Compiler/TMS320F28069: Assembly code for toggling a GPIO-port from within an ISR

Terje Bohler1

Intellectual 330 points

Part Number: TMS320F28069

Tool/software: TI C/C++ Compiler

Hi all.

I need the following C-statement to be put into my ISR:

GpioDataRegs.GPATOGGLE.bit.GPIO16 = 1; //Toggle PCB led

It's already used from within the C-code, but I need to move it to the entry of my ISR (for test purposes).

I'll appreciate assistance with this issue...

Best regards Terje Bøhler

over 9 years ago

0 Keith Barkley over 9 years ago

Guru 44035 points

Why not look at the assembly listing for your C code?

0 Whitney Dewey over 9 years ago

TI__Guru 55085 points

You could do something like:

MOVZ DP, #7f00h >> 6 ;Load DP with the GPIO data registers' base address
MOV @7h, #0001h ;Set bit 16 of GPATOGGLE (address 0x7f06)

There may be a prettier way to write it--my assembly is a little rough--but that should work.

Whitney

C2000™︎ microcontrollers

C2000 microcontrollers forum

Compiler/TMS320F28069: Assembly code for toggling a GPIO-port from within an ISR