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-rw-r--r--keyboard/cluepad/backlight.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/keyboard/cluepad/backlight.c b/keyboard/cluepad/backlight.c
new file mode 100644
index 000000000..a9caed1df
--- /dev/null
+++ b/keyboard/cluepad/backlight.c
@@ -0,0 +1,54 @@
+#include <avr/io.h>
+#include "backlight.h"
+#include "led.h"
+
+#include "print.h"
+
+int pwm_level;
+
+void led_set_kb(uint8_t usb_led)
+{
+ print("led_set\n");
+}
+
+void init_backlight_pin(void)
+{
+ // Set C7 to output
+ DDRC |= (1<<7);
+
+ // Initialize the timer
+ TC4H = 0x03;
+ OCR4C = 0xFF;
+ TCCR4A = 0b10000010;
+ TCCR4B = 0b00000001;
+}
+
+void backlight_set(uint8_t level)
+{
+ // Determine the PWM level
+ switch (level)
+ {
+ case 0:
+ // 33%
+ pwm_level = 0x54;
+ break;
+ case 1:
+ // 66%
+ pwm_level = 0xA8;
+ break;
+ case 2:
+ // 100%
+ pwm_level = 0xFF;
+ break;
+ case 3:
+ // 0%
+ pwm_level = 0x00;
+ break;
+ default:
+ xprintf("Unknown level: %d\n", level);
+ }
+
+ // Write the PWM level to the timer
+ TC4H = pwm_level >> 8;
+ OCR4A = 0xFF & pwm_level;
+}