Написал программу ADC+DMA+USART.Микроконтроллер STM32F407VG. Почему-то не работает. Не могу понять почему… Суть программы: При подаче напряжения на выход АЦП, DMA2 передает данные в память после чего DMA1 передает данные в USART3 который шлет все в PC

/*******************************************************************/
#include "stm32f4xx.h"
#include "stm32f4xx_rcc.h"
#include "stm32f4xx_gpio.h"
#include "stm32f4xx_adc.h"
#include "stm32f4xx_exti.h"
#include "stm32f4xx_syscfg.h"
#include "stm32f4xx_usart.h"
#include "stm32f4xx_dma.h"
#include "misc.h"
/*******************************************************************/
uint16_t adc_buffer[64];
void ADC_INIT(void)
{
//ADC Initialization
ADC_InitTypeDef  ADC_InitStructure;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_Ext_IT11;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfConversion = 1;
ADC_Init(ADC1, &ADC_InitStructure);

ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 1, ADC_SampleTime_3Cycles);
ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);

//ADC On to work with DMA
ADC_DMACmd(ADC1, ENABLE);
ADC_Cmd(ADC1, ENABLE);
}




void USART_INIT(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
USART_InitTypeDef USART_InitStructure;

// USART TX
    GPIO_PinAFConfig(GPIOB, GPIO_PinSource10, GPIO_AF_USART3);
		GPIO_InitStruct.GPIO_Pin = GPIO_Pin_10;
		GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN;
		GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
		GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;

		GPIO_Init(GPIOB, &GPIO_InitStruct);	
	
//USART Initialization
		USART_InitStructure.USART_BaudRate = 115200;
		USART_InitStructure.USART_WordLength = USART_WordLength_8b;
		USART_InitStructure.USART_StopBits = USART_StopBits_1;
		USART_InitStructure.USART_Parity = USART_Parity_No ;
		USART_InitStructure.USART_HardwareFlowControl =USART_HardwareFlowControl_None;
		USART_InitStructure.USART_Mode = USART_Mode_Tx;
		USART_Init(USART3, &USART_InitStructure);
		USART_Cmd(USART3, ENABLE);
		USART_DMACmd(USART3, USART_DMAReq_Tx, ENABLE);
}

void DMA1_USART(void)
{
	DMA_InitTypeDef DMA_InitStructure;
  DMA_InitStructure.DMA_Channel = DMA_Channel_4;  
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&(USART3->DR);
  DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&adc_buffer[0];
  DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
  DMA_InitStructure.DMA_BufferSize = 64;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_PeripheralDataSize_Byte;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
  DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;         
  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
  DMA_Init(DMA1_Stream1, &DMA_InitStructure);
  DMA_Cmd(DMA1_Stream1, ENABLE);
}

void DMA2_INIT(void)
{
DMA_InitTypeDef DMA_InitStructure;
DMA_InitStructure.DMA_Channel = DMA_Channel_0;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) &ADC1->DR;	
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&adc_buffer[0];	
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 64;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA2_Stream0, &DMA_InitStructure);
 
DMA_Cmd(DMA2_Stream0, ENABLE);
DMA_ITConfig(DMA2_Stream0, DMA_IT_TC, ENABLE);   
}

void DMA2_Stream0_IRQHandler(void)
{ 
    DMA_ClearITPendingBit(DMA2_Stream0, DMA_IT_TCIF0);
  }
int main()
{
	NVIC_InitTypeDef NVIC_InitStructure;
	GPIO_InitTypeDef GPIO_InitStruct;
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); 
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);
	
//GPIO Initialization For ADC1
	GPIO_InitStruct.GPIO_Pin = GPIO_Pin_11;
	GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN;
	GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
	GPIO_Init(GPIOE, &GPIO_InitStruct);
	
//Interrapt from DMA
	NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream0_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
	
    while(1)
    {
 	__NOP();
    }

}

Пишу программу на STM32F407VG. Суть следующая. С генератора подается какое то напряжение, АЦП его преобразует и НА плате зажигается диод. НЕ работает непонятно почему. Помогите кто чем может. Укажите на ошибки.
Код программы:

/*******************************************************************/
#include "stm32f4xx.h"
#include "stm32f4xx_rcc.h"
#include "stm32f4xx_gpio.h"
#include "stm32f4xx_adc.h"
#include "stm32f4xx_exti.h"
#include "stm32f4xx_dma.h"
#include "stm32f4xx_usart.h"
#include "misc.h"
/*******************************************************************/

void Init(Void)
{
	GPIO_InitTypeDef gpioE;
	GPIO_InitTypeDef gpio;
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);
	RCC_APB2PeriphClockCmd (RCC_APB2Periph_USART1,ENABLE);
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
	

	gpio.GPIO_Pin = GPIO_Pin_12;
	gpio.GPIO_Mode = GPIO_Mode_OUT;
	gpio.GPIO_OType = GPIO_OType_PP;
	gpio.GPIO_Speed = GPIO_Speed_2MHz;
	GPIO_Init(GPIOC, &gpio);
	
	
	gpioE.GPIO_Pin = GPIO_Pin_11;
	gpioE.GPIO_Mode = GPIO_Mode_AF;
	gpioE.GPIO_OType = GPIO_OType_PP;
	gpioE.GPIO_Speed = GPIO_Speed_2MHz;
	GPIO_Init(GPIOE, &gpioE);
}
void ADC_init(void)
{
 RCC->APB2ENR |= RCC_APB2ENR_ADC1EN;                             

        ADC1->SQR3 = 6;   
				ADC1->CR2 |= ADC_CR2_ADON; 	
        ADC1->CR2 |= ADC_CR2_CONT;
        ADC1->CR2 |= ADC_CR2_EXTSEL_1|ADC_CR2_EXTSEL_2;
				ADC1->CR1 |= ADC_CR1_EOCIE;
}
void ADC1_2_IRQHandler (void)
{
  if (ADC1->SR & ADC_SR_STRT)
	{
		GPIO_WriteBit(GPIOC, GPIO_Pin_12, Bit_SET);
  }
}
int main()
{
Init();
ADC_init();	
	
}