Posted on May 17, 2011 at 09:58Dear 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.
