First Last / Mbed 2 deprecated testInterruptKL25z

Test of interrupt at register level on KL25z

Dependencies:   mbed

main.cpp@0:3e02d7f06e70, 2013-08-02 (annotated)

Committer:
vsluiter
Date:
Fri Aug 02 23:27:41 2013 +0000
Revision:
0:3e02d7f06e70
Child:
1:ff3274c0ed87
First commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vsluiter 0:3e02d7f06e70 1 #include "mbed.h"
vsluiter 0:3e02d7f06e70 2
vsluiter 0:3e02d7f06e70 3
vsluiter 0:3e02d7f06e70 4 // Function prototype/forward declaration for ISR.
vsluiter 0:3e02d7f06e70 5 void atint();
vsluiter 0:3e02d7f06e70 6
vsluiter 0:3e02d7f06e70 7 /** EINT3_IRQHandler
vsluiter 0:3e02d7f06e70 8 */
vsluiter 0:3e02d7f06e70 9 extern "C" void PORTA_IRQHandler __irq (void) {
vsluiter 0:3e02d7f06e70 10
vsluiter 0:3e02d7f06e70 11 // The "event" is connected to pin p10 which is LPC1768 P0_1
vsluiter 0:3e02d7f06e70 12 // so lets trap that and ignore all other GPIO interrupts.
vsluiter 0:3e02d7f06e70 13 // Test for IRQ on Port0.
vsluiter 0:3e02d7f06e70 14 if (PORTA->ISFR & (1<<5))
vsluiter 0:3e02d7f06e70 15 {
vsluiter 0:3e02d7f06e70 16 // If P0_1/p10 rises, call atint()
vsluiter 0:3e02d7f06e70 17 atint();
vsluiter 0:3e02d7f06e70 18 }
vsluiter 0:3e02d7f06e70 19
vsluiter 0:3e02d7f06e70 20 // Clear this and all other possible GPIO generated interrupts as they don't concern us.
vsluiter 0:3e02d7f06e70 21 PORTA->ISFR = 0x0000FFFF;
vsluiter 0:3e02d7f06e70 22 //LPC_GPIOINT->IO2IntClr = (LPC_GPIOINT->IO2IntStatR | LPC_GPIOINT->IO2IntStatF);
vsluiter 0:3e02d7f06e70 23 //LPC_GPIOINT->IO0IntClr = (LPC_GPIOINT->IO0IntStatR | LPC_GPIOINT>IO0IntStatF);
vsluiter 0:3e02d7f06e70 24 }
vsluiter 0:3e02d7f06e70 25
vsluiter 0:3e02d7f06e70 26 void event_irq_init(void) {
vsluiter 0:3e02d7f06e70 27 // Use macro to set p10 as an input.
vsluiter 0:3e02d7f06e70 28 //p10_AS_INPUT;
vsluiter 0:3e02d7f06e70 29 PORTA->PCR[5] = (PORTA->PCR & ~PORT_PCR_MUX_MASK) | PORT_PCR_MUX(0b001);
vsluiter 0:3e02d7f06e70 30 // Enable P0_1/p10 for rising edge interrupt generation.
vsluiter 0:3e02d7f06e70 31 PORTA->PCR[5] = (PORTA->PCR & ~PORT_PCR_IRQC_MASK) | PORT_PCR_IRQC(0b1011);
vsluiter 0:3e02d7f06e70 32
vsluiter 0:3e02d7f06e70 33 //LPC_GPIOINT->IO0IntEnR |= (1UL << 1);
vsluiter 0:3e02d7f06e70 34 // Enable the interrupt.
vsluiter 0:3e02d7f06e70 35 NVIC_EnableIRQ(PORTA_IRQn);
vsluiter 0:3e02d7f06e70 36 }
vsluiter 0:3e02d7f06e70 37
vsluiter 0:3e02d7f06e70 38 int main(void)
vsluiter 0:3e02d7f06e70 39 {
vsluiter 0:3e02d7f06e70 40 event_irq_init();
vsluiter 0:3e02d7f06e70 41 while();
vsluiter 0:3e02d7f06e70 42 }