From 242cceb36cf64cc5ad5630faa89a5f64525a3f1c Mon Sep 17 00:00:00 2001
From: polymurph <eddyed.k@gmail.com>
Date: Mon, 17 Oct 2022 20:19:48 +0200
Subject: [PATCH] working on making PA3 LED toggle on PA1 Rising edge interrupt
---
main.c | 30 ++++++++++++++++++------------
1 file changed, 18 insertions(+), 12 deletions(-)
diff --git a/main.c b/main.c
index 4d16077..9837eb8 100644
--- a/main.c
+++ b/main.c
@@ -6,41 +6,47 @@
#include "timer.h"
#include "i2c.h"
+#include "stm32f042x6.h"
#include "hardwareDescription.h"
void setup();
-void EXTI3_IRQHandler(void)
+void EXTI1_IRQHandler(void)
{
- if((EXTI->PR1 & EXTI_PR1_PIF4) != 0) {
+ if((EXTI->PR & EXTI_PR_PIF1) != 0) {
pinToggle(pinB3);
// clear flag
- EXTI->PR1 |= EXTI_PR1_PIF4;
+ EXTI->PR |= EXTI_PR_PIF1;
}
}
int main(int argc, char *argv[])
{
setup();
-
- pinConfig(pinB4, input, def_stage, pullUp, def_speed);
+
+ // https://controllerstech.com/external-interrupt-using-registers/
+
+ pinConfig(pinA1, input, def_stage, pullUp, def_speed);
// enable interrupt
- NVIC_EnableIRQ(EXTI4_IRQn);
+ //NVIC_EnableIRQ(EXTI0_1_IRQn);
// Connect
- RCC->APB2ENR |= RCC_APB2ENR_SYSCFGEN;
- SYSCFG->EXTICR[0] &= ~SYSCFG_EXTICR1_EXTI4;
- SYSCFG->EXTICR[0] |= SYSCFG_EXTICR1_EXTI4_PA;
+ RCC->APB2ENR |= RCC_APB2ENR_SYSCFGCOMPEN;
+ SYSCFG->EXTICR[0] &= ~SYSCFG_EXTICR1_EXTI0;
+ SYSCFG->EXTICR[0] |= SYSCFG_EXTICR1_EXTI0_PA;
// rising trigger selection
- EXTI->RTSR1 |= EXTI_RTSR1_RT4;
+ EXTI->RTSR |= EXTI_RTSR_RT1;
// Interrupt mask register
- EXTI->IMR1 |= EXTI_IMR1_IM4;
+ EXTI->IMR |= EXTI_IMR_IM1;
+
+ NVIC_SetPriority (EXTI1__IRQn, 1);
+ NVIC_EnableIRQ(EXTI1);
while(1);
/*
@@ -79,7 +85,7 @@ void setup()
//blinks 10 times to indicate the sicsessfull init if the device
- for(i = 0 ; i < 2 ; i++) {
+ for(i = 0 ; i < 10 ; i++) {
delayMs(100);
pinToggle(pinB3);
delayMs(100);