ADC1BUFx Undeclared Error in dspic33f programming

[Honey15]

Hello everyone,

I need some help with the ADC configuration of the dspic33fj128mc804 . I'm trying to configure ADC for 8 analog inputs such that they are sampled by one S&H channel CH0 (As given in 16.10.2 of data sheet). The problem I'm having is that when I try to read the result ADC1BUF1 ,ADC1BUF2..... ADC1BUF7, the program doesn't builds and the error shown is that all these buffers are undeclared.

Could anyone please help me with this? Any feedback is much appreciated!!

Many Thanks.

void initadc(void)
{
AD1PCFGL =0xff00;
AD1CSSL=0x00ff;
AD1CHS0=0;
AD1CON4=0;
AD1CON3=0x8001;
AD1CON2=0x0420;
AD1CON1=0x8406;// ASAM=1, SIMSAM=0
}


void __attribute__((auto_psv)) _AD1Interrupt(void)
{

adResults[0]=ADC1BUF1;//save
adResults[1]=ADC1BUF1;
adResults[2]=ADC1BUF2;
adResults[3]=ADC1BUF3;
adResults[4]=ADC1BUF4;
adResults[5]=ADC1BUF5;
adResults[6]=ADC1BUF6;
adResults[7]=ADC1BUF7;
shouldWriteResults =1;//set flag.

}

 

[NorthGuy]

Look at the dspic33fj128mc804.h file. They might be declared not as you think.

 

[nsaspook]

It's an ADC with DMA chip with only one buffer. Using DMA is a much better solution (lower overhead) than manually moving chip buffers to application memory as sample speeds increase.

https://ww1.microchip.com/downloads/en/DeviceDoc/70182A.pdf

 

[Honey15]

Thanks much nsaspook, I understand it now !!

 

[nsaspook]