/*
 * Code generated from Atmel Start.
 *
 * This file will be overwritten when reconfiguring your Atmel Start project.
 * Please copy examples or other code you want to keep to a separate file
 * to avoid losing it when reconfiguring.
 */

#include "driver_init.h"
#include <peripheral_clk_config.h>
#include <utils.h>
#include <hal_init.h>

/*! The buffer size for USART */
#define USART_0_BUFFER_SIZE 16

struct usart_async_descriptor USART_0;
struct timer_descriptor       TIMER_0;

static uint8_t USART_0_buffer[USART_0_BUFFER_SIZE];

struct i2c_m_sync_desc I2C_0;

void EXTERNAL_IRQ_0_init(void)
{
	hri_gclk_write_PCHCTRL_reg(GCLK, EIC_GCLK_ID, CONF_GCLK_EIC_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
	hri_mclk_set_APBAMASK_EIC_bit(MCLK);

	ext_irq_init();
}

/**
 * \brief USART Clock initialization function
 *
 * Enables register interface and peripheral clock
 */
void USART_0_CLOCK_init()
{

	hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM0_GCLK_ID_CORE, CONF_GCLK_SERCOM0_CORE_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
	hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM0_GCLK_ID_SLOW, CONF_GCLK_SERCOM0_SLOW_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));

	hri_mclk_set_APBAMASK_SERCOM0_bit(MCLK);
}

/**
 * \brief USART pinmux initialization function
 *
 * Set each required pin to USART functionality
 */
void USART_0_PORT_init()
{

	gpio_set_pin_function(PA04, PINMUX_PA04D_SERCOM0_PAD0);

	gpio_set_pin_function(PA05, PINMUX_PA05D_SERCOM0_PAD1);
}

/**
 * \brief USART initialization function
 *
 * Enables USART peripheral, clocks and initializes USART driver
 */
void USART_0_init(void)
{
	USART_0_CLOCK_init();
	usart_async_init(&USART_0, SERCOM0, USART_0_buffer, USART_0_BUFFER_SIZE, (void *)NULL);
	USART_0_PORT_init();
}

void I2C_0_PORT_init(void)
{

	gpio_set_pin_pull_mode(PA22,
	                       // <y> Pull configuration
	                       // <id> pad_pull_config
	                       // <GPIO_PULL_OFF"> Off
	                       // <GPIO_PULL_UP"> Pull-up
	                       // <GPIO_PULL_DOWN"> Pull-down
	                       GPIO_PULL_OFF);

	gpio_set_pin_function(PA22, PINMUX_PA22C_SERCOM3_PAD0);

	gpio_set_pin_pull_mode(PA23,
	                       // <y> Pull configuration
	                       // <id> pad_pull_config
	                       // <GPIO_PULL_OFF"> Off
	                       // <GPIO_PULL_UP"> Pull-up
	                       // <GPIO_PULL_DOWN"> Pull-down
	                       GPIO_PULL_OFF);

	gpio_set_pin_function(PA23, PINMUX_PA23C_SERCOM3_PAD1);
}

void I2C_0_CLOCK_init(void)
{
	hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM3_GCLK_ID_CORE, CONF_GCLK_SERCOM3_CORE_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
	hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM3_GCLK_ID_SLOW, CONF_GCLK_SERCOM3_SLOW_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));

	hri_mclk_set_APBBMASK_SERCOM3_bit(MCLK);
}

void I2C_0_init(void)
{
	I2C_0_CLOCK_init();
	i2c_m_sync_init(&I2C_0, SERCOM3);
	I2C_0_PORT_init();
}

/**
 * \brief Timer initialization function
 *
 * Enables Timer peripheral, clocks and initializes Timer driver
 */
static void TIMER_0_init(void)
{
	hri_mclk_set_APBAMASK_TC0_bit(MCLK);
	hri_gclk_write_PCHCTRL_reg(GCLK, TC0_GCLK_ID, CONF_GCLK_TC0_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));

	timer_init(&TIMER_0, TC0, _tc_get_timer());
}

void system_init(void)
{
	init_mcu();

	EXTERNAL_IRQ_0_init();

	USART_0_init();

	I2C_0_init();

	TIMER_0_init();
}