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I2C MD25 motor driver board

Topic last updated 14 Mar 2011, by Sam Wane. 1 reply
Andrew Mackintosh
11 Nov 2010 . Edited: 13 Nov 2010

Has anyone used the I2C to drive the MD25 motor driver board? http://www.robot-electronics.co.uk/htm/md25tech.htm

Sam Wane
14 Mar 2011

Yes, I have. My demo code is pasted below:

  1. include "mbed.h" 100kHz clock, addr B0, reg 0=speedl, 1=speedr (0 (Full Reverse) 128 (Stop) 255 (Full Forward). 15=mode (set to 0 default)

Serial pc(USBTX, USBRX); I2C i2c(p9, p10); Dont forget the 2.5 k pullup on both wires! int main() { Read from I2C slave at address 0x62

int address = 0xB0,addressr=0xB1; char data[2],data2[2],data3[2],indata[20],reg[2];

data[0]=0x00;data[1]=140; top of board with power at top, above 128 set anticlockwise data2[0]=0x01;data2[1]=140; lower motor, above 128 set clockwise pc.printf("Connected\n"); data3[0]=16;data3[1]=0x20; i2c.write( address, data3, 2, false ) ;Reset encoders while(1){ i2c.write( address, data, 2, false ) ; i2c.write( address, data2, 2, false ) ; wait(0.1);

wait(1); reg[0]=0; i2c.write(address,reg,1,false); i2c.read(addressr, indata, 17); Reads encoder of motor 2 from register pc.printf("%d %d\n\r",indata[9]+indata[8]*256+indata[7]*65536,indata[11]); wait(1);

} }