akuma6099 / mcp47feb

Arduino Library for the MCP47FEB22 DAC by Microchip

MCP47FEB

Arduino Library for the MCP47FEB22 DAC by Microchip

This is a work in progress of migrating an existing library created by Neuroelec for the MCP4728 DAC. MCP4728: https://code.google.com/archive/p/neuroelec/downloads

Made minor code corrections as well as re-implemented reading and writing routines due to some differences in registers and memory maps. Had to bit-shift, and/or alot...

The MCP47FEB22 is a 12-Bit Dual channel DAC controlled via I2C. -Has Non-Vol storage to retain outputs, gain, and powerdown states. -3 Selectable Vref Sources (VDD, Ext VRef pin, or Internal Band-Gap 1.22v) -Setting time of 6us. -Output gain -POR/BOR

Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/20005375A.pdf

mcp47feb's Issues

A Wire.requestFrom() should not be followed by Wire.endTransmission().

You may remove all the Wire.endTransmission() after a Wire.requestFrom().
Explanation: Common-mistakes#2

unable to use DAC

First thanks for creating this library!

I am using a MCP47FEB22 for a DAC output, but I cannot set the values using the lib functions, here's my code, can you tell me where is the problem?

#include <mcp47FEB22.h>
#include <Wire.h>

mcp47FEB22 mcp47(0);

void setup() {
Serial.begin(9600);
mcp47.begin();
uint16_t a = 200;
uint16_t b = 0;

mcp47.analogWrite(a,b);

}

void loop() {
// put your main code here, to run repeatedly:

}

undefined reference to `makeWord(unsigned short)'

Back in 2019 I could this library very well with adafruit NRF board. Now I have switched to ESP32-WROOM board. getting this error. Not sure if Arduino have updated internal codes or something.

basically something is wrong with makeWord function. Any suggestion?

Here is the error:

libraries\MCP47FEB-master\mcp47FEB22.cpp.o:(.literal._ZN10mcp47FEB2211analogWriteEtt+0x0): undefined reference to makeWord(unsigned short)' libraries\MCP47FEB-master\mcp47FEB22.cpp.o: In function mcp47FEB22::fastWrite(unsigned char, unsigned short)':
C:\Users\attari\Documents\Arduino\libraries\MCP47FEB-master/mcp47FEB22.cpp:259: undefined reference to makeWord(unsigned short)' libraries\MCP47FEB-master\mcp47FEB22.cpp.o: In function mcp47FEB22::analogWrite(unsigned short, unsigned short)':
C:\Users\attari\Documents\Arduino\libraries\MCP47FEB-master/mcp47FEB22.cpp:259: undefined reference to `makeWord(unsigned short)'
collect2.exe: error: ld returned 1 exit status
exit status 1
Error compiling for board Adafruit ESP32 Feather.

Thanks