RE: Can the same SW run on a 422 & a 822?

FormerMember — Tue, 14 Jun 2016 11:47:16 GMT

Good that you were able to solve the problem!

RE: Can the same SW run on a 422 & a 822?

Bernard Perrin — Mon, 13 Jun 2016 17:21:00 GMT

Thank you for your answer.

Yes, our board has an external 32 kHz and it doesn't oscillate too (as the 16 MHz).

I did a mistake: it is written CEAAD1 (and not CEAAO1) on the chip and it seems to be a second release.

I wrote the very simple program below. It works as expected on the demo board (P0.1 300ns @ 1 and 600ns @ 0). No one oscillator runs too. But when I use it with our board, P0.1 stay at 0 and I have the impression it is turned as an input.

On our board, DCC is left unconnected. Could it be a problem? The used schematic is below.

Bernard

#include <stdbool.h>
#include <stdint.h>
#include "nrf_gpio.h"

/**
 * @brief Function for application main entry.
 */
int main(void)
{
	NRF_GPIO->PIN_CNF[1] = NRF_GPIO_PIN_DIR_OUTPUT << GPIO_PIN_CNF_DIR_Pos;

    while (true) {
		NRF_GPIO->OUTCLR =  (1<<1);
		NRF_GPIO->OUTSET = ~(1<<1);
		NRF_GPIO->OUTCLR =  (1<<1);
		NRF_GPIO->OUTSET = ~(1<<1);

		NRF_GPIO->OUTCLR = ~(1<<1);
		NRF_GPIO->OUTSET =  (1<<1);
    }
}

Finally the bug has been fixed: we have a chip with 16k of RAM. Changing the map file solved the problem.

It was not easy to see what our chip is supporting when we ordered it and it wasn't better when we got it. The 3 lines written on top of it was not clearly identifying the release, the memory size. So a hex file which run on the demo board cannot run on our board. Only the reverse way is true.

RE: Can the same SW run on a 422 & a 822?

FormerMember — Mon, 13 Jun 2016 12:51:24 GMT

Yes, you can run the same code on nRF51822/nRF51422.

The nRF51-DK has an external 32 kHz crystal, does your board have it as well? If not, did you remember to set the LFCLK clock source to the internal RC oscillator?

Update 14.06.16: @Bernard Perrin found the problem: The chip on the external board had 16 kB of RAM, while the nRF51-DK has 32 kB of RAM.