UART Parity Control

[Alexander Maurer]

Hello I found similar questions but no answer? In the manual is written that I can control the parity bit in manual mode with the TXPARITY register but I can not find how?

I need to explicitly control the 9th parity bit regardless of what the parity is of the data being sent.

from the nRf51822 datasheet

27.1.5 Parity configuration When parity is enabled, the parity bit can be generated automatically from the odd parity of TXD, or alternatively the parity bit can be specified explicitly in the TXPARITY register.

Kind Regards Alex

[Nedecz Mihály]

Hi! I have a same problem. Are you resolved this?

[Manny M.]

I also have the same problem. I'm looking to use specify the parity bit using TXPARITY register instead of it automatically being generated from TXD and cannot find a way to do it. Has anyone resolved this?

[Alexander Maurer]

Hi For my problem I fixed it for EVEN Parity with this code

params.baud_rate = UART_BAUDRATE_BAUDRATE_Baud19200;
params.tx_pin_no = TX_PIN_NUMBER;
params.rx_pin_no = RX_PIN_NUMBER;
params.use_parity = true;
params.flow_control = APP_UART_FLOW_CONTROL_DISABLED;

err_code = app_uart_init(&params, &bufs, uart_evt_handler, APP_IRQ_PRIORITY_LOW,  

In the function app_uart_init I changed

if (p_comm_params->use_parity)
{
			NRF_UART0->CONFIG  = 0x0E; // Parity enable   RX TX Auto
}