complete activity 13

3 files changed, 30 insertions, 3 deletions

diff --git a/project/Core/Src/Activties/activity13.c b/project/Core/Src/Activties/activity13.c
new file mode 100644
index 0000000..19eb0a4
--- /dev/null
+++ b/project/Core/Src/Activties/activity13.c
@@ -0,0 +1,26 @@
+/*
+ * activity13.c
+ *
+ *  Created on: Nov 18, 2025
+ *      Author: sowgro
+ */
+#include <stdint.h>
+#include <stdio.h>
+#include "systick.h"
+
+//write 1s for half the freq and 0s for the other half
+void play_freq(uint8_t hz) {
+	uint32_t rollover =herz_to_systicks(hz);
+	int count = systick_get_count();
+	if ((count % rollover) < (rollover >> 1))
+		printf("1");
+	else
+		printf("0");
+}
+
+void activity13_run() {
+	init_systick();
+	for(;;) {
+		play_freq(1);
+	}
+}
diff --git a/project/Core/Src/System/systick.c b/project/Core/Src/System/systick.c
index f9e2470..5d4d259 100644
--- a/project/Core/Src/System/systick.c
+++ b/project/Core/Src/System/systick.c
@@ -20,7 +20,7 @@ void init_systick()
 	s->CSR &= ~1;
 	s->CSR |= 1<<2;
 	s->CSR |= 1<<1; // enable interrupt
-	s->RVR = 78124; // 100 ms
+	s->RVR = 79;
 	s->CSR |= 1;
 }
 
@@ -60,7 +60,7 @@ int check_systick() {
 
 static uint32_t count = 0;
 void SysTick_Handler() {
-	player_action_tick(count++);
+	count++;
 }
 
 uint32_t systick_get_count() {
diff --git a/project/Core/Src/main.c b/project/Core/Src/main.c
index eaf1c63..60d5b3d 100644
--- a/project/Core/Src/main.c
+++ b/project/Core/Src/main.c
@@ -29,6 +29,7 @@ int main(void){
 //	project_run();
 //	activity10_run();
 //	hw6_run();
-	activity12_run();
+//	activity12_run();
+	activity13_run();
 }