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update mcp4725 to print the object if logging turned on. And updates… #163

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Merged
taartspi merged 1 commit into from
Sep 11, 2026
Merged

update mcp4725 to print the object if logging turned on. And updates… #163

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108 changes: 48 additions & 60 deletions src/main/java/com/pi4j/devices/mcp4725/MCP4725App.java
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Original file line number Diff line number Diff line change
Expand Up @@ -6,13 +6,19 @@
import com.pi4j.context.Context;
import com.pi4j.drivers.io.da.mcp472x.Mcp4725Driver;
import com.pi4j.io.i2c.I2C;
import com.pi4j.io.i2c.I2CImplementation;
import com.pi4j.util.Console;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


public class MCP4725App {

static void main(String[] args) {
System.setProperty("org.slf4j.simpleLogger.defaultLogLevel", "INFO");
System.setProperty("org.slf4j.simpleLogger.defaultLogLevel", "OFF");

Logger logger = LoggerFactory.getLogger(MCP4725App.class);
logger.trace(">>> Enter: init");

Context pi4j = Pi4J.newAutoContext();

Expand All @@ -29,18 +35,17 @@ static void main(String[] args) {
int address = MCP4725_Declares._MCP4725_DEFAULT_ADDRESS;
boolean doReset = false;
int registerData = 0;
boolean setOutputEEPROM = false;
boolean setOutputFast = false;
double vref = 0;
float eepromVolt = 0;
float fastVolt = 0;
int onlyOne = 0; // numerous parms a mutually exclusive
boolean setOutputDigital = false;
boolean setOutputVoltage = false;
boolean persistValues = false;

String helpString = " parms: -b 0x? hex value bus -a 0x?? hex value address \n " +
" -r reset chip -rde update DAC and EEPROM \n" +
" -ev eeprom voltage -fv fast voltage \n" +
" -rdf DAC value update fast -vref decimal reference voltage\n " +
"-rde -ev -fv -rdf mutually exclusive" ;
" -r reset chip -pv true/false persist values \n" +
" -v voltage -d DAC digital value -vref float reference voltage\n " +
"-d -v mutually exclusive" ;

for (int i = 0; i < args.length; i++) {
String o = args[i];
Expand All @@ -58,40 +63,30 @@ static void main(String[] args) {
vref = Float.parseFloat(a);
} else if (o.contentEquals("-r")) {
doReset = true;
} else if (o.contentEquals("-rde")) {
} else if (o.contentEquals("-d")) {
String a = args[i + 1];
i++;
registerData = Integer.parseInt(a);
setOutputEEPROM = true;
setOutputDigital = true;
if (registerData < 0 || registerData > 4095) {
console.println("-rde must be in range 0..4095");
console.println("-d must be in range 0..4095");
System.exit(36);
}
onlyOne ++;
} else if (o.contentEquals("-rdf")) {
String a = args[i + 1];
i++;
setOutputFast = true;
registerData = Integer.parseInt(a);
if (registerData < 0 || registerData > 4095) {
console.println("-rdf must be in range 0..4095");
System.exit(37);
}
onlyOne ++;
} else if (o.contentEquals("-h")) {
console.println(helpString);
System.exit(39);
} else if (o.contentEquals("-ev")) { // eeprom volts
} else if (o.contentEquals("-v")) { // eeprom volts
String a = args[i + 1];
i++;
setOutputVoltage = true;
eepromVolt = Float.parseFloat(a);
onlyOne ++;
} else if (o.contentEquals("-fv")) { // fast volts
String a = args[i + 1];
i++;
fastVolt = Float.parseFloat(a);
onlyOne ++;
} else {
}else if (o.contentEquals("-pv")) {
String a = args[i + 1];
persistValues = Boolean.parseBoolean(a);
i++;
} else {
console.println(" !!! Invalid Parm " + args);
console.println(helpString);
System.exit(42);
Expand All @@ -110,54 +105,35 @@ static void main(String[] args) {

}
if ( (eepromVolt > vref) || (eepromVolt < 0) ) {
console.println("-ev greater than -vref, or less than zero");
console.println("-v greater than -vref, or less than zero");
System.exit(51);

}

if ( (fastVolt > vref) || (fastVolt < 0) ) {
console.println("-ef greater than -vref, or less than zero");
System.exit(51);

}

Mcp4725Driver dacChip ;
I2C genCallDevice = null ;
I2C i2cDev = createI2cDevice("MCP4725", busNum, address, pi4j) ;
I2C i2cDev = createI2cDevice("MCP4725", busNum, address, I2CImplementation.DIRECT, pi4j) ;
dacChip = new Mcp4725Driver( i2cDev, vref);

if (doReset) {
genCallDevice = createI2cDevice("GenCallReset", busNum,0x00, pi4j);
genCallDevice = createI2cDevice("GenCallReset", busNum,0x00, I2CImplementation.SMBUS, pi4j);
dacChip.resetChip(genCallDevice);
}

if (setOutputEEPROM) {
dacChip.setEepromEnabled(true);
try {
dacChip.setDigitalValue(registerData);
} catch (Exception e) {
console.println("Error occurred setting DAC output via register value failed. \n Exception " + e.getMessage());
}
dacChip.setEepromEnabled(false);
}
if (setOutputFast) {
logger.info("\nBefore state : \n" + dacChip);

dacChip.setEepromEnabled(persistValues);

if (setOutputDigital) {
dacChip.setDigitalValue(registerData);
}

if (eepromVolt > 0) {
dacChip.setEepromEnabled(true);
try {
dacChip.setVoltage(0, eepromVolt);
} catch (Exception e) {
console.println("Error occurred setting DAC output via target voltage failed. \n Exception " + e.getMessage());
}
dacChip.setEepromEnabled(false);
if (setOutputVoltage) {
dacChip.setVoltage(0, eepromVolt);
}

logger.info("\nCompletion state : \n" + dacChip);

if (fastVolt > 0) {
dacChip.setVoltage(fastVolt);
}


if (genCallDevice != null) {
Expand All @@ -170,20 +146,32 @@ static void main(String[] args) {

}

static I2C createI2cDevice( String chipType, int bus, int address, Context pi4j) {


/**
*
* @param chipType String Part numer
* @param bus INT
* @param address INT
* @param pi4j Context
* @return I2C device
*/
static I2C createI2cDevice(String chipType, int bus, int address, I2CImplementation impType, Context pi4j) {
String id = String.format("0X%02x: ", bus);
String name = String.format("0X%02x: ", address);
var i2cDeviceConfig = I2C.newConfigBuilder(pi4j)
.bus(bus)
.device(address)
.id("" + chipType + id + " " + name)
.id(chipType + id + " " + name)
.name(name)
.i2cImplementation(impType)
.build();

return pi4j.create(i2cDeviceConfig);


}


}

33 changes: 21 additions & 12 deletions src/main/java/com/pi4j/devices/mcp4725/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -21,34 +21,43 @@ Pi Grnd A0

https://datasheetspdf.com/pdf-file/634126/MicrochipTechnology/MCP4725/1

-rde anf -rdf both have max input value 0x0FFF

-ef and -ev cannot exceed -vref

-vref option: the -d feature will display calculated output voltage.
-b 0x? hex value bus
-a 0x?? hex value address
-vref float reference voltage
-pv true/false. Persist values, default false.
-r reset chip
-d digital input 0 - 4095
-v voltage 0 - vref

Note -v -d mutually exclusive

-v cannot exceed -vref


Updates using raw binary value
To Update DAC and EEPROM, set to 50 % of reference voltage Vin of 3.3 volts
To Update DAC and EEPROM, set to 50 % of reference voltage 1.6v Vin of 3.3 volts
sudo ./runMcp4725.sh -b 0x01 -a 0x62 -d 2047 -vref 3.3 -pv true

sudo ./runMcp4725.sh -b 0x01 -a 0x62 -rde 2047 -vref 3.3
To Update DAC Fast, set to 100 % of reference voltage
sudo ./runMcp4725.sh -b 0x01 -a 0x62 -d 4095 -r -vref 3.3 -pv false

To Update DAC Fast, set to 50 % of reference voltage
sudo ./runMcp4725.sh -b 0x01 -a 0x62 -rdf 2047 -vref 3.3
sudo ./runMcp4725.sh -b 0x01 -a 0x62 -d 2047 -vref 3.3 -pv false


To Update DAC Fast, set to 100 % of reference voltage
sudo ./runMcp4725.sh -b 0x01 -a 0x62 -rdf 4095 -r -vref 3.3

Updates using voltage value

To Update DAC Fast, set to 1.8v of reference voltage
sudo ./runMcp4725.sh -b 0x01 -a 0x62 -fv 1.8 -vref 3.3
sudo ./runMcp4725.sh -b 0x01 -a 0x62 -v 1.8 -vref 3.3 -pv false

To Update DAC and EEPROM, set to 3.3v
sudo ./runMcp4725.sh -b 0x01 -a 0x62 -ev 3.3 -vref 3.3
sudo ./runMcp4725.sh -b 0x01 -a 0x62 -v 3.3 -vref 3.3 -pv true

To Update DAC Fast, reset chip, set to 3.1
sudo ./runMcp4725.sh -b 0x01 -a 0x62 -ev 3.1 -r -vref 3.3
To Update DAC Fast, reset chip, set to 1.8
sudo ./runMcp4725.sh -b 0x01 -a 0x62 -v 1.8 -r -vref 3.3 -pv false



Expand Down
2 changes: 1 addition & 1 deletion src/main/java/com/pi4j/devices/mcp4728/MCP4728App.java
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Original file line number Diff line number Diff line change
Expand Up @@ -41,7 +41,7 @@
public class MCP4728App {

static void main(String[] args) {
System.setProperty("org.slf4j.simpleLogger.defaultLogLevel", "INFO");
System.setProperty("org.slf4j.simpleLogger.defaultLogLevel", "OFF");
Logger logger = LoggerFactory.getLogger(MCP4728App.class);
logger.trace(">>> Enter: init");

Expand Down
4 changes: 2 additions & 2 deletions src/main/java/com/pi4j/devices/mcp4728/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -44,9 +44,9 @@ String helpString = " parms: -b 0x? hex value bus -a 0x?? hex value address

https://datasheetspdf.com/pdf-file/634126/MicrochipTechnology/MCP4728/1

-rde anf -rdf both have max input value 0x0FFF
-d haa max input value 0x0FFF

-ef and -ev cannot exceed -vdd
-v cannot exceed -vdd



Expand Down
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