#include <cstdio>
#include "hardware/watchdog.h"
#include "badger2040.hpp"

#define MP_OBJ_TO_PTR2(o, t) ((t *)(uintptr_t)(o))

extern "C" {
#include "badger2040.h"
#include "py/builtin.h"
#include "py/mpthread.h"

extern uint32_t badger_buttons_on_wake;

static bool Badger2040_wake_state_any() {
    return badger_buttons_on_wake > 0;
}

static bool Badger2040_wake_state_get(uint32_t pin) {
    return badger_buttons_on_wake & (0b1 << pin);
}

static bool Badger2040_wake_state_get_once(uint32_t pin) {
    uint32_t mask = 0b1 << pin;
    bool value = badger_buttons_on_wake & mask;
    badger_buttons_on_wake &= ~mask;
    return value;
}


std::string mp_obj_to_string_r(const mp_obj_t &obj) {
    if(mp_obj_is_str_or_bytes(obj)) {
        GET_STR_DATA_LEN(obj, str, str_len);
        return (const char*)str;
    }
    else if(mp_obj_is_float(obj))
        mp_raise_TypeError("can't convert 'float' object to str implicitly");
    else if(mp_obj_is_int(obj))
        mp_raise_TypeError("can't convert 'int' object to str implicitly");
    else if(mp_obj_is_bool(obj))
        mp_raise_TypeError("can't convert 'bool' object to str implicitly");
    else
        mp_raise_TypeError("can't convert object to str implicitly");
}

typedef struct _mp_obj_float_t {
    mp_obj_base_t base;
    mp_float_t value;
} mp_obj_float_t;

const mp_obj_float_t const_float_1 = {{&mp_type_float}, 1.0f};

/********** WS2812 **********/

/***** Variables Struct *****/
typedef struct _Badger2040_obj_t {
    mp_obj_base_t base;
    pimoroni::Badger2040* badger2040;
    void *buf;
} _Badger2040_obj_t;

_Badger2040_obj_t *badger2040_obj;

/***** Print *****/
void Badger2040_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
    (void)kind; // Unused input parameter
    (void)self_in;
    //_Badger2040_obj_t *self = MP_OBJ_TO_PTR2(self_in, _Badger2040_obj_t);
    mp_print_str(print, "Badger2040( ");
    mp_print_str(print, " )");
}

/***** Destructor ******/
mp_obj_t Badger2040___del__(mp_obj_t self_in) {
    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(self_in, _Badger2040_obj_t);
    // Try to ensure power is cut off when soft reset (IE: "Stop" in Thonny)
    self->badger2040->power_off();
    delete self->badger2040;
    return mp_const_none;
}

/***** Constructor *****/
mp_obj_t Badger2040_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
    enum { ARG_buffer };
    static const mp_arg_t allowed_args[] = {
        { MP_QSTR_buffer, MP_ARG_OBJ, {.u_obj = nullptr} }
    };

    // Parse args.
    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
    mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

    int width = 296;
    int height = 128;

    uint8_t *buffer = nullptr;

    if (args[ARG_buffer].u_obj) {
        mp_buffer_info_t bufinfo;
        mp_get_buffer_raise(args[ARG_buffer].u_obj, &bufinfo, MP_BUFFER_RW);
        buffer = (uint8_t *)bufinfo.buf;
        if(bufinfo.len < (size_t)(width * height / 8)) {
            mp_raise_ValueError("Supplied buffer is too small!");
        }
    } else {
        buffer = m_new(uint8_t, width * height / 8);
    }

    badger2040_obj = m_new_obj_with_finaliser(_Badger2040_obj_t);
    badger2040_obj->base.type = &Badger2040_type;
    badger2040_obj->buf = buffer;
    badger2040_obj->badger2040 = new pimoroni::Badger2040(buffer);
    badger2040_obj->badger2040->init();

    return MP_OBJ_FROM_PTR(badger2040_obj);
}

mp_obj_t Badger2040_is_busy(mp_obj_t self_in) {
    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(self_in, _Badger2040_obj_t);
    return self->badger2040->is_busy() ? mp_const_true : mp_const_false;
}

mp_obj_t Badger2040_update_speed(mp_obj_t self_in, mp_obj_t speed) {
    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(self_in, _Badger2040_obj_t);
    self->badger2040->update_speed(mp_obj_get_int(speed));
    return mp_const_none;
}

mp_obj_t Badger2040_update(mp_obj_t self_in) {
    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(self_in, _Badger2040_obj_t);

    while(self->badger2040->is_busy()) {
#ifdef MICROPY_EVENT_POLL_HOOK
MICROPY_EVENT_POLL_HOOK
#endif
    }

    absolute_time_t t_end = make_timeout_time_ms(self->badger2040->update_time());
    self->badger2040->update(false);

    // Ensure blocking for the minimum amount of time
    // in cases where "is_busy" is unreliable.
    while(self->badger2040->is_busy() || absolute_time_diff_us(get_absolute_time(), t_end) > 0) {
#ifdef MICROPY_EVENT_POLL_HOOK
MICROPY_EVENT_POLL_HOOK
#endif
    }

    self->badger2040->power_off();

    return mp_const_none;
}

mp_obj_t Badger2040_partial_update(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
    enum { ARG_self, ARG_x, ARG_y, ARG_w, ARG_h };
    static const mp_arg_t allowed_args[] = {
        { MP_QSTR_, MP_ARG_REQUIRED | MP_ARG_OBJ },
        { MP_QSTR_x, MP_ARG_REQUIRED | MP_ARG_INT },
        { MP_QSTR_y, MP_ARG_REQUIRED | MP_ARG_INT },
        { MP_QSTR_w, MP_ARG_REQUIRED | MP_ARG_INT },
        { MP_QSTR_h, MP_ARG_REQUIRED | MP_ARG_INT }
    };

    // Parse args.
    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

    int x = args[ARG_x].u_int;
    int y = args[ARG_y].u_int;
    int w = args[ARG_w].u_int;
    int h = args[ARG_h].u_int;

    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(args[ARG_self].u_obj, _Badger2040_obj_t);


    while(self->badger2040->is_busy()) {
#ifdef MICROPY_EVENT_POLL_HOOK
MICROPY_EVENT_POLL_HOOK
#endif
    }

    absolute_time_t t_end = make_timeout_time_ms(self->badger2040->update_time());
    self->badger2040->partial_update(x, y, w, h);

    // Ensure blocking for the minimum amount of time
    // in cases where "is_busy" is unreliable.
    while(self->badger2040->is_busy() || absolute_time_diff_us(t_end, get_absolute_time()) > 0) {
#ifdef MICROPY_EVENT_POLL_HOOK
MICROPY_EVENT_POLL_HOOK
#endif
    }

    self->badger2040->power_off();

    return mp_const_none;
}

mp_obj_t Badger2040_woken_by_button() {
    return Badger2040_wake_state_any() ? mp_const_true : mp_const_false;
}

mp_obj_t Badger2040_halt(mp_obj_t self_in) {
    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(self_in, _Badger2040_obj_t);

    // Don't use the Badger halt so we can allow Micropython to be interrupted.
    gpio_put(pimoroni::Badger2040::ENABLE_3V3, 0);

    self->badger2040->update_button_states();
    while (self->badger2040->button_states() == 0) {
#ifdef MICROPY_EVENT_POLL_HOOK
MICROPY_EVENT_POLL_HOOK
#endif
      self->badger2040->update_button_states();
    }
    //watchdog_reboot(0, SRAM_END, 0);

    return mp_const_none;
}
// sleep

mp_obj_t Badger2040_invert(mp_obj_t self_in, mp_obj_t invert) {
    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(self_in, _Badger2040_obj_t);
    self->badger2040->invert(invert == mp_const_true);
    return mp_const_none;
}

mp_obj_t Badger2040_led(mp_obj_t self_in, mp_obj_t brightness) {
    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(self_in, _Badger2040_obj_t);
    self->badger2040->led(mp_obj_get_int(brightness));
    return mp_const_none;
}

mp_obj_t Badger2040_font(mp_obj_t self_in, mp_obj_t font) {
    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(self_in, _Badger2040_obj_t);
    self->badger2040->font(mp_obj_to_string_r(font));
    return mp_const_none;
}

mp_obj_t Badger2040_pen(mp_obj_t self_in, mp_obj_t color) {
    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(self_in, _Badger2040_obj_t);
    self->badger2040->pen(mp_obj_get_int(color));
    return mp_const_none;
}

mp_obj_t Badger2040_thickness(mp_obj_t self_in, mp_obj_t thickness) {
    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(self_in, _Badger2040_obj_t);
    self->badger2040->thickness(mp_obj_get_int(thickness));
    return mp_const_none;
}

mp_obj_t Badger2040_pressed(mp_obj_t self_in, mp_obj_t button) {
    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(self_in, _Badger2040_obj_t);
    self->badger2040->update_button_states();
    bool wake_state = Badger2040_wake_state_get_once(mp_obj_get_int(button));
    bool state = self->badger2040->pressed(mp_obj_get_int(button));
    return (state || wake_state) ? mp_const_true : mp_const_false;
}

mp_obj_t Badger2040_pressed_to_wake(mp_obj_t button) {
    bool state = Badger2040_wake_state_get(mp_obj_get_int(button));
    return state ? mp_const_true : mp_const_false;
}

// pressed
// pressed_to_wake
// wait_for_press - implement in terms of MicroPython!
// update_button_states
// button_states

mp_obj_t Badger2040_clear(mp_obj_t self_in) {
    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(self_in, _Badger2040_obj_t);
    self->badger2040->clear();
    return mp_const_none;
}

mp_obj_t Badger2040_pixel(mp_obj_t self_in, mp_obj_t x, mp_obj_t y) {
    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(self_in, _Badger2040_obj_t);
    self->badger2040->pixel(mp_obj_get_int(x), mp_obj_get_int(y));
    return mp_const_none;
}

mp_obj_t Badger2040_command(mp_obj_t self_in, mp_obj_t reg, mp_obj_t data) {
    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(self_in, _Badger2040_obj_t);

    mp_buffer_info_t bufinfo;
    mp_get_buffer_raise(data, &bufinfo, MP_BUFFER_RW);

    self->badger2040->debug_command(mp_obj_get_int(reg), bufinfo.len, (const uint8_t *)bufinfo.buf);
    return mp_const_none;
}

mp_obj_t Badger2040_line(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
    enum { ARG_self, ARG_x1, ARG_y1, ARG_x2, ARG_y2 };
    static const mp_arg_t allowed_args[] = {
        { MP_QSTR_, MP_ARG_REQUIRED | MP_ARG_OBJ },
        { MP_QSTR_x1, MP_ARG_REQUIRED | MP_ARG_INT },
        { MP_QSTR_y1, MP_ARG_REQUIRED | MP_ARG_INT },
        { MP_QSTR_x2, MP_ARG_REQUIRED | MP_ARG_INT },
        { MP_QSTR_r2, MP_ARG_REQUIRED | MP_ARG_INT }
    };

    // Parse args.
    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

    int x1 = args[ARG_x1].u_int;
    int y1 = args[ARG_y1].u_int;
    int x2 = args[ARG_x2].u_int;
    int y2 = args[ARG_y2].u_int;

    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(args[ARG_self].u_obj, _Badger2040_obj_t);
    self->badger2040->line(x1, y1, x2, y2);

    return mp_const_none;
}

mp_obj_t Badger2040_rectangle(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
    enum { ARG_self, ARG_x1, ARG_y1, ARG_x2, ARG_y2 };
    static const mp_arg_t allowed_args[] = {
        { MP_QSTR_, MP_ARG_REQUIRED | MP_ARG_OBJ },
        { MP_QSTR_x, MP_ARG_REQUIRED | MP_ARG_INT },
        { MP_QSTR_y, MP_ARG_REQUIRED | MP_ARG_INT },
        { MP_QSTR_w, MP_ARG_REQUIRED | MP_ARG_INT },
        { MP_QSTR_h, MP_ARG_REQUIRED | MP_ARG_INT }
    };

    // Parse args.
    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

    int x = args[ARG_x1].u_int;
    int y = args[ARG_y1].u_int;
    int w = args[ARG_x2].u_int;
    int h = args[ARG_y2].u_int;

    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(args[ARG_self].u_obj, _Badger2040_obj_t);
    self->badger2040->rectangle(x, y, w, h);

    return mp_const_none;
}

mp_obj_t Badger2040_image(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
    enum { ARG_self, ARG_data, ARG_w, ARG_h, ARG_x, ARG_y };
    static const mp_arg_t allowed_args[] = {
        { MP_QSTR_, MP_ARG_REQUIRED | MP_ARG_OBJ },
        { MP_QSTR_data, MP_ARG_REQUIRED | MP_ARG_OBJ },

        { MP_QSTR_w, MP_ARG_INT, {.u_int = 296} },
        { MP_QSTR_h, MP_ARG_INT, {.u_int = 128} },
        { MP_QSTR_x, MP_ARG_INT, {.u_int = 0} },
        { MP_QSTR_y, MP_ARG_INT, {.u_int = 0} }
    };

    // Parse args.
    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

    int dw = args[ARG_w].u_int;
    int dh = args[ARG_h].u_int;
    int dx = args[ARG_x].u_int;
    int dy = args[ARG_y].u_int;

    mp_buffer_info_t bufinfo;
    mp_get_buffer_raise(args[ARG_data].u_obj, &bufinfo, MP_BUFFER_RW);
    if(bufinfo.len < (size_t)(dw * dh / 8)) {
        mp_raise_ValueError("image: Supplied buffer is too small!");
    }

    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(args[ARG_self].u_obj, _Badger2040_obj_t);
    self->badger2040->image((uint8_t *)bufinfo.buf, dw, dh, dx, dy);

    return mp_const_none;   
}

mp_obj_t Badger2040_icon(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
    enum { ARG_self, ARG_data, ARG_icon_index, ARG_sheet_size, ARG_icon_size, ARG_dx, ARG_dy };
    static const mp_arg_t allowed_args[] = {
        { MP_QSTR_, MP_ARG_REQUIRED | MP_ARG_OBJ },
        { MP_QSTR_data, MP_ARG_REQUIRED | MP_ARG_OBJ },
        { MP_QSTR_icon_index, MP_ARG_REQUIRED | MP_ARG_INT },
        { MP_QSTR_sheet_size, MP_ARG_REQUIRED | MP_ARG_INT },
        { MP_QSTR_icon_size, MP_ARG_INT, {.u_int = 64} },

        { MP_QSTR_dx, MP_ARG_INT, {.u_int = 0} },
        { MP_QSTR_dy, MP_ARG_INT, {.u_int = 0} }
    };

    // Parse args.
    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

    int ssize = args[ARG_sheet_size].u_int;
    int isize = args[ARG_icon_size].u_int;
    int index = args[ARG_icon_index].u_int;
    int dx = args[ARG_dx].u_int;
    int dy = args[ARG_dy].u_int;

    mp_buffer_info_t bufinfo;
    mp_get_buffer_raise(args[ARG_data].u_obj, &bufinfo, MP_BUFFER_RW);
        if(bufinfo.len < (size_t)(ssize * isize / 8)) {
        mp_raise_ValueError("icon: Supplied buffer is too small!");
    }

    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(args[ARG_self].u_obj, _Badger2040_obj_t);
    self->badger2040->icon((uint8_t *)bufinfo.buf, ssize, isize, index, dx, dy);

    return mp_const_none;   
}


mp_obj_t Badger2040_text(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
    enum { ARG_self, ARG_message, ARG_x, ARG_y, ARG_scale, ARG_rotation };
    static const mp_arg_t allowed_args[] = {
        { MP_QSTR_, MP_ARG_REQUIRED | MP_ARG_OBJ },
        { MP_QSTR_message, MP_ARG_REQUIRED | MP_ARG_OBJ },
        { MP_QSTR_x, MP_ARG_REQUIRED | MP_ARG_INT },
        { MP_QSTR_y, MP_ARG_REQUIRED | MP_ARG_INT },
        { MP_QSTR_scale, MP_ARG_OBJ, {.u_obj = mp_const_none} },
        { MP_QSTR_rotation, MP_ARG_OBJ, {.u_obj = mp_const_none} }
    };

    // Parse args.
    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

    std::string message = mp_obj_to_string_r(args[ARG_message].u_obj);
    int x = args[ARG_x].u_int;
    int y = args[ARG_y].u_int;
    float scale = 1.0f;
    if (args[ARG_scale].u_obj != mp_const_none) {
        scale = mp_obj_get_float(args[ARG_scale].u_obj);
    }
    float rotation = 0.0f;
    if (args[ARG_rotation].u_obj != mp_const_none) {
        rotation = mp_obj_get_float(args[ARG_rotation].u_obj);
    }

    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(args[ARG_self].u_obj, _Badger2040_obj_t);
    self->badger2040->text(message, x, y, scale, rotation);

    return mp_const_none;
}

mp_obj_t Badger2040_glyph(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
    enum { ARG_self, ARG_char, ARG_x, ARG_y, ARG_scale, ARG_rotation };
    static const mp_arg_t allowed_args[] = {
        { MP_QSTR_, MP_ARG_REQUIRED | MP_ARG_OBJ },
        { MP_QSTR_char, MP_ARG_REQUIRED | MP_ARG_INT },
        { MP_QSTR_x, MP_ARG_REQUIRED | MP_ARG_INT },
        { MP_QSTR_y, MP_ARG_REQUIRED | MP_ARG_INT },
        { MP_QSTR_scale, MP_ARG_OBJ, {.u_obj = mp_const_none} },
        { MP_QSTR_rotation, MP_ARG_OBJ, {.u_obj = mp_const_none} }
    };

    // Parse args.
    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

    int c = args[ARG_char].u_int;
    int x = args[ARG_x].u_int;
    int y = args[ARG_y].u_int;
    float scale = 1.0f;
    if (args[ARG_scale].u_obj != mp_const_none) {
        scale = mp_obj_get_float(args[ARG_scale].u_obj);
    }
    float rotation = 0.0f;
    if (args[ARG_rotation].u_obj != mp_const_none) {
        rotation = mp_obj_get_float(args[ARG_rotation].u_obj);
    }

    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(args[ARG_self].u_obj, _Badger2040_obj_t);
    self->badger2040->glyph(c, x, y, scale, rotation);

    return mp_const_none;
}

mp_obj_t Badger2040_measure_text(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
    enum { ARG_self, ARG_message, ARG_scale };
    static const mp_arg_t allowed_args[] = {
        { MP_QSTR_, MP_ARG_REQUIRED | MP_ARG_OBJ },
        { MP_QSTR_message, MP_ARG_REQUIRED | MP_ARG_OBJ },
        { MP_QSTR_scale, MP_ARG_OBJ, {.u_obj = mp_const_none} },
    };

    // Parse args.
    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

    std::string message = mp_obj_to_string_r(args[ARG_message].u_obj);
    float scale = 1.0f;
    if (args[ARG_scale].u_obj != mp_const_none) {
        scale = mp_obj_get_float(args[ARG_scale].u_obj);
    }

    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(args[ARG_self].u_obj, _Badger2040_obj_t);
    return mp_obj_new_int(self->badger2040->measure_text(message, scale));
}

mp_obj_t Badger2040_measure_glyph(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
    enum { ARG_self, ARG_char, ARG_scale };
    static const mp_arg_t allowed_args[] = {
        { MP_QSTR_, MP_ARG_REQUIRED | MP_ARG_OBJ },
        { MP_QSTR_char, MP_ARG_REQUIRED | MP_ARG_INT },
        { MP_QSTR_scale, MP_ARG_OBJ, {.u_obj = mp_const_none} },
    };

    // Parse args.
    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

    int c = args[ARG_char].u_int;
    float scale = 1.0f;
    if (args[ARG_scale].u_obj != mp_const_none) {
        scale = mp_obj_get_float(args[ARG_scale].u_obj);
    }

    _Badger2040_obj_t *self = MP_OBJ_TO_PTR2(args[ARG_self].u_obj, _Badger2040_obj_t);
    return mp_obj_new_int(self->badger2040->measure_glyph(c, scale));
}

#include "hardware/vreg.h"
#include "hardware/clocks.h"
#include "hardware/pll.h"

mp_obj_t Badger2040_system_speed(mp_obj_t speed) {
    uint32_t sys_freq;
    uint32_t selected_speed = mp_obj_get_int(speed);

    if (gpio_get(pimoroni::Badger2040::VBUS_DETECT) && selected_speed < 2) {
      // If on USB never go slower than normal speed.
      selected_speed = 2;
    }

    switch (selected_speed)
    {
    case 4: // TURBO: 250 MHZ, 1.2V
        vreg_set_voltage(VREG_VOLTAGE_1_20);
        set_sys_clock_khz(250000, true);
        return mp_const_none;
    case 3: // FAST: 133 MHZ
        vreg_set_voltage(VREG_VOLTAGE_1_10);
        set_sys_clock_khz(133000, true);
        return mp_const_none;

    default:
    case 2: // NORMAL: 48 MHZ
        vreg_set_voltage(VREG_VOLTAGE_1_10);
        set_sys_clock_48mhz();
        return mp_const_none;

    case 1: // SLOW: 12 MHZ, 1.0V
        sys_freq = 12 * MHZ;
        break;

    case 0: // VERY_SLOW: 3 MHZ, 1.0V
        sys_freq = 3 * MHZ;
        break;
    }


    // Set the configured clock speed, by dividing the USB PLL
    clock_configure(clk_sys,
                    CLOCKS_CLK_SYS_CTRL_SRC_VALUE_CLKSRC_CLK_SYS_AUX,
                    CLOCKS_CLK_SYS_CTRL_AUXSRC_VALUE_CLKSRC_PLL_USB,
                    48 * MHZ,
                    sys_freq);

    clock_configure(clk_peri,
                    0,
                    CLOCKS_CLK_PERI_CTRL_AUXSRC_VALUE_CLK_SYS,
                    sys_freq,
                    sys_freq);

    clock_configure(clk_adc,
                    0,
                    CLOCKS_CLK_ADC_CTRL_AUXSRC_VALUE_CLKSRC_PLL_USB,
                    48 * MHZ,
                    sys_freq);

    // No longer using the SYS PLL so disable it
    pll_deinit(pll_sys);

    // Not using USB so stop the clock
    clock_stop(clk_usb);

    // Drop the core voltage
    vreg_set_voltage(VREG_VOLTAGE_1_00);

    return mp_const_none;
}

}