I am using a K60
I do not understand why I am getting an Unhandled Exception for a vector I have installed a handler for!
I am using a pin on PortE and initialize as follows:
#ifdef __MQX__
if (!lwgpio_init(&fpga_irq, BSP_FPGA_IRQ, LWGPIO_DIR_INPUT, LWGPIO_VALUE_NOCHANGE)) {
sprintf(zarr, "Error opening FPGA IRQ %d\r\n", _task_errno);
MON_PRINTF(zarr);
_task_block();
}
lwgpio_set_functionality(&fpga_irq, 1); // MUX=1 is GPIO
lwgpio_set_attribute(&fpga_irq, LWGPIO_ATTR_PULL_UP, LWGPIO_AVAL_ENABLE);
if (!lwgpio_int_init(&fpga_irq, LWGPIO_INT_MODE_FALLING)) {
MON_PRINTF("Initializing button GPIO for interrupt failed.\n");
_task_block();
}
/* install gpio interrupt service routine */
_int_install_isr(lwgpio_int_get_vector(&fpga_irq), FPGA_lisr, (void *) &fpga_irq);
/* set the interrupt level, and unmask the interrupt in interrupt controller*/
_bsp_int_init(lwgpio_int_get_vector(&fpga_irq), 3, 0, TRUE);
/* enable interrupt on GPIO peripheral module*/
lwgpio_int_enable(&fpga_irq, TRUE);
#endif
And my ISR looks like this:
VOID FPGA_lisr(void *pin) {
FPGA_QUEUE_MSG msg;
lwgpio_int_clear_flag((LWGPIO_STRUCT_PTR)pin);
/* do stuff and send message (maybe) and return */
msg.type = FPGA_IRQ;
msg.arg[0] = HS_Flags;
msg.arg[1] = IDLE_Flags;
msg.arg[2] = pm_last_lisr;
msg.arg[3] = pm_last_lisr;
_lwmsgq_send(fpga_queue, (uint32 *)&msg, 0);
}
The interrupt does work but in short order I find myself getting a task exception set in _int_default_irs
I have a breakpoint set there and the vector is the same as the one I installed the handler for.
What could cause that?
Tom
