Dual DAC library
Diff: MCP482X.cpp
- Revision:
- 0:b58572ce83b6
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MCP482X.cpp Wed Aug 14 00:21:42 2013 +0000 @@ -0,0 +1,97 @@ +#include "mbed.h" +#include "MCP482X.h" + +using namespace mbed; + +MCP482X::MCP482X(SPI &spi, DigitalOut &cspin): _spi(spi), _cspin(cspin) { + gainA = 1; + gainB = 1; + valA = 0; + valB = 0; + enable(); + _cspin.write(1); +} + +MCP482X::~MCP482X() { +} + +int MCP482X::writeA(int value){ + int tempval = 0; + valA = (value & 0x0FFF); + tempval = SELECTDACA(valA); + + if(gainA == 1) { + tempval = SELECT1XGAIN(tempval); + } else { + tempval = SELECT2XGAIN(tempval); + } + + if(bshutdown==true) { + tempval = SELECTPWROFF(tempval); + } else { + tempval = SELECTPWRON(tempval); + } + + sendValue(tempval); + return tempval; +} + +int MCP482X::writeB(int value){ + + int tempval = 0; + valB = (value & 0x0FFF); + tempval = SELECTDACB(valB); + + if(gainB == 1) { + tempval = SELECT1XGAIN(tempval); + } else { + tempval = SELECT2XGAIN(tempval); + } + + if(bshutdown==true) { + tempval = SELECTPWROFF(tempval); + } else { + tempval = SELECTPWRON(tempval); + } + + sendValue(tempval); + return tempval; +} + +void MCP482X::setGainA(int value){ + if(value==1 || value == 2) + gainA = value; + else + gainA = 1; +} + +void MCP482X::setGainB(int value){ + if(value==1 || value == 2) + gainB = value; + else + gainB = 1; +} + +void MCP482X::disable() { + bshutdown = true; + writeA(valA); + writeB(valB); +} + +void MCP482X::enable() { + bshutdown = false; + writeA(valA); + writeB(valB); +} + +void MCP482X::configspi() { + _spi.format(16, 0); + _spi.frequency(50000); +} + +void MCP482X::sendValue(int value) { + configspi(); + _cspin.write(0); + _spi.write(value); + _cspin.write(1); +} \ No newline at end of file