From 3489015ff245861355f73674f79801279d95ea39 Mon Sep 17 00:00:00 2001
From: Selene ToyKeeper
Date: Fri, 3 Nov 2023 11:05:59 -0600
Subject: renamed tk*.h to arch/*.h or fsm/*.h (part 1) to get them out of the
 root dir, and to start cleaning up mcu/arch code

---
 arch/mcu.h | 157 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 157 insertions(+)
 create mode 100644 arch/mcu.h

(limited to 'arch/mcu.h')

diff --git a/arch/mcu.h b/arch/mcu.h
new file mode 100644
index 0000000..9532ed5
--- /dev/null
+++ b/arch/mcu.h
@@ -0,0 +1,157 @@
+// tk-attiny.h: Attiny portability header.
+// Copyright (C) 2014-2023 Selene ToyKeeper
+// SPDX-License-Identifier: GPL-3.0-or-later
+#pragma once
+
+// This helps abstract away the differences between various attiny MCUs.
+
+// 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
+#elif (ATTINY == 412) || (ATTINY == 416) || (ATTINY == 417) || (ATTINY == 816) || (ATTINY == 817) || (ATTINY == 1616) || (ATTINY == 1617) || (ATTINY == 3216) || (ATTINY == 3217)
+    #define AVRXMEGA3
+    #define F_CPU 10000000UL
+    #define BOGOMIPS (F_CPU/4700)
+    #define EEPSIZE 128
+    #define DELAY_ZERO_TIME 1020
+#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;
+
+#elif defined(AVRXMEGA3)  // ATTINY816, 817, etc
+    // this should work, but needs further validation
+    inline void clock_prescale_set(uint8_t n) {
+        cli();         
+        CCP = CCP_IOREG_gc; // temporarily disable clock change protection
+        CLKCTRL.MCLKCTRLB = n; // Set the prescaler
+        while (CLKCTRL.MCLKSTATUS & CLKCTRL_SOSC_bm) {} // wait for clock change to finish
+        sei();
+    }
+    typedef enum
+    {
+      // Actual clock is 20 MHz, but assume that 10 MHz is the top speed and work from there
+      // TODO: measure PWM speed and power use at 1.25/2.5/5/10 MHz, to determine which speeds are optimal 
+      clock_div_1 =   (CLKCTRL_PDIV_2X_gc  | CLKCTRL_PEN_bm), // 10 MHz
+      clock_div_2 =   (CLKCTRL_PDIV_4X_gc  | CLKCTRL_PEN_bm), // 5 MHz
+      clock_div_4 =   (CLKCTRL_PDIV_8X_gc  | CLKCTRL_PEN_bm), // 2.5 MHz
+      clock_div_8 =   (CLKCTRL_PDIV_16X_gc | CLKCTRL_PEN_bm), // 1.25 MHz
+      clock_div_16 =  (CLKCTRL_PDIV_32X_gc | CLKCTRL_PEN_bm), // 625 kHz
+      clock_div_32 =  (CLKCTRL_PDIV_64X_gc | CLKCTRL_PEN_bm), // 312 kHz, max without changing to the 32 kHz ULP
+      clock_div_64 =  (CLKCTRL_PDIV_64X_gc | CLKCTRL_PEN_bm), // 312 kHz 
+      clock_div_128 = (CLKCTRL_PDIV_64X_gc | CLKCTRL_PEN_bm), // 312 kHz 
+      clock_div_256 = (CLKCTRL_PDIV_64X_gc | CLKCTRL_PEN_bm)  // 312 kHz 
+    } clock_div_t;
+#else
+#error Unable to define MCU macros.
+#endif
+
-- 
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