How to change TX_PIN_NUMBER to P1.00 on the nRF52840?

RE: How to change TX_PIN_NUMBER to P1.00 on the nRF52840?

Jørgen Holmefjord — Mon, 24 Sep 2018 11:19:05 GMT

If you are using the examples with custom boards, you can follow the documentation to add support for custom boards to the SDK: Using the SDK with other boards

You are not required to use the defines from BSP for pins in your application. You can add a new define in your main.c and pass this to the UART init:

#define UART_TX_PIN NRF_GPIO_PIN_MAP(1,0);

RE: How to change TX_PIN_NUMBER to P1.00 on the nRF52840?

David Fogelsong — Fri, 21 Sep 2018 16:26:32 GMT

Yipee! I made the change by hacking pca10056.h to use this line instead, and it worked! 🙂

#define TX_PIN_NUMBER  NRF_GPIO_PIN_MAP(1,0)

So, that part is good. However, hacking SDK header files is problematic, because then different projects start to interfere with one another because they rely on different hacked SDK's. Is there a more elegant solution than hacking the SDK directly?

i.e. question #1 is answered. But, what is the answer to question #2 in the OP?

RE: How to change TX_PIN_NUMBER to P1.00 on the nRF52840?

David Fogelsong — Fri, 21 Sep 2018 16:13:50 GMT

Looks like you're exactly right. I found this, but it's equivalent to what you said:

//@brief Macro for mapping port and pin numbers to values understandable for nrf_gpio functions.
 
#define NRF_GPIO_PIN_MAP(port, pin) (((port) << 5) | ((pin) & 0x1F))

RE: How to change TX_PIN_NUMBER to P1.00 on the nRF52840?

Peter Kenyon — Fri, 21 Sep 2018 15:42:47 GMT

try adding 32 to the pin number for port 1 it worked for me, ie pin 32 in your case