From 3d12b7066d27b591e0283e20ed066bc66e29fbe4 Mon Sep 17 00:00:00 2001
From: Selene ToyKeeper
Date: Fri, 10 Nov 2023 21:34:40 -0700
Subject: refactor checkpoint: splitting MCU-specific code into arch/$MCU.[ch]

Phew, that's a lot of changes!  And there's still a lot more to do...
---
 arch/attiny85.h | 91 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 arch/attiny85.h

(limited to 'arch/attiny85.h')

diff --git a/arch/attiny85.h b/arch/attiny85.h
new file mode 100644
index 0000000..840079c
--- /dev/null
+++ b/arch/attiny85.h
@@ -0,0 +1,91 @@
+// arch/attiny85.h: attiny85 support header
+// Copyright (C) 2014-2023 Selene ToyKeeper
+// SPDX-License-Identifier: GPL-3.0-or-later
+#pragma once
+
+// fill in missing values from Atmel's headers
+#define PROGMEM_SIZE  8192
+#define EEPROM_SIZE   512
+
+////////// clock speed / delay stuff //////////
+
+// TODO: Use 6.4 MHz instead of 8 MHz?
+#define F_CPU  8000000UL
+#define BOGOMIPS  (F_CPU/4000)
+#define DELAY_ZERO_TIME  1020
+
+///// clock dividers
+// use clock_prescale_set(n) instead; it's safer
+//#define CLOCK_DIVIDER_SET(n) {CLKPR = 1<<CLKPCE; CLKPR = n;}
+
+
+////////// default hw_setup() //////////
+
+// FIXME: fsm/main should call hwdef_setup(), not hw_setup,
+//        and this function should be hwdef_setup
+#ifdef USE_GENERIC_HWDEF_SETUP
+static inline void hwdef_setup();
+#endif
+
+
+////////// ADC voltage / temperature //////////
+
+#define V_REF REFS1
+#define VOLTAGE_ADC_DIDR DIDR0  // this MCU only has one DIDR
+
+// (1 << V_REF) | (0 << ADLAR) | (VCC_CHANNEL)
+#define ADMUX_VCC 0b00001100
+// (1 << V_REF) | (0 << ADLAR) | (THERM_CHANNEL)
+#define ADMUX_THERM 0b10001111
+
+#define hwdef_set_admux_therm  mcu_set_admux_therm
+inline void mcu_set_admux_therm();
+
+#define hwdef_set_admux_voltage mcu_set_admux_voltage
+inline void mcu_set_admux_voltage();
+
+inline void mcu_adc_sleep_mode();
+
+inline void mcu_adc_start_measurement();
+
+inline void mcu_adc_on();
+
+inline void mcu_adc_off();
+
+// NOP because interrupt flag clears itself
+#define mcu_adc_vect_clear()
+
+inline uint16_t mcu_adc_result();
+
+inline uint8_t mcu_adc_lsb();
+
+
+////////// WDT //////////
+
+inline void mcu_wdt_active();
+
+inline void mcu_wdt_standby();
+
+inline void mcu_wdt_stop();
+
+// NOP because interrupt flag clears itself
+#define mcu_wdt_vect_clear()
+
+
+////////// PCINT - pin change interrupt (e-switch) //////////
+
+#define SWITCH_PORT  PINB  // PINA or PINB or PINC
+#define SWITCH_VECT  PCINT0_vect
+
+// NOP because interrupt flag clears itself
+#define mcu_switch_vect_clear()
+
+inline void mcu_pcint_on();
+
+inline void mcu_pcint_off();
+
+
+////////// misc //////////
+
+void reboot();
+
-- 
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