Adaptation Panel Reader en Bluetooth

/*

 * File:   main.c

 * Author: Enzo Niro

 *

 * Created on August 28, 2024, 2:39 PM

 */

#define F_CPU   10000000UL

#include <xc.h>

#include <stdint.h>

#include <stdbool.h>

#include <util/delay.h>

#include "defValues.h"

#include "configuration.h"

#include "pins.h"

/*

 TODO list :

 * Test PWM

 * ADC for battery

 * Add USART0 & USART1 (implement TX and RX method)

 */

////////////////////////////////////////////

//Prototypes & Macros

void dimmerSetup(void); //start dimmer

void adcInit(void);                           //Init ADC cfg

#define ADC_START_CONV      ADC0.COMMAND |= 0x01                //Start conversion

#define ADC_READ            ADC0.SAMPLE                         //Get sample value

#define BLUETOOTH_CONNECTED     ((PORTA.IN & STAT2_PIN) >> 4) //Get Bluetooth connected status

////////////////////////////////////////////

int main(void) {

    //PORTA.DIR = 0xFF;

    //PORTA.OUT = 0xFF;

    //PORTA.PIN4CTRL = 0x08 | 0x03; //PULLUP enable and sense on low level...

    //_PROTECTED_WRITE(CLKCTRL.MCLKCTRLA, 0x01); //switch to 20 MHz internal oscillator

    //_PROTECTED_WRITE(CLKCTRL.MCLKCTRLB, 0x19); //switch to 20 MHz internal oscillator

    //SLPCTRL.CTRLA = (0x02 << 1); //standby sleep mode

    //SLPCTRL.CTRLA |= ENABLE_BIT;

    _PROTECTED_WRITE(CLKCTRL.MCLKCTRLB, ENABLE_BIT); //Enable clock prescaler (and divide by 2)

    uint16_t counter = 0;

    _delay_ms(1000);

    ////////////////////////////////////////////////

    //Basic pins setup

    PORTA.OUT = 0x80;

    PORTA.DIR = 0x80;

    PORTB.OUT = 0x00;

    PORTB.DIR = PWM_DIMMER_PIN | BOOT_BL_PIN;   

    ////////////////////////////////////////////////

    ////////////////////////////////////////////////

    //USART Setup

    #ifdef USE_TWO_SERIAL_PORTS

    PORTA.DIR = TX2_PIN; //Only this pin is output, others are input

    PORTB.DIR |= TX1_PIN; //Add TX1 pin as output on PORTB

    //TODO add a method to configure serial port here

    #endif

    ////////////////////////////////////////////////

    ////////////////////////////////////////////////

    //Start ADC

    //adcInit();

    /////////////////////////

    //Boot Bluetooth module

    PORTB.OUT |= BOOT_BL_PIN;

    /////////////////////////

    //Start PWM

    dimmerSetup();

    PORTA.OUT = 0x00;

    _delay_ms(500);

    PORTA.OUT = 0x80;

    _delay_ms(500);

    while(1)

    {

        /*

        if(!BLUETOOTH_CONNECTED) //Check STAT2 pin if not connected 

        {

            //Now we accept setup mode

        }

        */

        /*if((PORTA.IN & 0x10) == 0x00) //button pushed

        {

            //wait a bit

            _delay_ms(500);

            _delay_ms(500);

            SLPCTRL.CTRLA = (0x01 << 1); //standby sleep mode

            SLPCTRL.CTRLA |= ENABLE_BIT;

        }

        PORTA.OUT ^= 0x20;

        counter++;

        _delay_ms(500);*/

    }

    return 0;

}

void adcInit(void)

{

    ADC0.CTRLA = ENABLE_BIT; //Enable register

    ADC0.COMMAND = (ADC_SINGLE_12BIT << 4); //Just use 12 bit resolution (no differential mode)

    ADC0.CTRLB = ADC_PRESCALER; //divide clock for conversion

    ADC0.CTRLC = (ADC_TIMEBASE << 3) | ADC_REF; //Set analog reference

    ADC0.PGACTRL = (ADC_PGA_GAIN << 5) | (ADC_PGA_BIAS << 3) | (ADC_PGA_SMD << 1) | ENABLE_BIT; //set PGA cfg

    ADC0.CTRLE = 0x80; //Set sample duration (SAMPDUR -> p.407)

    ADC0.MUXPOS = (ADC_VIA_PGA << 6) | (ADC_MUX_AIN12); //PC0 connected to AIN12

    ADC0.MUXNEG = (ADC_VIA_DIRECT << 6) | (ADC_MUXN_GND); //Set reference in common mode

}

uint16_t adcGetSample(void)

{

    ADC_START_CONV; //as for a conversion

    _delay_ms(1); //wait a bit

    while(!ADC0.STATUS); //Wait when conversion is now complete

    return ADC_READ; //get stored value

}

void dimmerSetup(void)

{

    TCA0.SINGLE.CTRLA = (PWM_DIV << 1) | ENABLE_BIT; //enable register set PWM frequency (datasheet p.209)

    TCA0.SINGLE.CTRLB = 0x13; //set output frequency in Single-slope PWM

    TCA0.SINGLE.CTRLD = ENABLE_BIT; //enable split mode

    TCA0.SINGLE.CMP0 = PWM_RATE; //set duty cycle

}