Diff: embedded/ADC.cpp

Revision:

0:08606a13a816

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/embedded/ADC.cpp	Thu Jun 02 05:04:57 2016 +0000
@@ -0,0 +1,50 @@
+#include "ADC.h"
+
+ADS8556::ADS8556(SPI *spi, PinName cs, PinName reset, PinName convst,
+		PinName busy) :
+		_spi(spi), _cs(DigitalOut(cs)), _reset(DigitalOut(reset)), _convst(
+				DigitalOut(convst)), _busy(DigitalIn(busy)) {
+	_convst = 0;
+	_reset = 0;
+	_cs = 1;
+	_spi->format(16, 2);
+	_spi->frequency(10000000);
+	_reset = 1;
+	wait_ns(50);
+	_reset = 0;
+
+}
+
+void ADS8556::adc(int16_t* data) {
+
+_convst = 1;
+wait_ns(20);
+while (_busy != 0)
+;
+_cs = 0;
+wait_ns(5);
+uint8_t i;
+for (i = 0; i < 6; i++) {
+*data++ = _spi->write(0x0000);
+}
+_cs = 1;
+_convst = 0;
+
+}
+
+double toVoltage(int16_t adValue) {
+	return ((adValue + 32768) * 20.232 / 65535 - 10.116) / 1.01;
+}
+
+double ADS8556::get(int16_t* data, uint16_t channel, uint16_t num) {
+		double d = toVoltage(*(data + ((num * 6) + channel)));
+		return d;
+}
+
+double ADS8556::get2(int16_t* data, uint16_t channel, uint16_t num) {
+		int16_t d = *(data + ((num * 6) + channel));
+		return d;
+}
+
+
+