添加485获取特定命令的代码

CMakeLists.txt

@@ -29,6 +29,7 @@ set(TARGET_C_SRC
         ${CMAKE_SOURCE_DIR}/src/systick.c
         ${CMAKE_SOURCE_DIR}/src/ultrasonic_driver.c
         ${CMAKE_SOURCE_DIR}/src/mlx90614.c
+        ${CMAKE_SOURCE_DIR}/src/RS485.c
 )
 
 add_executable(xlsw_3dp_ultrasonic_300K ${TARGET_C_SRC})

inc/RS485.h

@@ -0,0 +1,11 @@
+//
+// Created by dell on 24-11-29.
+//
+
+#ifndef RS485_H
+#define RS485_H
+
+#include <stdbool.h>
+#include <string.h>
+
+#endif //RS485_H

inc/ultrasonic_driver.h

@@ -34,12 +34,14 @@
 
 #define USART_RCU            RCU_USART0
 #define USART_GPIO_RCU       RCU_GPIOA
-#define USARET_GPIO_PORT     GPIOA
+#define USART_GPIO_PORT      GPIOA
 #define USART_TX_PIN         GPIO_PIN_2
 #define USART_RX_PIN         GPIO_PIN_3
 #define USART0_PHY           USART0
 #define USART_BAUDRATE       115200U
 
+#define USART_EN_PIN         GPIO_PIN_4
+
 #define US_TRAN_GPIO_RCU     RCU_GPIOB
 #define US_TRAN_GPIO_PORT    GPIOB
 #define US_TRAN_PIN          GPIO_PIN_1

openocd_gd32e230f4.cfg

@@ -1,7 +1,7 @@
 # 连接cmsis-dap（喝粥）
 ; interface cmsis-dap
 source [find interface/cmsis-dap.cfg]
-
+; source [find interface/jlink.cfg]
 # 选择SWD
 transport select swd
 

src/RS485.c

@@ -0,0 +1,29 @@
+//
+// Created by dell on 24-11-29.
+//
+
+#include "RS485.h"
+#include "gd32e23x.h"
+#include "systick.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+#define MAX_CMD_SIZE 16
+#define BUFSIZE 8
+
+static char cmdbuffer[BUFSIZE][MAX_CMD_SIZE];
+static char *strchr_pointer = NULL;
+
+static int bufindr = 0;
+static int bufindw = 0;
+static int buflen = 0;
+
+bool code_seen(char code)
+{
+    strchr_pointer = strchr(cmdbuffer[bufindr], code);
+    return (strchr_pointer != NULL);  //Return True if a character was found
+}
+float code_value(void)
+{
+    return (strtod(&cmdbuffer[bufindr][strchr_pointer - cmdbuffer[bufindr] + 1], NULL));
+}

src/ultrasonic_driver.c

@@ -39,11 +39,16 @@ void usart_config(void)
     rcu_periph_clock_enable(USART_GPIO_RCU);
     rcu_periph_clock_enable(USART_RCU);
 
-    gpio_af_set(USARET_GPIO_PORT, GPIO_AF_1, GPIO_PIN_2 | GPIO_PIN_3);
+    gpio_af_set(USART_GPIO_PORT, GPIO_AF_1, GPIO_PIN_2 | GPIO_PIN_3);
 
-    /* configure USART Tx as alternate function push-pull */
-    gpio_mode_set(USARET_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, USART_TX_PIN | USART_RX_PIN);
-    gpio_output_options_set(USARET_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, USART_TX_PIN | USART_RX_PIN);
+    /* configure USART Tx&Rx as alternate function push-pull */
+    gpio_mode_set(USART_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, USART_TX_PIN | USART_RX_PIN);
+    gpio_output_options_set(USART_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, USART_TX_PIN | USART_RX_PIN);
+
+    /* configure RS485 EN Pin */
+    gpio_mode_set(USART_GPIO_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, USART_EN_PIN);
+    gpio_output_options_set(USART_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, USART_EN_PIN);
+    gpio_bit_write(USART_GPIO_PORT, USART_EN_PIN, SET);
 
     /* USART configure */
     usart_deinit(USART0_PHY);