void pwmout_init(pwmout_t* obj, PinName pin)
{
// Get the peripheral name from the pin and assign it to the object
obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
MBED_ASSERT(obj->pwm != (PWMName)NC);
// Get the pin function and assign the used channel to the object
uint32_t function = pinmap_function(pin, PinMap_PWM);
MBED_ASSERT(function != (uint32_t)NC);
obj->channel = STM_PIN_CHANNEL(function);
obj->inverted = STM_PIN_INVERTED(function);
// Enable TIM clock
if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
#if defined(TIM3_BASE)
if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
#endif
if (obj->pwm == PWM_21) __TIM21_CLK_ENABLE();
#if defined(TIM22_BASE)
if (obj->pwm == PWM_22) __TIM22_CLK_ENABLE();
#endif
// Configure GPIO
pinmap_pinout(pin, PinMap_PWM);
obj->pin = pin;
obj->period = 0;
obj->pulse = 0;
pwmout_period_us(obj, 20000); // 20 ms per default
}
void pwmout_init(pwmout_t* obj, PinName pin)
{
// Get the peripheral name from the pin and assign it to the object
obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
MBED_ASSERT(obj->pwm != (PWMName)NC);
// Get the functions (timer channel, (non)inverted) from the pin and assign it to the object
uint32_t function = pinmap_function(pin, PinMap_PWM);
MBED_ASSERT(function != (uint32_t)NC);
obj->channel = STM_PIN_CHANNEL(function);
obj->inverted = STM_PIN_INVERTED(function);
// Enable TIM clock
#if defined(TIM1_BASE)
if (obj->pwm == PWM_1) __HAL_RCC_TIM1_CLK_ENABLE();
#endif
#if defined(TIM2_BASE)
if (obj->pwm == PWM_2) __HAL_RCC_TIM2_CLK_ENABLE();
#endif
#if defined(TIM3_BASE)
if (obj->pwm == PWM_3) __HAL_RCC_TIM3_CLK_ENABLE();
#endif
#if defined(TIM4_BASE)
if (obj->pwm == PWM_4) __HAL_RCC_TIM4_CLK_ENABLE();
#endif
#if defined(TIM5_BASE)
if (obj->pwm == PWM_5) __HAL_RCC_TIM5_CLK_ENABLE();
#endif
#if defined(TIM8_BASE)
if (obj->pwm == PWM_8) __HAL_RCC_TIM8_CLK_ENABLE();
#endif
#if defined(TIM9_BASE)
if (obj->pwm == PWM_9) __HAL_RCC_TIM9_CLK_ENABLE();
#endif
#if defined(TIM10_BASE)
if (obj->pwm == PWM_10) __HAL_RCC_TIM10_CLK_ENABLE();
#endif
#if defined(TIM11_BASE)
if (obj->pwm == PWM_11) __HAL_RCC_TIM11_CLK_ENABLE();
#endif
#if defined(TIM12_BASE)
if (obj->pwm == PWM_12) __HAL_RCC_TIM12_CLK_ENABLE();
#endif
#if defined(TIM13_BASE)
if (obj->pwm == PWM_13) __HAL_RCC_TIM13_CLK_ENABLE();
#endif
#if defined(TIM14_BASE)
if (obj->pwm == PWM_14) __HAL_RCC_TIM14_CLK_ENABLE();
#endif
// Configure GPIO
pinmap_pinout(pin, PinMap_PWM);
obj->pin = pin;
obj->period = 0;
obj->pulse = 0;
obj->prescaler = 1;
pwmout_period_us(obj, 20000); // 20 ms per default
}
void pwmout_init(pwmout_t* obj, PinName pin)
{
// Get the peripheral name from the pin and assign it to the object
obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
MBED_ASSERT(obj->pwm != (PWMName)NC);
// Get the functions (timer channel, (non)inverted) from the pin and assign it to the object
uint32_t function = pinmap_function(pin, PinMap_PWM);
MBED_ASSERT(function != (uint32_t)NC);
obj->channel = STM_PIN_CHANNEL(function);
obj->inverted = STM_PIN_INVERTED(function);
// Enable TIM clock
if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
// Configure GPIO
pinmap_pinout(pin, PinMap_PWM);
obj->pin = pin;
obj->period = 0;
obj->pulse = 0;
obj->prescaler = 1;
pwmout_period_us(obj, 20000); // 20 ms per default
}
void analogin_init(analogin_t *obj, PinName pin)
{
uint32_t function = (uint32_t)NC;
// ADC Internal Channels "pins" (Temperature, Vref, Vbat, ...)
// are described in PinNames.h and PeripheralPins.c
// Pin value must be between 0xF0 and 0xFF
if ((pin < 0xF0) || (pin >= 0x100)) {
// Normal channels
// Get the peripheral name from the pin and assign it to the object
obj->handle.Instance = (ADC_TypeDef *)pinmap_peripheral(pin, PinMap_ADC);
// Get the functions (adc channel) from the pin and assign it to the object
function = pinmap_function(pin, PinMap_ADC);
// Configure GPIO
pinmap_pinout(pin, PinMap_ADC);
} else {
// Internal channels
obj->handle.Instance = (ADC_TypeDef *)pinmap_peripheral(pin, PinMap_ADC_Internal);
function = pinmap_function(pin, PinMap_ADC_Internal);
// No GPIO configuration for internal channels
}
MBED_ASSERT(obj->handle.Instance != (ADC_TypeDef *)NC);
MBED_ASSERT(function != (uint32_t)NC);
obj->channel = STM_PIN_CHANNEL(function);
// Save pin number for the read function
obj->pin = pin;
// Configure ADC object structures
obj->handle.State = HAL_ADC_STATE_RESET;
obj->handle.Init.OversamplingMode = DISABLE;
obj->handle.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV1;
obj->handle.Init.Resolution = ADC_RESOLUTION_12B;
obj->handle.Init.SamplingTime = ADC_SAMPLETIME_160CYCLES_5;
obj->handle.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD;
obj->handle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
obj->handle.Init.ContinuousConvMode = DISABLE;
obj->handle.Init.DiscontinuousConvMode = DISABLE;
obj->handle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIG_EDGE_NONE;
obj->handle.Init.ExternalTrigConv = ADC_EXTERNALTRIG0_T6_TRGO; // Not used here
obj->handle.Init.DMAContinuousRequests = DISABLE;
obj->handle.Init.EOCSelection = EOC_SINGLE_CONV;
obj->handle.Init.Overrun = OVR_DATA_OVERWRITTEN;
obj->handle.Init.LowPowerAutoWait = ENABLE;
obj->handle.Init.LowPowerFrequencyMode = DISABLE; // To be enabled only if ADC clock < 2.8 MHz
obj->handle.Init.LowPowerAutoPowerOff = DISABLE;
__HAL_RCC_ADC1_CLK_ENABLE();
if (HAL_ADC_Init(&obj->handle) != HAL_OK) {
error("Cannot initialize ADC");
}
if (!HAL_ADCEx_Calibration_GetValue(&obj->handle, ADC_SINGLE_ENDED)) {
HAL_ADCEx_Calibration_Start(&obj->handle, ADC_SINGLE_ENDED);
}
__HAL_ADC_ENABLE(&obj->handle);
}
void analogout_init(dac_t *obj, PinName pin)
{
DAC_ChannelConfTypeDef sConfig;
// Get the peripheral name from the pin and assign it to the object
obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
MBED_ASSERT(obj->dac != (DACName)NC);
// Get the pin function and assign the used channel to the object
uint32_t function = pinmap_function(pin, PinMap_DAC);
MBED_ASSERT(function != (uint32_t)NC);
obj->channel = STM_PIN_CHANNEL(function);
// Configure GPIO
pinmap_pinout(pin, PinMap_DAC);
// Save the pin for future use
obj->pin = pin;
// Enable DAC clock
if (obj->dac == DAC_1) {
__DAC1_CLK_ENABLE();
}
#if defined(DAC2)
if (obj->dac == DAC_2) {
__DAC2_CLK_ENABLE();
}
#endif
// Configure DAC
DacHandle.Instance = (DAC_TypeDef *)(obj->dac);
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
if (pin == PA_4) {
HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1);
pa4_used = 1;
}
#if defined(DAC_CHANNEL_2)
if (pin == PA_5) {
HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_2);
pa5_used = 1;
}
#endif
if (pin == PA_6) {
HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1);
}
analogout_write_u16(obj, 0);
}
void analogout_init(dac_t *obj, PinName pin)
{
uint32_t channel ;
HAL_StatusTypeDef status;
// Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
// Get the functions (dac channel) from the pin and assign it to the object
uint32_t function = pinmap_function(pin, PinMap_DAC);
MBED_ASSERT(function != (uint32_t)NC);
// Save the channel for the write and read functions
obj->channel = STM_PIN_CHANNEL(function);
if (obj->dac == (DACName)NC) {
error("DAC pin mapping failed");
}
// Configure GPIO
pinmap_pinout(pin, PinMap_DAC);
__GPIOA_CLK_ENABLE();
__DAC_CLK_ENABLE();
DacHandle.Instance = DAC;
status = HAL_DAC_Init(&DacHandle);
if (status != HAL_OK) {
error("HAL_DAC_Init failed");
}
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
if (obj->channel == 1) {
channel = DAC_CHANNEL_1;
} else {
channel = DAC_CHANNEL_2;
}
if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, channel) != HAL_OK) {
error("HAL_DAC_ConfigChannel failed");
}
if (HAL_DAC_Start(&DacHandle, channel) != HAL_OK) {
error("HAL_DAC_Start failed");
}
if (HAL_DAC_SetValue(&DacHandle, channel, DAC_ALIGN_12B_R, 0x000) != HAL_OK) {
error("HAL_DAC_SetValue failed");
}
}
void analogout_init(dac_t *obj, PinName pin) {
DAC_ChannelConfTypeDef sConfig = {0};
// Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
// Get the functions (dac channel) from the pin and assign it to the object
uint32_t function = pinmap_function(pin, PinMap_DAC);
MBED_ASSERT(function != (uint32_t)NC);
// Save the channel for the write and read functions
switch (STM_PIN_CHANNEL(function)) {
case 1:
obj->channel = DAC_CHANNEL_1;
break;
#if defined(DAC_CHANNEL_2)
case 2:
obj->channel = DAC_CHANNEL_2;
break;
#endif
default:
error("Unknown DAC channel");
break;
}
if (obj->dac == (DACName)NC) {
error("DAC pin mapping failed");
}
// Configure GPIO
pinmap_pinout(pin, PinMap_DAC);
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_DAC_CLK_ENABLE();
obj->handle.Instance = DAC;
obj->handle.State = HAL_DAC_STATE_RESET;
if (HAL_DAC_Init(&obj->handle) != HAL_OK ) {
error("HAL_DAC_Init failed");
}
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
if (HAL_DAC_ConfigChannel(&obj->handle, &sConfig, obj->channel) != HAL_OK) {
error("HAL_DAC_ConfigChannel failed");
}
analogout_write_u16(obj, 0);
}
void analogout_init(dac_t *obj, PinName pin)
{
DAC_ChannelConfTypeDef sConfig = {0};
// Get the peripheral name from the pin and assign it to the object
obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
MBED_ASSERT(obj->dac != (DACName)NC);
// Get the pin function and assign the used channel to the object
uint32_t function = pinmap_function(pin, PinMap_DAC);
MBED_ASSERT(function != (uint32_t)NC);
obj->channel = STM_PIN_CHANNEL(function);
// Configure GPIO
pinmap_pinout(pin, PinMap_DAC);
// Save the pin for future use
obj->pin = pin;
// Enable DAC clock
__HAL_RCC_DAC1_CLK_ENABLE();
// Configure DAC
DacHandle.Instance = DAC;
if (HAL_DAC_Init(&DacHandle) != HAL_OK) {
error("Cannot initialize DAC\n");
}
sConfig.DAC_SampleAndHold = DAC_SAMPLEANDHOLD_DISABLE;
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
sConfig.DAC_ConnectOnChipPeripheral = DAC_CHIPCONNECT_DISABLE;
sConfig.DAC_UserTrimming = DAC_TRIMMING_FACTORY;
if (obj->channel == 2) {
if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_2) != HAL_OK) {
error("Cannot configure DAC channel 2\n");
}
channel2_used = 1;
} else { // channel 1 per default
if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1) != HAL_OK) {
error("Cannot configure DAC channel 1\n");
}
obj->channel = 1;
channel1_used = 1;
}
analogout_write_u16(obj, 0);
}
static uint32_t get_pwm_channel(PinName pin)
{
uint32_t function = pinmap_function(pin, PinMap_PWM);
uint32_t channel = 0;
switch(STM_PIN_CHANNEL(function)) {
case 1:
channel = TIM_CHANNEL_1;
break;
case 2:
channel = TIM_CHANNEL_2;
break;
case 3:
channel = TIM_CHANNEL_3;
break;
case 4:
channel = TIM_CHANNEL_4;
break;
default:
channel = 0;
break;
}
return channel;
}
static uint32_t get_dac_channel(PinName pin)
{
uint32_t function = pinmap_function(pin, PinMap_DAC);
uint32_t channel = 0;
switch(STM_PIN_CHANNEL(function)) {
#ifdef DAC_CHANNEL_0
case 0:
channel = DAC_CHANNEL_0;
break;
#endif
case 1:
channel = DAC_CHANNEL_1;
break;
#ifdef DAC_CHANNEL_2
case 2:
channel = DAC_CHANNEL_2;
break;
#endif
default:
channel = 0;
break;
}
return channel;
}
void analogin_init(analogin_t *obj, PinName pin)
{
uint32_t function = (uint32_t)NC;
// ADC Internal Channels "pins" (Temperature, Vref, Vbat, ...)
// are described in PinNames.h and PeripheralPins.c
// Pin value must be between 0xF0 and 0xFF
if ((pin < 0xF0) || (pin >= 0x100)) {
// Normal channels
// Get the peripheral name from the pin and assign it to the object
obj->handle.Instance = (ADC_TypeDef *)pinmap_peripheral(pin, PinMap_ADC);
// Get the functions (adc channel) from the pin and assign it to the object
function = pinmap_function(pin, PinMap_ADC);
// Configure GPIO
pinmap_pinout(pin, PinMap_ADC);
} else {
// Internal channels
obj->handle.Instance = (ADC_TypeDef *)pinmap_peripheral(pin, PinMap_ADC_Internal);
function = pinmap_function(pin, PinMap_ADC_Internal);
// No GPIO configuration for internal channels
}
MBED_ASSERT(obj->handle.Instance != (ADC_TypeDef *)NC);
MBED_ASSERT(function != (uint32_t)NC);
obj->channel = STM_PIN_CHANNEL(function);
// Save pin number for the read function
obj->pin = pin;
// Configure ADC object structures
obj->handle.State = HAL_ADC_STATE_RESET;
obj->handle.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
obj->handle.Init.Resolution = ADC_RESOLUTION_12B;
obj->handle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
obj->handle.Init.ScanConvMode = DISABLE;
obj->handle.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
obj->handle.Init.LowPowerAutoWait = DISABLE;
obj->handle.Init.ContinuousConvMode = DISABLE;
obj->handle.Init.NbrOfConversion = 1;
obj->handle.Init.DiscontinuousConvMode = DISABLE;
obj->handle.Init.NbrOfDiscConversion = 0;
obj->handle.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
obj->handle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
obj->handle.Init.DMAContinuousRequests = DISABLE;
obj->handle.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
#if defined(ADC1)
if ((ADCName)obj->handle.Instance == ADC_1) {
__HAL_RCC_ADC1_CLK_ENABLE();
}
#endif
#if defined(ADC2)
if ((ADCName)obj->handle.Instance == ADC_2) {
__HAL_RCC_ADC2_CLK_ENABLE();
}
#endif
#if defined(ADC3)
if ((ADCName)obj->handle.Instance == ADC_3) {
__HAL_RCC_ADC34_CLK_ENABLE();
}
#endif
#if defined(ADC4)
if ((ADCName)obj->handle.Instance == ADC_4) {
__HAL_RCC_ADC34_CLK_ENABLE();
}
#endif
if (HAL_ADC_Init(&obj->handle) != HAL_OK) {
error("Cannot initialize ADC\n");
}
if (!HAL_ADCEx_Calibration_GetValue(&obj->handle, ADC_SINGLE_ENDED)) {
HAL_ADCEx_Calibration_Start(&obj->handle, ADC_SINGLE_ENDED);
}
}
void analogout_init(dac_t *obj, PinName pin)
{
DAC_ChannelConfTypeDef sConfig = {0};
// Get the peripheral name from the pin and assign it to the object
obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
MBED_ASSERT(obj->dac != (DACName)NC);
// Get the pin function and assign the used channel to the object
uint32_t function = pinmap_function(pin, PinMap_DAC);
MBED_ASSERT(function != (uint32_t)NC);
// Save the channel for the write and read functions
switch (STM_PIN_CHANNEL(function)) {
case 1:
obj->channel = DAC_CHANNEL_1;
break;
#if defined(DAC_CHANNEL_2)
case 2:
obj->channel = DAC_CHANNEL_2;
break;
#endif
default:
error("Unknown DAC channel");
break;
}
// Configure GPIO
pinmap_pinout(pin, PinMap_DAC);
// Save the pin for future use
obj->pin = pin;
// Enable DAC clock
if (obj->dac == DAC_1) {
__HAL_RCC_DAC1_CLK_ENABLE();
}
#if defined(DAC2)
if (obj->dac == DAC_2) {
__HAL_RCC_DAC2_CLK_ENABLE();
}
#endif
// Configure DAC
obj->handle.Instance = (DAC_TypeDef *)(obj->dac);
obj->handle.State = HAL_DAC_STATE_RESET;
if (HAL_DAC_Init(&obj->handle) != HAL_OK) {
error("HAL_DAC_Init failed");
}
/* Enable both Buffer and Switch in the configuration,
* letting HAL layer in charge of selecting either one
* or the other depending on the actual DAC instance and
* channel being configured.
*/
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
#if defined(DAC_OUTPUTSWITCH_ENABLE)
sConfig.DAC_OutputSwitch = DAC_OUTPUTSWITCH_ENABLE;
#endif
if (pin == PA_4) {
pa4_used = 1;
}
if (pin == PA_5) {
pa5_used = 1;
}
if (HAL_DAC_ConfigChannel(&obj->handle, &sConfig, obj->channel) != HAL_OK) {
error("HAL_DAC_ConfigChannel failed");
}
analogout_write_u16(obj, 0);
}
/** @addtogroup STM32F4xx_System_Private_FunctionPrototypes
* @{
*/
static uint32_t get_adc_channel(PinName pin)
{
uint32_t function = pinmap_function(pin, PinMap_ADC);
uint32_t channel = 0;
switch(STM_PIN_CHANNEL(function)) {
#ifdef ADC_CHANNEL_0
case 0:
channel = ADC_CHANNEL_0;
break;
#endif
case 1:
channel = ADC_CHANNEL_1;
break;
case 2:
channel = ADC_CHANNEL_2;
break;
case 3:
channel = ADC_CHANNEL_3;
break;
case 4:
channel = ADC_CHANNEL_4;
break;
case 5:
channel = ADC_CHANNEL_5;
break;
case 6:
channel = ADC_CHANNEL_6;
break;
case 7:
channel = ADC_CHANNEL_7;
break;
case 8:
channel = ADC_CHANNEL_8;
break;
case 9:
channel = ADC_CHANNEL_9;
break;
case 10:
channel = ADC_CHANNEL_10;
break;
case 11:
channel = ADC_CHANNEL_11;
break;
case 12:
channel = ADC_CHANNEL_12;
break;
case 13:
channel = ADC_CHANNEL_13;
break;
case 14:
channel = ADC_CHANNEL_14;
break;
case 15:
channel = ADC_CHANNEL_15;
break;
case 16:
channel = ADC_CHANNEL_TEMPSENSOR;
break;
case 17:
channel = ADC_CHANNEL_VREFINT;
break;
#ifdef ADC_CHANNEL_VBAT
case 18:
channel = ADC_CHANNEL_VBAT;
break;
#endif
default:
channel = 0;
break;
}
return channel;
}
void analogin_init(analogin_t *obj, PinName pin)
{
static bool adc_hsi_inited = false;
RCC_OscInitTypeDef RCC_OscInitStruct;
uint32_t function = (uint32_t)NC;
// ADC Internal Channels "pins" (Temperature, Vref, Vbat, ...)
// are described in PinNames.h and PeripheralPins.c
// Pin value must be between 0xF0 and 0xFF
if ((pin < 0xF0) || (pin >= 0x100)) {
// Normal channels
// Get the peripheral name from the pin and assign it to the object
obj->handle.Instance = (ADC_TypeDef *)pinmap_peripheral(pin, PinMap_ADC);
// Get the functions (adc channel) from the pin and assign it to the object
function = pinmap_function(pin, PinMap_ADC);
// Configure GPIO
pinmap_pinout(pin, PinMap_ADC);
} else {
// Internal channels
obj->handle.Instance = (ADC_TypeDef *)pinmap_peripheral(pin, PinMap_ADC_Internal);
function = pinmap_function(pin, PinMap_ADC_Internal);
// No GPIO configuration for internal channels
}
MBED_ASSERT(obj->handle.Instance != (ADC_TypeDef *)NC);
MBED_ASSERT(function != (uint32_t)NC);
obj->channel = STM_PIN_CHANNEL(function);
// Save pin number for the read function
obj->pin = pin;
// Configure ADC object structures
obj->handle.State = HAL_ADC_STATE_RESET;
obj->handle.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV4;
obj->handle.Init.Resolution = ADC_RESOLUTION_12B;
obj->handle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
obj->handle.Init.ScanConvMode = DISABLE; // Sequencer disabled (ADC conversion on only 1 channel: channel set on rank 1)
obj->handle.Init.EOCSelection = EOC_SINGLE_CONV; // On STM32L1xx ADC, overrun detection is enabled only if EOC selection is set to each conversion (or transfer by DMA enabled, this is not the case in this example).
obj->handle.Init.LowPowerAutoWait = ADC_AUTOWAIT_UNTIL_DATA_READ; // Enable the dynamic low power Auto Delay: new conversion start only when the previous conversion (for regular group) or previous sequence (for injected group) has been treated by user software.
obj->handle.Init.LowPowerAutoPowerOff = ADC_AUTOPOWEROFF_IDLE_PHASE; // Enable the auto-off mode: the ADC automatically powers-off after a conversion and automatically wakes-up when a new conversion is triggered (with startup time between trigger and start of sampling).
obj->handle.Init.ChannelsBank = ADC_CHANNELS_BANK_A;
obj->handle.Init.ContinuousConvMode = DISABLE; // Continuous mode disabled to have only 1 conversion at each conversion trig
obj->handle.Init.NbrOfConversion = 1; // Parameter discarded because sequencer is disabled
obj->handle.Init.DiscontinuousConvMode = DISABLE; // Parameter discarded because sequencer is disabled
obj->handle.Init.NbrOfDiscConversion = 1; // Parameter discarded because sequencer is disabled
obj->handle.Init.ExternalTrigConv = 0; // Not used
obj->handle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
obj->handle.Init.DMAContinuousRequests = DISABLE;
__HAL_RCC_ADC1_CLK_ENABLE();
if (HAL_ADC_Init(&obj->handle) != HAL_OK) {
error("Cannot initialize ADC");
}
// This section is done only once
if (!adc_hsi_inited) {
adc_hsi_inited = true;
// Enable the HSI (to clock the ADC)
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
}
}