Basic I/O Shield with Max32 board

Created Wed, 11 Jan 2012 10:50:23 +0000 by Leena

Leena

Wed, 11 Jan 2012 10:50:23 +0000

am trying to turn on all of the LEDs in the basic io shield with max32 board, as mentioned in the basic I/O shield refrence manual

max32 pin# LED 77 LD1 76 LD2 75 LD3 74 LD4 73 LD5 72 LD6 71 LD7 70 LD8

i tried to follow max32 schematic documentation to turn on these LEDs but it didnt work for me!

#pragma config FPLLMUL = MUL_20, FPLLIDIV = DIV_2, FPLLODIV = DIV_1, FWDTEN = OFF
#pragma config POSCMOD = HS, FNOSC = PRIPLL, FPBDIV = DIV_1

#define SYS_FREQ 	(80000000L)

#define BAUDRATE   	(9600)      //The desired BaudRate

#define DELAY 36000 //256ms

void testLEDs()
{
	// initialization
	TRISD = 0x0; // all PORTD as output
	AD1PCFG=0xFFFF;
	T1CON = 0x8030; // 1000 0000 0011 0000 TMR1 on, prescale 1:256 
	PR1 = 0XFFFF; // set period register to max
	while(1)
	{
		PORTD = 0xFFFF;

		TMR1 = 0;
		while ( TMR1 < DELAY)
		{
			// WAIT
		}

		PORTD = 0;
		TMR1 = 0;
		while ( TMR1 < DELAY)
		{
			// WAIT
		}

	}
}

this method it turn ON LD8,LD7 and LD5 how can i test the rest of the LEDs i have tried to turn on some of the bins on portA and portC according to the chipkit schematic design but still it is not working;

Leena

Wed, 11 Jan 2012 11:59:56 +0000

i have been able to turn on all of the LEDs on the IO shield except LD6 (after disabling the JTAG)!

any idea how can i turn on LD6 on the basic IO shield ?

Ryan K

Wed, 15 Feb 2012 23:22:57 +0000

Hello,

I assume you have the Basic I/O Shield directly plugged into the Max32 board. Please try the following code. I just added the LD6 to the blink demo:

/*
  Blink
  Turns on an LED on for one second, then off for one second, repeatedly.
 
  This example code is in the public domain.
 */

void setup() {                
  // initialize the digital pin as an output.
  // Pin 13 has an LED connected on most Arduino boards:
  pinMode(13, OUTPUT);   
  TRISCCLR = (1 << 13);
}

void loop() {
  PORTCSET = (1 << 13);
  digitalWrite(13, HIGH);   // set the LED on
  delay(1000);              // wait for a second
  PORTCCLR = (1 << 13);
  digitalWrite(13, LOW);    // set the LED off
  delay(1000);              // wait for a second
}

Let me know if this works or not.

Best Regards, Ryan K

kciszewski

Sun, 18 Mar 2012 00:17:10 +0000

Leena--how dd you turn off the JTAG?