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/*
*********************************************************************************************************
*
* 模块名称 : ADC驱动模块
* 文件名称 : bsp_adc.c
* 版 本 : V1.2
* 说 明 : 实现ADC1和ADC3的双通道示波器，ADC2用于简单的电压采集
* 修改记录 :
* 版本号 日期 作者 说明
* V1.0 2015-01-05 Eric2013 正式发布
* V1.1 2015-12-29 Eric2013 修改函数TIM1_Config中TIM1的初始化。
* V1.2 2018-01-06 Eric2013 修改之前的代码用于二代双通道示波器。
*
* Copyright (C), 2018-2028, 安富莱电子 [url=http://www.armfly.com]www.armfly.com[/url]
*
*********************************************************************************************************
*/
#include "bsp.h"
#include "MainTask.h"
/*
*********************************************************************************************************
* ADC寄存器
*********************************************************************************************************
*/
#define ADC_CDR_ADDRESS ((uint32_t)0x40012308)
#define ADC3_DR_ADDRESS ((uint32_t)0x4001224C)
#define ADC1_DR_ADDRESS ((uint32_t)0x4001204C)
#define ADC2_DR_ADDRESS ((uint32_t)0x4001214C)
/*
*********************************************************************************************************
* ADC1，ADC3的数据缓存，大小均为10240
*********************************************************************************************************
*/
uint16_t ADC1ConvertedValue[10240];
uint16_t ADC3ConvertedValue[10240];
/*
*********************************************************************************************************
* 变量和函数
*********************************************************************************************************
*/
static uint16_t g_usFirstTimeIRQFlag; /* 第一次进入定时器8的中断标志 */
static uint16_t g_usTrigCount = 0; /* 记录普通触发进入看门狗中断时，DMA传输的位置 */
static uint16_t g_usTrigTempFlag = 0; /* 临时变量，用于ADC中断 */
static void Time8Recorder(void);
/*
*********************************************************************************************************
* 函 数 名: TIM1_Config
* 功能说明: 配置定时器1，用于触发ADC1和ADC3。
* 当外部触发信号被选为ADC规则或注入转换时，只有它的上升沿可以启动转换。
* 形 参: 无
* 返 回 值: 无
*********************************************************************************************************
*/
static void TIM1_Config(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
/* 使能定时器1 */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
/* 先禁能再配置 */
TIM_Cmd(TIM1, DISABLE);
/*
********************************************************************************
system_stm32f4xx.c 文件中 void SetSysClock(void) 函数对时钟的配置如下：
HCLK = SYSCLK / 1 (AHB1Periph)
PCLK2 = HCLK / 2 (APB2Periph)
PCLK1 = HCLK / 4 (APB1Periph)
因为APB1 prescaler != 1, 所以 APB1上的TIMxCLK = PCLK1 x 2 = SystemCoreClock / 2;
因为APB2 prescaler != 1, 所以 APB2上的TIMxCLK = PCLK2 x 2 = SystemCoreClock;
APB1 定时器有 TIM2, TIM3 ,TIM4, TIM5, TIM6, TIM7, TIM12, TIM13, TIM14
APB2 定时器有 TIM1, TIM8 ,TIM9, TIM10, TIM11
TIM1 更新周期是 = TIM1CLK / （TIM_Period + 1）/（TIM_Prescaler + 1）
********************************************************************************
*/
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure); //初始化定时器1的寄存器为复位值
TIM_TimeBaseStructure.TIM_Period = 168000000/g_SampleFreqTable[TimeBaseId][0] - 1; //ARR自动重装载寄存器周期的值(定时时间）到设置频率后产生个更新或者中断(也是说定时时间到)
TIM_TimeBaseStructure.TIM_Prescaler = g_SampleFreqTable[TimeBaseId][1]-1; //PSC时钟预分频数 例如：时钟频率=TIM1CLK/(时钟预分频+1)
TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; //CR1->CKD时间分割值
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //CR1->CMS[1:0]和DIR定时器模式 向上计数
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0x0000; /* TIM1 和 TIM8 必须设置 */
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
/**************ADC1的触发***********************************************/
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //CCMR2在向上计数时，一旦TIMx_CNT<TIMx_CCR1时通道1为有效电平，否则为无效电平
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //CCER 输出使能
TIM_OCInitStructure.TIM_Pulse = TIM_TimeBaseStructure.TIM_Period/2;//CCR3同计数器TIMx_CNT的比较，并在OC1端口上产生输出信号
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //CCER输出极性设置
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; /* only for TIM1 and TIM8. 此处和正相引脚不同 */
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; /* only for TIM1 and TIM8. */
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset; /* only for TIM1 and TIM8. */
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset; /* only for TIM1 and TIM8. */
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
/**************ADC3的触发***********************************************/
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = TIM_TimeBaseStructure.TIM_Period-1;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; /* only for TIM1 and TIM8. 此处和正相引脚不同 */
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; /* only for TIM1 and TIM8. */
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset; /* only for TIM1 and TIM8. */
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset; /* only for TIM1 and TIM8. */
TIM_OC3Init(TIM1, &TIM_OCInitStructure);
//TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable); //CMR2 设置预装载使能 更新事件产生时写入有效
//TIM_ARRPreloadConfig(TIM1, ENABLE); //CR1 设置ARR自动重装 更新事件产生时写入有效
TIM_Cmd(TIM1, ENABLE);
/* 使能PWM输出 */
TIM_CtrlPWMOutputs(TIM1, ENABLE);
}
/*
*********************************************************************************************************
* 函 数 名: bsp_InitADC
* 功能说明: ADC初始化
* 形 参: 无
* 返 回 值: 无
*********************************************************************************************************
*/
void bsp_InitADC(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
DMA_InitTypeDef DMA_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* 配置模拟看门狗中断NVIC */
NVIC_InitStructure.NVIC_IRQChannel = ADC_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* 使能 ADC1, ADC2, DMA2 和 GPIO 时钟 ****************************************/
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2 | RCC_AHB1Periph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_ADC2 | RCC_APB2Periph_ADC3, ENABLE);
/* DMA2 Stream1 channel1 配置用于ADC3 **************************************/
//DMA_DeInit(DMA2_Stream1);
DMA_InitStructure.DMA_Channel = DMA_Channel_2;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC3_DR_ADDRESS;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&ADC3ConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 1024*10;
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_PeripheralDataSize_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_Full;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA2_Stream1, &DMA_InitStructure);
DMA_Cmd(DMA2_Stream1, ENABLE);
/* DMA2 Stream0 channel0 配置用于ADC1 **************************************/
//DMA_DeInit(DMA2_Stream0);
DMA_InitStructure.DMA_Channel = DMA_Channel_0;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_ADDRESS;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&ADC1ConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 1024*10;
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_PeripheralDataSize_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_Full;
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);
/* 配置ADC引脚为模拟输入模式******************************/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOC, &GPIO_InitStructure);
/*
***************************************************************************
PCLK2 = HCLK / 2
下面选择的是2分频
ADCCLK = PCLK2 /2 = HCLK / 4 = 168 / 4 = 42M
ADC采样频率： Sampling Time + Conversion Time = 3 + 12 cycles = 15cyc
Conversion Time = 42MHz / 15cyc = 2.8Mbps.
****************************************************************************
*/
/* ADC公共部分初始化**********************************************************/
ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_8Cycles;
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;
ADC_CommonInit(&ADC_CommonInitStructure);
/////////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////
/*ADC3的配置*****************************************************************/
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Rising;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC3;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfConversion = 1;
/* ADC3 规则通道配置 */
ADC_Init(ADC3, &ADC_InitStructure);
ADC_RegularChannelConfig(ADC3, ADC_Channel_10, 1, ADC_SampleTime_3Cycles);
/* 使能 ADC3 DMA */
ADC_DMACmd(ADC3, ENABLE);
/* 配置模拟看门狗的阀值 注意别配置反了，要不一直进入中断 */
ADC_AnalogWatchdogThresholdsConfig(ADC3, 4095, 0);
/* 配置模拟看门狗监测ADC3的通道10 */
ADC_AnalogWatchdogSingleChannelConfig(ADC3, ADC_Channel_10);
/* 使能一个规则通道的看门狗 */
ADC_AnalogWatchdogCmd(ADC3, ADC_AnalogWatchdog_SingleRegEnable);
/* 使能模拟看门狗中断 */
ADC_ITConfig(ADC3, ADC_IT_AWD, ENABLE);
/* 使能DMA请求 (多ADC模式) --------------------------------------------------*/
ADC_DMARequestAfterLastTransferCmd(ADC3, ENABLE);
/* 使能 ADC3 --------------------------------------------------------------*/
ADC_Cmd(ADC3, ENABLE);
/////////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////
/*ADC1的配置******************************************************************/
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Rising;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfConversion = 1;
/* ADC1 规则通道配置 -------------------------------------------------------*/
ADC_Init(ADC1, &ADC_InitStructure);
ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 1, ADC_SampleTime_3Cycles);
/* 使能 ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);
/* 使能DMA请求 (多ADC模式) --------------------------------------------------*/
ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);
/* 使能 ADC1 --------------------------------------------------------------*/
ADC_Cmd(ADC1, ENABLE);
/////////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////
/*ADC2的配置*****************************************************************/
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC2;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfConversion = 1;
/* ADC2 规则通道配置 */
ADC_Init(ADC2, &ADC_InitStructure);
ADC_RegularChannelConfig(ADC2, ADC_Channel_10, 1, ADC_SampleTime_480Cycles);
/* 使能 ADC2 */
ADC_Cmd(ADC2, ENABLE);
/**定时器配置********************************************************************/
TIM1_Config();
}
/*
*********************************************************************************************************
* 函 数 名: DMA_Open
* 功能说明: 使能ADC1，ADC2，ADC3的DMA
* 形 参: 无
* 返 回 值: 无
*********************************************************************************************************
*/
void ADC_DMA_Open(void)
{
DMA_InitTypeDef DMA_InitStructure;
/* DMA2 Stream1 channel1 配置用于ADC3 **************************************/
DMA_DeInit(DMA2_Stream1); /* 在DMA的DMA_Mode_Normal模式，一定要使用这个函数，循环模式可以不用 */
DMA_InitStructure.DMA_Channel = DMA_Channel_2;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC3_DR_ADDRESS;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&ADC3ConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 1024*10;
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_PeripheralDataSize_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_Full;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA2_Stream1, &DMA_InitStructure);
DMA_Cmd(DMA2_Stream1, ENABLE);
/* DMA2 Stream0 channel0 配置用于ADC1 **************************************/
DMA_DeInit(DMA2_Stream0);
DMA_InitStructure.DMA_Channel = DMA_Channel_0;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_ADDRESS;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&ADC1ConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 1024*10;
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_PeripheralDataSize_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_Full;
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);
ADC_RegularChannelConfig(ADC3, ADC_Channel_10, 1, ADC_SampleTime_3Cycles);
/* 使能 ADC3 --------------------------------------------------------------*/
ADC_Cmd(ADC3, ENABLE);
ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 1, ADC_SampleTime_3Cycles);
/* 使能 ADC1 --------------------------------------------------------------*/
ADC_Cmd(ADC1, ENABLE);
/**定时器配置,一定要重新的初始化从而保证同时触发 **/
TIM1_Config();
/* 只有在普通触发模式在启动TIM8的计时功能 */
if(TriggerFlag != 0)
{
Time8Recorder();
}
}
/*
*********************************************************************************************************
* 函 数 名: DMA_Close
* 功能说明: 关闭ADC1，ADC2，ADC3及其DMA
* 形 参: 无
* 返 回 值: 无
*********************************************************************************************************
*/
void ADC_DMA_Close()
{
TIM_Cmd(TIM1, DISABLE);
DMA_Cmd(DMA2_Stream1, DISABLE);
DMA_Cmd(DMA2_Stream0, DISABLE);
/* 禁止 ADC1 ---------------------------------------------------------------------*/
ADC_Cmd(ADC1, DISABLE);
/* 禁止 ADC3 ---------------------------------------------------------------------*/
ADC_Cmd(ADC3, DISABLE);
}
/*
*********************************************************************************************************
* 函 数 名: ADC_IRQHandler
* 功能说明: 模拟看门狗中断服务程序。
* 形 参: 无
* 返 回 值: 无
*********************************************************************************************************
*/
void ADC_IRQHandler()
{
/* 读取DMA剩余要传输的数目 */
g_usTrigCount = DMA2_Stream1->NDTR;
/* 确认是否是ADC3的看门狗中断 */
if((ADC3->SR)&0x01)
{
/* 取触发值的前一个点，查看是否是在阀值范围内，从而判断是上升沿还是下降沿 */
if(g_usTrigCount == 10240)
{
/* 剩余10240表示触发值是ADC3ConvertedValue[10239]是触发值，那么上一个点就是10238 */
g_usTrigTempFlag = ADC3ConvertedValue[10238];
}
else if(g_usTrigCount == 10239)
{
/* 剩余10239表示触发值是ADC3ConvertedValue[0]是触发值，那么上一个点就是10239 */
g_usTrigTempFlag = ADC3ConvertedValue[10239];
}
else
{
/* 剩余10239表示触发值是ADC3ConvertedValue[0]是触发值，那么上一个点就是10239 */
g_usTrigTempFlag = ADC3ConvertedValue[10238 - g_usTrigCount];
}
/* 判断是否是上升沿，是的话开启定时器记录ADC数据 */
if(g_usTrigTempFlag <= g_TrigVol->usTrigValue)
{
/* 关闭ADC3的看门狗中断 */
ADC3->CR1 &= 0xffffffbf;
TriggerFlag = 1;
/* 启动定时器计数 */
TIM8->CR1 |= 0x01;
}
/* 清除挂起标志 */
ADC3->SR &= 0xfe;
}
}
/*
*********************************************************************************************************
* 函 数 名: TIM8_MeasureTrigConfig
* 功能说明: 使用TIM8为普通触发模式下数据采集计时，定时采集触发值前后的1024个ADC数据
* 形 参：无
* 返 回 值: 无
*********************************************************************************************************
*/
/*
每次捕获采集触发值前后的1024个ADC数据(单通道)。
*/
const uint32_t g_TrigFreqTable[][2] =
{
{60, 1024}, //2.8Msps 168000000/2800000 = 60 => 60 * 1024
{84, 1024}, //2Msps 168000000/2000000 = 84 => 84 * 1024
{168, 1024}, //1Msps 168000000/1000000 = 168 => 168 * 1024
{336, 1024}, //500Ksps 168000000/500000 = 336 => 336 * 1024
{840, 1024}, //200Ksps 168000000/200000 = 840 => 840 * 1024
{1680, 1024}, //100Ksps 168000000/100000 = 1680 => 1680 * 1024
{3360, 1024}, //50Ksps 168000000/50000 = 3360 => 3360 * 1024
{8400, 1024}, //20Ksps 168000000/20000 = 8400 => 8400 * 1024
{16800, 1024}, //10Ksps 168000000/10000 = 16800 => 16800 * 1024
{33600, 1024}, //5Ksps 168000000/5000 = 33600 => 33600 * 1024
/* 下面5种采样频率下刷新较慢，因为采集前后1024个ADC的时间较长 */
{42000, 2048}, //2Ksps 168000000/2000 = 84000 => 84000 * 1024
{42000, 4096}, //1Ksps 168000000/1000 = 168000 => 168000 * 1024
{42000, 8192}, //500sps 168000000/500 = 336000 => 336000 * 1024
{42000, 20480}, //200sps 168000000/200 = 840000 => 840000 * 1024
{42000, 40960}, //100sps 168000000/100 = 1680000 => 1680000 * 1024
/* 下面这几种采样率不做触发支持 */
{42000, 40960}, //50sps
{42000, 40960}, //20sps
{42000, 40960}, //10sps
{42000, 40960}, //5sps
{42000, 40960}, //2sps
{42000, 40960}, //1sps
};
void TIM8_MeasureTrigConfig(void)
{
TIM_TimeBaseInitTypeDef TIM_BaseInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* 开启时钟 */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8, ENABLE);
/* 加上第一次进入中断的标志，进入中断后将其置1 */
g_usFirstTimeIRQFlag = 0;
/* 使能定时器8中断 */
NVIC_InitStructure.NVIC_IRQChannel = TIM8_UP_TIM13_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* 定时器配置 */
TimeBaseId = 1; /* 开机后按照ADC单通道1Msps进行配置 */
TIM_DeInit(TIM8);
TIM_BaseInitStructure.TIM_Period = g_TrigFreqTable[TimeBaseId][0] - 1;
TIM_BaseInitStructure.TIM_Prescaler = g_TrigFreqTable[TimeBaseId][1] - 1;
TIM_BaseInitStructure.TIM_ClockDivision = 0;
TIM_BaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM8, &TIM_BaseInitStructure);
TIM_ITConfig(TIM8, TIM_IT_Update, ENABLE);
TIM_Cmd(TIM8, DISABLE);
}
/*
*********************************************************************************************************
* 函 数 名: Time8Recorder
* 功能说明: 使用TIM8为普通触发模式下数据采集计时，定时采集触发值前后的1024个ADC数据
* 形 参：无
* 返 回 值: 无
*********************************************************************************************************
*/
static void Time8Recorder(void)
{
TIM_TimeBaseInitTypeDef TIM_BaseInitStructure;
/* 加上第一次进入中断的标志 */
g_usFirstTimeIRQFlag = 0;
TIM_DeInit(TIM8);
TIM_BaseInitStructure.TIM_Period = g_TrigFreqTable[TimeBaseId][0] - 1;
TIM_BaseInitStructure.TIM_Prescaler = g_TrigFreqTable[TimeBaseId][1] - 1;
TIM_BaseInitStructure.TIM_ClockDivision = 0;
TIM_BaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM8, &TIM_BaseInitStructure);
TIM_ITConfig(TIM8, TIM_IT_Update, ENABLE);
TIM_Cmd(TIM8, DISABLE);
}
/*
*********************************************************************************************************
* 函 数 名: TIM8_UP_TIM13_IRQHandler
* 功能说明: 定时器中断函数
* 形 参: 无
* 返 回 值: 无
*********************************************************************************************************
*/
void TIM8_UP_TIM13_IRQHandler(void)
{
uint16_t i, k, usCurPos;
/* 第一次进入TIM8中断执行退出操作，因为定时器更新中断有个小bug，
一旦初始化了定时器并且使能中断就会有立即进入一次中断的情况，为了防止这种情况的
出现，作如下操作：
*/
if(g_usFirstTimeIRQFlag == 0)
{
g_usFirstTimeIRQFlag = 1;
TIM_ClearITPendingBit(TIM8, TIM_IT_Update);
/* 如果是第一次进入就退出 */
return;
}
/* 定时器时间中断 */
if (TIM_GetITStatus(TIM8, TIM_IT_Update) != RESET)
{
/* 先关闭定时器 */
TIM_Cmd(TIM8, DISABLE);
/* 确保开启的定时器计时采集ADC数据 */
if(TriggerFlag == 1)
{
/* 定时器采集ADC数据结束 */
TriggerFlag = 2;
/* 开启定时器计数前DMA传输数据的位置 */
usCurPos = 10240 - g_usTrigCount;
/*
下面分为三种情况获取6K的数据(三通道，单通道就是前后1024个ADC数据)：
1. 当前的位置 < 1024.
2. 1024 <= 当前的位置 <= 10240 - 1024(9216)
3. 当前位置 > 10240 - 1024(9216)
*/
/* 第一种情况：当前的位置 < 1024. */
if(usCurPos < 1024)
{
k = 1024 - usCurPos;
usCurPos = 10240 - k;
/* 前部分数据 */
for(i = 0; i < k; i++)
{
g_DSO1->usWaveBufTemp[i] = ADC3ConvertedValue[i+usCurPos];
}
usCurPos = i;
k = 10240 - g_usTrigCount + 1024;
/* 后部分数据 */
for(i = 0; i < k; i++)
{
g_DSO1->usWaveBufTemp[i + usCurPos] = ADC3ConvertedValue[i];
}
}
/* 第三种情况：当前位置 > 10240 - 1024(9216) */
else if(usCurPos > 9216)
{
usCurPos = usCurPos - 1024;
/* 采集前1024+g_usTrigCount的数据 */
for(i = 0; i < (g_usTrigCount + 1024); i++)
{
g_DSO1->usWaveBufTemp[i] = ADC3ConvertedValue[i+usCurPos];
}
k = i;
usCurPos = (1024 - g_usTrigCount);
/* 剩余数据的采集 */
for(i = 0; i < usCurPos; i++)
{
g_DSO1->usWaveBufTemp[i + k] = ADC3ConvertedValue[i];
}
}
/* 第二种情况：1024 <= 当前的位置 <= 10240 - 1024(9216) */
else
{
usCurPos = usCurPos - 1024;
for(i = 0; i < 2048; i++)
{
g_DSO1->usWaveBufTemp[i] = ADC3ConvertedValue[i+usCurPos];
}
}
}
TIM_ClearITPendingBit(TIM8, TIM_IT_Update);
}
}
/***************************** 安富莱电子 [url=http://www.armfly.com]www.armfly.com[/url] (END OF FILE) *********************************/
发表于 2024-1-9 16:47:19
发表于 2024-1-10 08:59:05
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