AirControlValve/Device/adc.c

/* Copyright Statement:
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 * This software/firmware and related documentation ("AutoChips Software") are
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/**********<Incldue>**********/
#include "adc.h"
#include "timer.h"
#include "math.h"
#include "uart.h"
#include "string.h"

/*********<Variable>********/
uint8_t g_dmaFinish = 0;//DMA传输完成
uint8_t g_halfDmaFinish = 0; //DMA传输半完成
uint8_t g_dmaTransError = 0; //DMA传输错误
uint16_t __align(2) g_ADCValueBuffer[ADC_SAMPLE_CHANNEL*ADC_FILTER_NUM] = {0};
uint32_t g_timer0Cnt = 0;
//uint32_t g_averageSampleValue = 0;

static uint8_t printfBuff[64];
static uint16_t printfLen = 0;


/**
 * ADC_DMACallback
 *
 * @param[in]  wpara:dmaChannelStatus 
 *             lpara:0
 * @return 0
 *
 * @brief ADC DMA中断回调函数。
 */

void ADC_DMACallback(void *device, uint32_t wpara, uint32_t lpara)
{
    /*
     wparam为DMA通道状态，状态含义可参考CHANNELx_STATUS寄存器，
     CHANNELx_STATUS[2] 传输错误
     CHANNELx_STATUS[1] 半传输完成（相对设置的transferNum，如果半传输中断有使能，transferNum设为6，则DATA_TRANS_NUM为3时产生中断，进入回调）
     CHANNELx_STATUS[0] 传输完成
    */
    if ((wpara & 0x01) == 0x1)
    {
        g_dmaFinish = 1;
    }
    if ((wpara & 0x02) == 0x2)
    {
        g_halfDmaFinish = 1;
    }
    if ((wpara & 0x04) == 0x4)
    {
        g_dmaTransError = 1;
    }
}
/**
 * ADC_DMAInit
 *
 * @param[in] void
 * @return void
 *
 * @brief ADC DMA初始化，配置DMA相关参数。
 */
void ADC_DMAInit(void)
{
    DMA_ConfigType tmpDMAConfig;
    memset(&tmpDMAConfig, 0x00, sizeof(DMA_ConfigType));
    
	
    tmpDMAConfig.channelEn = ENABLE;                     ///<使能DMAx通道
    tmpDMAConfig.finishInterruptEn = ENABLE;                   ///<使能DMA传输完成中断
    tmpDMAConfig.halfFinishInterruptEn = DISABLE;               ///<去能DMA半传输完成中断
    tmpDMAConfig.errorInterruptEn = ENABLE;                    ///<使能DMA传输错误中断
    tmpDMAConfig.channelPriority = DMA_PRIORITY_VERY_HIGH;///<设置DMA通道优先级，0~3 ：优先级由低到高
    tmpDMAConfig.circular = ENABLE;                      ///<使能循环模式，如果只想工作一次，设为0即可。
    tmpDMAConfig.direction = DMA_READ_FROM_PERIPH;          ///<0: 从外设读取，1：从存储器读取
    tmpDMAConfig.MEM2MEM = DISABLE;                     ///<0：在非存储器与存储器之间传输，1：在存储器与存储器之间传输
    tmpDMAConfig.memByteMode = DMA_MEM_BYTE_MODE_1TIME;  ///<MEM字分割传输数，0:32-bit,1:16-bit[15:0]; 2:16-bit[23:16][7:0];3:8-bit。详情可参考AC781X芯片手册  表20-2 可编程数据宽度&数据对齐 
    tmpDMAConfig.memIncrement = ENABLE;                  ///<1:MEM地址增加
    tmpDMAConfig.periphIncrement = DISABLE;               ///<0：外设地址固定
    tmpDMAConfig.memSize = DMA_MEM_SIZE_16BIT;           ///<0:8-bit,1:16-bit,2:32-bit
    tmpDMAConfig.periphSize = DMA_PERIPH_SIZE_16BIT;     ///<0:8-bit,1:16-bit,2:32-bit
    tmpDMAConfig.transferNum = ADC_SAMPLE_CHANNEL*ADC_FILTER_NUM;         ///<DMA通道传输长度
    tmpDMAConfig.periphSelect = DMA_PEPIRH_ADC0;  //外设选择
		tmpDMAConfig.periphStartAddr = (uint32_t)(&(ADC0->RDR)); ///<Move ADC DR to memory
		
		tmpDMAConfig.memStartAddr = (uint32_t)g_ADCValueBuffer; //设置DMA开始地址
    tmpDMAConfig.memEndAddr = (uint32_t)g_ADCValueBuffer+sizeof(g_ADCValueBuffer);//设置DMA结束地址
    tmpDMAConfig.callBack = ADC_DMACallback; ///<设置DMA中断回调

    DMA_Init(DMA0_CHANNEL2, &tmpDMAConfig);                     		 ///<ADC 使用DMA1通道，每个模块对应的DMA通道，可参考 AC781X芯片手册 表20-1 DMA请求列表
    
		NVIC_SetPriority(DMA0_CHANNEL2_IRQn, 3);
		NVIC_ClearPendingIRQ(DMA0_CHANNEL2_IRQn);
		NVIC_EnableIRQ(DMA0_CHANNEL2_IRQn);                              ///<使能DMA1中断请求
}
/**
 * CTU_Config
 *
 * @param[in] void
 * @return void
 *
 * @brief 配置CTU模块，Timer0触发ADC规则组采样。
 */
void CTU_Config(void)
{
    CTU_ConfigType ctuConfig;
    memset(&ctuConfig, 0x00, sizeof(ctuConfig));
    ctuConfig.uart0RxFilterEn = DISABLE;  //去能UART0_RX滤波
    ctuConfig.rtcCaptureEn = DISABLE;  //去能RTC捕获
    ctuConfig.acmpCaptureEn = DISABLE;  //去能ACMP捕获
    ctuConfig.uart0RxCaptureEn = DISABLE;  //去能UART0_RX捕获
    ctuConfig.uartTxModulateEn = DISABLE;  //去能UART0_TX调制
    ctuConfig.clkPsc = CTU_CLK_PRESCALER_1;  //分频
    ctuConfig.adcRegularTriggerSource = CTU_TRIGGER_ADC_TIMER_CH0_OVERFLOW; //Timer0触发ADC规则组采样。
    ctuConfig.delay0Time = 0;  //触发延迟
//    ctuConfig.adcInjectTriggerSource = CTU_TRIGGER_ADC_PWM0_INIT;  // 
//    ctuConfig.delay1Time = 0;
//    ctuConfig.pwdt0In3Source = CTU_PWDT_IN3_SOURCE_UART0_RX;
//    ctuConfig.pwdt1In3Source = CTU_PWDT_IN3_SOURCE_UART0_RX; 
    CTU_Init(&ctuConfig);
}


/**
 * ADC_init
 *
 * @param[in] void
 * @return void
 *
 * @brief 初始化ADC,配置ADC参数。
 */
void ADC_init()
{
    ADC_ConfigType tempAdcConfig;
    ADC_ConfigType* adcConfig;
    adcConfig = &tempAdcConfig;
	
    //配置PINMUX
    //GPIO_SetFunc(GPIOA, GPIO_PIN2, GPIO_FUN2);///<ADC_IN8 Analog function enable
	
   
    adcConfig->scanModeEn = ENABLE;                   //扫描模式
    adcConfig->continousModeEn = DISABLE;             //连续模式
    adcConfig->regularDiscontinousModeEn = DISABLE;   //1：打开规则组间断转换模式
    adcConfig->injectDiscontinousModeEn = DISABLE;    //1：打开注入组间断转换模式
    adcConfig->injectAutoModeEn = DISABLE;            //1：自动注入模式
    adcConfig->intervalModeEn = DISABLE;              //1：注入组为间隔转换模式
    adcConfig->regularDiscontinousNum = 0;            //
    adcConfig->EOCInterruptEn = DISABLE;              //EOC中断去能
    adcConfig->IEOCInterruptEn = DISABLE;             //IEOC中断去能
    adcConfig->interruptEn = DISABLE;                 //去能中断
    adcConfig->regularDMAEn = ENABLE;                 //使能ADC DMA
    adcConfig->regularTriggerMode = ADC_TRIGGER_EXTERNAL;//ADC触发源，外部触发
    //adcConfig->injectTriggerMode = ADC_TRIGGER_INTERNAL; //ADC触发源，内部触发
    adcConfig->regularSequenceLength = ADC_SAMPLE_CHANNEL;               //规则组长度设为1
    //adcConfig->injectSequenceLength = 0;               //注入组长度设为0
    adcConfig->dataAlign = ADC_DATA_ALIGN_RIGHT;       //右对齐
    adcConfig->powerMode = ADC_POWER_ON;               //上电
		adcConfig->clkPsc = ADC_CLK_PRESCALER_1; ///<Set ADC Clk = 24M/2/(0+1)
		
    ADC_Init(ADC0, adcConfig);                      ///<ADC works Mode Config
    /*
        ADC转换率计算公式：
        转换时间= 采样时间+转换时间+同步时间
        转换时间= (SPT+12)/ADC模块时钟频率+5/APB时钟频率
        备注：
        1.同步时间为5个APB CLK。
        2.ADC时钟频率 = APB时钟频率 /(分频系数+1)
	*/
	
		ADC_SetRegularGroupChannel(ADC0, ADC_CH_0, ADC_SPT_CLK_7, 0);  //set ADC_CH_7 为第1个采样序列 NTC 温度采集
		ADC_SetRegularGroupChannel(ADC0, ADC_CH_7, ADC_SPT_CLK_7, 1);  //set ADC_CH_7 为第2个采样序列 压力传感器 
		
    //ADC_SetRegularGroupChannel(ADC0, ADC_CH_7, ADC_SPT_CLK_7, 1);  //set ADC_CH_7 为第2个采样序列 线性hall 1
		//ADC_SetRegularGroupChannel(ADC0, ADC_CH_8, ADC_SPT_CLK_7, 2); ///set ADC_CH_8 为第3个采样序列 线性hall 2 
    //ADC_SetRegularGroupChannel(ADC0, ADC_CH_BANDGAP, ADC_SPT_CLK_7, 2); ///set ADC_CH_BANDGAP 为第3个采样序列
    //ADC_SetRegularGroupChannel(ADC0, ADC_CH_TSENSOR, ADC_SPT_CLK_7, 3); ///set ADC_CH_TSENSOR 为第4个采样序列
		
    ADC_DMAInit();   //ADC DMA初始化
}

float getTemperature(void)
{
	uint32_t NtcAdc = 0;
	uint8_t i;
	float Rt = 0; 		//NTC 电阻
	float R = 50000;	//50K 固定阻值电阻 
	float T0 = 273.15+25;	//转换为开尔文温度 
	float B=3950;  		//B值 
	float Ka=273.15;	//K值
	float Vr=0;	 			//电压值 
	float temp = 0;
	
	for(i=0; i<ADC_FILTER_NUM; i++){
		NtcAdc += g_ADCValueBuffer[ADC_SAMPLE_CHANNEL*i];
	}
	
	NtcAdc = NtcAdc/ADC_FILTER_NUM;
	
	Vr = (float)(3.3*NtcAdc/4096);
	Rt = (3.3-Vr)*50000/Vr;
	
	temp=1/(1/T0+log(Rt/R)/B)-Ka+0.5; //计算温度
	
	return temp;
}

float getPressure(void)
{
		uint32_t Adc = 0;
		uint8_t i;
		float v;
	
		for(i=0; i<ADC_FILTER_NUM; i++){
			Adc += g_ADCValueBuffer[ADC_SAMPLE_CHANNEL*i+1];
		}
		
		Adc = Adc/ADC_FILTER_NUM;
		v = 3.3*Adc/4096;
		
		return ((v-0.5)*350/2.0 - 100);
		
}

void printTempPress(void)
{

	printfLen = snprintf((char*)printfBuff, 64, "ADC temp: %f, Press:%f \r\n", getTemperature(),getPressure());
	rs485_TransmitData(printfBuff, printfLen);
	
}



void  getHallValue(uint16_t* pHall_1, uint16_t* pHall_2)
{
	int16_t hall1_ADC = 0;
	int16_t hall2_ADC = 0;
	int8_t i;
	
	for(i=0; i<ADC_FILTER_NUM; i++){
		hall1_ADC += g_ADCValueBuffer[3*i+1];
		hall2_ADC += g_ADCValueBuffer[3*i+2];
	}
	
	*pHall_1 = hall1_ADC/ADC_FILTER_NUM;
	*pHall_2 = hall2_ADC/ADC_FILTER_NUM;

}


int16_t getHalldiff(void)
{
	int16_t hall1_ADC = 0;
	int16_t hall2_ADC = 0;
	int8_t i;
	
	for(i=0; i<ADC_FILTER_NUM; i++){
		hall1_ADC += g_ADCValueBuffer[3*i+1];
		hall2_ADC += g_ADCValueBuffer[3*i+2];
	}
	
	hall1_ADC = hall1_ADC/ADC_FILTER_NUM;
	hall2_ADC = hall2_ADC/ADC_FILTER_NUM;
	
	return (hall1_ADC - hall2_ADC);
	
}


void printADCValue(void)
{
   uint8_t index;
    printf("\r\n adc sample data is:");
    for (index = 0; index<ADC_SAMPLE_CHANNEL*ADC_FILTER_NUM; index++)
    {
        printf("  0x%x",g_ADCValueBuffer[index]);
    }
    printf(",  g_timer0Cnt:%d \r\n", g_timer0Cnt);
}


float getBatteryVoltage(void)
{
	uint16_t sum = 0;
	uint8_t i;
	for(i=0; i<ADC_FILTER_NUM; i++){
		sum += g_ADCValueBuffer[2*i];
	}
	
	sum = sum/ADC_FILTER_NUM;
	return ((6.6*sum)/4096);
}


float getMotorCurrent(void)
{
	uint16_t sum = 0;
	uint8_t i;
	for(i=0; i<ADC_FILTER_NUM; i++){
		sum += g_ADCValueBuffer[2*i+1];
	}
	
	sum = sum/ADC_FILTER_NUM;
	return ((3.3*sum)/4096);
}

/**
 * ADC_SampleTimerTrigerRegular
 *
 * @param[in] void
 * @return void
 *
 * @brief Timer定时触发规则组ADC_CHANNEL0单次采样。
 */
void ADCSample_Init(void)
{
    CTU_Config();
    ADC_init();
    Timer0_Init();
}

/**********<End>*********/