Nmae of the CS pin in bare metal programming

[Shekhar]

Hello,

I'm using 3.2 on Ubuntu 16.04 without the Arduino IDE as explained at
http://blogs.omnicron.com/ford/2015/06/17/easy-teensy-development-on-ubuntu/

The following test program is included

#include  "common.h"

#define  LED_ON		GPIOC_PSOR=(1<<5)
#define  LED_OFF	GPIOC_PCOR=(1<<5)


int  main(void)
{
	volatile uint32_t			n;
	uint32_t					v;
	uint8_t						mask;

	PORTC_PCR5 = PORT_PCR_MUX(0x1); // LED is on PC5 (pin 13), config as GPIO (alt = 1)
	GPIOC_PDDR = (1<<5);			// make this an output pin
	LED_OFF;						// start with LED off

	v = (uint32_t)mcg_clk_hz;
	v = v / 1000000;

	while (1)
	{
		for (n=0; n<1000000; n++)  ;	// dumb delay
		mask = 0x80;
		while (mask != 0)
		{
			LED_ON;
			for (n=0; n<1000; n++)  ;		// base delay
			if ((v & mask) == 0)  LED_OFF;	// for 0 bit, all done
			for (n=0; n<2000; n++)  ;		// (for 1 bit, LED is still on)
			LED_OFF;
			for (n=0; n<1000; n++)  ;
			mask = mask >> 1;
		}
	}

	return  0;						// should never get here!
}

Instead of PC5 (pin 13), I want to toggle pin 10, how can I do it?

Thank you for your help in advance.

 

[Frank B]

Look at the schematic to find the pin and read the manual.

Schematic: https://www.pjrc.com/teensy/schematic.html
Manual: https://www.pjrc.com/teensy/datasheets.html

..or just use Arduino.

 

[KurtE]

Agree with Frank... Another option is to look at the Arduino sources...
In particular if you look at the teens3\core_pins.h file

You will find sections for each pin...

#define CORE_PIN10_BIT		4
#define CORE_PIN10_PORTREG	GPIOC_PDOR

From this you know Arduino pin 10 is C4... Note: I have excel document for T3.5/6 for the different pins. I know others have done the same for other boards as well.

 

[Shekhar]

Agree with Frank... Another option is to look at the Arduino sources...
In particular if you look at the teens3\core_pins.h file

You will find sections for each pin...

#define CORE_PIN10_BIT		4
#define CORE_PIN10_PORTREG	GPIOC_PDOR

From this you know Arduino pin 10 is C4... Note: I have excel document for T3.5/6 for the different pins. I know others have done the same for other boards as well.

Thank you for your reply, it helped.

 

[Shekhar]

Thank you. I got my answer. Have a great day