Not able to allocate UART receive buffer

[zhouhaifang]

  I use our designed board with control chip nrf5340  to test ncs1.5.0 sample peripheral_uart , I not changed a word of sample .but when debug program, show :Not able to allocate UART receive buffer.   this buffer is only 20 bytes length!!!! .our board can load /debug ,but when debug ncs1.5.0 example peripheral_uart ,alway error . is our board supply voltage error or design error???, or soft may have some configure i do not configure??? using nrf5340dk debug will not produce these error.

 

[zhouhaifang]

in ncs1.5.0,there is two samples use this way to deal with uart receive event , in sample peripheral_uart  function void uart_cb(xxxx)  ,there are two place like below code:

struct uart_data_t *buf

buf = k_malloc(sizeof(*buf));
if (buf) {
 buf->len = 0;
} else {
 LOG_WRN("Not able to allocate UART receive buffer");
k_delayed_work_submit(&uart_work,UART_WAIT_FOR_BUF_DELAY);
 
}

when using nrf5340 debug ,every encount this situation . program all run to else branching ，not run to if branching

NORDIC code style is  difficult  than all other chip manufacture code style ,nordic code always turn a thousand turns,very difficult to understand .a mini change always mean many error.i declare

static struct uart_data_t *buf

a globle variable of in main.c  , and delete all code as below:

buf = k_malloc(sizeof(*buf));
if (buf) {
 buf->len = 0;
} else {
 LOG_WRN("Not able to allocate UART receive buffer");

but can not work well .

i do not change a word of sample peripherart_uart in NCS1.5.0 !!!

[JONATHAN LL]

Hi,

What version of the nrf53 are you using, are you on a DK that is earlier then 0.11.0 ?


Here is the different places where the its used


https://github.com/nrfconnect/sdk-nrf/blob/a18b84ef0c7231291ca718b5876af50ed33b7923/samples/bluetooth/peripheral_uart/src/main.c#L137 
https://github.com/nrfconnect/sdk-nrf/blob/a18b84ef0c7231291ca718b5876af50ed33b7923/samples/bluetooth/peripheral_uart/src/main.c#L153 


https://github.com/nrfconnect/sdk-nrf/blob/a18b84ef0c7231291ca718b5876af50ed33b7923/samples/bluetooth/peripheral_uart/src/main.c#L194 



Did it work in NCS 1.5.0 for you?

Regards,
Jonathan