IAR error ''SysTick_IRQn'' has already been declared in the current scope.

[to_sam_kim]

Posted on January 24, 2014 at 17:56

Hello,

I try to write a simple LED blink with delay by SisTick. But, IAR EWARM keep giving me error, ''SysTick_IRQn'' has already been declared in the current scope'', with SysTick ISR. So I clicked the error message. It leaded me to the line below in stm32f4xx.h. SysTick_IRQn                = -1,     /*!< 15 Cortex-M4 System Tick Interrupt I tested a similar code with Keil. Keil didn't give the error. Please let me know any mistakes. Thanks.

&sharpinclude <stm32f4xx.h>

&sharpinclude <stdio.h> &sharpinclude <stm32f4xx_rcc.h> &sharpinclude <stm32f4xx_gpio.h>

void GPIO_Configuration(void)

{   GPIO_InitTypeDef GPIO_InitStruct;     RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);     GPIO_InitStruct.GPIO_Pin = GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;   GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;   GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;   GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;   GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;   GPIO_Init(GPIOD, &GPIO_InitStruct); }

volatile unsigned int msTicks;

void SysTick_IRQn(void)

{    msTicks++; }

void Delay (unsigned int dlyTicks)

{                                                unsigned int curTicks;

  curTicks = msTicks;

  while ((msTicks - curTicks) < dlyTicks); }

void main(void)

{   GPIO_Configuration();     /* max para should be 2^24-1 = 16777215 = 0xFFFFFF, Systic clock = HCLK = 168MHz. */   /* ms tick. */   SysTick_Config(SystemCoreClock / 1000);       while(1)   {    GPIO_SetBits(GPIOD, GPIO_Pin_12);    // LED4, Green on    GPIO_ResetBits(GPIOD, GPIO_Pin_13);    GPIO_ResetBits(GPIOD, GPIO_Pin_14);    GPIO_ResetBits(GPIOD, GPIO_Pin_15);       Delay(50);    GPIO_ResetBits(GPIOD, GPIO_Pin_12);    GPIO_SetBits(GPIOD, GPIO_Pin_13);    // LED5, Orange on    GPIO_ResetBits(GPIOD, GPIO_Pin_14);    GPIO_ResetBits(GPIOD, GPIO_Pin_15);       Delay(50);       GPIO_ResetBits(GPIOD, GPIO_Pin_12);    GPIO_SetBits(GPIOD, GPIO_Pin_14);    // LED5, red on    GPIO_ResetBits(GPIOD, GPIO_Pin_13);    GPIO_ResetBits(GPIOD, GPIO_Pin_15);       Delay(50);       GPIO_ResetBits(GPIOD, GPIO_Pin_12);    GPIO_SetBits(GPIOD, GPIO_Pin_15);    // LED5, red on    GPIO_ResetBits(GPIOD, GPIO_Pin_14);    GPIO_ResetBits(GPIOD, GPIO_Pin_13);          Delay(50);   } } #stm32f4-discovery-sistick

[Tesla DeLorean]

Posted on January 24, 2014 at 18:36

void SysTick_IRQn(void)

{    msTicks++; } No this should be SysTick_Handler(void) it's a function, not an index into the NVIC/SystemHandler table.

[chen]

Posted on January 24, 2014 at 18:41

Hi

There must be another define somewhere. Or the file stm32f4xx.h has been included twice in a file somewhere. Another possibility is the file stm32f4xx.h has been added twice in the IAR project settings.

[to_sam_kim]

Posted on January 24, 2014 at 19:28

Thank you so much!

I confused SysTick_Handler with SysTick_IRQn. I used SysTick_Handler in Keil that's why I didn't get error. Problem was solved. Thanks again.