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#ifndef TK_ATTINY_H
#define TK_ATTINY_H
/*
* Attiny portability header.
* This helps abstract away the differences between various attiny MCUs.
*
* Copyright (C) 2017 Selene Scriven
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
// Choose your MCU here, or in the main .c file, or in the build script
//#define ATTINY 13
//#define ATTINY 25
/******************** hardware-specific values **************************/
#if (ATTINY == 13)
#define F_CPU 4800000UL
//#define EEPSIZE 64
#define V_REF REFS0
#define BOGOMIPS 950
#define ADMUX_VCC 0b00001100
#define DELAY_ZERO_TIME 252
#define SWITCH_PORT PINB // PINA or PINB or PINC
#define VOLTAGE_ADC_DIDR DIDR0 // this MCU only has one DIDR
#elif (ATTINY == 25)
// TODO: Use 6.4 MHz instead of 8 MHz?
#define F_CPU 8000000UL
//#define EEPSIZE 128
#define V_REF REFS1
#define BOGOMIPS (F_CPU/4000)
#define ADMUX_VCC 0b00001100
#define ADMUX_THERM 0b10001111
#define DELAY_ZERO_TIME 1020
#define SWITCH_PORT PINB // PINA or PINB or PINC
#define VOLTAGE_ADC_DIDR DIDR0 // this MCU only has one DIDR
#elif (ATTINY == 85)
// TODO: Use 6.4 MHz instead of 8 MHz?
#define F_CPU 8000000UL
//#define EEPSIZE 512
#define V_REF REFS1
#define BOGOMIPS (F_CPU/4000)
// (1 << V_REF) | (0 << ADLAR) | (VCC_CHANNEL)
#define ADMUX_VCC 0b00001100
// (1 << V_REF) | (0 << ADLAR) | (THERM_CHANNEL)
#define ADMUX_THERM 0b10001111
#define DELAY_ZERO_TIME 1020
#define SWITCH_PORT PINB // PINA or PINB or PINC
#define VOLTAGE_ADC_DIDR DIDR0 // this MCU only has one DIDR
#elif (ATTINY == 1634)
#define F_CPU 8000000UL
#define V_REF REFS1
#define BOGOMIPS (F_CPU/4000)
// DS table 19-3, 19-4, 1.1V ref / VCC
#define ADMUX_VCC 0b00001101
// (1 << V_REF) | (THERM_CHANNEL)
// DS table 19-3, 19-4, internal sensor / 1.1V ref
#define ADMUX_THERM 0b10001110
#define DELAY_ZERO_TIME 1020
//#define SWITCH_PORT PINA // set this in hwdef
//#define VOLTAGE_ADC_DIDR DIDR0 // set this in hwdef
#else
#error Hey, you need to define ATTINY.
#endif
// auto-detect eeprom size from avr-libc headers
#ifndef EEPSIZE
#ifdef E2SIZE
#define EEPSIZE E2SIZE
#else
#define EEPSIZE (E2END+1)
#endif
#endif
#include <avr/interrupt.h>
/******************** I/O pin and register layout ************************/
#ifdef HWDEFFILE
#include "tk.h"
#include incfile(HWDEFFILE)
#endif
#if 0 // placeholder
#elif defined(NANJG_LAYOUT)
#include "hwdef-nanjg.h"
#elif defined(FET_7135_LAYOUT)
#include "hwdef-FET_7135.h"
#elif defined(TRIPLEDOWN_LAYOUT)
#include "hwdef-Tripledown.h"
#elif defined(FERRERO_ROCHER_LAYOUT)
#include "hwdef-Ferrero_Rocher.h"
#endif // no more recognized driver types
#ifndef LAYOUT_DEFINED
#error Hey, you need to define an I/O pin layout.
#endif
#if (ATTINY==13)
// no changes needed
#elif (ATTINY==25) || (ATTINY==45) || (ATTINY==85)
// use clock_prescale_set(n) instead; it's safer
//#define CLOCK_DIVIDER_SET(n) {CLKPR = 1<<CLKPCE; CLKPR = n;}
#elif (ATTINY==1634)
// make it a NOP for now
// FIXME
//#define clock_prescale_set(x) ((void)0)
//#define clock_prescale_set(n) {cli(); CCP = 0xD8; CLKPR = n; sei();}
//#define clock_prescale_set(n) {cli(); CCP = 0xD8; CLKPR = n; sei();}
inline void clock_prescale_set(uint8_t n) {cli(); CCP = 0xD8; CLKPR = n; sei();}
typedef enum
{
clock_div_1 = 0,
clock_div_2 = 1,
clock_div_4 = 2,
clock_div_8 = 3,
clock_div_16 = 4,
clock_div_32 = 5,
clock_div_64 = 6,
clock_div_128 = 7,
clock_div_256 = 8
} clock_div_t;
#else
#error Unable to define MCU macros.
#endif
#endif // TK_ATTINY_H
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