新建项目

middleware/modbus/modbus-m.c

@@ -0,0 +1,33 @@
+/* modbus 主机实现*/
+
+#include<stdint.h>
+#include "crc.h"
+
+
+//static uint8_t  s_tx_buffer[512];
+//static uint16_t s_tx_length;
+//static uint8_t rx_buffer[512];
+
+
+
+// 读取保持寄存器的值
+// addr  寄存器地址
+// id 丛机地址
+// length 读取丛机数据长度
+int modbus_m_read_regist(uint8_t id,uint16_t addr,uint16_t length,uint8_t * data)
+{
+	uint16_t index = 0,crc;
+	data[index++] = id;
+	data[index++] = 0x03;
+	data[index++] = (addr >> 8) & 0x00FF;
+	data[index++] = addr & 0x00FF;
+	data[index++] = (length >> 8) & 0x00FF;
+	data[index++] = length & 0x00FF;
+	crc = MX_CRC_CALC(data,index);
+	data[index++] =  crc & 0x00FF;
+	data[index++] = (crc >> 8) & 0x00FF;
+	return index;
+}
+
+
+

middleware/modbus/modbus-m.h

@@ -0,0 +1,8 @@
+#ifndef MODBUS_M_H
+#define MODBUS_M_H
+#include <stdint.h>
+
+
+int modbus_m_read_regist(uint8_t id,uint16_t addr,uint16_t length,uint8_t * data);
+
+#endif 

middleware/modbus/modbus-mp.c

@@ -0,0 +1,22 @@
+/* modbus 主机实现*/
+
+#include<stdint.h>
+
+
+static uint8_t  s_tx_buffer[512];
+static uint16_t s_tx_length;
+static uint8_t rx_buffer[512];
+
+
+
+// 读取保持寄存器的值
+// addr  寄存器地址
+// id 丛机地址
+// length 读取丛机数据长度
+int modbus_m_read_regist(uint8_t id,uint16_t addr,uint16_t length)
+{
+	
+}
+
+
+