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How can we re-enable specific hardware interrupts at start of DSP/BIOS timer-tick ISR? Our situation is that we need to respond to McBSP0 Rx and Tx interrupts within 15 usec, but in some cases the DSP/BIOS timer tick ISR occurs very close to the McBSP interrupt, and the timer-tick ISR then takes more than 15 usec to run. When that happens, the serial port words we need to read/write are already shifted out. Our McBSP bit rate is 1.024 Mbps minimum, but can be as high as 6.144 Mbps. At the higher rate we have only about 2.5 usec to respond. Thanks in advance! Linda |
re-enable specific hardware interrupts at start of DSP/BIOS timer-tick
Started by ●March 3, 2004
