Hi Jan,
On 13.01.2015 11:13, Jan Wagner wrote:
Hi christian,
i will create the gfx soon. I also wanted to do some testing about the PIN
nunberig.
https://github.com/RIOT-OS/RIOT/blob/master/boards/yunjia-nrf51822/include/periph_conf.h
#define GPIO_0_PIN 7
#define GPIO_1_PIN 8
#define GPIO_2_PIN 9
etc.
I dont get why its starting at 7. i dont own a yunia board.
The rationale for the pin numbering is quite simple: do with it for your
board whatever you feel like... :-)
We designed the peripheral drivers in a way, that we do a 1-to-1 mapping
between peripherals and pins, meaning that each pin is mapped to exactly
one peripheral, so the pin is mapped to one of e.g. SPI or GPIO or UART.
For the yunjia board I just decided to use pins 7 to 14 for GPIO for no
hard reason. And as the NRF SoC only has one port, it is enough for this
platform to just define pins...
So for your board you just change the pin layout to whatever you see fit.
Regarding the LED defines: At least the defines for RED and GREEN must
be present, but it is completely ok to leave them blank. The rationale
for the hard-coded LED control defines in RIOT is simply that they are
often used for timing measurements and for this we try to keep the
overhead as low as possible. But if a board does not include LEDs and
you don't plan on using them for profiling/debugging, it is completely
fine to leave those defines empty.
Let me know if there is anything unclear!
Cheers,
Hauke
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