#include <stm32f10x.h>
#include <bsp_dac.h>
#include <bsp_uart.h>

void DAC2_Init(void)
{
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);	//enable the clock
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
	DAC_InitTypeDef dac;
	GPIO_InitTypeDef gpio;
	
	gpio.GPIO_Mode = GPIO_Mode_AIN;
	gpio.GPIO_Pin = GPIO_Pin_5;
	GPIO_Init(GPIOA, &gpio);
	
	dac.DAC_Trigger = DAC_Trigger_Software;
	dac.DAC_OutputBuffer = DAC_OutputBuffer_Disable;
	dac.DAC_WaveGeneration = DAC_WaveGeneration_None;
	DAC_Init(DAC_Channel_2, &dac);
	DAC_Cmd(DAC_Channel_2, ENABLE);
}

void DAC2_Output(float vol)
{
	char str[10];
	uint16_t v_data = 4096/3.3 * vol;
	sprintf(str, "%d\n", v_data);
	debug(str);
	DAC_SetChannel2Data(DAC_Align_12b_R, v_data);
	DAC_SoftwareTriggerCmd(DAC_Channel_2, ENABLE);
}