Tool/software: TI-RTOS
Hi, I am using SDK 1.40.
I have modified the simple_peripheral project to include two SPI devices in parallel, their hardware interrupts are dispatching events to the main application task. The SPI is configured in callback mode and the
sempahore is not posted until the transaction is complete. Each slave has their own SPI chip select. Now the whole process of CS=0->transaction-CS=1 is guarded yet by another global mutex semaphore, to ensure
that only one slave is serviced at a time. The initalization stage works fine for both devices, the problem arises when the interrupts are enabled, whoever gets serviced first will own the SPI bus forever, with the other
device blocked out.
The interrupt works correctly when only one of the devices is present, I can switch between which one will own the bus by manualy switching the respective IRQ PIN. I should mention that the interrupt routine is
clearing the interrupt flag and then reading some values from the devices register.
Instead of a hardware ISR I have moved the routine to be triggered by a periodic clock - same result. No other devices are present. If I move one of the devices to the other SPI bus, they can work side by side, the
problem is only with them working from one bus in parallel. Hwi stack is 1024 with peak around 500. Increasing the advertisment interval or connection does not influence the behaviour.
I can just use two buses - it is not a problem - I am just courious what is going on. Could this be a hardware related problem with the parallel connection or the fact that these are triggered from the same task
context?
Cheers
