Skip to content

[NUCLEO_F303RE] Correct ADC initialization #842

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Jan 14, 2015
Merged

[NUCLEO_F303RE] Correct ADC initialization #842

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
87 changes: 47 additions & 40 deletions libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F303RE/analogin_api.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -37,13 +37,13 @@

ADC_HandleTypeDef AdcHandle;

int adc1_inited = 0;
int adc2_inited = 0;
int adc3_inited = 0;
int adc4_inited = 0;

void analogin_init(analogin_t *obj, PinName pin)
{
static int adc1_inited = 0;
static int adc2_inited = 0;
static int adc3_inited = 0;
static int adc4_inited = 0;

// Get the peripheral name from the pin and assign it to the object
obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
MBED_ASSERT(obj->adc != (ADCName)NC);
Expand All @@ -54,42 +54,49 @@ void analogin_init(analogin_t *obj, PinName pin)
// Save pin number for the read function
obj->pin = pin;

// The ADC initialization is done only once for each ADC
if ((adc1_inited == 0) || (adc2_inited == 0) || (adc3_inited == 0) || (adc4_inited == 0)) {
if (obj->adc == ADC_1) {
__ADC12_CLK_ENABLE();
adc1_inited = 1;
}
if (obj->adc == ADC_2) {
__ADC12_CLK_ENABLE();
adc2_inited = 1;
}
if (obj->adc == ADC_3) {
__ADC34_CLK_ENABLE();
adc3_inited = 1;
}
if (obj->adc == ADC_4) {
__ADC34_CLK_ENABLE();
adc4_inited = 1;
}
// Configure ADC
AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2;
AdcHandle.Init.Resolution = ADC_RESOLUTION12b;
AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
AdcHandle.Init.ScanConvMode = DISABLE;
AdcHandle.Init.EOCSelection = DISABLE;
AdcHandle.Init.LowPowerAutoWait = DISABLE;
AdcHandle.Init.ContinuousConvMode = DISABLE;
AdcHandle.Init.NbrOfConversion = 1;
AdcHandle.Init.DiscontinuousConvMode = DISABLE;
AdcHandle.Init.NbrOfDiscConversion = 0;
AdcHandle.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
AdcHandle.Init.DMAContinuousRequests = DISABLE;
AdcHandle.Init.Overrun = OVR_DATA_OVERWRITTEN;
HAL_ADC_Init(&AdcHandle);
// Check if ADC is already initialized
if ((obj->adc == ADC_1) && adc1_inited) return;
if ((obj->adc == ADC_2) && adc2_inited) return;
if ((obj->adc == ADC_3) && adc3_inited) return;
if ((obj->adc == ADC_4) && adc4_inited) return;

if (obj->adc == ADC_1) {
__ADC12_CLK_ENABLE();
adc1_inited = 1;
}

if (obj->adc == ADC_2) {
__ADC12_CLK_ENABLE();
adc2_inited = 1;
}

if (obj->adc == ADC_3) {
__ADC34_CLK_ENABLE();
adc3_inited = 1;
}

if (obj->adc == ADC_4) {
__ADC34_CLK_ENABLE();
adc4_inited = 1;
}

// Configure ADC
AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2;
AdcHandle.Init.Resolution = ADC_RESOLUTION12b;
AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
AdcHandle.Init.ScanConvMode = DISABLE;
AdcHandle.Init.EOCSelection = DISABLE;
AdcHandle.Init.LowPowerAutoWait = DISABLE;
AdcHandle.Init.ContinuousConvMode = DISABLE;
AdcHandle.Init.NbrOfConversion = 1;
AdcHandle.Init.DiscontinuousConvMode = DISABLE;
AdcHandle.Init.NbrOfDiscConversion = 0;
AdcHandle.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
AdcHandle.Init.DMAContinuousRequests = DISABLE;
AdcHandle.Init.Overrun = OVR_DATA_OVERWRITTEN;
HAL_ADC_Init(&AdcHandle);
}

static inline uint16_t adc_read(analogin_t *obj)
Expand Down