added PWM_powerground_control()

moved pg2 to TIM15CH2

Core/Inc/PWM_control.h

@@ -5,6 +5,24 @@
 #include "ADBMS_LL_Driver.h"
 #include "main.h"
 
+/*  The PWM period (1/FPWM) is defined by the following parameters: 
+ARR value, the Prescaler value, and the internal clock itself which drives the timer module FCLK.
+F_PWM = (F_CLK)/((ARR + 1) * (PSC + 1))
+
+F_CLK = 16 MHz
+
+POWERGROUND ESC Signal: pulse every 20 ms, 1 ms = 0%, 2 ms = 100%
+FREQ = 50 Hz -> 16 MHz/50 Hz = 320000 = ((9999 + 1) * (31 + 1))
+DUTY CYCLE = 1/20 -> 0%, DUTY CYCLE = 2/20 -> 100% 
+CCR * DUTY_CYCLE
+CCR: 1/20 -> 500, 2/20 -> 1000
+*/
+#define POWERGROUND_FREQ            50
+#define POWERGROUND_MAX_DUTY_CYCLE  0.05
+#define POWERGROUND_MIN_DUTY_CYCLE  0.1
+
+//#define BATTERY_COOLING_FREQ        20000
+
 void PWM_control_init(TIM_HandleTypeDef powerground1, TIM_HandleTypeDef powerground2, TIM_HandleTypeDef battery_cooling);
 
 void PWM_powerground_control(uint8_t percent);