暂存

inc/rs485_protocol.h

@@ -13,17 +13,19 @@
 #include "fwdgt.h"
 #include <stddef.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include "ultrasonic_analog.h"
 
 /******************************************************************************/
 
-#define RX_BUFFER_SIZE            32
-
 #define PROTOCOL_PACKAGE_HEADER   0xD5
 #define PROTOCOL_BOARD_TYPE       0x04
 #define PROTOCOL_PACKAGE_LENGTH   0x02
 
+#define MAX_SERIAL_CMD_SIZE       16
+#define MAX_SERIAL_CMD_COUNT      8
+
 /******************************************************************************/
 
 typedef enum
@@ -35,9 +37,21 @@ typedef enum
     VALIDATION_LENGTH_ERROR = 8
 } validation_result_t;
 
+typedef enum {
+    PS_LEN,
+    PS_TYPE,
+    PS_PAYLOAD,
+    PS_CRC,
+    PS_NULL
+}packet_state_t;
+
 /******************************************************************************/
 
-void process_command(uint8_t* cmd, size_t length);
+// void process_command(uint8_t* cmd, size_t length);
+
+bool code_seen(char code);
+
+float code_value(void);
 
 uint8_t calculate_crc(uint8_t data[], uint8_t data_length);
 
@@ -53,4 +67,10 @@ void gd60914_tempture_report(void);
 
 void ultrasonic_distance_report(void);
 
+void start_communication(void);
+
+void get_command(void);
+
+void prcess_command(void);
+
 #endif //RS485_PROTOCOL_H

inc/usart.h

@@ -8,8 +8,25 @@
 #include "gd32e23x.h"
 #include "board_config.h"
 
+#define RX_BUFFER_SIZE            64
+
+typedef struct
+{
+    unsigned char buffer[RX_BUFFER_SIZE];
+    volatile unsigned int head;
+    volatile unsigned int tail;
+}ring_buffer_t;
+
+static ring_buffer_t rx_buffer = {{0}, 0, 0}; // ring buffer for USART0
+
 void usart_config(void);
 
 void rs485_config(void);
 
+void store_char(unsigned char data, ring_buffer_t *rx_buf);
+
+uint16_t uart_available(void);
+
+int uart_read(void);
+
 #endif //USART_H