STM32L071RB ADC 多通道模式

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hellolinux-2302 发布时间：2018-10-20 20:56

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项目上要用到STM32L071 ,很简单的采集4个通道的ADC值。网上找了一下什么IT模式，DMA模式.....太多了，太麻烦。我们的应用很简单，就是每隔1秒采集一下ADC IN0，ADC IN1，内部参考电压，内部温度传感器4个通道。
首先是ADC初始化，用到了Vrefint，和内部温度传感器。

/* ADC init function */
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void MX_ADC_Init(void)
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{
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ADC_ChannelConfTypeDef sConfig;
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/**Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
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*/
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hadc.Instance = ADC1;/ _- R/ z) {, f0 S! `6 J
hadc.Init.OversamplingMode = DISABLE;
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hadc.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;* X1 s) O0 N e& Y5 C& E7 a
hadc.Init.Resolution = ADC_RESOLUTION_12B;2 ?" A: q7 `# n. H1 ?2 @9 Q
hadc.Init.SamplingTime = ADC_SAMPLETIME_160CYCLES_5;* ~, z9 S9 m$ t/ r, y/ J1 ~
hadc.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD;
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hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;7 t9 h" \+ S& |
hadc.Init.ContinuousConvMode = DISABLE;
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hadc.Init.DiscontinuousConvMode = ENABLE;
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hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;1 w: K. C5 t+ q& H0 z0 i
hadc.Init.ExternalTrigConv = ADC_SOFTWARE_START;
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hadc.Init.DMAContinuousRequests = DISABLE;6 n5 `1 L) t- @0 w( z( {
hadc.Init.EOCSelection = ADC_EOC_SINGLE_CONV;' e% p6 Z$ _2 T } ~
hadc.Init.Overrun = ADC_OVR_DATA_PRESERVED;
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hadc.Init.LowPowerAutoWait = DISABLE; p- c# @. h3 w- W! J% N5 f
hadc.Init.LowPowerFrequencyMode = DISABLE;
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hadc.Init.LowPowerAutoPowerOff = DISABLE;
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if (HAL_ADC_Init(&hadc) != HAL_OK)
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_Error_Handler(__FILE__, __LINE__);2 \) A) P6 }) Q4 a9 V1 ?
}
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/* 校正ADC */& o' H; Q, Y" L g+ u
if(HAL_ADCEx_Calibration_Start(&hadc, ADC_SINGLE_ENDED) != HAL_OK), ` G( h- G1 e( r' j
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_Error_Handler(__FILE__, __LINE__);
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/**Configure for the selected ADC regular channel 0 to be converted.*/5 v- S y" D/ A" l. u2 ~: U
sConfig.Channel = ADC_CHANNEL_0;9 P8 `& f y9 \* V' @
sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
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if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
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{
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_Error_Handler(__FILE__, __LINE__);8 e, n( D$ i& N$ V8 q
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/**Configure for the selected ADC regular channel 1 to be converted.*/7 v$ }0 n' q$ c4 W+ e% x# P. J
sConfig.Channel = ADC_CHANNEL_1;9 d) b5 M3 |" L$ g
if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
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{
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_Error_Handler(__FILE__, __LINE__);
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}
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/**Configure for the selected ADC regular channel 17 to be converted.*/
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sConfig.Channel = ADC_CHANNEL_VREFINT;: I5 w, _; x- u6 u" E; M( [) \5 v
if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
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{
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_Error_Handler(__FILE__, __LINE__);
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}
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/**Configure for the selected ADC regular channel 18 to be converted.*/
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sConfig.Channel = ADC_CHANNEL_TEMPSENSOR;
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if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)" v1 {. e4 n7 E2 m4 q
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_Error_Handler(__FILE__, __LINE__);
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HAL_ADCEx_EnableVREFINT();6 o4 @% K, O, e! \' O: p" a+ L
HAL_ADCEx_EnableVREFINTTempSensor();
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}

复制代码

ADC采样函数

/* Private functions ---------------------------------------------------------*/ N4 ~' Z/ N g8 ]/ X
#define RES1 10000 //分压电阻R1，10K
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#define RES2 10000 //分压电阻R2，10K
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#define PRATIO (RES1+RES2)/(RES2)% v' |) D, K. J7 |/ ^' p6 G
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#define ADC_12BIT 4095.0
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#define ADC_REF 3.3
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#define VOL_RADIO ADC_REF/ADC_12BIT //无电阻分压模式系数
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#define BAT_RADIO (ADC_REF*PRATIO)/ADC_12BIT //电阻分压模式系数
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//温度校正! ]+ M0 Q- H; v. i
#define TEMP130_CAL_ADDR ((uint16_t*) ((uint32_t) 0x1FF8007E))
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#define TEMP30_CAL_ADDR ((uint16_t*) ((uint32_t) 0x1FF8007A))% Q9 F6 ?; `7 p& b6 e" p* ?, H
#define VDD_CALIB ((uint16_t) (300))
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#define VDD_APPLI ((uint16_t) (330))
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/*******************************************************************************/ M% [/ a1 K# p& F6 Q8 [( K9 t& p5 @
* Function Name : ComputeTemperature$ F( b, v* i9 v% O: C
* Description : Compute STM32 Temperature
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* Input : None/ _0 M% m* F- \7 b
* Output : None( q N- V8 Z9 a6 g3 S! x. ?, z
* Return : None
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*******************************************************************************/6 @( d1 t" r9 Q/ v/ d0 |7 Q5 b
int32_t ComputeTemperature(uint32_t measure)
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{
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int32_t temperature;
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temperature = ((measure * VDD_APPLI / VDD_CALIB)- (int32_t) *TEMP30_CAL_ADDR );4 L7 V( q4 K5 i) @. ?" ~
temperature = temperature * (int32_t)(130 - 30);
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temperature = temperature / (int32_t)(*TEMP130_CAL_ADDR - *TEMP30_CAL_ADDR);
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temperature = temperature + 30;
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return(temperature);
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}
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/*******************************************************************************
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* Function Name : Get_Adc
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* Description : get voltage
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* Input : None
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* Output : None: m- E* i+ A. r" k
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*******************************************************************************/
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void Get_Adc(void): h G' `2 D$ U) V
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u32 adc_value;2 T' Z! d2 b( s; V% l
adc_value = 0;
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/*Start the conversion process*/
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if (HAL_ADC_Start(&hadc) != HAL_OK)# C, g6 z$ T+ @7 I
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/* Start Conversation Error */
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Error_Handler();
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HAL_ADC_PollForConversion(&hadc, 50);
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/* Check if the continous conversion of regular channel is finished */8 k) a. ]- `# l( R/ F! ~
if ((HAL_ADC_GetState(&hadc) & HAL_ADC_STATE_REG_EOC) == HAL_ADC_STATE_REG_EOC)8 i v2 X0 k" Y6 u9 h2 d5 ^+ O
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/*Get the converted value of regular channel */
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adc_value = HAL_ADC_GetValue(&hadc);1 `1 T- \( H0 J1 { p+ g
}
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printf("DEBUG: ADC CHANNEL 0 = %fV\r\n", BAT_RADIO*adc_value); //ADC 通道0 用10K,10K电阻分压 z- Y4 x0 h# _( z9 U" L
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/*Start the conversion process*/
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if (HAL_ADC_Start(&hadc) != HAL_OK)
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/* Start Conversation Error */
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Error_Handler();
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}
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HAL_ADC_PollForConversion(&hadc, 50); 9 \5 x5 Z, C5 W' C% {2 e
/* Check if the continous conversion of regular channel is finished */
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if ((HAL_ADC_GetState(&hadc) & HAL_ADC_STATE_REG_EOC) == HAL_ADC_STATE_REG_EOC)
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{
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/*Get the converted value of regular channel *// b( C. Y+ t9 m6 S3 _( D. o: b0 e
adc_value = HAL_ADC_GetValue(&hadc);
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}
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printf("DEBUG: ADC CHANNEL 1 = %fV\r\n", VOL_RADIO*adc_value); //ADC 通道1 没用电阻分压
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/*Start the conversion process*/ - `, x& M! d5 W( ` w* \
if (HAL_ADC_Start(&hadc) != HAL_OK), n+ d/ d: S, h K3 H+ Z
{
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/* Start Conversation Error */
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Error_Handler();
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}
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HAL_ADC_PollForConversion(&hadc, 50); # a5 k+ q4 W$ i* F( H, u
/* Check if the continous conversion of regular channel is finished */
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if ((HAL_ADC_GetState(&hadc) & HAL_ADC_STATE_REG_EOC) == HAL_ADC_STATE_REG_EOC)4 h9 U# ^# d$ c9 Y t
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/*Get the converted value of regular channel */
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adc_value = HAL_ADC_GetValue(&hadc);# K) U( X1 l/ I) R5 N* w% s2 g2 }
}
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printf("DEBUG: ADC CHANNEL 17 = %fV\r\n", VOL_RADIO*adc_value); //内部Vref = 1.2V" X6 ^% j7 {( Q
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/*Start the conversion process*/ 6 g+ c, x; {. u2 f+ X. k8 D
if (HAL_ADC_Start(&hadc) != HAL_OK)' X r; s+ c* D1 E2 u
{
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/* Start Conversation Error */8 w. k7 d! M6 j. b! D. l% t+ e' s
Error_Handler();
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HAL_ADC_PollForConversion(&hadc, 50);
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/* Check if the continous conversion of regular channel is finished */
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if ((HAL_ADC_GetState(&hadc) & HAL_ADC_STATE_REG_EOC) == HAL_ADC_STATE_REG_EOC)' F. ]0 I* e8 b$ T. l# P+ b+ D
{
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/*Get the converted value of regular channel */6 J' U! O+ ?* N6 \* j2 ~
adc_value = HAL_ADC_GetValue(&hadc);
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printf("DEBUG: ADC CHANNEL 18 = %d℃\r\n", ComputeTemperature(adc_value)); //内部温度传感器) l8 p d: ]6 T0 ?( u
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HAL_ADC_Stop(&hadc);
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}