From a9599bae5ea9a47302e55439519b99a3879bb58a Mon Sep 17 00:00:00 2001
From: yelvlab <wanghao19950516@gmail.com>
Date: Tue, 1 Apr 2025 23:19:51 +0800
Subject: [PATCH] RS485 test

---
 src/led.c   |  2 +-
 src/main.c  |  7 +++++++
 src/rs485.c | 20 +++++++++++++++-----
 3 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/src/led.c b/src/led.c
index 31df075..df1704f 100644
--- a/src/led.c
+++ b/src/led.c
@@ -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);
 }
diff --git a/src/main.c b/src/main.c
index 85babea..6cf02e9 100644
--- a/src/main.c
+++ b/src/main.c
@@ -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();
diff --git a/src/rs485.c b/src/rs485.c
index 368f267..24da43b 100644
--- a/src/rs485.c
+++ b/src/rs485.c
@@ -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);