unsigned int getsUART3(unsigned int length,unsigned int *buffer,
unsigned int uart_data_wait)
{
int wait = 0;
char *temp_ptr = (char *) buffer;
while(length) /* read till length is 0 */
{
while(!DataRdyUART3())
{
if(wait < uart_data_wait)
wait++ ; /*wait for more data */
else
return(length); /*Time out- Return words/bytes to be read */
}
wait=0;
if(U3MODEbits.PDSEL == 3) /* check if TX/RX is 8bits or 9bits */
*buffer++ = U3RXREG; /* data word from HW buffer to SW buffer */
else
*temp_ptr++ = U3RXREG & 0xFF; /* data byte from HW buffer to SW buffer */
length--;
}
return(length); /* number of data yet to be received i.e.,0 */
}
// UART3 RX ISR
void __attribute__ ((interrupt,no_auto_psv)) _U3RXInterrupt(void)
{
// Clear the interrupt status of UART1 RX
U3RX_Clear_Intr_Status_Bit;
if(DataRdyUART3())
{
incoming_char = ReadUART3(); // Get the character coming from USB UART
while(BusyUART1());
WriteUART1(incoming_char); // Send the character to the GSM UART
while(BusyUART3());
WriteUART3(incoming_char); // Send the character to the USB UART
}
}
