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[FreeRTOS Home] [Live FreeRTOS Forum] [FAQ] [Archive Top] [June 2010 Threads] FreeRTOS on MSP430 using IAR interrupts problPosted by Mario Huizar on June 2, 2010 Hello all,
I am using the FreeRTOS on a MSP430FG439 and I want to use the Uart0 but because the Free RTOS on the file portext.s43 redefine the INTVEC I am having problems... The FreeRTOS needs the timer0 to define the "tick" of the OS. And it defines it in assembler like this:
ASEG ORG 0xFFE0 + TIMERA0_VECTOR
_vTickISR_: DC16 vTickISR
I was having the following error:
Error[e16]: Segment INTVEC (size: 0x14 align: 0x1) is too long for segment definition. At least 0x2 more bytes needed. The problem occurred while processing the segment placement command "-Z(CODE)INTVEC=FFE0-FFFF", where at the moment of placement the available memory ranges were "CODE:ffe0-ffeb,CODE:ffee-ffff" Reserved ranges relevant to this placement: ffe0-ffeb INTVEC ffec-ffed Absolute code from TICK_ISR ffee-ffff INTVEC
Now what I did was to redefine the INTVEC as a Common segment like this:
COMMON INTVEC(1) ; Interrupt vectors ORG TIMERA0_VECTOR _vTickISR_: DC16 vTickISR
But now the linker complains with:
Linking Error[e46]: Undefined external "?cstart_init_copy" referred in port ( C:\Users\Mario\Documents\MasterArbeit\Lifebridge\Supervisor\Demo\msp430_IAR\Debug\Obj\ port.r43 ) Error[e46]: Undefined external "?cstart_init_zero" referred in tasks ( C:\Users\Mario\Documents\MasterArbeit\Lifebridge\Supervisor\Demo\msp430_IAR\Debug\Obj\ tasks.r43 ) Error while running Linker
Any ideas?
Thanks! Mario Huizar
RE: FreeRTOS on MSP430 using IAR interrupts problPosted by Dave on June 2, 2010 Sorry, no ideas, but FreeRTOS can use any suitable timer if it is the actual timer it is using that is the issue.
RE: FreeRTOS on MSP430 using IAR interrupts problPosted by Mario Huizar on June 2, 2010 Thanks I already found the solution.. Although I do not know exactly what it was. I think it was a bad configuration setting on the project. I added this Common INTVEC instruction and it actually worked.
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