tom dunigan / pwmtst

PWM test F767ZI

main.cpp@0:0393a9702467, 4 months ago (annotated)

Committer:
manitou
Date:
Tue Nov 08 13:13:20 2022 +0000
Revision:
0:0393a9702467
pwmtst F767ZI

Who changed what in which revision?

UserRevisionLine numberNew contents of line
manitou 0:0393a9702467 1 // F767ZI PWM test D6/PE_9 TIM1_CH1 or D13/PA_5 TIM2_CH1
manitou 0:0393a9702467 2
manitou 0:0393a9702467 3 #include "mbed.h"
manitou 0:0393a9702467 4 #define PRREG(z) printf(#z" 0x%x\n",z)
manitou 0:0393a9702467 5
manitou 0:0393a9702467 6 #if 0
manitou 0:0393a9702467 7 PwmOut pwm(D6);
manitou 0:0393a9702467 8
manitou 0:0393a9702467 9 int main()
manitou 0:0393a9702467 10 {
manitou 0:0393a9702467 11 printf("D6 PE_9\n");
manitou 0:0393a9702467 12 // specify period first, then everything else
manitou 0:0393a9702467 13 // pwm.period(0.001f); // second period
manitou 0:0393a9702467 14 //pwm.write(0.50f); // 50% duty cycle
manitou 0:0393a9702467 15
manitou 0:0393a9702467 16 // manual 1 mhz
manitou 0:0393a9702467 17 PRREG(RCC->APB2ENR);
manitou 0:0393a9702467 18 PRREG(GPIOE->AFR[1]); //alt PE_9
manitou 0:0393a9702467 19 TIM1->PSC = 0;
manitou 0:0393a9702467 20 TIM1->ARR = 216-1;
manitou 0:0393a9702467 21 TIM1->CCR1 = 216/2;
manitou 0:0393a9702467 22 TIM1->CNT = 0;
manitou 0:0393a9702467 23 TIM1->CR1 = 1;
manitou 0:0393a9702467 24
manitou 0:0393a9702467 25 PRREG(TIM1->CR1);
manitou 0:0393a9702467 26 PRREG(TIM1->PSC);
manitou 0:0393a9702467 27 PRREG(TIM1->ARR);
manitou 0:0393a9702467 28 PRREG(TIM1->CCR1);
manitou 0:0393a9702467 29
manitou 0:0393a9702467 30 while (1); // led flashing
manitou 0:0393a9702467 31 }
manitou 0:0393a9702467 32 #else
manitou 0:0393a9702467 33 PwmOut pwm(D13), led(LED2);
manitou 0:0393a9702467 34
manitou 0:0393a9702467 35 int main()
manitou 0:0393a9702467 36 {
manitou 0:0393a9702467 37 printf("D13 PA_5\n");
manitou 0:0393a9702467 38 // specify period first, then everything else
manitou 0:0393a9702467 39 //pwm.period(0.001f); // second period
manitou 0:0393a9702467 40 //pwm.write(0.50f); // 50% duty cycle
manitou 0:0393a9702467 41
manitou 0:0393a9702467 42 // manual 1 mhz
manitou 0:0393a9702467 43 PRREG(RCC->APB1ENR);
manitou 0:0393a9702467 44 PRREG(GPIOA->AFR[0]); //alt PA_5
manitou 0:0393a9702467 45 TIM2->PSC = 0;
manitou 0:0393a9702467 46 TIM2->ARR = 108-1;
manitou 0:0393a9702467 47 TIM2->CCR1 = 108/2;
manitou 0:0393a9702467 48 TIM2->CNT = 0; // need this
manitou 0:0393a9702467 49 TIM2->CR1 = TIM_CR1_CEN;
manitou 0:0393a9702467 50
manitou 0:0393a9702467 51 PRREG(TIM2->CR1);
manitou 0:0393a9702467 52 PRREG(TIM2->PSC);
manitou 0:0393a9702467 53 PRREG(TIM2->ARR);
manitou 0:0393a9702467 54 PRREG(TIM2->CCR1);
manitou 0:0393a9702467 55
manitou 0:0393a9702467 56 printf("us_ticker\n");
manitou 0:0393a9702467 57 PRREG(TIM5->CR1); // us_ticker
manitou 0:0393a9702467 58 PRREG(TIM5->PSC);
manitou 0:0393a9702467 59 PRREG(TIM5->ARR);
manitou 0:0393a9702467 60 PRREG(TIM5->CCR1);
manitou 0:0393a9702467 61 PRREG(TIM5->CNT);
manitou 0:0393a9702467 62
manitou 0:0393a9702467 63 led.period(0.5);
manitou 0:0393a9702467 64 led.write(0.5);
manitou 0:0393a9702467 65 while (1); // led flashing
manitou 0:0393a9702467 66 }
manitou 0:0393a9702467 67 #endif