nrf_libuarte_async_rx_free ?

[RixtronixLAB]

Dear Member,

I want to call nrf_libuarte_async_rx_free from another file outside main.c

nrf_libuarte_async_rx_free(&libuarte1, (uint8_t *)&GPS.rxTmp, 1);

I got  

..\..\..\GPS-Lib\GPS_lib.c(35): error:  #20: identifier "libuarte1" is undefined

I have included 

#include "nrf_libuarte_async.h"

in GPS_lib.c

and

NRF_LIBUARTE_ASYNC_DEFINE(libuarte1, 1, 2, 2, NRF_LIBUARTE_PERIPHERAL_NOT_USED, 255, 3);

in main.c ,

How can I rectify it ?

Thanks

[Jørgen Holmefjord]

Hi,

The NRF_LIBUARTE_ASYNC_DEFINE macro will declare libuarte1 in your main.c file as a static variable, which prevents you from accessing it outside of the file where it is declared (out-of-scope).

You have some different options to resolve this:

• Modify the NRF_LIBUARTE_ASYNC_DEFINE macro in nrf_libuarte_async.h to declare the nrf_libuarte_async_t object as non-static, then declare the variable as extern in the file where you want to use it.
• Declare a pointer to libuarte1 in main.c, and declare the same pointer as extern in the file where you want to use it (see this post).
• Implement a function in main.c that calls nrf_libuarte_async_rx_free() for you, and declare this function in a header-file (main.h) that you include in the file where you want to use the function.

Best regards,
Jørgen

[RixtronixLAB]

extern const nrf_libuarte_async_t libuarte1; in main.c and

I call

nrf_libuarte_async_rx_free(&libuarte1, (uint8_t *)&GPS.rxTmp, 1); in GPS_lib.c

Correct me  ? thanks

[RixtronixLAB]

it's working with :

nrf_libuarte_async_rx_free(&libuarte1, (uint8_t *)&GPS.rxTmp, 1);   

but not working with

nrf_libuarte_async_tx(&libuarte, GPS.rxBuffer, 512);

I don't understand ? they use the same

const nrf_libuarte_async_t _name

[Jørgen Holmefjord]

RixtronixLAB said:

but not working with

nrf_libuarte_async_tx(&libuarte, GPS.rxBuffer, 512);

What exactly is not working with this? Do you get compile errors? Errors during run-time? Data not being transmitted correctly?