Hi

I have got serious problem with AT91M40800 USART. The problem is, I think, with USART configuration. I'm sending a one character from my computer RS232. Then USART generates interrupt and that is it. He stoppes at instruction: while(!US_CSR1_bit.rxrdy); He does not recive any character? What is wrong?

My configuration is:

__US_MR1 = 0x000008C0; //no Parity, Eihgt bits

__US_IER1 = 0x00000001;
__US_IDR1 = 0xFFFFFFFE;

__US_BRGR1 = 40000000 / 9600/ 16;

__US_RPR1 = 0x00000814;
__US_RCR1 = 0x0000000F; // USART RECEIVER BUFOR SIZE


__AIC_SMR3 = 0x00000026; EDGE TRIGGERED
__AIC_SVR3 = 0x01001FFF;

__AIC_SMR16 = 0x00000005;
__AIC_SVR16 = 0x01002FFF;

__AIC_IECR = 0x00010008; // USART1 & IRQ0 ENABLED
__AIC_IDCR = 0xFFFEFFF7;
__AIC_ICCR = 0x00010008;
__AIC_ISCR = 0x00000000;

__US_CR1 = 0x000000A0; // Disable receiver, disable transmitter.
__US_CR1 = 0x0000010C; // Reset status bits, reset rx/tx.
__US_CR1 = 0x00000010; // Enable receiver

I dont know what to do. I have tryed everything.

best regards
Michal Kowalczyk

try www.toadhaul.org/arm.php

Be sure that the clock of the usart is turned ON.

Else, check our software examples on our website

http://www.atmel.com/dyn/products/tools ... ol_id=2717

This for the EB40A with the R40008 CPU, but the usart is the same.

Bye