Part Number: MSP432P401R
Tool/software: TI C/C++ Compiler
Hi,
I'm trying to code the startup_msp432 C file in assembly (for academic purpose).
I'm able to migrate the vector able and include the necessary directives to get the reset handler working.
c_stack pointer seemed to be correctly inserted and C env correctly initialised because the C functions in the main routine seemed to be called correctly.
But I can't quite figure out how to reference other interrupt handlers whose ISR is coded in C in another file. I tried to use .ref in the asm file and explicitly delcare the funcions in the respective C files but still get unresolved symbols error when linking the project. I must have missed something here so appreciate if anyone could give some insights.
A side question:
The samplel startup_MSP432p401r_ccs.c fiel has the CSTACK pointer in the vector table as "(void (*)(void))((uint32_t)&__STACK_END)",
Why is there a need to dereference the __STACK_END?
Thanks!
Below is an extract of the startup.asm file
;========startup.asm==========
.ref __STACK_END
.ref _c_int00
.ref _SysTick_Handler
.ref _EUSCIA0_IRQHandler
.ref _PORT1_IRQHandler
.retain ".intvecs"
.sect ".intvecs"
.word __STACK_END
.word Reset_Handler
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word _SysTick_Handler ;Systick Handler
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word _EUSCIA0_IRQHandler
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word _PORT1_IRQHandler
.text
Reset_Handler:
b.w _c_int00
;======= end ===========
Regards
OHL
