path: root/Smol Watch Project/My Project/watch-library/watch.c

/*
 * watch.c
 *
 * Created: 4/25/2021 10:22:10 AM
 *  Author: joeycastillo
 */ 

#include "watch.h"
#include "driver_init.h"
#include <stdlib.h>
#include <string.h>

void watch_init(Watch *watch) {
	memset(watch, 0, sizeof(*watch));
	SUPC->VREG.bit.SEL = 1;
	while(!SUPC->STATUS.bit.VREGRDY);
}

const uint8_t Character_Set[] =
{
    0b00000000, //  
    0b00000000, // !
    0b00100010, // "
    0b00000000, // #
    0b00000000, // $
    0b00000000, // %
    0b01000100, // &
    0b00100000, // '
    0b00000000, // (
    0b00000000, // )
    0b00000000, // *
    0b11000000, // +
    0b00010000, // ,
    0b01000000, // -
    0b00000100, // .
    0b00010010, // /
    0b00111111, // 0
    0b00000110, // 1
    0b01011011, // 2
    0b01001111, // 3
    0b01100110, // 4
    0b01101101, // 5
    0b01111101, // 6
    0b00000111, // 7
    0b01111111, // 8
    0b01101111, // 9
    0b00000000, // :
    0b00000000, // ;
    0b01011000, // <
    0b01001000, // =
    0b01001100, // >
    0b01010011, // ?
    0b11111111, // @
    0b01110111, // A
    0b01111111, // B
    0b00111001, // C
    0b00111111, // D
    0b01111001, // E
    0b01110001, // F
    0b00111101, // G
    0b01110110, // H
    0b10001001, // I
    0b00001110, // J
    0b11101010, // K
    0b00111000, // L
    0b10110111, // M
    0b00110111, // N
    0b00111111, // O
    0b01110011, // P
    0b01100111, // Q
    0b11110111, // R
    0b01101101, // S
    0b10000001, // T
    0b00111110, // U
    0b00111110, // V
    0b10111110, // W
    0b01111110, // X
    0b01101110, // Y
    0b00011011, // Z
    0b00111001, // [
    0b00100100, // backslash
    0b00001111, // ]
    0b00100110, // ^
    0b00001000, // _
    0b00000010, // `
    0b01011111, // a
    0b01111100, // b
    0b01011000, // c
    0b01011110, // d
    0b01111011, // e
    0b01110001, // f
    0b01101111, // g
    0b01110100, // h
    0b00010000, // i
    0b01000010, // j
    0b11101010, // k
    0b00110000, // l
    0b10110111, // m
    0b01010100, // n
    0b01011100, // o
    0b01110011, // p
    0b01100111, // q
    0b01010000, // r
    0b01101101, // s
    0b01111000, // t
    0b01100010, // u
    0b01100010, // v
    0b10111110, // w
    0b01111110, // x
    0b01101110, // y
    0b00011011, // z
    0b00111001, // {
    0b00110000, // |
    0b00001111, // }
    0b00000001, // ~
};

void watch_enable_display(Watch *watch) {
	if (watch->display_enabled) return;

	static const uint64_t segmap[] = {
		0x4e4f0e8e8f8d4d0d, // Position 8
		0xc8c4c4c8b4b4b0b,  // Position 9
		0xc049c00a49890949, // Position 6
		0xc048088886874707, // Position 7
		0xc053921252139352, // Position 0
		0xc054511415559594, // Position 1
		0xc057965616179716, // Position 2
		0xc041804000018a81, // Position 3
		0xc043420203048382, // Position 4
		0xc045440506468584, // Position 5
	};
	watch->num_chars = 10;
	watch->segment_map = &segmap[0];

	SEGMENT_LCD_0_init();
	slcd_sync_enable(&SEGMENT_LCD_0);
	watch->display_enabled = true;
}

void watch_display_pixel(Watch *watch, uint8_t com, uint8_t seg) {
	slcd_sync_seg_on(&SEGMENT_LCD_0, SLCD_SEGID(com, seg));
}

void watch_clear_pixel(Watch *watch, uint8_t com, uint8_t seg) {
	slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(com, seg));
}

void watch_display_character(Watch *watch, uint8_t character, uint8_t position) {
	uint64_t segmap = watch->segment_map[position];
	uint64_t segdata = Character_Set[character - 0x20];

	for (int i = 0; i < 8; i++) {
		uint8_t com = (segmap & 0xFF) >> 6;
		if (com > 2) {
			// COM3 means no segment exists; skip it.
			segmap = segmap >> 8;
			segdata = segdata >> 1;
			continue;
		}
		uint8_t seg = segmap & 0x3F;
		slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(com, seg));
		if (segdata & 1) slcd_sync_seg_on(&SEGMENT_LCD_0, SLCD_SEGID(com, seg));
		segmap = segmap >> 8;
		segdata = segdata >> 1;
	}
}

void watch_display_string(Watch *watch, char *string, uint8_t position) {
	size_t i = 0;
	while(string[i] != 0) {
		watch_display_character(watch, string[i], position + i);
		i++;
		if (i >= watch->num_chars) break;
	}
}

void watch_enable_buttons(Watch *watch) {
	EXTERNAL_IRQ_0_init();
}

void watch_register_button_callback(Watch *watch, const uint32_t pin, ext_irq_cb_t callback) {
	ext_irq_register(pin, callback);
}

void watch_enable_led(Watch *watch) {
	if (watch->led_enabled) return;

	PWM_0_init();
	pwm_set_parameters(&PWM_0, 10000, 0);
	pwm_enable(&PWM_0);
	
	watch->led_enabled = true;
	watch_set_led_off();
}

void watch_disable_led(Watch *watch) {
	if (!watch->led_enabled) return;

	gpio_set_pin_function(RED, GPIO_PIN_FUNCTION_OFF);
	gpio_set_pin_function(GREEN, GPIO_PIN_FUNCTION_OFF);

	pwm_disable(&PWM_0);
	
	watch->led_enabled = false;
}

void watch_set_led_color(uint16_t red, uint16_t green) {
	TC3->COUNT16.CC[0].reg = red;
	TC3->COUNT16.CC[1].reg = green;
}

void watch_set_led_red() {
	watch_set_led_color(65535, 0);
}

void watch_set_led_green() {
	watch_set_led_color(0, 65535);
}

void watch_set_led_off() {
	watch_set_led_color(0, 0);
}

void watch_enable_date_time(Watch *watch) {
	if (watch->calendar_enabled) return;
	CALENDAR_0_init();
	calendar_enable(&CALENDAR_0);
	
	watch->calendar_enabled = true;
}

void watch_set_date_time(struct calendar_date_time date_time) {
	calendar_set_date(&CALENDAR_0, &date_time.date);
	calendar_set_time(&CALENDAR_0, &date_time.time);
}

void watch_get_date_time(struct calendar_date_time *date_time) {
	calendar_get_date_time(&CALENDAR_0, date_time);
}

static ext_irq_cb_t tick_user_callback;

static void tick_callback(struct calendar_dev *const dev) {
	tick_user_callback();
}

void watch_enable_tick(ext_irq_cb_t callback) {
	tick_user_callback = callback;
	// TODO: rename this method to reflect that it now sets the PER7 interrupt.
	_tamper_register_callback(&CALENDAR_0.device, &tick_callback);
}

void watch_enable_analog(Watch *watch, const uint8_t pin) {
	if (!watch->adc_enabled) ADC_0_init();

	switch (pin) {
		case A0:
			gpio_set_pin_function(A0, PINMUX_PB04B_ADC_AIN12);
			break;
		case A1:
			gpio_set_pin_function(A1, PINMUX_PB01B_ADC_AIN9);
			break;
		case A2:
			gpio_set_pin_function(A2, PINMUX_PB02B_ADC_AIN10);
			break;
		default:
			return;
	}
	gpio_set_pin_direction(pin, GPIO_DIRECTION_OFF);
}

void watch_enable_digital_input(const uint8_t pin) {
	gpio_set_pin_direction(pin, GPIO_DIRECTION_IN);
	gpio_set_pin_function(pin, GPIO_PIN_FUNCTION_OFF);
}

void watch_enable_digital_output(const uint8_t pin) {
	gpio_set_pin_direction(pin, GPIO_DIRECTION_OUT);
	gpio_set_pin_function(pin, GPIO_PIN_FUNCTION_OFF);
}

struct io_descriptor *I2C_0_io;

void watch_enable_i2c(Watch *watch) {
	if (watch->i2c_enabled) return;
	I2C_0_init();
	i2c_m_sync_get_io_descriptor(&I2C_0, &I2C_0_io);
	i2c_m_sync_enable(&I2C_0);
}

void watch_i2c_send(int16_t addr, uint8_t *buf, uint16_t length) {
	i2c_m_sync_set_slaveaddr(&I2C_0, addr, I2C_M_SEVEN);
	io_write(I2C_0_io, buf, length);
}

void watch_i2c_receive(int16_t addr, uint8_t *buf, uint16_t length) {
	i2c_m_sync_set_slaveaddr(&I2C_0, addr, I2C_M_SEVEN);
	io_read(I2C_0_io, buf, length);
}