able to set the clock speed in MHz.

1 files changed, 11 insertions, 23 deletions

diff --git a/system-clock/src/main.c b/system-clock/src/main.c
index da4afd0..39f4a80 100644
--- a/system-clock/src/main.c
+++ b/system-clock/src/main.c
@@ -1,8 +1,9 @@
 #include "gpio.h"
 #include "delay.h"
 #include "clock.h"
+#include "spin.h"
 
-volatile uint32_t delay_amt = 65535;
+volatile uint32_t delay_amt = 20000000 / 4;
 
 /* Main function. This gets executed from the interrupt vector defined above. */
 int main()
@@ -14,35 +15,22 @@ int main()
   gpio_output_pin_t pin1 = set_gpio_pin_output(port_b, PIN_1);
 
   /* Enable a higher clock frequency. */
-  set_sys_clock();
+  set_system_clock_MHz(80);
 
+  uint32_t count = 0;
   while(1) {
     /* Set the GPIO pin to high. */
-    pin_on(pin3);
     pin_off(pin1);
-    delay(delay_amt);
-    delay(delay_amt);
-    delay(delay_amt);
-    delay(delay_amt);
-    delay(delay_amt);
-    delay(delay_amt);
-    delay(delay_amt);
-    delay(delay_amt);
-    delay(delay_amt);
+    pin_off(pin3);
     delay(delay_amt);
 
     /* Set the GPIO pin to low. */
-    pin_off(pin3);
-    pin_on(pin1);
-    delay(delay_amt);
-    delay(delay_amt);
-    delay(delay_amt);
-    delay(delay_amt);
-    delay(delay_amt);
-    delay(delay_amt);
-    delay(delay_amt);
-    delay(delay_amt);
-    delay(delay_amt);
+    if (count % 4 == 0) {
+      pin_on(pin1);
+    }
+    pin_on(pin3);
     delay(delay_amt);
+
+    ++ count;
   }
 }