/** ****************************************************************************** * @file Examples_LL/ADC/ADC_MultiChannelSingleConversion/Src/main.c * @author MCD Application Team * @brief This example describes how to use a ADC peripheral to convert * several channels, ADC conversions are performed successively * in a scan sequence. * This example is based on the STM32F1xx ADC LL API; * Peripheral initialization done using LL unitary services functions. ****************************************************************************** * @attention * *

© Copyright (c) 2016 STMicroelectronics. * All rights reserved.

* * This software component is licensed by ST under BSD 3-Clause license, * the "License"; You may not use this file except in compliance with the * License. You may obtain a copy of the License at: * opensource.org/licenses/BSD-3-Clause * ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "main.h" /** @addtogroup STM32F1xx_LL_Examples * @{ */ /** @addtogroup ADC_MultiChannelSingleConversion * @{ */ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Definitions of ADC hardware constraints delays */ /* Note: Only ADC IP HW delays are defined in ADC LL driver driver, */ /* not timeout values: */ /* Timeout values for ADC operations are dependent to device clock */ /* configuration (system clock versus ADC clock), */ /* and therefore must be defined in user application. */ /* Refer to @ref ADC_LL_EC_HW_DELAYS for description of ADC timeout */ /* values definition. */ /* Timeout values for ADC operations. */ /* (enable settling time, disable settling time, ...) */ /* Values defined to be higher than worst cases: low clock frequency, */ /* maximum prescalers. */ /* Example of profile very low frequency : ADC clock frequency 12MHz */ /* prescaler 6, sampling time 1.5 ADC clock cycles, resolution 12 bits. */ /* - ADC enable time: maximum delay is 1 us */ /* (refer to device datasheet, parameter "tSTAB") */ /* - ADC disable time: maximum delay should be a few ADC clock cycles */ /* - ADC stop conversion time: maximum delay should be a few ADC clock */ /* cycles */ /* - ADC conversion time: with this hypothesis of clock settings, maximum */ /* delay will be 7us. */ /* (refer to device reference manual, section "Timing") */ /* Unit: ms */ #define ADC_CALIBRATION_TIMEOUT_MS ((uint32_t) 1) #define ADC_ENABLE_TIMEOUT_MS ((uint32_t) 1) #define ADC_DISABLE_TIMEOUT_MS ((uint32_t) 1) #define ADC_STOP_CONVERSION_TIMEOUT_MS ((uint32_t) 1) #define ADC_CONVERSION_TIMEOUT_MS ((uint32_t) 2) /* Delay between ADC enable and ADC end of calibration. */ /* Delay estimation in CPU cycles: Case of ADC calibration done */ /* immediately after ADC enable, ADC clock setting slow */ /* (LL_ADC_CLOCK_ASYNC_DIV32). Use a higher delay if ratio */ /* (CPU clock / ADC clock) is above 32. */ #define ADC_DELAY_ENABLE_CALIB_CPU_CYCLES (LL_ADC_DELAY_ENABLE_CALIB_ADC_CYCLES * 32) /* Definitions of environment analog values */ /* Value of analog reference voltage (Vref+), connected to analog voltage */ /* supply Vdda (unit: mV). */ #define VDDA_APPLI ((uint32_t)3300) /* Definitions of data related to this example */ /* Definition of ADCx conversions data table size */ /* Size of array set to ADC sequencer number of ranks converted, */ /* to have a rank in each array address. */ #define ADC_CONVERTED_DATA_BUFFER_SIZE ((uint32_t) 3) /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Variables for ADC conversion data */ __IO uint16_t aADCxConvertedData[ADC_CONVERTED_DATA_BUFFER_SIZE]; /* ADC group regular conversion data */ /* Variable to report status of DMA transfer of ADC group regular conversions */ /* 0: DMA transfer is not completed */ /* 1: DMA transfer is completed */ /* 2: DMA transfer has not been started yet (initial state) */ __IO uint8_t ubDmaTransferStatus = 2; /* Variable set into DMA interruption callback */ /* Variables for ADC conversion data computation to physical values */ __IO uint16_t uhADCxConvertedData_VoltageGPIO_mVolt = 0; /* Value of voltage on GPIO pin (on which is mapped ADC channel) calculated from ADC conversion data (unit: mV) */ __IO uint16_t uhADCxConvertedData_VrefInt_mVolt = 0; /* Value of internal voltage reference VrefInt calculated from ADC conversion data (unit: mV) */ __IO int16_t hADCxConvertedData_Temperature_DegreeCelsius = 0; /* Value of temperature calculated from ADC conversion data (unit: degree Celcius) */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); void Configure_DMA(void); void Configure_ADC(void); void Activate_ADC(void); void LED_Init(void); void LED_On(void); void LED_Off(void); void LED_Blinking(uint32_t Period); void UserButton_Init(void); /* Private functions ---------------------------------------------------------*/ /** * @brief Main program * @param None * @retval None */ int main(void) { /* Configure the system clock to 72 MHz */ SystemClock_Config(); /* Initialize LED2 */ LED_Init(); /* Initialize button in EXTI mode */ UserButton_Init(); /* Configure DMA for data transfer from ADC */ Configure_DMA(); /* Configure ADC */ /* Note: This function configures the ADC but does not enable it. */ /* To enable it, use function "Activate_ADC()". */ /* This is intended to optimize power consumption: */ /* 1. ADC configuration can be done once at the beginning */ /* (ADC disabled, minimal power consumption) */ /* 2. ADC enable (higher power consumption) can be done just before */ /* ADC conversions needed. */ /* Then, possible to perform successive "Activate_ADC()", */ /* "Deactivate_ADC()", ..., without having to set again */ /* ADC configuration. */ Configure_ADC(); /* Activate ADC */ /* Perform ADC activation procedure to make it ready to convert. */ Activate_ADC(); /* Infinite loop */ while (1) { /* Note: ADC group regular conversion start is done into push button */ /* IRQ handler, refer to function "UserButton_Callback()". */ /* Note: LED state depending on DMA transfer status is set into DMA */ /* IRQ handler, refer to function "DmaTransferComplete()". */ /* Note: ADC conversions data are stored into array "aADCxConvertedData" */ /* (for debug: see variable content into watch window). */ /* Each rank of the sequence is at an address of the array: */ /* - aADCxConvertedData[0]: ADC channel set on rank1 */ /* (ADC1 channel 4) */ /* - aADCxConvertedData[1]: ADC channel set on rank2 */ /* (ADC1 internal channel VrefInt) */ /* - aADCxConvertedData[2]: ADC channel set on rank3 */ /* (ADC1 internal channel temperature sensor)*/ /* Wait for ADC conversion and DMA transfer completion to process data */ while(ubDmaTransferStatus != 1) { } /* Computation of ADC conversions raw data to physical values */ /* using LL ADC driver helper macro. */ uhADCxConvertedData_VoltageGPIO_mVolt = __LL_ADC_CALC_DATA_TO_VOLTAGE(VDDA_APPLI, aADCxConvertedData[0], LL_ADC_RESOLUTION_12B); uhADCxConvertedData_VrefInt_mVolt = __LL_ADC_CALC_DATA_TO_VOLTAGE(VDDA_APPLI, aADCxConvertedData[1], LL_ADC_RESOLUTION_12B); hADCxConvertedData_Temperature_DegreeCelsius = __LL_ADC_CALC_TEMPERATURE_TYP_PARAMS(INTERNAL_TEMPSENSOR_AVGSLOPE, INTERNAL_TEMPSENSOR_V25, INTERNAL_TEMPSENSOR_V25_TEMP, VDDA_APPLI, aADCxConvertedData[2], LL_ADC_RESOLUTION_12B); /* Wait for a new ADC conversion and DMA transfer */ while(ubDmaTransferStatus != 0) { } } } /** * @brief This function configures DMA for transfer of data from ADC * @param None * @retval None */ void Configure_DMA(void) { /*## Configuration of NVIC #################################################*/ /* Configure NVIC to enable DMA interruptions */ NVIC_SetPriority(DMA1_Channel1_IRQn, 1); /* DMA IRQ lower priority than ADC IRQ */ NVIC_EnableIRQ(DMA1_Channel1_IRQn); /*## Configuration of DMA ##################################################*/ /* Enable the peripheral clock of DMA */ LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_DMA1); /* Configure the DMA transfer */ /* - DMA transfer in circular mode to match with ADC configuration: */ /* DMA unlimited requests. */ /* - DMA transfer from ADC without address increment. */ /* - DMA transfer to memory with address increment. */ /* - DMA transfer from ADC by half-word to match with ADC configuration: */ /* ADC resolution 12 bits. */ /* - DMA transfer to memory by half-word to match with ADC conversion data */ /* buffer variable type: half-word. */ LL_DMA_ConfigTransfer(DMA1, LL_DMA_CHANNEL_1, LL_DMA_DIRECTION_PERIPH_TO_MEMORY | LL_DMA_MODE_CIRCULAR | LL_DMA_PERIPH_NOINCREMENT | LL_DMA_MEMORY_INCREMENT | LL_DMA_PDATAALIGN_HALFWORD | LL_DMA_MDATAALIGN_HALFWORD | LL_DMA_PRIORITY_HIGH ); /* Set DMA transfer addresses of source and destination */ LL_DMA_ConfigAddresses(DMA1, LL_DMA_CHANNEL_1, LL_ADC_DMA_GetRegAddr(ADC1, LL_ADC_DMA_REG_REGULAR_DATA), (uint32_t)&aADCxConvertedData, LL_DMA_DIRECTION_PERIPH_TO_MEMORY); /* Set DMA transfer size */ LL_DMA_SetDataLength(DMA1, LL_DMA_CHANNEL_1, ADC_CONVERTED_DATA_BUFFER_SIZE); /* Enable DMA transfer interruption: transfer complete */ LL_DMA_EnableIT_TC(DMA1, LL_DMA_CHANNEL_1); /* Enable DMA transfer interruption: transfer error */ LL_DMA_EnableIT_TE(DMA1, LL_DMA_CHANNEL_1); /*## Activation of DMA #####################################################*/ /* Enable the DMA transfer */ LL_DMA_EnableChannel(DMA1, LL_DMA_CHANNEL_1); } /** * @brief Configure ADC (ADC instance: ADC1) and GPIO used by ADC channels. * @note In case re-use of this function outside of this example: * This function includes checks of ADC hardware constraints before * executing some configuration functions. * - In this example, all these checks are not necessary but are * implemented anyway to show the best practice usages * corresponding to reference manual procedure. * (On some STM32 series, setting of ADC features are not * conditioned to ADC state. However, in order to be compliant with * other STM32 series and to show the best practice usages, * ADC state is checked anyway with same constraints). * Software can be optimized by removing some of these checks, * if they are not relevant considering previous settings and actions * in user application. * - If ADC is not in the appropriate state to modify some parameters, * the setting of these parameters is bypassed without error * reporting: * it can be the expected behavior in case of recall of this * function to update only a few parameters (which update fullfills * the ADC state). * Otherwise, it is up to the user to set the appropriate error * reporting in user application. * @note Peripheral configuration is minimal configuration from reset values. * Thus, some useless LL unitary functions calls below are provided as * commented examples - setting is default configuration from reset. * @param None * @retval None */ void Configure_ADC(void) { __IO uint32_t wait_loop_index = 0; /*## Configuration of GPIO used by ADC channels ############################*/ /* Note: On this STM32 device, ADC1 channel 4 is mapped on GPIO pin PA.04 */ /* Enable GPIO Clock */ LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_GPIOA); /* Configure GPIO in analog mode to be used as ADC input */ LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_4, LL_GPIO_MODE_ANALOG); /*## Configuration of NVIC #################################################*/ /* Configure NVIC to enable ADC1 interruptions */ NVIC_SetPriority(ADC1_IRQn, 0); /* ADC IRQ greater priority than DMA IRQ */ NVIC_EnableIRQ(ADC1_IRQn); /*## Configuration of ADC ##################################################*/ /*## Configuration of ADC hierarchical scope: common to several ADC ########*/ /* Enable ADC clock (core clock) */ LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_ADC1); /* Note: Hardware constraint (refer to description of the functions */ /* below): */ /* On this STM32 serie, setting of these features are not */ /* conditioned to ADC state. */ /* However, in order to be compliant with other STM32 series */ /* and to show the best practice usages, ADC state is checked. */ /* Software can be optimized by removing some of these checks, if */ /* they are not relevant considering previous settings and actions */ /* in user application. */ if(__LL_ADC_IS_ENABLED_ALL_COMMON_INSTANCE() == 0) { /* Note: Call of the functions below are commented because they are */ /* useless in this example: */ /* setting corresponding to default configuration from reset state. */ /* Set ADC measurement path to internal channels */ LL_ADC_SetCommonPathInternalCh(__LL_ADC_COMMON_INSTANCE(ADC1), (LL_ADC_PATH_INTERNAL_VREFINT | LL_ADC_PATH_INTERNAL_TEMPSENSOR)); /* Delay for ADC temperature sensor stabilization time. */ /* Compute number of CPU cycles to wait for, from delay in us. */ /* Note: Variable divided by 2 to compensate partially */ /* CPU processing cycles (depends on compilation optimization). */ /* Note: If system core clock frequency is below 200kHz, wait time */ /* is only a few CPU processing cycles. */ /* Note: This delay is implemented here for the purpose in this example. */ /* It can be optimized if merged with other delays */ /* during ADC activation or if other actions are performed */ /* in the meantime. */ wait_loop_index = ((LL_ADC_DELAY_TEMPSENSOR_STAB_US * (SystemCoreClock / (100000 * 2))) / 10); while(wait_loop_index != 0) { wait_loop_index--; } /*## Configuration of ADC hierarchical scope: multimode ####################*/ /* Set ADC multimode configuration */ // LL_ADC_SetMultimode(__LL_ADC_COMMON_INSTANCE(ADC1), LL_ADC_MULTI_INDEPENDENT); /* Set ADC multimode DMA transfer */ // LL_ADC_SetMultiDMATransfer(__LL_ADC_COMMON_INSTANCE(ADC1), LL_ADC_MULTI_REG_DMA_EACH_ADC); /* Set ADC multimode: delay between 2 sampling phases */ // LL_ADC_SetMultiTwoSamplingDelay(__LL_ADC_COMMON_INSTANCE(ADC1), LL_ADC_MULTI_TWOSMP_DELAY_1CYCLE); } /*## Configuration of ADC hierarchical scope: ADC instance #################*/ /* Note: Hardware constraint (refer to description of the functions */ /* below): */ /* On this STM32 serie, setting of these features are not */ /* conditioned to ADC state. */ /* However, ADC state is checked anyway with standard requirements */ /* (refer to description of this function). */ if (LL_ADC_IsEnabled(ADC1) == 0) { /* Note: Call of the functions below are commented because they are */ /* useless in this example: */ /* setting corresponding to default configuration from reset state. */ /* Set ADC conversion data alignment */ // LL_ADC_SetResolution(ADC1, LL_ADC_DATA_ALIGN_RIGHT); /* Set Set ADC sequencers scan mode, for all ADC groups */ /* (group regular, group injected). */ LL_ADC_SetSequencersScanMode(ADC1, LL_ADC_SEQ_SCAN_ENABLE); } /*## Configuration of ADC hierarchical scope: ADC group regular ############*/ /* Note: Hardware constraint (refer to description of the functions */ /* below): */ /* On this STM32 serie, setting of these features are not */ /* conditioned to ADC state. */ /* However, ADC state is checked anyway with standard requirements */ /* (refer to description of this function). */ if (LL_ADC_IsEnabled(ADC1) == 0) { /* Set ADC group regular trigger source */ LL_ADC_REG_SetTriggerSource(ADC1, LL_ADC_REG_TRIG_SOFTWARE); /* Set ADC group regular trigger polarity */ // LL_ADC_REG_SetTriggerEdge(ADC1, LL_ADC_REG_TRIG_EXT_RISING); /* Set ADC group regular continuous mode */ LL_ADC_REG_SetContinuousMode(ADC1, LL_ADC_REG_CONV_SINGLE); /* Set ADC group regular conversion data transfer */ LL_ADC_REG_SetDMATransfer(ADC1, LL_ADC_REG_DMA_TRANSFER_UNLIMITED); /* Set ADC group regular sequencer */ /* Note: On this STM32 serie, ADC group regular sequencer is */ /* fully configurable: sequencer length and each rank */ /* affectation to a channel are configurable. */ /* Refer to description of function */ /* "LL_ADC_REG_SetSequencerLength()". */ /* Set ADC group regular sequencer length and scan direction */ LL_ADC_REG_SetSequencerLength(ADC1, LL_ADC_REG_SEQ_SCAN_ENABLE_3RANKS); /* Set ADC group regular sequencer discontinuous mode */ // LL_ADC_REG_SetSequencerDiscont(ADC1, LL_ADC_REG_SEQ_DISCONT_DISABLE); /* Set ADC group regular sequence: channel on the selected sequence rank. */ LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_1, LL_ADC_CHANNEL_4); LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_2, LL_ADC_CHANNEL_VREFINT); LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_3, LL_ADC_CHANNEL_TEMPSENSOR); } /*## Configuration of ADC hierarchical scope: ADC group injected ###########*/ /* Note: Hardware constraint (refer to description of the functions */ /* below): */ /* On this STM32 serie, setting of these features are not */ /* conditioned to ADC state. */ /* However, ADC state is checked anyway with standard requirements */ /* (refer to description of this function). */ if (LL_ADC_IsEnabled(ADC1) == 0) { /* Note: Call of the functions below are commented because they are */ /* useless in this example: */ /* setting corresponding to default configuration from reset state. */ /* Set ADC group injected trigger source */ // LL_ADC_INJ_SetTriggerSource(ADC1, LL_ADC_INJ_TRIG_SOFTWARE); /* Set ADC group injected trigger polarity */ // LL_ADC_INJ_SetTriggerEdge(ADC1, LL_ADC_INJ_TRIG_EXT_RISING); /* Set ADC group injected conversion trigger */ // LL_ADC_INJ_SetTrigAuto(ADC1, LL_ADC_INJ_TRIG_INDEPENDENT); /* Set ADC group injected sequencer */ /* Note: On this STM32 serie, ADC group injected sequencer is */ /* fully configurable: sequencer length and each rank */ /* affectation to a channel are configurable. */ /* Refer to description of function */ /* "LL_ADC_INJ_SetSequencerLength()". */ /* Set ADC group injected sequencer length and scan direction */ // LL_ADC_INJ_SetSequencerLength(ADC1, LL_ADC_INJ_SEQ_SCAN_DISABLE); /* Set ADC group injected sequencer discontinuous mode */ // LL_ADC_INJ_SetSequencerDiscont(ADC1, LL_ADC_INJ_SEQ_DISCONT_DISABLE); /* Set ADC group injected sequence: channel on the selected sequence rank. */ // LL_ADC_INJ_SetSequencerRanks(ADC1, LL_ADC_INJ_RANK_1, LL_ADC_CHANNEL_4); } /*## Configuration of ADC hierarchical scope: channels #####################*/ /* Note: Hardware constraint (refer to description of the functions */ /* below): */ /* On this STM32 serie, setting of these features are not */ /* conditioned to ADC state. */ /* However, in order to be compliant with other STM32 series */ /* and to show the best practice usages, ADC state is checked. */ /* Software can be optimized by removing some of these checks, if */ /* they are not relevant considering previous settings and actions */ /* in user application. */ if (LL_ADC_IsEnabled(ADC1) == 0) { /* Set ADC channels sampling time */ /* Note: Considering interruption occurring after each ADC group */ /* regular sequence conversions */ /* (IT from DMA transfer complete), */ /* select sampling time and ADC clock with sufficient */ /* duration to not create an overhead situation in IRQHandler. */ /* Note: Set long sampling time due to internal channels (VrefInt, */ /* temperature sensor) constraints. */ /* Refer to description of function */ /* "LL_ADC_SetChannelSamplingTime()". */ LL_ADC_SetChannelSamplingTime(ADC1, LL_ADC_CHANNEL_4, LL_ADC_SAMPLINGTIME_41CYCLES_5); LL_ADC_SetChannelSamplingTime(ADC1, LL_ADC_CHANNEL_VREFINT, LL_ADC_SAMPLINGTIME_239CYCLES_5); LL_ADC_SetChannelSamplingTime(ADC1, LL_ADC_CHANNEL_TEMPSENSOR, LL_ADC_SAMPLINGTIME_239CYCLES_5); } /*## Configuration of ADC transversal scope: analog watchdog ###############*/ /* Note: On this STM32 serie, there is only 1 analog watchdog available. */ /* Set ADC analog watchdog: channels to be monitored */ // LL_ADC_SetAnalogWDMonitChannels(ADC1, LL_ADC_AWD_DISABLE); /* Set ADC analog watchdog: thresholds */ // LL_ADC_SetAnalogWDThresholds(ADC1, LL_ADC_AWD_THRESHOLD_HIGH, __LL_ADC_DIGITAL_SCALE(LL_ADC_RESOLUTION_12B)); // LL_ADC_SetAnalogWDThresholds(ADC1, LL_ADC_AWD_THRESHOLD_LOW, 0x000); /*## Configuration of ADC transversal scope: oversampling ##################*/ /* Note: Feature not available on this STM32 serie */ /*## Configuration of ADC interruptions ####################################*/ /* Enable interruption ADC group regular end of sequence conversions */ LL_ADC_EnableIT_EOS(ADC1); /* Note: in this example, ADC group regular end of conversions */ /* (number of ADC conversions defined by DMA buffer size) */ /* are notified by DMA transfer interruptions). */ /* ADC interruptions of end of conversion are enabled optionally, */ /* as demonstration purpose in this example. */ } /** * @brief Perform ADC activation procedure to make it ready to convert * (ADC instance: ADC1). * @note Operations: * - ADC instance * - Run ADC self calibration * - Enable ADC * - ADC group regular * none: ADC conversion start-stop to be performed * after this function * - ADC group injected * none: ADC conversion start-stop to be performed * after this function * @param None * @retval None */ void Activate_ADC(void) { __IO uint32_t wait_loop_index = 0; #if (USE_TIMEOUT == 1) uint32_t Timeout = 0; /* Variable used for timeout management */ #endif /* USE_TIMEOUT */ /*## Operation on ADC hierarchical scope: ADC instance #####################*/ /* Note: Hardware constraint (refer to description of the functions */ /* below): */ /* On this STM32 serie, setting of these features are not */ /* conditioned to ADC state. */ /* However, in order to be compliant with other STM32 series */ /* and to show the best practice usages, ADC state is checked. */ /* Software can be optimized by removing some of these checks, if */ /* they are not relevant considering previous settings and actions */ /* in user application. */ if (LL_ADC_IsEnabled(ADC1) == 0) { /* Enable ADC */ LL_ADC_Enable(ADC1); /* Delay between ADC enable and ADC start of calibration. */ /* Note: Variable divided by 2 to compensate partially */ /* CPU processing cycles (depends on compilation optimization). */ wait_loop_index = (ADC_DELAY_ENABLE_CALIB_CPU_CYCLES >> 1); while(wait_loop_index != 0) { wait_loop_index--; } /* Run ADC self calibration */ LL_ADC_StartCalibration(ADC1); /* Poll for ADC effectively calibrated */ #if (USE_TIMEOUT == 1) Timeout = ADC_CALIBRATION_TIMEOUT_MS; #endif /* USE_TIMEOUT */ while (LL_ADC_IsCalibrationOnGoing(ADC1) != 0) { #if (USE_TIMEOUT == 1) /* Check Systick counter flag to decrement the time-out value */ if (LL_SYSTICK_IsActiveCounterFlag()) { if(Timeout-- == 0) { /* Time-out occurred. Set LED to blinking mode */ LED_Blinking(LED_BLINK_ERROR); } } #endif /* USE_TIMEOUT */ } } /*## Operation on ADC hierarchical scope: ADC group regular ################*/ /* Note: No operation on ADC group regular performed here. */ /* ADC group regular conversions to be performed after this function */ /* using function: */ /* "LL_ADC_REG_StartConversion();" */ /*## Operation on ADC hierarchical scope: ADC group injected ###############*/ /* Note: No operation on ADC group injected performed here. */ /* ADC group injected conversions to be performed after this function */ /* using function: */ /* "LL_ADC_INJ_StartConversion();" */ } /** * @brief Initialize LED2. * @param None * @retval None */ void LED_Init(void) { /* Enable the LED2 Clock */ LED2_GPIO_CLK_ENABLE(); /* Configure IO in output push-pull mode to drive external LED2 */ LL_GPIO_SetPinMode(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_MODE_OUTPUT); /* Reset value is LL_GPIO_OUTPUT_PUSHPULL */ //LL_GPIO_SetPinOutputType(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_OUTPUT_PUSHPULL); /* Reset value is LL_GPIO_SPEED_FREQ_LOW */ //LL_GPIO_SetPinSpeed(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_SPEED_FREQ_LOW); /* Reset value is LL_GPIO_PULL_DOWN */ //LL_GPIO_SetPinPull(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_PULL_DOWN); } /** * @brief Turn-on LED2. * @param None * @retval None */ void LED_On(void) { /* Turn LED2 on */ LL_GPIO_SetOutputPin(LED2_GPIO_PORT, LED2_PIN); } /** * @brief Turn-off LED2. * @param None * @retval None */ void LED_Off(void) { /* Turn LED2 off */ LL_GPIO_ResetOutputPin(LED2_GPIO_PORT, LED2_PIN); } /** * @brief Set LED2 to Blinking mode for an infinite loop (toggle period based on value provided as input parameter). * @param Period : Period of time (in ms) between each toggling of LED * This parameter can be user defined values. Pre-defined values used in that example are : * @arg LED_BLINK_FAST : Fast Blinking * @arg LED_BLINK_SLOW : Slow Blinking * @arg LED_BLINK_ERROR : Error specific Blinking * @retval None */ void LED_Blinking(uint32_t Period) { /* Turn LED2 on */ LL_GPIO_SetOutputPin(LED2_GPIO_PORT, LED2_PIN); /* Toggle IO in an infinite loop */ while (1) { LL_GPIO_TogglePin(LED2_GPIO_PORT, LED2_PIN); LL_mDelay(Period); } } /** * @brief Configures User push-button in EXTI Line Mode. * @param None * @retval None */ void UserButton_Init(void) { /* Enable the BUTTON Clock */ USER_BUTTON_GPIO_CLK_ENABLE(); /* Configure GPIO for BUTTON */ LL_GPIO_SetPinMode(USER_BUTTON_GPIO_PORT, USER_BUTTON_PIN, LL_GPIO_MODE_INPUT); LL_GPIO_SetPinPull(USER_BUTTON_GPIO_PORT, USER_BUTTON_PIN, LL_GPIO_PULL_DOWN); /* if(Button_Mode == BUTTON_MODE_EXTI) */ { /* Connect External Line to the GPIO */ USER_BUTTON_SYSCFG_SET_EXTI(); /* Enable a rising trigger EXTI line 13 Interrupt */ USER_BUTTON_EXTI_LINE_ENABLE(); USER_BUTTON_EXTI_FALLING_TRIG_ENABLE(); /* Configure NVIC for USER_BUTTON_EXTI_IRQn */ NVIC_EnableIRQ(USER_BUTTON_EXTI_IRQn); NVIC_SetPriority(USER_BUTTON_EXTI_IRQn,0x03); } } /** * @brief System Clock Configuration * The system Clock is configured as follow : * System Clock source = PLL (HSE) * SYSCLK(Hz) = 72000000 * HCLK(Hz) = 72000000 * AHB Prescaler = 1 * APB1 Prescaler = 2 * APB2 Prescaler = 1 * HSE Frequency(Hz) = 8000000 * PLLMUL = 9 * Flash Latency(WS) = 2 * @param None * @retval None */ void SystemClock_Config(void) { /* Set FLASH latency */ LL_FLASH_SetLatency(LL_FLASH_LATENCY_2); /* Enable HSE oscillator */ LL_RCC_HSE_EnableBypass(); LL_RCC_HSE_Enable(); while(LL_RCC_HSE_IsReady() != 1) { }; /* Main PLL configuration and activation */ LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSE_DIV_1, LL_RCC_PLL_MUL_9); LL_RCC_PLL_Enable(); while(LL_RCC_PLL_IsReady() != 1) { }; /* Sysclk activation on the main PLL */ LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1); LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL); while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL) { }; /* Set APB1 & APB2 prescaler*/ LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_2); LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1); /* Set systick to 1ms in using frequency set to 72MHz */ LL_Init1msTick(72000000); /* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */ LL_SetSystemCoreClock(72000000); } /******************************************************************************/ /* USER IRQ HANDLER TREATMENT */ /******************************************************************************/ /** * @brief Function to manage IRQ Handler * @param None * @retval None */ void UserButton_Callback(void) { /* Turn LED off before performing a new ADC conversion start */ /* (conversion of ranks set in ADC group regular sequencer). */ LED_Off(); /* Reset status variable of DMA transfer before performing a new ADC */ /* conversion start of a sequence (in case of previous DMA transfer */ /* completed). */ /* Note: Optionally, for this example purpose, check DMA transfer */ /* status before starting another ADC conversion. */ if (ubDmaTransferStatus != 0) { ubDmaTransferStatus = 0; } else { /* Error: Previous action (ADC conversion or DMA transfer) not yet */ /* completed. */ LED_Blinking(LED_BLINK_ERROR); } /* Start ADC group regular conversion */ /* Note: Hardware constraint (refer to description of the functions */ /* below): */ /* On this STM32 serie, setting of these features are not */ /* conditioned to ADC state. */ /* However, in order to be compliant with other STM32 series */ /* and to show the best practice usages, ADC state is checked. */ /* Software can be optimized by removing some of these checks, if */ /* they are not relevant considering previous settings and actions */ /* in user application. */ if (LL_ADC_IsEnabled(ADC1) == 1) { LL_ADC_REG_StartConversionSWStart(ADC1); } else { /* Error: ADC conversion start could not be performed */ LED_Blinking(LED_BLINK_ERROR); } } /** * @brief DMA transfer complete callback * @note This function is executed when the transfer complete interrupt * is generated * @retval None */ void AdcDmaTransferComplete_Callback() { /* Update status variable of DMA transfer */ ubDmaTransferStatus = 1; /* Set LED depending on DMA transfer status */ /* - Turn-on if DMA transfer is completed */ /* - Turn-off if DMA transfer is not completed */ LED_On(); } /** * @brief DMA transfer error callback * @note This function is executed when the transfer error interrupt * is generated during DMA transfer * @retval None */ void AdcDmaTransferError_Callback() { /* Error detected during DMA transfer */ LED_Blinking(LED_BLINK_ERROR); } #ifdef USE_FULL_ASSERT /** * @brief Reports the name of the source file and the source line number * where the assert_param error has occurred. * @param file: pointer to the source file name * @param line: assert_param error line source number * @retval None */ void assert_failed(uint8_t *file, uint32_t line) { /* User can add his own implementation to report the file name and line number, ex: printf("Wrong parameters value: file %s on line %d", file, line) */ /* Infinite loop */ while (1) { } } #endif /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/