HWDEF_thefreeman_BST_FWAA_MP3432_HDR_DAC_RGB_H

#ifndef HWDEF_thefreeman_BST_FWAA_MP3432_HDR_DAC_RGB_H
#define HWDEF_thefreeman_BST_FWAA_MP3432_HDR_DAC_RGB_H

/* thefreeman’s FWAA AA/li-ion Boost driver based on MP3432 and attiny1616 with high dynamic range and DAC control, AUX : RGB
 * hardware version : 1.0
 *
 *
 * Pin / Name / Function
 *   1    PA2   BattLVL (ADC0 - AIN2)
 *   2    PA3
 *   3    GND   GND
 *   4    VCC   VCC
 *   5    PA4   EN
 *   6    PA5   HDR
 *   7    PA6   DAC
 *   8    PA7
 *   9    PB5   B
 *  10    PB4   G
 *  11    PB3   R
 *  12    PB2   IN- NFET
 *  13    PB1
 *  14    PB0
 *  15    PC0
 *  16    PC1
 *  17    PC2
 *  18    PC3   SWITCH
 *  19    PA0   UDPI
 *  20    PA1
 *
 * EN enable the boost regulator and op-amp
 * DAC pin sets the current, max current depends on Vset voltage divider and Rsense
 * HDR FET pin switches between high value Rsense (low current range, pin low), and low value Rsense (high current range, pin high)
 * IN- NFET : pull up after BST enable to elimiante startup flash, pull down otherwise
 */

#define LAYOUT_DEFINED

#ifdef ATTINY
#undef ATTINY
#endif
#define ATTINY 1616
#include <avr/io.h>

#define PWM_CHANNELS 1
#define USE_DYN_PWM  // dynamic frequency and speed

#ifndef SWITCH_PIN
#define SWITCH_PIN     PIN3_bp
#define SWITCH_PORT    VPORTC.IN
#define SWITCH_ISC_REG PORTC.PIN3CTRL
#define SWITCH_VECT    PORTC_PORT_vect
#define SWITCH_INTFLG  VPORTC.INTFLAGS
#endif

#define PWM1_LVL DAC0.DATA  // use this for DAC voltage output

// PWM parameters of both channels are tied together because they share a counter
#define PWM1_TOP VREF.CTRLA   // holds the TOP value for for variable-resolution PWM


//BST enable
#define LED2_ENABLE_PIN   PIN4_bp
#define LED2_ENABLE_PORT  PORTA_OUT

//HDR
#define LED_ENABLE_PIN   PIN5_bp
#define LED_ENABLE_PORT  PORTA_OUT

//IN- NFET
// TODO

// Voltage divider battLVL
#define USE_VOLTAGE_DIVIDER       // use a dedicated pin, not VCC, because VCC input is flattened
#define DUAL_VOLTAGE_FLOOR    21  // for AA/14500 boost drivers, don't indicate low voltage if below this level
#define DUAL_VOLTAGE_LOW_LOW   7  // the lower voltage range's danger zone 0.7 volts (NiMH)
#define ADMUX_VOLTAGE_DIVIDER ADC_MUXPOS_AIN2_gc  // which ADC channel to read

// Raw ADC readings at 4.4V and 2.2V
// calibrate the voltage readout here
// estimated / calculated values are:
//   (voltage - D1) * (R2/(R2+R1) * 1024 / 1.1)
// Resistors are 330k and 100k
#ifndef ADC_44
#define ADC_44 951  // raw value at 4.40V
#endif
#ifndef ADC_22
#define ADC_22 476  // raw value at 2.20V
#endif



// this driver allows for aux LEDs under the optic
#ifndef AUXLED_R_PIN
#define AUXLED_R_PIN  PIN3_bp
#endif
#ifndef AUXLED_G_PIN
#define AUXLED_G_PIN  PIN4_bp
#endif
#ifndef AUXLED_B_PIN
#define AUXLED_B_PIN  PIN5_bp
#endif

#define AUXLED_RGB_PORT PORTB  // PORTA or PORTB or PORTC





// with so many pins, doing this all with #ifdefs gets awkward...
// ... so just hardcode it in each hwdef file instead
inline void hwdef_setup() {

    // set up the system clock to run at 10 MHz instead of the default 3.33 MHz
    // TODO: for this DAC controlled-light, try to decrease the clock speed or use the ULP
    _PROTECTED_WRITE( CLKCTRL.MCLKCTRLB, CLKCTRL_PDIV_2X_gc | CLKCTRL_PEN_bm );

    VPORTA.DIR = PIN4_bm | PIN5_bm | PIN6_bm; // EN, HDR, DAC
    VPORTB.DIR = PIN2_bm | PIN3_bm | PIN4_bm | PIN5_bm;  // RGB, IN- NFET
    //VPORTC.DIR = PIN0_bm | PIN1_bm;  //



    // enable pullups on the input pins to reduce power
    PORTA.PIN0CTRL = PORT_PULLUPEN_bm; //
    PORTA.PIN1CTRL = PORT_PULLUPEN_bm; //
    //PORTA.PIN2CTRL = PORT_PULLUPEN_bm; // BattLVL
    PORTA.PIN3CTRL = PORT_PULLUPEN_bm; //
    //PORTA.PIN4CTRL = PORT_PULLUPEN_bm; // EN
    //PORTA.PIN5CTRL = PORT_PULLUPEN_bm; // HDR
    //PORTA.PIN6CTRL = PORT_PULLUPEN_bm; // DAC
    PORTA.PIN7CTRL = PORT_PULLUPEN_bm; //

    PORTB.PIN0CTRL = PORT_PULLUPEN_bm; //
    PORTB.PIN1CTRL = PORT_PULLUPEN_bm; //
    //PORTB.PIN2CTRL = PORT_PULLUPEN_bm; // IN- NFET
    //PORTB.PIN3CTRL = PORT_PULLUPEN_bm; // R
    //PORTB.PIN4CTRL = PORT_PULLUPEN_bm; // G
    //PORTB.PIN5CTRL = PORT_PULLUPEN_bm; // B

    PORTC.PIN0CTRL = PORT_PULLUPEN_bm; //
    PORTC.PIN1CTRL = PORT_PULLUPEN_bm; //
    PORTC.PIN2CTRL = PORT_PULLUPEN_bm; //
    PORTC.PIN3CTRL = PORT_PULLUPEN_bm | PORT_ISC_BOTHEDGES_gc; // e-switch

    // set up the DAC
    // https://ww1.microchip.com/downloads/en/DeviceDoc/ATtiny1614-16-17-DataSheet-DS40002204A.pdf
    // DAC ranges from 0V to (255 * Vref) / 256
    VREF.CTRLA |= VREF_DAC0REFSEL_2V5_gc; // also VREF_DAC0REFSEL_0V55_gc and VREF_DAC0REFSEL_1V1_gc and VREF_DAC0REFSEL_2V5_gc
    VREF.CTRLB |= VREF_DAC0REFEN_bm;
    DAC0.CTRLA = DAC_ENABLE_bm | DAC_OUTEN_bm;
    DAC0.DATA = 255; // set the output voltage



}


#endif