TX_PIN | RS485_RX_PIN);
/* configure RS485 EN Pin */
gpio_mode_set(RS485_GPIO_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, RS485_EN_PIN);
gpio_mode_set(RS485_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_NONE, RS485_EN_PIN);
gpio_output_options_set(RS485_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, RS485_EN_PIN);
gpio_bit_write(RS485_GPIO_PORT, RS485_EN_PIN, SET);
/* USART configure */
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_parity_config(RS485_PHY, USART_PM_NONE);
// usart_word_length_set(RS485_PHY, USART_WL_8BIT);
// usart_stop_bit_set(RS485_PHY, USART_STB_1BIT);
// usart_receive_config(RS485_PHY, USART_RECEIVE_ENABLE);
// usart_transmit_config(RS485_PHY, USART_TRANSMIT_ENABLE);
usart_enable(RS485_PHY);
usart_driver_assertime_config(RS485_PHY, 0x01);
usart_driver_deassertime_config(RS485_PHY, 0x01);
// usart_depolarity_config(USART0, USART_DEP_HIGH);
// usart_depolarity_config(USART0, USART_DEP_LOW);
// usart_enable(RS485_PHY);
usart_rs485_driver_enable(RS485_PHY);
nvic_irq_enable(USART0_IRQn, 0);
usart_interrupt_enable(RS485_PHY, USART_INT_RBNE);