STM32F407 Timer Interrupt - c

Question

I working on STM32F4-Discovery with FreeRTOS v9. I have 2 tasks, task 1 is for blinking the LED, and task 2 I use for etherenet connection using LwIP.
Task 1
void test_print(void)
{
TickType_t wake_time,tamp1,tamp2;
const uint32_t period = 100;
char buff[32];
wake_time = xTaskGetTickCount();
while(1)
{
USART_puts("aaaaaaaaaaa\n ");
GPIO_SetBits(GPIOD,GPIO_Pin_13);
delay_dw(500); //This is just my own function delay
GPIO_ResetBits(GPIOD,GPIO_Pin_13);
delay_dw(500);
}
}
Task 2
void echo_tcp()
{
int c1,c2;
char clock[32],tmp[32];
tamp = 0;
while(1)
{
if(ETH_CheckFrameReceived())
{
cycle_start();
c1 = getCycles();
LwIP_Pkt_Handle();
c2 = getCycles();
cycle_stop();
tamp+= c2 - c1;
GPIO_SetBits(GPIOD,GPIO_Pin_12);
delay_dw(2000);
GPIO_ResetBits(GPIOD,GPIO_Pin_12);
delay_dw(2000);
}
else
{
GPIO_ResetBits(GPIOD,GPIO_Pin_12);
LwIP_Periodic_Handle(LocalTime);
}
}
}
I using a timer function for interrupt. The purpose of interrupt on this case is to show me about the cycle of the Task 2 every 1 second when I gives some connection load while 2 Tasks are running together.
This is my interrupt configuration
void TIM2_Config(){
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_PCLK1Config(RCC_HCLK_Div16);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
TIM_TimeBaseStructure.TIM_Prescaler = 42000-1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = 200-1;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM2,&TIM_TimeBaseStructure);
TIM_Cmd(TIM2,ENABLE);
}
void TIM_IT_Enable(){
TIM_ITConfig(TIM2,TIM_IT_Update, ENABLE);
}
void NVIC_Config(){
NVIC_InitTypeDef NVIC_InitStrurture;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStrurture.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStrurture.NVIC_IRQChannelPreemptionPriority = 0x00;
NVIC_InitStrurture.NVIC_IRQChannelSubPriority = 0x00;
NVIC_InitStrurture.NVIC_IRQChannelCmd =ENABLE;
NVIC_Init(&NVIC_InitStrurture);
}
int nInterrupt=0,counter;
char buffer[32];
char buf_temp[32];
void TIM2_IRQHandler(){
if(TIM_GetITStatus(TIM2,TIM_IT_Update)!=RESET){
TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
nInterrupt++;
//USART_puts("Interrupt!!\n");
sprintf(buf_temp,"%d\n",temp); //tamp is int variable
USART_puts(buf_temp); //BUG IN HERE
temp = 0;
}
}
When I compile it and upload it on my STM32F4-Discovery all the tasks are not running, but when I command (disabled) the usart function on my TIM2_IRQHandler() function all the tasks are working well. If I do so, I can't see about the cycle of my Task. Anyone help please??
Sorry for bad English
Regards, Rama