Embos V3.50 Iar compiler V3.20 and

Let me describe the context : I have a radio communication with another
equipment that gives me CLOCK using the NMI, and DATA through the P5_7
port.

__regbank_interrupt void __NMI_handler( void )[/b]
{
rcBitArray[ rcBitCounter-- ] = P5_bit.P5_7;
}

The use of this NMI is essential, because I have to read the radio frames immediately when they are available.

I have also to manage a communication via Uart4 to a PC :

#pragma vector=(UART4_RX)
__interrupt void Atlas::ISR_S4_Rx( void )
{
OS_EnterInterrupt();
volatile Int16T rxWord = C_Uart::GetReceivedCharU4();

.......elab.....

OS_LeaveInterrupt();
}

The problem is that I see the micro stopping to communicate, after some minutes with the PC linked to the uart, and various errors of the OS, such as sometimes, OS_ERR_DICNT, OS_ERR_INV_TASK, OS_LEAVE_INT

I think the problems is related to the use of NMI in this context, cause if I don't use it I don't see any problem

May you help me ?

Hi, I use Renesas M32C.
I have 2 communication channels :
- one RS232 that uses GetReceivedCharU4()
- a proprietary one that uses NMI,.....rcBitArray is big enough because it uses just 24 bits, and then another interrupt ( int0) reads those, and clears rcBitArray
The main error is , when I use the NMI, a OS_ERR_LEAVEINT.
How can I avoid that
Ciao
Fabio