4-20ma / i2c_adc_ads7828 Goto Github PK

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Hi,

I have been working with the 7828 for about a month. I have it operational and have been using code within GitHub (specifically this set of libs) and have trouble incrementing the address for successive voltage reads.

Here is the init.

#include <Wire.h>
#include <ADS7828.h>
#include <time.h>

ADS7828 adc(0x48);

And then the value should be incremented from 0x48 to 0x49 (below), however, this does not work! Can anyone please send a pointer for me ????

CTC911CTC

//Process Votages
int x;
time_t rawtime;
unsigned int read_value = 0;
adc.init(0x49);
for( int y = 0; y < 1; y++){

Serial.print ("Time=");
Serial.println (time(0));
for(int x = 0; x < 8; x++){ // Loops from 0 to 7
read_value = adc.read(x, SD); // Read value of ADC channel x (0 to 7) in Single-ended mode

This function needs a return

This seems to work properly.

i2c_adc_ads7828.h header file already has #include <Wire.h>; remove from example sketches.

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• i2c_adc_ads7828.cpp
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  • i2c_adc_ads7828.cpp
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Hello,

I would like to change the sampling frequency. For example, I would like to use the maximum frequency of 50khz per input of the ADC.

Thank you

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Optimization in Arduino code create reverse order of reading 16 bits values as two 8 bits value (like Big/Little Endian error)

Need a temp value to correct this order

// ___________________________________________ STATIC PRIVATE MEMBER FUNCTIONS
/// Request and receive data from most-recent A/D conversion from device.
/// \param address device address (0..3)
/// \return 16-bit zero-padded word (12 data bits D11..D0)
uint16_t ADS7828::read(uint8_t address)
{
uint8_t tempa;
Wire.requestFrom(BASE_ADDRESS_ | (address & 0x03), 2);
tempa = Wire.read();
return word(tempa, Wire.read());
// return word(Wire.read(), Wire.read()); // doesn't work on some configuration
}

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