Posted on July 09, 2008 at 14:03Dear All,
I'm new stakeholder of ST devices.
I'm using an STR750 with its Evaluation Board and CrossWork.
I tried some Examples to use the LCD, UART, GPIO and
I didn't find big difficulties.
I'm now trying to use the examples related to TIM and Interrupt:
void main()
{
#ifdef DEBUG
debug();
#endif
/* MRCC Configuration */
MRCC_Configuration();
/* GPIO Configuration */
GPIO_Configuration();
/* EIC Configuration */
EIC_Configuration();
/* TIM Configuration in Output Compare Toggle Mode ----------*/
/* CK_TIM = 60 MHz, Prescaler = 0x0, TIM0_CLK = CK_TIM/(Prescaler + 1) = 60 MHz */
/* OC1 update rate = TIM0_CLK / TIM_Pulse1 = 60 MHz/ 15000 = 4000 Hz (250 us) */
/* OC2 update rate = TIM0_CLK / TIM_Pulse2 = 60 MHz/ 6000 = 10000 Hz (100 us) */
/* TIM0 Channel1 configuration */
TIM_InitStructure.TIM_Mode = TIM_Mode_OCToggle;
TIM_InitStructure.TIM_Prescaler = 0x0;
TIM_InitStructure.TIM_ClockSource = TIM_ClockSource_Internal;
TIM_InitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_InitStructure.TIM_Period = 0xFFFF;
TIM_InitStructure.TIM_Channel = TIM_Channel_1;
TIM_InitStructure.TIM_Pulse1 = OC1Value;
TIM_InitStructure.TIM_Polarity1 = TIM_Polarity1_Low;
TIM_Init(TIM0, &TIM_InitStructure);
/* TIM0 Channel2 configuration */
TIM_InitStructure.TIM_Channel = TIM_Channel_2;
TIM_InitStructure.TIM_Pulse2 = OC2Value;
TIM_Init(TIM0, &TIM_InitStructure);
/* Preload register on TIM0_OCR1 and TIM0_OCR2 disabled: TIM0_OCR1 and TIM0_OCR2
values are taken in account immediately */
TIM_PreloadConfig(TIM0, TIM_Channel_ALL, DISABLE);
/* Clear TIM0 flags */
TIM_ClearFlag(TIM0, TIM_FLAG_OC1 | TIM_FLAG_OC2| TIM_FLAG_Update);
/* Enable TIM0 Output Compare1&2 interrupt */
TIM_ITConfig(TIM0, TIM_IT_OC1 | TIM_IT_OC2, ENABLE);
/* Enable TIM0 counter */
TIM_Cmd(TIM0, ENABLE);
while(1);
}
The example compiles fine but I was not able to realize how to verify the Interrupt on these lines. I tried to use the function EIC_GetCurrentIRQChannel()
inside the loop:
while(1){
if (EIC_GetCurrentIRQChannel()==TIM0_OC2_IRQChannel) ...
}
But this cause an incorrect verify of the Software downloaded in the Chip;
is it correct to use the function EIC_GetCurrentIRQChannel() to verify the appear of the interrupt on a certain line, or I completly missunderstood the interrupt working way ??
Thanks a lot for any helps, regards LT
[ This message was edited by: lnt on 09-07-2008 17:34 ]
