PIC32MZ ADC (garbage data)

[KriszAime]

Hi!

I would like to use ADC1 in my PIC32MZ1024ECG.
This is my source code:

Code: Select all

void main() {

	//ANS 
	ANSELF.RF0 = 0; //digi
	ANSELF.RF1 = 0; //digi

	ANSELE.RE8 = 1; //analog (AN25)

	//TRIS
	TRISF.RF0 = 1;
	TRISF.RF1 = 0;

	TRISE.RE8 = 1; //an input

	//Uart settings
	Unlock_IOLOCK();

	PPS_Mapping_NoLock(_RPF0, _OUTPUT, _U1TX); //Uart1(RPF0 - U1TX)
	PPS_Mapping_NoLock(_RPF1, _INPUT, _U1RX); //Uart1(RPF1 - U1RX)

	Lock_IOLOCK();

	//end

	//inits
	ADC1_Init();
	UART1_Init(115200);
	delay_ms(100);

	while (1)
	{
		if (UART1_Data_Ready())
		{
			char a[230];
			if (UART1_Read() == 'k')
			{
				//unsigned int i = (unsigned int)ADC1_Read(25);
				sprintf(a, "%u\r\n", ADC1_Read(25));
				UART1_Write_Text(a);
			}

		}
	}

	return;
}

The Uart workd fine, but i get Garbage data, or we could say that the value changes even if the analog value is unchanged. for example, once '63' and then '3065' then '1536' then '0' then '576' etc ..

The value returned should represent the measured value, not random values.

Maybe I missed something?

[marcus]

The ADC on the PIC32MZ EC is broken. Use the EF instead

[jovana.medakovic]

Hello,

Thank you @marcus for the answer.

@KriszAime
Unfortunately, @marcus is right.
In the attachment, you can find an example for PIC32MZ2048EFH144.
Also, there you can find .emcl file which you have to put in the folder where your compiler is installed on the path:
\Mikroelektronika\mikroC PRO for PIC32\Uses

Kind regards,
Jovana