RE: UART SDK12 NRF_LOG_GETCHAR() does not work

639zw — Mon, 03 Apr 2017 14:45:39 GMT

Thanks for this answer saved me a bit of time. Just as an update for others: NRF_LOG_GETCHAR() does now work without hardware flow control. (Tested with NRF52-DK SDK 12.2.0)

RE: UART SDK12 NRF_LOG_GETCHAR() does not work

vit bernatik — Thu, 20 Oct 2016 16:21:45 GMT

I found a fix - you need to change a file: SDK12\components\drivers_nrf\uart\nrf_drv_uart.c lines 81 and 94 from:

nrf_gpio_cfg_input(p_config->pselcts, NRF_GPIO_PIN_NOPULL);

Into:

nrf_gpio_cfg_input(p_config->pselcts, NRF_GPIO_PIN_PULLDOWN);

Also note that flow control has to be enabled in "sdk_config.h":

#define NRF_LOG_BACKEND_SERIAL_UART_FLOW_CONTROL 1

Note that another option is to add external pull down on CTS (P0.7) and it starts work. Even when I touch it by finger it works...