external interrupt 2

[satnam]

Posted on July 02, 2009 at 02:46

external interrupt 2

[bbalasa]

Posted on May 17, 2011 at 09:58

GPIO3 generates INT on EXTIT0_ITLine.(WIU group0 VIC1.10)

Use EXTIT0_ITLine instead of EXTIT2_ITLine

[satnam]

Posted on May 17, 2011 at 09:58

Dear All,

I am trying to get external interrupt 2 on port pin 3.2 of MCU. I have done the following configuration but the code never enters the ISR section.

Also i have checked the configuration in simulator of KEIL, the VIC section shows that the group2 interrupt has been set, while i had set the extint2.

Please check the code and help me out with this problem.

/* Enable the GPIO3 */

SCU_APBPeriphClockConfig(__GPIO3, ENABLE);

SCU_APBPeriphReset(__GPIO3,DISABLE); /*out of RESET state*/

/* Enable WIU clock */

SCU_APBPeriphClockConfig(__WIU, ENABLE);

/* Enable VIC clock */

SCU_AHBPeriphClockConfig(__VIC,ENABLE);

SCU_AHBPeriphReset(__VIC,DISABLE); /* out of RESET state*/

// 3.2

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 ;//

GPIO_InitStructure.GPIO_Direction = GPIO_PinInput;

GPIO_InitStructure.GPIO_Type = GPIO_Type_OpenCollector;

GPIO_Init (GPIO3, &GPIO_InitStructure);

VIC_Config(EXTIT2_ITLine, VIC_IRQ,2);

VIC_ITCmd(EXTIT2_ITLine, ENABLE);

WIU_DeInit();

WIU_StructInit(&WIU_InitStruct);

WIU_InitStruct.WIU_TriggerEdge = WIU_FallingEdge;

WIU_InitStruct.WIU_Line = WIU_Line2;

WIU_Init(&WIU_InitStruct);

WIU_Cmd(ENABLE);

SCU_WakeUpLineConfig(2);

WIU_ClearITPendingBit(WIU_Line2);

WIU_ClearITPendingBit(2);

Other codes are also used for UART and RTC, they are working fine as interrupts.

Please ask if any more information or code is required.

Thanks and regards.

[satnam]

Posted on May 17, 2011 at 09:58

Thanks for the help, now it is working.