请写出用STM32设计一个含有2秒定时器，并在定时时间到时，通过连接在ADC1的通道16上的STM32F103内部温度传感器获取芯片内部的温度，然后用DMA传输方式通过串口显示采集到的温度的过程的详细操作步骤

好的，我会根据您的要求给出详细的操作步骤，以下是具体实现步骤：

1. 配置定时器：使用TIM2作为定时器，配置定时时间为2秒，使用中断方式触发定时器中断。具体配置方法如下：

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
TIM_TimeBaseInitStruct.TIM_Prescaler = SystemCoreClock/1000 - 1;
TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStruct.TIM_Period = 2000 - 1;
TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStruct.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStruct);

TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
NVIC_EnableIRQ(TIM2_IRQn);

2. 配置ADC：使用ADC1，通道16连接内部温度传感器。具体配置方法如下：

RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

ADC_InitTypeDef ADC_InitStruct;
ADC_StructInit(&ADC_InitStruct);
ADC_InitStruct.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStruct.ADC_ContinuousConvMode = DISABLE;
ADC_InitStruct.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
ADC_InitStruct.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Rising;
ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStruct.ADC_NbrOfConversion = 1;
ADC_Init(ADC1, &ADC_InitStruct);

ADC_RegularChannelConfig(ADC1, ADC_Channel_16, 1, ADC_SampleTime_28Cycles);

ADC_TempSensorVrefintCmd(ENABLE);

ADC_Cmd(ADC1, ENABLE);

3. 配置DMA：使用DMA1，通道1，将ADC1的DR寄存器的值传输到指定的内存地址。具体配置方法如下：

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

DMA_InitTypeDef DMA_InitStruct;
DMA_StructInit(&DMA_InitStruct);
DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t)&(ADC1->DR);
DMA_InitStruct.DMA_MemoryBaseAddr = (uint32_t)&adc_value;
DMA_InitStruct.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStruct.DMA_BufferSize = 1;
DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStruct.DMA_Mode = DMA_Mode_Circular;
DMA_InitStruct.DMA_Priority = DMA_Priority_High;
DMA_InitStruct.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStruct);

DMA_Cmd(DMA1_Channel1, ENABLE);

4. 配置串口：使用USART1，波特率为115200，通过DMA方式发送数据。具体配置方法如下：

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);

USART_InitTypeDef USART_InitStruct;
USART_StructInit(&USART_InitStruct);
USART_InitStruct.USART_BaudRate = 115200;
USART_InitStruct.USART_WordLength = USART_WordLength_8b;
USART_InitStruct.USART_StopBits = USART_StopBits_1;
USART_InitStruct.USART_Parity = USART_Parity_No;
USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStruct.USART_Mode = USART_Mode_Tx;
USART_Init(USART1, &USART_InitStruct);

USART_Cmd(USART1, ENABLE);

DMA_InitTypeDef DMA_InitStruct;
DMA_StructInit(&DMA_InitStruct);
DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t)&(USART1->DR);
DMA_InitStruct.DMA_MemoryBaseAddr = (uint32_t)&tx_buffer;
DMA_InitStruct.DMA_DIR = DMA_DIR_MemoryToPeripheral;
DMA_InitStruct.DMA_BufferSize = 0;
DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStruct.DMA_Mode = DMA_Mode_Normal;
DMA_InitStruct.DMA_Priority = DMA_Priority_Medium;
DMA_InitStruct.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel4, &DMA_InitStruct);

USART_DMACmd(USART1, USART_DMAReq_Tx, ENABLE);

5. 在定时器中断中启动一次ADC转换，并等待DMA传输完成后将采集到的温度值发送到串口。具体操作方法如下：

void TIM2_IRQHandler(void)
{
    if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
    {
        TIM_ClearITPendingBit(TIM2, TIM_IT_Update);

        ADC_SoftwareStartConv(ADC1);
        while (DMA_GetFlagStatus(DMA1_FLAG_TC1) == RESET);
        DMA_ClearFlag(DMA1_FLAG_TC1);

        sprintf((char*)tx_buffer, "Temperature: %d.%d C\r\n", adc_value/10, adc_value%10);
        DMA_SetCurrDataCounter(DMA1_Channel4, strlen((char*)tx_buffer));
        DMA_Cmd(DMA1_Channel4, ENABLE);
    }
}

以上就是用STM32设计一个含有2秒定时器，并在定时时间到时，通过连接在ADC1的通道16上的STM32F103内部温度传感器获取芯片内部的温度，然后用DMA传输方式通过串口显示采集到的温度的详细操作步骤。