14bit position sensor version.

Dependencies:   mbed-dev-f303 FastPWM3

hw_setup.cpp

Committer:
benkatz
Date:
2017-03-02
Revision:
20:bf9ea5125d52
Child:
22:60276ba87ac6

File content as of revision 20:bf9ea5125d52:


#include "mbed.h"
#include "hw_setup.h"
#include "hw_config.h"
#include "structs.h"
#include "FastPWM.h"

void Init_PWM(GPIOStruct *gpio){
    
    RCC->AHB1ENR |= RCC_AHB1ENR_GPIOCEN; // enable the clock to GPIOC
    RCC->APB1ENR |= 0x00000001; // enable TIM2 clock
    RCC->APB2ENR |= RCC_APB2ENR_TIM1EN; // enable TIM1 clock

    //GPIOC->MODER = (1 << 8); // set pin 4 to be general purpose output
    gpio->enable = new DigitalOut(ENABLE_PIN);
    gpio->pwm_u = new FastPWM(PIN_U);
    gpio->pwm_v = new FastPWM(PIN_V);
    gpio->pwm_w = new FastPWM(PIN_W);
    
     //ISR Setup     
    
    NVIC_EnableIRQ(TIM1_UP_TIM10_IRQn);   //Enable TIM1 IRQ

    TIM1->DIER |= TIM_DIER_UIE; // enable update interrupt
    TIM1->CR1 = 0x40;//CMS = 10, interrupt only when counting up
    TIM1->CR1 |= TIM_CR1_UDIS;
    TIM1->CR1 |= TIM_CR1_ARPE; // autoreload on, 
    TIM1->RCR |= 0x001; // update event once per up/down count of tim1 
    TIM1->EGR |= TIM_EGR_UG;
 
    //PWM Setup

    TIM1->PSC = 0x0; // no prescaler, timer counts up in sync with the peripheral clock
    //TIM1->ARR = 0x1194; // 20 khz
    TIM1->ARR = 0x8CA;    //40 khz
    TIM1->CCER |= ~(TIM_CCER_CC1NP); //Interupt when low side is on.
    TIM1->CR1 |= TIM_CR1_CEN;    
    
    }

void Init_ADC(void){
        // ADC Setup
     RCC->APB2ENR |= RCC_APB2ENR_ADC2EN; // clock for ADC2
     RCC->APB2ENR |= RCC_APB2ENR_ADC1EN; // clock for ADC1
    RCC->AHB1ENR |= RCC_AHB1ENR_GPIOCEN;//0x0000002; // Enable clock for GPIOC
     
     ADC->CCR = 0x00000006; // Regular simultaneous mode only
     ADC1->CR2 |= ADC_CR2_ADON;//0x00000001; // ADC1 ON
     ADC1->SQR3 = 0x000000A; // use PC_0 as input
     ADC2->CR2 |= ADC_CR2_ADON;//0x00000001; // ADC1 ON
     ADC2->SQR3 = 0x0000000B; // use PC_1 as input
     GPIOC->MODER |= 0x0000000f; // PC_0, PC_1 are analog inputs 

    }

void Init_DAC(void){
     RCC->APB1ENR |= 0x20000000; // Enable clock for DAC
     DAC->CR |= 0x00000001; // DAC control reg, both channels ON
     GPIOA->MODER |= 0x00000300; // PA04 as analog output  
    }

void Init_All_HW(GPIOStruct *gpio){
    Init_PWM(gpio);
    Init_ADC();
    //Init_DAC();
    
    }