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Discussion Groups | TMS320C54x | uart interrupt trouble in C5407
Technical discussions about the TI C54x DSPs (including the c5401, c5402, c5402a, c5404, c5407, c5409, c5409a, c5410, c5410a, c5416, c5420, c5421, c5441, c549, c5470 and c5471).
uart interrupt trouble in C5407 - endy_dsp - Feb 20 10:38:00 2005
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Hello, In polling mode uart works fine but when I try to use Uart interrupts in C5407 theres something wrong while reading data. I do this way: 1) I set up the register IER (interrupt enable register) and enable receive interrupt (IER=1) 2) I don't use FIFO. 3) In function uart_isr() I read RBR (receive buffer reg.) in such way: // USAR = RBR_SUBADDR; // rword = (USDR & 0x00FF); 4) I don't use CSL. I receive interrupt only ones, but the buffer is not being read, and data is still in RBR. Next time uart doesn't interrupt. What should I do? I tried to insert a small delay before reading RBR in uart_isr() but still the same. Does anyone know what is going on? Thanks for any help. Maciek |
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