usart0 interrupt receiver lpc845

Sathiya_T — Thu, 23 May 2024 06:26:59 GMT

Hi,

am using lpc845, sdk example USART0 transfer interrupt project, data send in the transfer method is working good. But in interrupt method receiver is not work, then the Xfer->rxdata is always 0. please be explain the receiver data register and i just print the data in g_rxbuffer but always I got 0 only.

another one doubt is in transfer interrupt method NVIC handler is enable,but in receiver function i could not seen any handler,only register(base->INTSET) is present in the example project, i want to know thr receiver NVIC,and receiver buffer for output data.

here i attached my doubt area while debugging, please be explain .

Re: usart0 interrupt receiver lpc845

Harry_Zhang — Tue, 11 Jun 2024 01:59:54 GMT

Hi @Sathiya_T

Q1:

You can add these code to print receives buffer.
for (uint8_t i =0;i<ECHO_BUFFER_LENGTH;i++)

{

PRINTF("g_rxBuffer[%d]=%d\r\n",i,g_rxBuffer[i]);

}

You can refer to the picture.

And The output of the serial port is shown in the figure.

Q2:

The

EXAMPLE_USARTUserCallback

function is the interrupt call back function.

When an interrupt is triggered, it will enter the callback function.

Hope this will help you.

Hang

LPC Microcontrollers中的主题 usart0 interrupt receiver lpc845

usart0 interrupt receiver lpc845

Re: usart0 interrupt receiver lpc845