interrupts

Hi Paul,

the problem ending up in _undefined or _prefetchAbort is, that you use a library which supports the device floating-point (FPU), but your code does not enable the FPU. At the beginning of an interrupt routine a write to the FPU happens, which causes the _undefined or _prefetchAbort, if the FPU is disabled The easiest way to fix the issue is to enable the FPU by calling the following function at the beginning of _c_int00() in sys_startup.. 

;-------------------------------------------------------------------------------

; Enable VFP Unit

.def _coreEnableVfp_

.asmfunc

_coreEnableVfp_

mrc p15, #0x00, r0, c1, c0, #0x02

orr r0, r0, #0xF00000

mcr p15, #0x00, r0, c1, c0, #0x02

mov r0, #0x40000000

fmxr fpexc, r0

bx lr

.endasmfunc

;-------------------------------------------------------------------------------

Further-on, when looking to the interrupt setup for the FlexRay interrupts in FRay.c, I have one concern:

it looks as if all Status Interrupts are mapped to CC_int0, but CC_int1 gets enabled at the last line of the interrupt initialization.

// Initialize Interrupts

Fray_PST-> EIR_UN.EIR_UL = 0xFFFFFFFF; // Clear Error Int.

Fray_PST-> SIR_UN.SIR_UL = 0xFFFFFFFF; // Clear Status Int.

Fray_PST-> SILS_UN.SILS_UL = 0x00000000; // all Status Int. to eray_int0

Fray_PST-> SIER_UN.SIER_UL = 0xFFFFFFFF; // Disable all Status Int.

Fray_PST-> SIES_UN.SIES_UL = 0x00000004 | 0x00008000; // Enable CYCSE Int. and SDS Int.

Fray_PST-> ILE_UN.ILE_UL = 0x00000002; // enable eray_int1It

Best Regards,

Peter