How to read UART Rx FIFO when triggered interrupt for 8 byte is generated ?

balwant — Tue, 16 Jan 2018 16:16:19 GMT

I am working on UART in which i want Interrupt to be invoke after 8 bytes of data is received in FIFO. How to read this FIFO after interrupt is generated.

Re: How to read UART Rx FIFO when triggered interrupt for 8 byte is generated ?

kerryzhou — Thu, 18 Jan 2018 04:33:36 GMT

Hi BALWANT BISHNOI.

1. Interrupt is invoked after 8 bytes of data is received in FIFO.

You can configure this register:

2. How to read this FIFO after interrupt is generated.

You can read it like this:

/* Read data through the UART peripheral (non-blocking) */
int Chip_UART_Read(LPC_USART_T *pUART, void *data, int numBytes)
{
int readBytes = 0;
uint8_t *p8 = (uint8_t *) data;

   /* Send until the transmit FIFO is full or out of bytes */
   while ((readBytes < numBytes) &&
           ((Chip_UART_ReadLineStatus(pUART) & UART_LSR_RDR) != 0)) {
       *p8 = Chip_UART_ReadByte(pUART);
       p8++;
       readBytes++;
   }

return readBytes;
}

Wish it helps you!

Have a great day,
Kerry

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topic How to read UART Rx FIFO when triggered interrupt for 8 byte is generated ? in LPC Microcontrollers

How to read UART Rx FIFO when triggered interrupt for 8 byte is generated ?

Re: How to read UART Rx FIFO when triggered interrupt for 8 byte is generated ?