void platform_uart_irq( platform_uart_driver_t* driver )
{
platform_uart_port_t* uart = (platform_uart_port_t*) driver->interface->uart_base;
uint8_t data=0;
while (Chip_UART_GetLineStatus(uart) & UART_LSR_RDR) {
Chip_UART_ReceiveByte(uart,&data);
ring_buffer_write( driver->rx_buffer,&data, 1 );
}
// Notify thread if sufficient data are available
if ( ( driver->rx_size > 0 ) && ( ring_buffer_used_space( driver->rx_buffer ) >= driver->rx_size ) )
{
host_rtos_set_semaphore( &driver->rx_complete, WICED_TRUE );
driver->rx_size = 0;
}
}
/* Get Interrupt Stream Status */
UART_INT_STATUS_Type Chip_UART_GetIntStatus(LPC_USART_Type *UARTx)
{
uint32_t intsrc, tmp, tmp1;
UART_INT_STATUS_Type ret = UART_INTSTS_ERROR;
/* Determine the interrupt source */
intsrc = Chip_UART_IntGetStatus(UARTx);
tmp = intsrc & UART_IIR_INTID_MASK;
/* Receive Line Status */
if (tmp == UART_IIR_INTID_RLS) {
/* Check line status */
tmp1 = (uint32_t) Chip_UART_GetLineStatus(UARTx);
/* Mask out the Receive Ready and Transmit Holding empty status */
tmp1 &= (UART_LSR_OE | UART_LSR_PE | UART_LSR_FE \
| UART_LSR_BI | UART_LSR_RXFE);
/* If any error exist */
if (tmp1) {
return UART_INTSTS_ERROR;
}
}
/* Receive Data Available or Character time-out */
if ((tmp == UART_IIR_INTID_RDA) || (tmp == UART_IIR_INTID_CTI)) {
ret |= UART_INTSTS_RTR;
}
/* Transmit Holding Empty */
if (tmp == UART_IIR_INTID_THRE) {
ret |= UART_INTSTS_RTS;
}
if (intsrc & UART_IIR_ABEO_INT){
ret |= UART_INTSTS_ABEO;
}
else if (intsrc & UART_IIR_ABTO_INT){
ret |= UART_INTSTS_ABTO;
}
return ret;
}