Anil Nadargi

Interrupt based LP UART driver 

Discussion created by Anil Nadargi on Jun 21, 2016
Latest reply on Aug 11, 2016 by xiangjun.rong

Hi ,

We are working KL27 series SOC . We are using LPUART module for one of peripehrial .

We need to implement the in the LPUART module in interrupt mode i.e. if some data arrived at the LPUART buffer ,

interrupt for LPUART will be raised .


We have done with adding the LPUART component with following configuration

a. Enabled the RX interrupt .

b. Enabled the RX callbacks with user buffer as "char bufferr[500]" .

c. Toggle the LED in the RX Callback .


Currently the RX callback is called for each byte . So if the peripheral is sending multiple data bytes we are receiving multiple interrupts .


Our expectation is to call the RX callback function when the data buffer is full i.e. if at least 500 bytes are received by LPUART .

We also checked the Component configuration in the KDS but there is no such configuration to set the buffer size for triggering the RX callback.