备份

Core/Src/stm32f4xx_it.c

@@ -22,6 +22,7 @@
 #include "stm32f4xx_it.h"
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
+#include "ch438q.h"
 /* USER CODE END Includes */
 
 /* Private typedef -----------------------------------------------------------*/
@@ -170,7 +171,7 @@ void EXTI2_IRQHandler(void)
   /* USER CODE END EXTI2_IRQn 0 */
   HAL_GPIO_EXTI_IRQHandler(CH438_INT_Pin);
   /* USER CODE BEGIN EXTI2_IRQn 1 */
-
+  ch438_interrupt_handler();
   /* USER CODE END EXTI2_IRQn 1 */
 }
 

User/driver/ch438q.c

@@ -24,6 +24,9 @@ const uint8_t Interruptnum[] = {
     0x80,
 }; /* SSR寄存器中断号对应值 */
 
+uint8_t receive_data_buff[256];
+uint8_t receive_data_len;
+
 static void ch438_tranconfig(uint8_t uart_num);
 static void ch438_set_baudrate(uint8_t uart_num, uint32_t baudrate);
 
@@ -208,8 +211,16 @@ uint8_t ch438_recv_data(uint8_t uart_num, uint8_t *data)
     uint8_t data_len = 0;
     uint8_t *receive_data;
     receive_data = data;
+    uint16_t time_out = 1000;
+    // 等待数据准备好
     while ((ch438_read_reg(offsetadd[uart_num] | REG_LSR_ADDR, 1) & BIT_LSR_DATARDY) == 0)
-        ; // 等待数据准备好
+    {
+        time_out--;
+        if (time_out == 0)
+        {
+            break;
+        }
+    }
     while ((ch438_read_reg(offsetadd[uart_num] | REG_LSR_ADDR, 1) & BIT_LSR_DATARDY))
     {
         *receive_data = ch438_read_reg(offsetadd[uart_num] | REG_RBR_ADDR, 1);
@@ -223,3 +234,48 @@ uint8_t ch438_recv_data(uint8_t uart_num, uint8_t *data)
     return data_len;
 }
 
+void ch438_interrupt_handler(void)
+{
+    uint8_t gInterruptStatus; /* 全局中断状态 */
+    uint8_t InterruptStatus;  /* 独立串口中断状态 */
+    uint8_t i;
+
+    gInterruptStatus = ch438_read_reg(REG_SSR_ADDR, 1);
+
+    if (!gInterruptStatus)
+    {
+        return;
+    }
+
+    for (i = 0; i < 8; i++)
+    {
+        if (gInterruptStatus & Interruptnum[i]) /* 检测哪个串口发生中断 */
+        {
+            InterruptStatus = ch438_read_reg(offsetadd[i] | REG_IIR_ADDR, 1) & 0x0f; /* 读串口的中断状态 */
+
+            switch (InterruptStatus)
+            {
+            case INT_NOINT: /* 没有中断 */
+                break;
+            case INT_THR_EMPTY: /* THR空中断 */
+                break;
+            case INT_RCV_OVERTIME: /* 接收超时中断 */
+                receive_data_len = ch438_recv_data(i, receive_data_buff);
+                ch438_send_data(i, receive_data_buff, receive_data_len);
+                break;
+            case INT_RCV_SUCCESS: /* 接收数据可用中断 */
+                receive_data_len = ch438_recv_data(i, receive_data_buff);
+                ch438_send_data(i, receive_data_buff, receive_data_len);
+                break;
+            case INT_RCV_LINES: /* 接收线路状态中断 */
+                ch438_read_reg(offsetadd[i] | REG_LSR_ADDR, 1);
+                break;
+            case INT_MODEM_CHANGE: /* MODEM输入变化中断 */
+                ch438_read_reg(offsetadd[i] | REG_MSR_ADDR, 1);
+                break;
+            default:
+                break;
+            }
+        }
+    }
+}

User/driver/ch438q.h

@@ -132,4 +132,5 @@ uint8_t ch438_check_iir_reg(uint8_t uart_num);
 void ch438_init_config(uint8_t uart_num);
 void ch438_send_data(uint8_t uart_num, uint8_t *data, uint16_t len);
 uint8_t ch438_recv_data(uint8_t uart_num, uint8_t *data);
+void ch438_interrupt_handler(void);
 #endif