Steven Kay
This is a driver to control the SD20 20 Channel I2C to Servo Driver Chip from www.robot-electronics.co.uk (http://www.robot-electronics.co.uk/htm/sd20tech.htm). This driver will allow a servo channel to be started up, stopped and the duty cycle altered in standard mode. No attempt to include the extended mode is included.
Diff: SD20.cpp
- Revision:
- 0:870a29ad1074
- Child:
- 1:6557cf755742
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/SD20.cpp Sun Jan 24 14:39:33 2016 +0000
@@ -0,0 +1,57 @@
+#include "mbed.h"
+#include "SD20.h"
+
+SD20::SD20(I2C *bus,int I2CAddress, int BusHz)
+{
+ _bus = bus;
+ deviceAddress = I2CAddress;
+ BusHz = BusHz;
+ _bus -> frequency(BusHz);
+}
+
+int SD20::UpdatePWM(char *DataOutput)
+{
+ if(_bus -> write(deviceAddress,(char*)DataOutput,OUT_BUF_LEN))
+ {
+ printf("I2C Failed to write\r\n");
+ return 1;
+ }
+ else
+ {
+ printf("0x%02x sent to Reg: 0x%02x\r\n",*(DataOutput+1),*DataOutput);
+ return 0;
+ }
+}
+
+int SD20::StartStopPWM(int Channel,bool Start)
+{
+ if(Start == CHANNEL_START)
+ {
+ int DataOutput[] = {Channel,0x01};
+ if(_bus -> write(deviceAddress,(char*)DataOutput,OUT_BUF_LEN))
+ {
+ printf("I2C Failed to write\r\n");
+ return 1;
+ }
+ else
+ {
+ printf("0x%02x sent to Reg: 0x%02x\r\n",*(DataOutput+1),*DataOutput);
+ return 0;
+ }
+ }
+ else
+ {
+ int DataOutput[] = {Channel,0x00};
+ if(_bus -> write(deviceAddress,(char*)DataOutput,OUT_BUF_LEN))
+ {
+ printf("I2C Failed to write\r\n");
+ return 1;
+ }
+ else
+ {
+ printf("0x%02x sent to Reg: 0x%02x\r\n",*(DataOutput+1),*DataOutput);
+ return 0;
+ }
+ }
+}
+