commit 4870817c7d8aa12848f7f6c82813666780e8a620
parent 733b8485871e58a0c242c6fd836f3d994b679bbf
Author: William Lindholm <william_lindholm@outlook.com>
Date: Wed, 9 Oct 2024 12:27:48 +0100
Created interrupt based cylon led pattern.
Diffstat:
2 files changed, 153 insertions(+), 5 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -50,3 +50,6 @@ modules.order
Module.symvers
Mkfile.old
dkms.conf
+
+# Debug directory
+**/Debug/*
+\ No newline at end of file
diff --git a/Project1/Project1/main.c b/Project1/Project1/main.c
@@ -2,17 +2,160 @@
* Project1.c
*
* Created: 2024-10-09 11:21:00
- * Author : William
+ * Authors: William Lindholm, Thomas Berry
*/
+#define BINARY_SETTINGS 1
+
#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <avr/cpufunc.h>
+
+/* Use a struct to make the association between PORTs and bits connected to the LED array more explicit */
+struct LED_BITS
+{
+ PORT_t *LED_PORT;
+ uint8_t bit_mapping;
+};
+
+enum DIRECTION
+{
+ LEFT,
+ RIGHT
+};
+
+struct LED_BITS LED_Array[10] = {
+ {&PORTC, PIN5_bm}, {&PORTC, PIN4_bm}, {&PORTA, PIN0_bm}, {&PORTF, PIN5_bm}, {&PORTC, PIN6_bm}, {&PORTB, PIN2_bm}, {&PORTF, PIN4_bm}, {&PORTA, PIN1_bm}, {&PORTA, PIN2_bm}, {&PORTA, PIN3_bm}
+};
+
+uint8_t CURRENT_CYLON_LED = 0; // Index of the current LED
+enum DIRECTION CURRENT_CYLON_DIRECTION = LEFT;
+
+void CLOCK_init (void);
+void InitialiseLED_PORT_bits(void);
+void Set_Clear_Ports(uint8_t set);
+void TCA0_init_bits(void);
+
+
+void CLOCK_init (void)
+{
+ /* Disable CLK_PER Prescaler */
+ ccp_write_io( (void *) &CLKCTRL.MCLKCTRLB , (0 << CLKCTRL_PEN_bp));
+ /* If set from the fuses during device programming, the CPU will now run at 20MHz (default is /6) */
+}
+
+void InitialiseLED_PORT_bits()
+{
+ PORTC.DIR = PIN6_bm | PIN5_bm | PIN4_bm; /*(1<<6) | (1<<5) | (1<<4); 0x70;*/ /* PC4-UNO D1 (TXD1), PC5-UNO D0 (RXD1), PC6 - UNO D4 */
+ PORTA.DIR = PIN3_bm | PIN2_bm | PIN1_bm | PIN0_bm; /*(1<<1) | (1<<0); 0x0f; */ /* PA1-UNO D7, PA0 - UNO D2, PA2- LED8, PA3 - LED9 */
+ PORTB.DIR = PIN2_bm; /*0x04;*/ /* PB2 - UNO D5 */
+ PORTF.DIR = PIN5_bm | PIN4_bm; /*(1<<5) | (1<<4); 0x30; */ /* PF5 - UNO D3, PF4 UNO D6 */
+ /* Later use PIN6_bm etc */
+}
+/* Function to set or clear all LED port bits, 1 - set, 0 - clear */
+void Set_Clear_Ports(uint8_t set) {
+
+ uint8_t i;
+
+ for (i = 0; i <= 9; i += 1)
+ {
+ if (set)
+ LED_Array[i].LED_PORT->OUTSET = LED_Array[i].bit_mapping;
+ else
+ LED_Array[i].LED_PORT->OUTCLR = LED_Array[i].bit_mapping;
+ }
+}
+
+void Toggle_Ports(void)
+{
+ uint8_t i;
+
+ for (i = 0; i <= 9; i += 1)
+ {
+ LED_Array[i].LED_PORT->OUTTGL = LED_Array[i].bit_mapping;
+ }
+}
int main(void)
{
- /* Replace with your application code */
- while (1)
- {
- }
+ CLOCK_init();
+
+ /* set UNO D0-D7 to all outputs, also LED8 and LED9 */
+ InitialiseLED_PORT_bits();
+
+ Set_Clear_Ports(0);
+
+ TCA0_init_bits();
+
+ sei();
+
+ while (1)
+ {
+ }
+}
+
+void TCA0_init_bits(void)
+{
+
+ #ifdef BINARY_SETTINGS
+
+ TCA0.SINGLE.INTCTRL = 0b00000001; /* Counter overflow interrupt option */
+ TCA0.SINGLE.CTRLB = 0b00000000; /* Normal Mode selected - TOP value in PER register */
+ TCA0.SINGLE.EVCTRL = 0b00000000; /* TCA0 can count events from the EVENT module - disable this option */
+
+ /* Now set the PER register to 9766, our top value */
+ /* This is because 20MHz/1024 gives TCA0clk period = 51.2us and 51.2us*9766 = 0.5000192s */
+
+ TCA0.SINGLE.PER = 9766; /* The TCA0 counter will overflow when it reaches the PER value */
+ TCA0.SINGLE.CTRLA = 0b00001111; /* Prescale set to /1024 and enable TCA0 (start count) */
+
+ #else
+
+ /* Same implementation using explicit bit naming: */
+ TCA0.SINGLE.INTCTRL = TCA_SINGLE_OVF_bm; //Counter overflow interrupt option
+ TCA0.SINGLE.CTRLB = 0x00; // Normal Mode selected - TOP value in PER register
+ TCA0.SINGLE.EVCTRL = 0x00; // TCA0 can count events from the EVENT module - disable this option
+
+
+ TCA0.SINGLE.PER = 9766; // The TCA0 counter will overflow when it reaches the PER value
+ TCA0.SINGLE.CTRLA = TCA_SINGLE_CLKSEL_DIV1024_gc | TCA_SINGLE_ENABLE_bm; // Prescale set to /1024 and enable TCA0 (start count)
+
+ #endif
+
}
+void Toggle_Cylon_Direction() {
+ CURRENT_CYLON_DIRECTION = (CURRENT_CYLON_DIRECTION == LEFT) ? RIGHT : LEFT;
+}
+
+ISR(TCA0_OVF_vect)
+{
+ if (CURRENT_CYLON_DIRECTION == LEFT)
+ {
+ LED_Array[CURRENT_CYLON_LED].LED_PORT->OUTCLR = LED_Array[CURRENT_CYLON_LED].bit_mapping;
+ LED_Array[CURRENT_CYLON_LED+1].LED_PORT->OUTSET = LED_Array[CURRENT_CYLON_LED+1].bit_mapping;
+ CURRENT_CYLON_LED += 1;
+ }
+ else
+ {
+ LED_Array[CURRENT_CYLON_LED].LED_PORT->OUTCLR = LED_Array[CURRENT_CYLON_LED].bit_mapping;
+ LED_Array[CURRENT_CYLON_LED-1].LED_PORT->OUTSET = LED_Array[CURRENT_CYLON_LED-1].bit_mapping;
+ CURRENT_CYLON_LED -= 1;
+ }
+
+ if (CURRENT_CYLON_LED >= 9 || CURRENT_CYLON_LED <= 0) {
+ Toggle_Cylon_Direction();
+ }
+
+ //Toggle_Ports();
+ /* The interrupt flag has to be cleared manually */
+
+ #ifdef BINARY_SETTINGS
+ TCA0.SINGLE.INTFLAGS = 0b00000001; /* Writing 1 to the flag bit clears it */
+ #else
+ /* Same implementation using explicit bit naming: */
+ TCA0.SINGLE.INTFLAGS = TCA_SINGLE_OVF_bm;
+ #endif
+
+}
+\ No newline at end of file
