STM8S003F3 using COSMIC C compiler - ''invalid pointer initializer'' in stm8_interrupt_vector.c

[GenuineDeveloper]

Posted on June 17, 2018 at 11:15

Hi,

I am trying to implement timer based on interrupt in STM8S003F3 using STVD and COSMIC C Compiler free version.

I tried following this tutorial available on web

http://embedded-lab.com/blog/starting-stm8-microcontrollers/19/

. However, while modifying the stm8_interrupt_vector.c file for adding my TIM2_IRQHandler in the interrupt vector struct under irq no. 13, I am getting this error: 'invalid pointer initializer'. What am I doing wrong here?

My stm8_interrupt_vector.c looks like this:

typedef void @far (*interrupt_handler_t)(void);

struct interrupt_vector {

    unsigned char interrupt_instruction;    interrupt_handler_t interrupt_handler;};

@far @interrupt_handler_t void NonHandledInterrupt (void)

{    /* in order to detect unexpected events during development,        it is recommended to set a breakpoint on the following instruction    */    return;}

extern void _stext();     /* startup routine */

struct interrupt_vector const _vectab[] = {    {0x82, (interrupt_handler_t)_stext}, /* reset */    {0x82, NonHandledInterrupt}, /* trap  */    {0x82, NonHandledInterrupt}, /* irq0  */    {0x82, NonHandledInterrupt}, /* irq1  */    {0x82, NonHandledInterrupt}, /* irq2  */    {0x82, NonHandledInterrupt}, /* irq3  */    {0x82, NonHandledInterrupt}, /* irq4  */    {0x82, NonHandledInterrupt}, /* irq5  */    {0x82, NonHandledInterrupt}, /* irq6  */    {0x82, NonHandledInterrupt}, /* irq7  */    {0x82, NonHandledInterrupt}, /* irq8  */    {0x82, NonHandledInterrupt}, /* irq9  */    {0x82, NonHandledInterrupt}, /* irq10 */    {0x82, NonHandledInterrupt}, /* irq11 */    {0x82, NonHandledInterrupt}, /* irq12 */    //{0x82, NonHandledInterrupt}, /* irq13 */    {0x82, (interrupt_handler_t)TIM2_UPD_IRQHandler}, /* irq13 */    {0x82, NonHandledInterrupt}, /* irq14 */    {0x82, NonHandledInterrupt}, /* irq15 */    {0x82, NonHandledInterrupt}, /* irq16 */    {0x82, NonHandledInterrupt}, /* irq17 */    {0x82, NonHandledInterrupt}, /* irq18 */    {0x82, NonHandledInterrupt}, /* irq19 */    {0x82, NonHandledInterrupt}, /* irq20 */    {0x82, NonHandledInterrupt}, /* irq21 */    {0x82, NonHandledInterrupt}, /* irq22 */    {0x82, NonHandledInterrupt}, /* irq23 */    {0x82, NonHandledInterrupt}, /* irq24 */    {0x82, NonHandledInterrupt}, /* irq25 */    {0x82, NonHandledInterrupt}, /* irq26 */    {0x82, NonHandledInterrupt}, /* irq27 */    {0x82, NonHandledInterrupt}, /* irq28 */    {0x82, NonHandledInterrupt}, /* irq29 */};

and added this to stm8_itc.h

/* Define to prevent recursive inclusion -------------------------------------*/

&sharpifndef __STM8S_ITC_H&sharpdefine __STM8S_ITC_H@far @interrupt void TIM2_UPD_IRQHandler(void);/* Includes ------------------------------------------------------------------*/&sharpinclude 'stm8s.h'

and this is my TIM2_UPD_IRQHandler(void) ISR inside stm8_itc.c:

extern char cFlag;      // char cFlag is declared in main.c and used in the interrupt as a flag to be used in while(1)

void TIM2_UPD_IRQHandler(void)

{    TIM4_ClearITPendingBit(TIM2_IT_UPDATE);    TIM4_ClearFlag(TIM2_FLAG_UPDATE);    cFlag = 1;}

What am I doing wrong here? Any suggestions would be of really great help. Thanks!

#stm8s003f3p #stm8s-spl #stm8

[GenuineDeveloper]

Posted on June 17, 2018 at 13:22

Or are there any better ways to use interrupt functions in a program?

[GenuineDeveloper]

Posted on June 18, 2018 at 08:30

Any help on this regard? or is this too trivial an issue?

[henry.dick]

Posted on June 18, 2018 at 12:20

1. does the compiler give you a line number for the error?

2. is the ISR properly declared -> as extern or in a header file?

[martonmiklos]

Posted on June 18, 2018 at 11:49

Here are my known to be working snipplets:

extern @far @interrupt void NonHandledInterrupt(void);

extern @far @interrupt void RX_IOC(void);extern @far @interrupt void Seed_IOC(void);extern @far @interrupt void Seed_2_3_IOC(void);extern @far @interrupt void OneMsTimerOVF(void);extern @far @interrupt void RX_ISR(void);extern @far @interrupt void TX_ISR(void);extern @far @interrupt void MicroSecTickTimerOVF(void);

.....

struct interrupt_vector const _vectab[] = {

    {0x82, (interrupt_handler_t)_stext},    /* reset */    {0x82, NonHandledInterrupt},             /* TRAP        */    {0x82, NonHandledInterrupt},             /* TLI         */    {0x82, NonHandledInterrupt},             /* AWU         */    {0x82, NonHandledInterrupt},             /* CLK         */    {0x82, Seed_2_3_IOC},                   /* EXTI PORTA  for seed signal 2-3 */

@far @interrupt void NonHandledInterrupt(void);

@far @interrupt void RX_IOC(void);

@far @interrupt void Seed_IOC(void);@far @interrupt void Seed_2_3_IOC(void);@far @interrupt void Seed_2_3_IOC(void){        uint8_t tmp = SEED_SIGNAL_2_port;

As far as I can see:

- No typecasting in the ISR vector table

- extern function declarations in the interrupt table file

- @far @interrupt  specifiers a the ISR function implementations

[luca239955_stm1_st]

Posted on June 19, 2018 at 10:08

Hello,

did you solve this? Most likely you missed the extern..

Regards,

Luca (Cosmic)