Hello.
I am using nRF52832. The SDK version is 14.0.0. UARTE is used for serial communication with other devices. The baud rate is 38400bps, and a maximum of 20 bytes of data is sent and received.
There is one mysterious problem. Probably the received data is overwritten. For example, when 0x00,0x01,0x02,0x03 is transmitted from another device, the data obtained by nRF52832's app_uart_get () is 0x00, 0x02, 0x02, 0x03. The frequency of occurrence of this problem is around 10%. I thought that the received data was overwritten somewhere, and confirmed it using STTlogger.
The received data was always correct after confirming the first uarte_irq_handler () called.
After enabling the UART reception task with nrf_uarte_task_trigger () in nrf_drv_uart_rx_for_uarte (), the received data was overwritten when log output was performed. Perhaps the function of easyDMA is related. Next I checked the errata, but none was applicable. Therefore, when the latest SDK version (ver.16.0.0) was confirmed, the data reception function (uart_event_handler ()) of app_uart.c was updated.
When I updated app_uart.c and related files, the problem of overwriting received data has been resolved.
I will check the difference between SDK ver.14.0.0 and ver.16.0.0. I'm looking for errata information about this but I can't find it. (developer.nordicsemi.com/.../release_notes.txt)
Please let me know if you have any information.
Thank you.
