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hwdef-gchart-fet1-t1616.h
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hwdef-gchart-fet1-t1616.h
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#ifndef HWDEF_GCH_FET1_T1616_H
#define HWDEF_GCH_FET1_T1616_H
/* gChart's custom FET+1 driver layout
PB0 - PWM for FET (TCA - WO0)
PB1 - PWM for 7135 (TCA - WO1)
PB2 - Switch pin, internal pullup
PB3 - Aux LED with 4700 Ohm series resistor
Read voltage from VCC pin, has diode with ~0.4v drop
*/
#define LAYOUT_DEFINED
#ifdef ATTINY
#undef ATTINY
#endif
#define ATTINY 1616
#include <avr/io.h>
#define PWM_CHANNELS 2
#ifndef SWITCH_PIN
#define SWITCH_PIN PIN2_bp
#define SWITCH_PORT VPORTB.IN
#define SWITCH_ISC_REG PORTB.PIN2CTRL
#define SWITCH_VECT PORTB_PORT_vect
#define SWITCH_INTFLG VPORTB.INTFLAGS
#endif
// 7135 channel
#ifndef PWM1_PIN
#define PWM1_PIN PB1 //
#define PWM1_LVL TCA0.SINGLE.CMP1 // CMP1 is the output compare register for PB1
#endif
// FET channel
#ifndef PWM2_PIN
#define PWM2_PIN PB0 //
#define PWM2_LVL TCA0.SINGLE.CMP0 // CMP0 is the output compare register for PB0
#endif
// average drop across diode on this hardware
#ifndef VOLTAGE_FUDGE_FACTOR
#define VOLTAGE_FUDGE_FACTOR 8 // 4 = add 0.20V
#endif
// lighted button
#ifndef AUXLED_PIN
#define AUXLED_PIN PIN3_bp
#define AUXLED_PORT PORTB
#endif
// 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
_PROTECTED_WRITE( CLKCTRL.MCLKCTRLB, CLKCTRL_PDIV_2X_gc | CLKCTRL_PEN_bm );
//VPORTA.DIR = 0b00000010;
VPORTB.DIR = PIN0_bm | PIN1_bm | PIN3_bm;
//VPORTC.DIR = 0b00000000;
// enable pullups on the input pins to reduce power
PORTA.PIN0CTRL = PORT_PULLUPEN_bm;
PORTA.PIN1CTRL = PORT_PULLUPEN_bm;
PORTA.PIN2CTRL = PORT_PULLUPEN_bm;
PORTA.PIN3CTRL = PORT_PULLUPEN_bm;
PORTA.PIN4CTRL = PORT_PULLUPEN_bm;
PORTA.PIN5CTRL = PORT_PULLUPEN_bm;
PORTA.PIN6CTRL = PORT_PULLUPEN_bm;
PORTA.PIN7CTRL = PORT_PULLUPEN_bm;
//PORTB.PIN0CTRL = PORT_PULLUPEN_bm; // FET channel
//PORTB.PIN1CTRL = PORT_PULLUPEN_bm; // 7135 channel
PORTB.PIN2CTRL = PORT_PULLUPEN_bm | PORT_ISC_BOTHEDGES_gc; // switch
//PORTB.PIN3CTRL = PORT_PULLUPEN_bm; // Aux LED
PORTB.PIN4CTRL = PORT_PULLUPEN_bm;
PORTB.PIN5CTRL = PORT_PULLUPEN_bm;
PORTC.PIN0CTRL = PORT_PULLUPEN_bm;
PORTC.PIN1CTRL = PORT_PULLUPEN_bm;
PORTC.PIN2CTRL = PORT_PULLUPEN_bm;
PORTC.PIN3CTRL = PORT_PULLUPEN_bm;
// set up the PWM
// https://ww1.microchip.com/downloads/en/DeviceDoc/ATtiny1614-16-17-DataSheet-DS40002204A.pdf
// PB0 is TCA0:WO0, use TCA_SINGLE_CMP0EN_bm
// PB1 is TCA0:WO1, use TCA_SINGLE_CMP1EN_bm
// PB2 is TCA0:WO2, use TCA_SINGLE_CMP2EN_bm
// For Fast (Single Slope) PWM use TCA_SINGLE_WGMODE_SINGLESLOPE_gc
// For Phase Correct (Dual Slope) PWM use TCA_SINGLE_WGMODE_DSBOTTOM_gc
// See the manual for other pins, clocks, configs, portmux, etc
TCA0.SINGLE.CTRLB = TCA_SINGLE_CMP0EN_bm | TCA_SINGLE_CMP1EN_bm | TCA_SINGLE_WGMODE_DSBOTTOM_gc;
TCA0.SINGLE.PER = 255;
TCA0.SINGLE.CTRLA = TCA_SINGLE_CLKSEL_DIV1_gc | TCA_SINGLE_ENABLE_bm;
}
#endif