Usage of Secondary Buffer in UART

[Mihir Tailor]

Recently i am developing an application based on UART on nRF51822 platfrom, where an application receives the data through UART. During development, i went through nRF UART driver module. Inside the nRF UART driver module, i didnt understand the use of Second Buffer in the Data Receiving process.

So i would like to ask that why second buffer will be used in Data Receiving (RX) process? What are the advantages of Second Buffer if used during Receiving of Data?

   

[Jørgen Holmefjord]

Hi,

Double buffering allows you to read/process one buffer, while one buffer is being filled by the peripheral. The second buffer can be set immediately after the transfer to the first buffer is started. This is described in the API documentation of function nrf_drv_uart_rx().

Best regards,
Jørgen