Posted on May 07, 2008 at 19:19I have configured the ARM7 for external interrupts on P2.8
I am toggling a i/o P2.12 in the interrupt handler (to indicate that it is getting executed).
Whenever the interrupt is generated from the external hardware the led associated with P2.8 goes low (typically lit or high). But the led on P2.12 does not toggle. I looked through the configuration and they looked alrite. Also the vector table. The code snippet is attached here. Any leads would be appreciated.
// Enable XTI and GPIO2 clocks on APB2
APB_ClockConfig(APB2, ENABLE, GPIO2_Periph | XTI_Periph);
// XTI configuration
XTI_Init();
XTI_LineModeConfig(XTI_Line2, XTI_FallingEdge);
XTI_LineConfig(XTI_Line2, ENABLE);
XTI_ModeConfig(XTI_Interrupt, ENABLE);
// Configure XTI IRQ channel
EIC_IRQChannelPriorityConfig(XTI_IRQChannel, 4);
EIC_IRQChannelConfig(XTI_IRQChannel, ENABLE);
EIC_IRQConfig(ENABLE);
GPIO_Config(GPIO2, 0x0001 << 0x08, GPIO_IPUPD_WP);
