1 files changed, 93 insertions, 0 deletions
diff --git a/arch/avr32dd20.h b/arch/avr32dd20.h
new file mode 100644
index 0000000..7a6b8f1
--- /dev/null
+++ b/arch/avr32dd20.h
@@ -0,0 +1,93 @@
+// arch/avr32dd20.h: avr32dd20 support header
+// Copyright (C) 2023 Selene ToyKeeper
+// SPDX-License-Identifier: GPL-3.0-or-later
+#pragma once
+
+////////// clock speed / delay stuff //////////
+
+#define F_CPU  12000000UL
+#define BOGOMIPS  (F_CPU/3800)
+#define DELAY_ZERO_TIME  1020
+
+inline void mcu_clock_speed();
+
+///// clock dividers
+// this should work, but needs further validation
+inline void clock_prescale_set(uint8_t n);
+
+// TODO: allow hwdef to define a base clock speed,
+//       and adjust these values accordingly
+typedef enum
+{
+    // Actual clock is 12 MHz
+    clock_div_1 =   (0), // 12 MHz
+    clock_div_2 =   (CLKCTRL_PDIV_2X_gc  | CLKCTRL_PEN_bm), // 6 MHz
+    clock_div_4 =   (CLKCTRL_PDIV_4X_gc  | CLKCTRL_PEN_bm), // 3 MHz
+    clock_div_8 =   (CLKCTRL_PDIV_8X_gc  | CLKCTRL_PEN_bm), // 1.5 MHz
+    clock_div_16 =  (CLKCTRL_PDIV_16X_gc | CLKCTRL_PEN_bm), // 0.75 MHz
+    clock_div_32 =  (CLKCTRL_PDIV_32X_gc | CLKCTRL_PEN_bm), // 375 kHz
+    clock_div_64 =  (CLKCTRL_PDIV_64X_gc | CLKCTRL_PEN_bm), // 187.5 kHz
+} clock_div_t;
+
+
+////////// ADC voltage / temperature //////////
+
+#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();
+
+//#define mcu_adc_on  hwdef_set_admux_voltage
+//void mcu_adc_on();
+
+inline void mcu_adc_off();
+
+#define ADC_vect  ADC0_RESRDY_vect
+inline void mcu_adc_vect_clear();
+
+// read ADC differently for temperature and voltage
+#define MCU_ADC_RESULT_PER_TYPE
+
+inline uint16_t mcu_adc_result_temp();
+
+inline uint16_t mcu_adc_result_volts();
+
+inline uint8_t mcu_adc_lsb();
+
+
+////////// WDT //////////
+
+inline void mcu_wdt_active();
+
+inline void mcu_wdt_standby();
+
+inline void mcu_wdt_stop();
+
+#define WDT_vect  RTC_PIT_vect
+inline void mcu_wdt_vect_clear();
+
+
+////////// PCINT - pin change interrupt (e-switch) //////////
+
+// set these in hwdef
+//#define SWITCH_PORT     VPORTD.IN
+//#define SWITCH_VECT     PORTD_PORT_vect
+
+inline void mcu_switch_vect_clear();
+
+inline void mcu_pcint_on();
+
+inline void mcu_pcint_off();
+
+
+////////// misc //////////
+
+void reboot();
+
+inline void prevent_reboot_loop();
+