how can uart1 interrupt pending clear?

[max1868]

It is possible to enter the interrupt vector at the initial reception.
However, it is impossible to escape from interrupts.
It is likely that you will clear the pending bit.
I do not know how to clear the pending bit

plese



void sys_init(void)
{
UART1_Init(115200);
// UART1_FCR |= ( 1 << FIFO_EN ) | ( 1 << RCVR_RST ); // set up UART interrupt
IRQ_CTRL.B31 = 0;
UART1_LCR.B7 = 0;
UART1_INT_ENABLE = 0x1; //Enable Received Data Available Interrupt

}

void interrupt() iv IVT_UART1_IRQ {
temp++;
UART1_Write(temp);

}

[darko.ilijevski]

Hello,

In general, first thing you need to do in the interrupt routine is to clear the interrupt source, so it doesn't repeatedly trigger the same interrupt, if it triggered it already.
There is a good and comprehensive explanation example in the help file of the compiler for the FT900 on using interrupts. You can read about it on the web page below:

http://download.mikroe.com/documents/co ... rrupts.htm

Best regards