Difference between revisions of "Start Development"
From Rigol Homebrew Wiki
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=== Pitfalls === | === Pitfalls === | ||
| − | + | ; Alignment | |
| − | Every command must be word aligned. When you access the memory, word accesses must be word aligned, long word accesses must be long word aligned. | + | : Every command must be word aligned. When you access the memory, word accesses must be word aligned, long word accesses must be long word aligned. |
| − | Don't use the .align directive | + | : '''Don't''' use the .align directive . It doesn't works with the toolchain. Use .byte directives to do that. |
| − | + | ; Subroutines / Calls | |
| − | Every subroutine that calls subroutines must start with LINK and end with UNLINK to save the return address to the stack. The blackfin CPU doesn't do that automatic. | + | : Every subroutine that calls subroutines must start with LINK and end with UNLINK to save the return address to the stack. The blackfin CPU doesn't do that automatic. |
Example: | Example: | ||
| Line 40: | Line 40: | ||
UNLINK | UNLINK | ||
RTS | RTS | ||
| + | |||
| + | ; STOP-Mode | ||
| + | : Switch your scope to the STOP-Mode if you don't need capturing during your software is working. Sometimes i got unpredictable crashs when the Device was in AUTO-Mode. Hope to find a reason for this thing soon. | ||
Revision as of 15:22, 22 December 2011
Sorry, not complete yet...
Download the Toolchain from https://github.com/krater/rigol-toolchain
and follow the instructions in the README file...
howto compile examples
links to blackfin prm
Pitfalls
- Alignment
- Every command must be word aligned. When you access the memory, word accesses must be word aligned, long word accesses must be long word aligned.
- Don't use the .align directive . It doesn't works with the toolchain. Use .byte directives to do that.
- Subroutines / Calls
- Every subroutine that calls subroutines must start with LINK and end with UNLINK to save the return address to the stack. The blackfin CPU doesn't do that automatic.
Example:
sub: LINK 0x0 ... CALL sub2 ... UNLINK RTS ; STOP-Mode : Switch your scope to the STOP-Mode if you don't need capturing during your software is working. Sometimes i got unpredictable crashs when the Device was in AUTO-Mode. Hope to find a reason for this thing soon.
