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Driver for LTC1298 A/D Converter
/*****************************************************************************
* *
* Driver for LTC1298 A/D Converter *
* *
* adc_init() Call after power up *
* *
* value = read_analog( channel ) Read a analog channel *
* channel is 0 or 1 *
* *
* convert_to_volts( value, string ) Fills in string with *
* the true voltage in *
* the form 0.000 *
* *
* (C) Copyright 1996,1997 Custom Computer Services *
* *
*****************************************************************************/
#ifndef ADC_CS
#define ADC_CLK PIN_B0
#define ADC_DOUT PIN_B1
#define ADC_DIN PIN_B2
#define ADC_CS PIN_B3
#endif
void adc_init() {
output_high(ADC_CS);
}
void write_adc_byte(byte data_byte, byte number_of_bits) {
byte i;
delay_us(2);
for(i=0; i>1;
output_high(ADC_CLK);
delay_us(50);
output_low(ADC_CLK);
delay_us(50);
}
}
byte read_adc_byte(byte number_of_bits) {
byte i,data;
data=0;
for(i=0;i
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