Interrupts in C

It has come clear from my attempts to understand the interrupt block, that I will need to first write a program that uses interrupts in C-code in CCS.

Best check what Jess did.

I cannot find if Jess used any interrupts.

I am fed up with TI/ spectrum digitial etc documetnation. I cannot find anywhere what the appropriate pins are for external interrupts. There are meant to be 96 possible connections for interrupts, and I understand that some of those will be internal, however I would have hoped that there are more than 3 external interrupts available. The ones that I can find on the spectrum digtal schematic are:

XINT1n_XBIOn [P8 pin 5 and 22]
XINT2n_ADCSOC [P4 pin 2]
XNMIn_XINT3 (or should it be XINT13) [P2 pin 46]

The ones that I can find in the TI documentation (System control and interrupts referece guide) are:

XINT1_/XBIO [GPIOE0]
XINT2_ADCSOC [GPIOE1]
XNMI_XINT13 [GPIOE2]

As all the info that I can find suggests that the unmasked interrupts are 1,2 and 13, I think that the schematics should have 13 instead of 3.

Here is the diagram from chapter 6 of system control and interrupt souces:



I guess that I am probably limited to using only these pins for interrupts. I hope that I can use them all as I will need one for each of the three current sensors. I thought that I read somewhere that 13 was reserved for the DSP.

In simulink, GPIOE0,1 and 2 are able to be used as GPIO so they may all be available.