Comments on: 05 Inputs and Outputs http://www.engscope.com An Engineer's Life Sat, 04 Feb 2012 14:03:12 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Tou http://www.engscope.com/pic24-tutorial/5-inputs-and-outputs/comment-page-1/#comment-42225 Tou Wed, 02 Nov 2011 07:32:10 +0000 http://www.engscope.com/pic24-tutorial/5-inputs-and-outputs/#comment-42225 By far this section has connected a lot of the dots together for me. Thanks. By far this section has connected a lot of the dots together for me.

Thanks.

]]> By: Gerhard http://www.engscope.com/pic24-tutorial/5-inputs-and-outputs/comment-page-1/#comment-40404 Gerhard Mon, 03 Oct 2011 17:43:11 +0000 http://www.engscope.com/pic24-tutorial/5-inputs-and-outputs/#comment-40404 Thankyou!! Thankyou!!

]]> By: jliu83 http://www.engscope.com/pic24-tutorial/5-inputs-and-outputs/comment-page-1/#comment-40307 jliu83 Sun, 02 Oct 2011 09:34:24 +0000 http://www.engscope.com/pic24-tutorial/5-inputs-and-outputs/#comment-40307 @Gerhard. The way to use the struct for RPORx is to use the RPORxbits symbol. So in your example, it would be RPOR6bits.RP12R = 0x12. However, there are several things in terms of logic that doesn't quite add up (code should compile). You are using the pins in analog mode, however, you are also using the same pins as an output compare. I don't know which function will take precedence, but it is not good practice. I believe the output compare function is a digital function and so your AD1PCFGL should be set to 0xFFFF. Regards, -J @Gerhard. The way to use the struct for RPORx is to use the RPORxbits symbol. So in your example, it would be RPOR6bits.RP12R = 0×12.

However, there are several things in terms of logic that doesn’t quite add up (code should compile). You are using the pins in analog mode, however, you are also using the same pins as an output compare. I don’t know which function will take precedence, but it is not good practice. I believe the output compare function is a digital function and so your AD1PCFGL should be set to 0xFFFF.

Regards,
-J

]]> By: Gerhard http://www.engscope.com/pic24-tutorial/5-inputs-and-outputs/comment-page-1/#comment-40303 Gerhard Sun, 02 Oct 2011 09:13:29 +0000 http://www.engscope.com/pic24-tutorial/5-inputs-and-outputs/#comment-40303 Thanks for comming back so quickly. Here is more code: //main loop int main(void) { //Set up Clock OSCCON = 0x0894; //Set FRC at 8 MHZ OSCTUN = 0x0000; //fine tune to 8 MHZ CLKDIV = 0x0003; //no division //Set up I/O pin AD1PCFGL = 0x0000; // Set all pins as analog AN0 to AN12 TRISB = 0xEFFF; // Set all Port B pins as inputs except pin RB12 as output //Set up PPS (Peripheral Pin Select)for ADC //RPOR6.RP12R = 18; // Set Pin 23 RP 12 as output compare 1 //Set up PWM //Loop forever while(1) { } } Thanks for comming back so quickly. Here is more code:

//main loop

int main(void)
{
//Set up Clock

OSCCON = 0×0894; //Set FRC at 8 MHZ
OSCTUN = 0×0000; //fine tune to 8 MHZ
CLKDIV = 0×0003; //no division

//Set up I/O pin

AD1PCFGL = 0×0000; // Set all pins as analog AN0 to AN12
TRISB = 0xEFFF; // Set all Port B pins as inputs except pin RB12 as output

//Set up PPS (Peripheral Pin Select)for ADC

//RPOR6.RP12R = 18; // Set Pin 23 RP 12 as output compare 1

//Set up PWM

//Loop forever
while(1)
{
}
}

]]> By: jliu83 http://www.engscope.com/pic24-tutorial/5-inputs-and-outputs/comment-page-1/#comment-40281 jliu83 Sun, 02 Oct 2011 01:05:43 +0000 http://www.engscope.com/pic24-tutorial/5-inputs-and-outputs/#comment-40281 @Gerhard. Can I see some more code showing how that line of code is used? Did you include the p24FJ64GA102.h file? -J @Gerhard. Can I see some more code showing how that line of code is used? Did you include the p24FJ64GA102.h file?

-J

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