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/mcu.h | 147 +++++--------------------------------------------------------
 1 file changed, 11 insertions(+), 136 deletions(-)

(limited to 'arch/mcu.h')

diff --git a/arch/mcu.h b/arch/mcu.h
index 3b2b974..2080ea9 100644
--- a/arch/mcu.h
+++ b/arch/mcu.h
@@ -5,145 +5,20 @@
 
 // This helps abstract away the differences between various attiny MCUs.
 
-// auto-detect eeprom size from avr-libc headers
-#ifndef EEPROM_SIZE
-    #ifdef E2SIZE
-        #define EEPROM_SIZE E2SIZE
-    #elif defined(E2END)
-        #define EEPROM_SIZE (E2END+1)
-    #endif
-#endif
-
-/******************** hardware-specific values **************************/
-#if (ATTINY == 13)
-    #define F_CPU 4800000UL
-    #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 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 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 DELAY_ZERO_TIME 1020
-#else
-    #error Hey, you need to define ATTINY.
-#endif
-
-
+#include <avr/eeprom.h>
 #include <avr/interrupt.h>
+#include <avr/io.h>
+#include <avr/power.h>
+#include <avr/sleep.h>
+#include <avr/wdt.h>
 
-/******************** I/O pin and register layout ************************/
-#ifdef HWDEFFILE
-#include "fsm/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"
+// for consistency, ROM_SIZE + EEPROM_SIZE
+#define ROM_SIZE  PROGMEM_SIZE
 
-#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;
+#include "fsm/tk.h"
 
-#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
+#define MCU_H arch/MCUNAME.h
+#define MCU_C arch/MCUNAME.c
+#include incfile(MCU_H)
 
-- 
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