添加串口4协议解析

source/msp/UART4.C

@@ -55,11 +55,13 @@ msp/uartx.c    底层代码	 和cpu相关 缓存发送也放在里面
 -----------------------------------------------------------------------------------------
 ********************************************************************************/
 #include "uart4.h"
+#include "../tpc/debug.h"
 
 //发送缓冲区
 static volatile Ts_uart_send_buf idata ts_uart_send_buf;
 //接收缓冲区最多存放16个字符，这个值尽量小，但要大于实际处理协议的缓冲区大小
-static U8 uart4_recv_buf[16];
+#define RECV_BUF_SIZE 32
+static U8 uart4_recv_buf[RECV_BUF_SIZE];
 Ts_uart_recv_buf ts_uart4_recv_buf; 
 
 //#define FOSC 11059200L          //系统频率
@@ -95,16 +97,24 @@ void L0_uart4_init(void)//115200bps@11.0592MHz
 
 void L0_uart4_buf_init(void)
 {						
+	//初始化协议发送缓冲区
 	ts_uart[uNum4].p = &ts_uart_send_buf;
 	ts_uart[uNum4].p->now = 0;
 	ts_uart[uNum4].p->ok = D_ready;
+
+	//初始化协议接收缓冲区
 	ts_uart[uNum4].t = &ts_uart4_recv_buf;
 	ts_uart[uNum4].t->buf = uart4_recv_buf;
-	ts_uart[uNum4].t->head_0 = D_CMD_Filter1_ff;
-	ts_uart[uNum4].t->head_1 = D_CMD_Filter2_fe;
 	ts_uart[uNum4].t->head = 0;
 	ts_uart[uNum4].t->ok = 0;
-	ts_uart[uNum4].tp_handler = L1_s2b_PH3;
+
+	//串口协议解析专用字段
+	ts_uart[uNum4].t->head_0 = 0xAA;
+	ts_uart[uNum4].t->head_1 = 0x55;
+	ts_uart[uNum4].t->maxnum = RECV_BUF_SIZE;
+	ts_uart[uNum4].tp_handler = L1_s2b_485;
+
+	//串口初始化
 	L0_uart4_init();
 	D_uart4_ES_INT(1); //打开串口中断
 	
@@ -134,7 +144,9 @@ void INTERRUPT_uart4(void)  D_SERVE_uart4// using 2
 	{
 		L0_uart4_IntRIClear(); 				//清除接收中断标志
 		ts_uart[uNum4].t->reg = L0_uartN_get(uNum4);
-		ts_uart[uNum4].tp_handler(ts_uart[uNum4].t);
+		if(ts_uart[uNum4].tp_handler != NULL){
+			ts_uart[uNum4].tp_handler(ts_uart[uNum4].t);
+		}
 	}
 	if(L0_uart4_IntTI())					//如果是U0发送中断
 	{
@@ -152,7 +164,6 @@ void INTERRUPT_uart4(void)  D_SERVE_uart4// using 2
 #if (D_UART4_485_TYPE != TYPE_485_NONE)
 			D_UART4_485_RX() //切换到接收状态
 #endif
-
 		}
 	}
 	//NOP();	NOP();	NOP();

source/msp/UART4.h

@@ -54,8 +54,7 @@ msp/uartx.c    底层代码	 和cpu相关 缓存发送也放在里面
 #define _uart4_H
 
 #include "../bsp/bsp_config.h"
-#include "../tpc/tpc_ccmodbus.h"
+#include "uart_x.h"
-#include "uartN.h"
 
 #define uNum4 3
 

source/tpc/debug.c

@@ -166,6 +166,71 @@ void L1_s2b_rfid (Ts_uart_recv_buf *p) //reentrant
 	}
 }
 
+//485协议：AA 55 00 04 01 10 00 00 15
+//帧头：AA 55
+//数据长度：00 04，后续数据的长度，不包括最后的ocr
+//SlaveId：01
+//Command: 10轮询读取 11设置参数
+//数据：00 00
+//校验：15 从协议长度到数据字段 [00 04 01 10 00 00] 的所有字节的累加和
+void L1_s2b_485 (Ts_uart_recv_buf *p) //reentrant
+{
+	if (0 == p->head)
+	{
+		p->buf[p->index++] = p->reg;
+		if(p->index == 2){
+			if (p->head_0 == p->buf[0] && p->head_1 == p->buf[1])
+			{
+				p->head = 1;
+				p->index = 1;
+				p->num = p->maxnum;
+				p->ocr = 0;
+			}
+			else
+			{
+				p->head = 0;
+				p->ok = 0;
+				p->index = 0;
+			}
+		}
+	}
+	else
+	{
+		p->buf[++p->index] = p->reg;
+		if(p->index == 3)
+		{
+			//2个字节协议头 + 2字节数据长度 + 数据 + 1ocr
+			p->num = 4 + 1 + ((p->buf[2] << 8) | (p->buf[3]));
+			if(p->num > p->maxnum){
+				//error
+				p->head = 0;
+				p->ok = 0;
+				p->index = 0;
+				return;
+			}
+		}
+		if(p->index < p->num - 1)
+		{
+			//计算OCR
+			p->ocr += p->reg;
+		}
+		else if(p->index == p->num - 1)
+		{
+			if(p->ocr == p->buf[p->num-1])
+			{
+				if (p->ok != 1)
+				{	  
+					//命令结束，必须有个地方清0，否则无法再次接受报文
+					p->ok = 1;
+				}
+			}
+			p->head = 0;
+			p->index = 0;
+		}
+	}
+}
+
+
 
 
 /******************************************************************************

source/tpc/debug.h

@@ -68,6 +68,7 @@ typedef struct _tpc_rfid_
 extern void L1_s2b_debug(Ts_uart_recv_buf *p);
 extern void L1_s2b_nfc (Ts_uart_recv_buf *p);
 extern void L1_s2b_rfid (Ts_uart_recv_buf *p);
+extern void L1_s2b_485 (Ts_uart_recv_buf *p);
 extern void L1_s2b_PH1 (Ts_uart_recv_buf *p);// reentrant;
 
 #endif /* end __TPC_DEBUG_H_ */