Arduino Due, IDE 1.5.8 (because my 1.6.8 doesn’t have Arduino Due under TOOLS, I’m sure I didn’t install it correctly or something…)
Goal - Use a Timer to increment a variable every 1us – Status Complete
(from other examples on forum for IRQs )
Goal - Setup and read in whole PORT C (31 bits) at once, (not one pin at a time)
HDS = REG_PIOC_PDSR – Status Complete
I can’t seem to get the 2 to work together.
For simpleness I have just used the pinMode(33, INPUT) which should setup all the other registers, but my guess it is also re-setting or writing registers that I have had setup for the IRQ.
Any ideas or directions into the SMART ARM datasheet or where I can find some more info?
Other question: On page 629 of the datasheet it shows an I/O example. Why would you have to set the PER and then set the PDR (enable and disable register) both? Is this the standard? It doesn’t default to 1 status and then you either set it one way or the other? I guess it seems like if you would set PIO-PER to 0x0000FFFF (to enable the bottom 16bits, it would also mean to disable the top 16bits) PIO_PDR to 0xFFFF0000.
Anyway just curious about the double writing to the registers
Looking for suggestions or directions to information.
All, I just thought, I am using the Serial to view my PORTC data bits. It never shows any data, is this because of the IRQ???