#include <libopencm3/stm32/rcc.h>

#include "clock.h"
#include "libopencm3/stm32/f0/rcc.h"

void init_clock(void)
{
	/* Set STM32 to 48 MHz. */
	rcc_clock_setup_in_hse_8mhz_out_48mhz();    // generate 48 MHz from external 8 MHz crystal
	//rcc_clock_setup_in_hsi_out_48mhz();         // generate ~48 MHz from internal RC oscillator

	// enable TIM1 for PWM generation
	rcc_periph_clock_enable(RCC_TIM1);

	// enable GPIO clocks:
	// Port A is needed for the charge pump, extension port and analog input
	rcc_periph_clock_enable(RCC_GPIOA);

	// Port B is needed for the LEDs
	rcc_periph_clock_enable(RCC_GPIOB);

	// USART1 is used for RS485
	rcc_periph_clock_enable(RCC_USART1);

	// ADC1 for analog measuremnts
	rcc_periph_clock_enable(RCC_ADC1);

	// DMA1 is used for ADC data transfer
	rcc_periph_clock_enable(RCC_DMA1);

	// I2C1 is used for communication with the BMP280
	rcc_periph_clock_enable(RCC_I2C1);
}