EECS 461

EECS 461 Prelab 5 Due 02/18/2020 1. T_clock = 1/40e6 = 2.5e-8 s For 20 kHz, T_interrupt = 1/20e3 s = 5e-5s ⇒ # LPIT clocks = 5e-5/2.5e-8 = 2000 ⇒ timer initial value (TMR_VAL) = 2000 - 1 = 1999 For 1 kHz, T_interrupt = 1/1e3 kHz = 1e-3s ⇒ # LPIT clocks = 1e-3/2.5e-8 = 40000 ⇒ timer initial value (TMR_VAL) = 40000- 1 = 39999 /* LPIT.h University of Michigan EECS 461, Embedded Control Systems Low Power Interrupt Timer (LPIT) Read Chapter 30 in S32K144 User's Manual Revi...

EECS 461 Prelab 4 Declarations for pwm.c /* pwm.c University of Michigan EECS 461, Embedded Control Systems Pulse-Width Modulation using FlexTimer Module Read Chapter 45 in S32K144 User's Manual Important sections: 45.4.2: Register Descriptions 45.5.7: Edge-Aligned PWM (EPWM) Mode */ #include "eecs461.h" #include "pwm.h" #define PWM_CLOCK_FREQ /* PWM Parameters */ #define MOTOR_PORT B #define MOTOR_PCR 12 #define MOTOR_MUX 0b001 #define FILTER_PORT B #define FILTER_P...

EECS 461 Prelab 4 Due 02/04/2020 Declarations for pwm.c /* pwm.c University of Michigan EECS 461, Embedded Control Systems Pulse-Width Modulation using FlexTimer Module Read Chapter 45 in S32K144 User's Manual Important sections: 45.4.2: Register Descriptions 45.5.7: Edge-Aligned PWM (EPWM) Mode */ #include "eecs461.h" #include "pwm.h" #define PWM_CLOCK_FREQ /* PWM Parameters */ #define MOTOR_PORT B #define MOTOR_PCR 12 #define MOTOR_MUX 0b001 #define FILTER_PORT B #d...