I want to disable the PST signals, when not debugging, to reduce RF emissions. I used the following code successfully in an MCF537X project, but when I use it on a V4 processor I get an interrupt from the XLB arbiter.
csr_data dc.w 0010110010000000b ;CSR
dc.w 2,0,0 ;PCD
...
lea csr_data,a0
dc.w 1111101111010000b ;wdebug.l a0
dc.w 0000000000000011b
My assembler doesn't support wdebug, hence the hand coded dc.w stuff. All the code does is set the PCD bit in the BDM CSR register.
The fault address is csr_data + 4, i..e. half way through the data. The fault is a slave error acknowledge. The data is correctly aligned on a four byte boundary and is certainly accessible by normal instructions.
Anybody know what is going on here?
TIA, Chris
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