for debug

inc/board_config.h

@@ -41,13 +41,14 @@
 /******************************************************************************/
 
 #define USART_GPIO_RCU       RCU_GPIOA
-#define USART_RCU            RCU_USART0
+#define USART_RCU            RCU_USART1
 #define USART_GPIO_PORT      GPIOA
 #define USART_GPIO_AF        GPIO_AF_1
 #define USART_TX_PIN         GPIO_PIN_2
 #define USART_RX_PIN         GPIO_PIN_3
-#define USART_PHY            USART0
+#define USART_PHY            USART1
 #define USART_PHY_BAUDRATE   115200U
+#define USART_PHY_IRQ        USART1_IRQn
 #define RS485_EN_PORT        GPIOA
 #define RS485_EN_PIN         GPIO_PIN_4
 

inc/rs485_protocol.h

@@ -23,6 +23,11 @@
 #define PROTOCOL_BOARD_TYPE       0x04
 #define PROTOCOL_PACKAGE_LENGTH   0x02
 
+#define PACKET_START_BYTE         0xD5
+
+#define MAX_SERIAL_CMD_SIZE       16
+#define BUF_SIZE      8
+
 /******************************************************************************/
 
 typedef enum
@@ -34,26 +39,21 @@ typedef enum
     VALIDATION_LENGTH_ERROR = 8
 } validation_result_t;
 
-
-typedef enum
-{
-    PS_LEN = 0,
+typedef enum {
+    PS_LEN,
     PS_TYPE,
     PS_PAYLOAD,
     PS_CRC,
     PS_NULL
-} packet_state_t;
+}packet_state_t;
 
 /******************************************************************************/
 
-#define BUF_SIZE              8
-#define MAX_CMD_SIZE          16
-#define PACKET_START_BYTE     0xD5
-
+// void process_command(uint8_t* cmd, size_t length);
 
 bool code_seen(char code);
-// void process_command(uint8_t* cmd, size_t length);
-void process_command(void);
+
+float code_value(void);
 
 uint8_t calculate_crc(uint8_t data[], uint8_t data_length);
 
@@ -69,8 +69,10 @@ void gd60914_tempture_report(void);
 
 void ultrasonic_distance_report(void);
 
-void process_printer(void);
+void start_communication(void);
 
-void get_command (void);
+void get_command(void);
+
+void prcess_command(void);
 
 #endif //RS485_PROTOCOL_H

inc/usart.h

@@ -15,19 +15,15 @@ typedef struct
     unsigned char buffer[RX_BUFFER_SIZE];
     volatile unsigned int head;
     volatile unsigned int tail;
-}ring_buffer;
+}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 *rx_buffer);
-
-uint16_t uart_available(void);
-
-int uart_read(void);
-
-void store_char(unsigned char data, ring_buffer *rx_buffer);
+void store_char(unsigned char data, ring_buffer_t *rx_buf);
 
 uint16_t uart_available(void);
 

ld/gd32e23x_gcc.ld

@@ -1,7 +1,7 @@
 /* memory map */
 MEMORY
 {
-  FLASH (rx)      : ORIGIN = 0x08000000, LENGTH = 16K
+  FLASH (rx)      : ORIGIN = 0x08000000, LENGTH = 64K
   RAM (xrw)       : ORIGIN = 0x20000000, LENGTH = 8K
 }
 

src/gd32e23x_it.c

@@ -35,7 +35,7 @@ OF SUCH DAMAGE.
 #include "gd32e23x_it.h"
 
 extern uint16_t g_capture_value;
-ring_buffer rx_buffer = {{0}, 0, 0}; // ring buffer for USART0
+extern ring_buffer_t rx_buffer;
 
 /*!
     \brief      this function handles NMI exception
@@ -118,7 +118,7 @@ void TIMER5_IRQHandler(void) {
         } else {
             //! turn off led & reconfig timer13 period to 1000(100ms)
             gpio_bit_write(LED_PORT, LED_PIN, SET);
-            timer_autoreload_value_config(LED_BLINK_TIMER, 800);
+            timer_autoreload_value_config(LED_BLINK_TIMER, 8000);
         }
         led_status = !led_status;
     }
@@ -158,33 +158,28 @@ void EXTI0_1_IRQHandler(void) {
     }
 }
 
-void USART0_IRQHandler(void) {
+void USART1_IRQHandler(void) {
     // static uint8_t rx_index = 0;
     // static uint8_t rx_buffer[RX_BUFFER_SIZE];
-    //
-    // if (RESET != usart_interrupt_flag_get(USART0, USART_INT_FLAG_RBNE)) {
-    //     usart_interrupt_flag_clear(USART0, USART_INT_FLAG_RBNE);
-    //     uint8_t received_data = (uint8_t) usart_data_receive(USART0);
-    //
-    //     // 将接收到的数据存储到缓冲区
+
+    if (RESET != usart_interrupt_flag_get(USART_PHY, USART_INT_FLAG_RBNE)) {
+        // usart_interrupt_flag_clear(USART_PHY, USART_INT_FLAG_RBNE);
+        uint8_t received_data = (uint8_t) usart_data_receive(USART_PHY);
+
+        // printf("%c", received_data);
+        // 将接收到的数据存储到缓冲区
         // if (rx_index < RX_BUFFER_SIZE - 1) {
         //     rx_buffer[rx_index++] = received_data;
         // }
-    // }
+        store_char(received_data, &rx_buffer);
+    }
     //
     // if (RESET != usart_interrupt_flag_get(USART0, USART_INT_FLAG_IDLE)) {
     //     usart_interrupt_flag_clear(USART0, USART_INT_FLAG_IDLE);
     //
-    //     // process_command(rx_buffer, rx_index); // 处理指令
+    //     process_command(rx_buffer, rx_index); // 处理指令
     //
     //     rx_index = 0; // 重置缓冲区索引
     //     return;
     // }
-    static uint8_t data;
-    if (RESET != usart_interrupt_flag_get(USART0, USART_INT_FLAG_RBNE)) {
-        // usart_interrupt_flag_clear(USART0, USART_INT_FLAG_RBNE);
-        data = usart_data_receive(USART0);
-        store_char(data, &rx_buffer);
-        // process_command(&data, 1);
-    }
 }

src/main.c

@@ -6,6 +6,8 @@
 */
 #include "main.h"
 
+#include "newlib.h"
+
 volatile uint8_t g_temperature_uint8[2] = {0};
 volatile uint16_t g_capture_value;
 
@@ -25,13 +27,13 @@ int main(void)
     /* configure LED */
     led_blink_config();
     /* configure FWDGT */
-    watchdog_init();
+    // watchdog_init();
 
-#ifdef SOFTWARE_IIC
-    soft_i2c_config();
-#else
-    i2c_config();
-#endif
+// #ifdef SOFTWARE_IIC
+//     soft_i2c_config();
+// #else
+//     i2c_config();
+// #endif
 
     printf("system start!\r\n");
 
@@ -40,20 +42,21 @@ int main(void)
     while(1){
         // gd60914_get_object_tempture();
 
-        delay_ms(50);
-        printf("hello");
+        delay_ms(500);
+        start_communication();
+        printf("hello world!\r\n");
 
         // ultrasonic_pwm_out_cycles(ULTRASONIC_TX_CYCLES);
 
-        watchdog_reload();
+        // watchdog_reload();
     }
 }
 
 /* retarget the C library printf function to the USART */
 int _write(int fd, char *pBuffer, int size) {
     for (int i = 0; i < size; i++) {
-        usart_data_transmit(USART0, (uint8_t) pBuffer[i]);
-        while (RESET == usart_flag_get(USART0, USART_FLAG_TBE));
+        usart_data_transmit(USART1, (uint8_t) pBuffer[i]);
+        while (RESET == usart_flag_get(USART1, USART_FLAG_TBE));
     }
     return size;
 }

src/rs485_protocol.c

@@ -5,23 +5,37 @@
 #include "rs485_protocol.h"
 
 extern uint8_t g_temperature_uint8[2];
-static int buffer_index_r = 0;
-static int buffer_index_w = 0;
-static int buffer_length = 0;
-static char cmd_buffer[BUF_SIZE][MAX_CMD_SIZE];
+
+static int buf_index_r = 0;
+static int buf_index_w = 0;
+static int buf_length = 0;
+
+static char cmd_buffer[BUF_SIZE][MAX_SERIAL_CMD_SIZE];
+static char serial_char = 0x00;
+
 static int serial_count = 0;
-static uint8_t serial_char = 0x00;
-static packet_state_t packet_state = PS_NULL;
 static char *strchr_pointer = NULL;
 
+static packet_state_t packet_state = PS_LEN;
+
+// bool code_seen(char code) {
+//     // strchr_pointer = strchr(cmd_buffer[buf_index_r], code);
+//     return (strchr_pointer != NULL);  //Return True if a character was found
+// }
+
 bool code_seen(char code) {
-    strchr_pointer = strchr(cmd_buffer[buffer_index_r], code);
-    return (strchr_pointer != NULL);  //Return True if a character was found
+    strchr_pointer = NULL;
+    for (int i = 0; cmd_buffer[buf_index_r][i] != '\0'; i++) {
+        if (cmd_buffer[buf_index_r][i] == code) {
+            strchr_pointer = &cmd_buffer[buf_index_r][i];
+            break;
+        }
+    }
+    return (strchr_pointer != NULL);  // Return True if a character was found
 }
 
-float code_value(void)
-{
-    return (strtod(&cmd_buffer[buffer_index_r][strchr_pointer - cmd_buffer[buffer_index_r] + 1], NULL));
+float code_value(void) {
+    return (strtod(&cmd_buffer[buf_index_r][strchr_pointer - cmd_buffer[buf_index_r] + 1], NULL));
 }
 
 // void process_command(uint8_t *cmd, size_t length) {
@@ -140,19 +154,21 @@ void ultrasonic_distance_report(void) {
     printf("%c", calculate_crc(combined_data, 6));
 }
 
-
-void process_printer(void) {
-    if(buffer_length < (RX_BUFFER_SIZE - 1)) {
+void start_communication(void) {
+    if (buf_length < (BUF_SIZE - 1)) {
         get_command();
     }
-    if(buffer_length) {
-        process_command();
-        buffer_length = (buffer_length -1);
-        buffer_index_r = (buffer_index_r + 1) % BUF_SIZE;
+
+    if (buf_length) {
+        printf("DONE！\r\n");
+        prcess_command();
+        buf_length--;
+        buf_index_r = (buf_index_r + 1) % BUF_SIZE;
     }
+
 }
 
-void get_command (void) {
+void get_command(void) {
     static uint8_t check_sum = 0;
     static uint8_t packet_len ;
     static uint8_t packet_type;
@@ -160,20 +176,18 @@ void get_command (void) {
     serial_count = 0;
     serial_char=0;
 
-    if(uart_available() > 0)
+    if (uart_available() > 0)
         delay_ms(5);
-    while(uart_available() > 0 && buffer_length < BUF_SIZE) {
+    while (uart_available() > 0 && buf_length < BUF_SIZE) {
         delay_us(100);
         serial_char = uart_read();
-
         switch (packet_state) {
             case PS_NULL:
                 if (serial_char == PACKET_START_BYTE) {
+                    packet_state = PS_TYPE;
                     serial_count = 0;
                     check_sum = 0;
-                    packet_state = PS_TYPE;
-                } else
-                {
+                } else {
                     serial_count = 0;
                 }
                 break;
@@ -183,53 +197,45 @@ void get_command (void) {
                 packet_state = PS_LEN;
                 break;
             case PS_LEN:
-                packet_len = serial_char;
                 check_sum += serial_char;
+                packet_len = serial_char;
                 packet_state = PS_PAYLOAD;
                 break;
             case PS_PAYLOAD:
                 check_sum += serial_char;
-                cmd_buffer[buffer_index_w][serial_count++] = serial_char;
-                if (serial_count == packet_len)
+                cmd_buffer[buf_index_w][serial_count++] = serial_char;
+                if (serial_count >= packet_len) {
                     packet_state = PS_CRC;
+                }
                 break;
             case PS_CRC:
                 packet_state = PS_NULL;
-                if (!serial_count || check_sum != serial_char)
-                {
+                if (!serial_count || check_sum != serial_char) {
                     serial_count = 0;
                     return;
                 }
-                cmd_buffer[buffer_index_w][serial_count] = 0; // 终止字符串
-                buffer_index_w = (buffer_index_w + 1) % BUF_SIZE;
-                buffer_length += 1;
+                cmd_buffer[buf_index_w][serial_count] = 0;
+                buf_index_w = (buf_index_w + 1) % BUF_SIZE;
+                buf_length++;
                 serial_count = 0;
-                break;
             default:
-                packet_state = PS_NULL;
-                serial_count = 0;
                 break;
         }
     }
 }
 
-void process_command(void) {
+void prcess_command(void) {
     if (code_seen('M')) {
-        switch ((int) code_value()) {
+        switch ((int)code_value()) {
             case 1:
                 // ultrasonic_distance_report();
-                    printf("%c%c%c%c%c%c", 0xB5, 0xF1, 0x02, 0x6F, 0x6B, 0xF1);
+                    printf("M1");
                 break;
             case 2:
                 // gd60914_tempture_report();
-                    printf("%c%c%c%c%c%c", 0xB5, 0xF1, 0x02, 0x6F, 0x6B, 0xF2);
-                break;
-            case 3:
-                printf("%c%c%c%c%c%c", 0xB5, 0xF1, 0x02, 0x6F, 0x6B, 0xCC);
-                fwdgt_reset_mcu();
+                    printf("M2");
                 break;
             default:
-                printf("%c%c%c%c%c%c%c", 0xB5, 0xF0, 0x03, 0x65, 0x72, 0x72, 0x3C);
                 break;
         }
     }

src/usart.c

@@ -4,8 +4,6 @@
 
 #include "usart.h"
 
-extern ring_buffer rx_buffer; // ring buffer for USART0
-
 /**
  * @brief  configure the USART
  * @param  none
@@ -29,13 +27,9 @@ void usart_config(void)
     usart_receive_config(USART_PHY, USART_RECEIVE_ENABLE);
     usart_transmit_config(USART_PHY, USART_TRANSMIT_ENABLE);
 
-    /* USART configure */
-    // usart_deinit(USART_PHY);
-    // usart_baudrate_set(USART_PHY, 115200U);
-    // usart_receive_config(USART_PHY, USART_RECEIVE_ENABLE);
-    // usart_transmit_config(USART_PHY, USART_TRANSMIT_ENABLE);
+    nvic_irq_enable(USART_PHY_IRQ, 0);
     usart_interrupt_enable(USART_PHY, USART_INT_RBNE);
-    usart_interrupt_enable(USART_PHY, USART_INT_IDLE);
+    // usart_interrupt_enable(USART_PHY, USART_INT_IDLE);
     usart_enable(USART_PHY);
 }
 
@@ -54,12 +48,12 @@ void rs485_config(void)
     gpio_bit_write(RS485_EN_PORT, RS485_EN_PIN, SET); //auto dircetion control
 }
 
-void store_char(unsigned char data, ring_buffer *rx_buffer) {
-    uint16_t i = (unsigned int)(rx_buffer->head + 1) % RX_BUFFER_SIZE;
+void store_char(unsigned char data, ring_buffer_t *rx_buf) {
+    uint16_t i = (unsigned int)(rx_buf->head + 1) % RX_BUFFER_SIZE;
 
-    if (i != rx_buffer->tail) {
-        rx_buffer->buffer[rx_buffer->head] = data;
-        rx_buffer->head = i;
+    if (i != rx_buf->tail) {
+        rx_buf->buffer[rx_buf->head] = data;
+        rx_buf->head = i;
     }
 }