NRF_ERROR_SVC_HANDLER_MISSING whith uart

[strengthstrong]

When I use the uart to transparently transmit, there is no problem at around 4k/s. When I increase the transparent transmission rate, there will be NRF_ERROR_SVC_HANDLER_MISSING this error in the APP_UART_COMMUNICATION_ERROR event. 

What is the reason, I have been unable to find the reason, if you want a higher transmission rate, what should I do, I do not want to use flow control, dma is not a better choice?

[Sigurd]

Hi,

I believe that the error is really NRF_UARTE_ERROR_OVERRUN_MASK. Please check this by taking a look at the value of app_uart_evt_t::error_communication when the error occurs. As indicated here, the value is 1 when the UART is overrun.

Please enable the EasyDMA if you have not already done that, and see if it improves the situation.

[strengthstrong]

but i find this error only 1kb/s  this sometimes , which is strange,  what happen , is this  error code of myself?

[strengthstrong]

I found that this error was also found when my transmission rate was very small. Sometimes I just started to pass the transmission and there was an error. Sometimes I have a mistake and I don’t know where there is a problem.

[Sigurd]

Are you sure that you are getting the NRF_ERROR_SVC_HANDLER_MISSING in the APP_UART_COMMUNICATION_ERROR event?

What IDE/Toolchain are you using ?

What SDK version is this?

Could you add a screenshot, or a debug log/trace that shows the error ?

 

[strengthstrong]

I use the gcc compiler, sdk14.2 NRF52832, I just sent the serial port to the data and transmitted it in the air. My original code is on NRF52810. This problem does not occur, but I have this problem when I ported to 52832. I try I don't change the routine ble_app_uart, just change the logic part, but this problem still occurs. I send 7 bytes every 10ms, and it will go wrong after ten seconds.

this is my log  bound  115200bps

[Sigurd]

What do you have at line 798 and 797 in main.c ?

[strengthstrong]

[strengthstrong]

this is  APP_UART_COMMUNICATION_ERROR

[strengthstrong]

I want to know why this is not the case with the NRF52810, and this is the case with the NRF52832.

[Sigurd]

Make sure that you have UART_EASY_DMA_SUPPORT set to 1 in sdk_config.h. You can also try to increase the RX/RX buffers, and see if that helps (UART_TX_BUF_SIZE/ UART_RX_BUF_SIZE). Slightly increasing the UART IRQ priority might also help, try setting UART_DEFAULT_CONFIG_IRQ_PRIORITY in sdk_config.h to 6.