Michael Shimniok / ADC128S

Driver for National Semiconductor ADC128Sxxx family of analog to digital converters

ADC128S.cpp@3:e304ec6ed416, 2011-04-27 (annotated)

Committer:
shimniok
Date:
Wed Apr 27 19:36:50 2011 +0000
Revision:
3:e304ec6ed416
Parent:
2:f6c4a79f2ee0 
Fixed compile time errors.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shimniok 0:28addf1f4c26 1 // ADC128S a library for the National Semiconductor ADC128S family of ADCs
shimniok 0:28addf1f4c26 2 //
shimniok 0:28addf1f4c26 3 // by Michael Shimniok - http://www.bot-thoughts.com/
shimniok 0:28addf1f4c26 4 //
shimniok 0:28addf1f4c26 5 #include "mbed.h"
shimniok 0:28addf1f4c26 6 #include "ADC128S.h"
shimniok 0:28addf1f4c26 7
shimniok 2:f6c4a79f2ee0 8 ADC128S::ADC128S(PinName mosi, PinName miso, PinName sck, PinName cs) : _adc(mosi, miso, sck), _cs(cs), _channel(0) {
shimniok 0:28addf1f4c26 9 _adc.format(16,3);
shimniok 0:28addf1f4c26 10 _adc.frequency(8000000);
shimniok 0:28addf1f4c26 11 }
shimniok 0:28addf1f4c26 12
shimniok 2:f6c4a79f2ee0 13 int ADC128S::getChannel() {
shimniok 2:f6c4a79f2ee0 14 return _channel;
shimniok 2:f6c4a79f2ee0 15 }
shimniok 2:f6c4a79f2ee0 16
shimniok 2:f6c4a79f2ee0 17 void ADC128S::setChannel(int channel) {
shimniok 2:f6c4a79f2ee0 18 _cs = 0;
shimniok 2:f6c4a79f2ee0 19 _adc.write(channel<<11); // send channel for next acquisition; XXXAAAXX XXXXXXXX
shimniok 2:f6c4a79f2ee0 20 _adc.write(channel<<11); // send channel for next acquisition; XXXAAAXX XXXXXXXX
shimniok 2:f6c4a79f2ee0 21 _cs = 1;
shimniok 2:f6c4a79f2ee0 22 _channel = channel;
shimniok 2:f6c4a79f2ee0 23 }
shimniok 2:f6c4a79f2ee0 24
shimniok 2:f6c4a79f2ee0 25 unsigned int ADC128S::read() {
shimniok 2:f6c4a79f2ee0 26 unsigned int result = 0;
shimniok 2:f6c4a79f2ee0 27 _cs = 0;
shimniok 2:f6c4a79f2ee0 28 // get next acquisition, send next channel: XXXAAAXX XXXXXXXX
shimniok 2:f6c4a79f2ee0 29 _channel++;
shimniok 2:f6c4a79f2ee0 30 _channel %= 8;
shimniok 2:f6c4a79f2ee0 31 result = _adc.write(_channel<<11);
shimniok 2:f6c4a79f2ee0 32 _cs = 1;
shimniok 2:f6c4a79f2ee0 33
shimniok 2:f6c4a79f2ee0 34 return result;
shimniok 2:f6c4a79f2ee0 35 }
shimniok 2:f6c4a79f2ee0 36
shimniok 0:28addf1f4c26 37 unsigned int ADC128S::read(int channel) {
shimniok 0:28addf1f4c26 38 unsigned int result = 0;
shimniok 0:28addf1f4c26 39 _cs = 0;
shimniok 0:28addf1f4c26 40 _adc.write(channel<<11); // send channel for next acquisition; XXXAAAXX XXXXXXXX
shimniok 2:f6c4a79f2ee0 41 _cs = 1;
shimniok 2:f6c4a79f2ee0 42 wait_us(50);
shimniok 2:f6c4a79f2ee0 43 _cs = 0;
shimniok 0:28addf1f4c26 44 result = _adc.write(channel<<11); // get next acquisition
shimniok 0:28addf1f4c26 45 _cs = 1;
shimniok 0:28addf1f4c26 46
shimniok 0:28addf1f4c26 47 return result;
shimniok 2:f6c4a79f2ee0 48 }