main.cpp

00001   #include "mbed.h" 
00002   #include <RS485.h>
00003   Serial pc(USBTX, USBRX); 
00004   RS485 RS485(p13,p14,p15); // Tx, Rx , !RE and DE MAX485 pin
00005  
00006   DigitalOut ho(p15); // this pin should be connected to !RE and DE
00007   typedef uint8_t byte;
00008  
00009   byte regvalue[9];
00010   //byte data[9] = {0x01,0x04,0x00,0x48,0x00,0x02,0xf1,0xdd};//your data
00011   byte data[9] = {0x02,0x05,0x01,0x49,0x01,0x03,0xf2,0xde};//your data
00012   int main()
00013   {
00014     pc.baud(115200);   
00015     pc.printf("main\n");
00016     while(1) {
00017        pc.printf("Starting\n");
00018        ho = 1;                  // Enable sending on MAX485
00019        RS485.sendMsg(data,sizeof(data));
00020        wait_ms(600);            // Must wait for all the data to be sent   
00021        ho = 0;                  // Enable receiving on MAX485
00022        pc.printf("Getting data\n");
00023        if(RS485.readable() >0){
00024            memset(regvalue,0,sizeof(regvalue));
00025            wait_ms(200);
00026            RS485.recvMsg(regvalue,sizeof(data),500);
00027            wait_ms(200);
00028            for (int count = 0; count < 9; count++) {
00029                pc.printf("%X - ", regvalue[count]);
00030            }
00031        }else printf("No Data\n");
00032        printf("Done\n");
00033        wait_ms(1000);
00034     }
00035   }