init

1 files changed, 31 insertions, 0 deletions

diff --git a/software_pwm.h b/software_pwm.h
new file mode 100644
index 0000000..1976c65
--- /dev/null
+++ b/software_pwm.h
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+#ifndef SOFTWARE_PWM_H
+#define SOFTWARE_PWM_H
+
+#include <stdint.h>
+
+#define SOFTPWM_PIN_COUNT 8
+#define PWM_FREQ 300  //hz
+
+/** Our microcontroller we have laying around only has 4 hardware pwm channels.
+ * Because we want 8, we will create software PWM as an alternative.
+ *
+ * Notes to self to forcast nessessary optimizations (translates to color accuracy): 
+ *  Our error margin is 1/255th (13us at pwm freq 300hz) of a cycle. 
+ *  Cycles until next channel could be triggered:
+ *    209 at 16Mhz
+ *    130 at 10Mhz (have one available)
+ *    104 at 8Mhz
+ *    13 at 1Mhz (have one available)
+ *
+ * To decrease the amount of cycles every pwm timer interrupt, we'll generate the 
+ *
+ * We might also want to make sure these values aren't updated every loop
+ *  from random noise coming from the potentiometer. Test without, decide then.
+ */
+
+void init_softpwm();
+void initilize_duty_cycle(uint8_t pin);
+void softpwm_set(uint8_t pin, uint8_t duty);
+
+
+#endif