Data Abort when reading adcRAM1

Jerome Beauvais

Expert 1770 points

The module ADC1 is configured with HCG in non-continuous mode.

Interrupts are disabled.

When I use the HCG driver in C I can read the conversion result successfully.

I want to read directly the conversion result in adc RAM1 : 0xFF3E0000 with the following instruction :

ldmdb r10,{r1,r0} ;r10= 0xFF3E0000

But when the processor executes the instruction the abort vector is fetched.

Thanks a lot for your help

over 11 years ago

0 Sunil Oak over 11 years ago

TI__Mastermind 49120 points

Hello,

The ldmdb instruction causes the base address to be decremented before the memory access. Decrementing 0xFF3E0000 results into an address that will cause a data abort (access to part of MibADC2 RAM memory frame beyond an offset of 0x1fff).

Regards, Sunil

0 Jerome Beauvais over 11 years ago in reply to Sunil Oak

Expert 1770 points

Thanks a lot for your help.

It's OK now

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Data Abort when reading adcRAM1