5402, problems using timer 1 | TMS320C54x

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I have made a delay function where I use Timer 1. It seems to work fine until the first timer underflow. I can see that the Timer1 flag is set in the interrupt flag register, but the flag is not reset when the interrupt is taken. The other interrupts I use in my program resets their interrupt flags when the interrupts are executed. I have also tried to reset the TINT1 flag in the IFR register by writing a "1" to the TINIT1 bit, but the flag is not reset. This flag can also be set by DMA channel 1. I have disabled the DMA channel and also set the INTOSEL value in the DMPREC register to 0 ( bit 7 and 6 ). Thus, the interrupt flag is set by the Timer 1 interrupt and not the DMA channel 1. I have also tried to use Timer 0 instead of Timer 1 in my delay function, and this works fine. Have anyone used the Timer 1 register in the 5402 ? There has to be a difference between Timer 0 and Timer 1 since my delay function works fine with Timer 0 and not with Timer 1 ! Best regards Torgeir Jakobsen e-mail:

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5402, problems using timer 1 - Author Unknown - Nov 10 17:41:00 1999