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Perhaps someone can give me some guidance here: On my 56F8346 EVM board I have an SPI D/A converter that requires 2 bytes sent out the SPI0 port to output a voltage. Since this is meant for a control system experiment I need to generate a time base to do this. I tried creating a timer interrupt @ a 500 Hz rate using a Processor Expert Bean and TimerA. I stuck my working SPI code (another Bean with a manual Chip Select I/O line being toggled - SM1_SendChar()) into the Bean Generated timer code - void TI1_OnInterrupt(void) I run it on the EVM and my SPI lines all go low and I get no DAC output - Is there something funny happening or a technique I should be using to get my SPI code to run inside the interrupt? Thank you in advance. Erick

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