Victor Szultka
Perform an LED toggle by interrupt over an existing sequence. PRints out to LCD upon occurence of interrupt.
Revision 0:d2238a225cb8, committed 2020-07-31
- Comitter:
- saltire78
- Date:
- Fri Jul 31 12:45:22 2020 +0000
- Commit message:
- online posting
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/C12832.lib Fri Jul 31 12:45:22 2020 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/askksa12543/code/C12832/#990d5eec2ef6
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Jul 31 12:45:22 2020 +0000
@@ -0,0 +1,41 @@
+#include"mbed.h" // mbed header
+#include "C12832.h" // lcd header
+
+InterruptIn joystickcenter(p14); // initialise interrupt pin on pcb
+InterruptIn button(p9); // initialise external interrupt pin
+DigitalOut led(LED1); // initialise interrupt led
+DigitalOut flash(LED4); // initialise main program led
+C12832 lcd(p5, p7, p6, p8, p11); // initialise lcd
+Timer debounce; // create debouce timer variable
+int state; // create interrupt activation variable
+int i=0; // create interrupt activation iterable variable
+
+void flip(){
+ debounce.start(); // start the timer
+ led=!led; // toggles the led when the joystick button is pressed.
+ state= 1; // changes global variable when interrupt activated
+ if (debounce.read_ms() >= 500){ // determine the timer limits - greater than or equal incase the exact count was missed by timer
+ debounce.reset(); // reset the timer for the next use
+ }
+
+}
+
+int main(){
+ joystickcenter.rise(&flip); //attach the function address to the rising edge
+ button.mode(PullUp); // With this, no external pullup resistor needed
+ button.rise(&flip); // attach the function address to the rising edge
+
+ while(1){ //continuous run
+ if (state == 1){ // if interrupt activated
+ i++; // iterate the variable i
+ lcd.locate(0,0); // home the lcd
+ lcd.printf("Interrupt Activated x %d", i); // add lcd text
+ state = 0; // reset the state variable from the interrupt
+ }
+ else // normal operation
+ {
+ flash=!flash; // turns LED4 on ifoff, off if on
+ wait(0.25); // the instruction to wait for a quarter-second
+ }
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Jul 31 12:45:22 2020 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/mbed_official/code/mbed/builds/65be27845400 \ No newline at end of file