2010-10-25 09:03:38 +00:00
|
|
|
/** @file /hal/micro/adc.h
|
|
|
|
* @brief Header for A/D converter.
|
|
|
|
*
|
|
|
|
* <!--(C) COPYRIGHT 2010 STMicroelectronics. All rights reserved. -->
|
|
|
|
*/
|
2013-08-10 12:31:43 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* @addtogroup stm32w-cpu
|
|
|
|
* @{ */
|
|
|
|
|
|
|
|
/** @defgroup adc
|
2010-10-25 09:03:38 +00:00
|
|
|
* Sample A/D converter driver.
|
|
|
|
*
|
|
|
|
* See adc.h for source code.
|
|
|
|
*
|
|
|
|
* @note Stm32w108xx ADC driver support is preliminary and essentailly untested -
|
|
|
|
* please do not attempt to use this ADC driver on this platform.
|
|
|
|
*
|
|
|
|
* @note Except for the Stm32w108xx, the StZNet stack does use these functions.
|
|
|
|
*
|
|
|
|
* To use the ADC system, include this file and ensure that
|
|
|
|
* ::halInternalInitAdc() is called whenever the microcontroller is
|
2011-03-21 12:11:52 +00:00
|
|
|
* started.
|
2010-10-25 09:03:38 +00:00
|
|
|
*
|
|
|
|
* A "user" is a separate thread of execution and usage. That is,
|
|
|
|
* internal St code is one user and clients are a different user.
|
|
|
|
* But a client that is calling the ADC in two different functions
|
|
|
|
* constitutes only one user, as long as the ADC access is not
|
|
|
|
* interleaved.
|
|
|
|
*
|
|
|
|
* @note This code does not allow access to the continuous reading mode of
|
|
|
|
* the ADC, which some clients may require.
|
|
|
|
*
|
|
|
|
* Many functions in this file return an ::StStatus value. See
|
|
|
|
* error-def.h for definitions of all ::StStatus return values.
|
|
|
|
*
|
|
|
|
*@{
|
|
|
|
*/
|
2013-11-24 15:57:08 +00:00
|
|
|
#ifndef ADC_H_
|
|
|
|
#define ADC_H_
|
2010-10-25 09:03:38 +00:00
|
|
|
|
2011-03-25 08:13:53 +00:00
|
|
|
#ifdef CORTEXM3_STM32W108
|
|
|
|
|
2010-10-25 09:03:38 +00:00
|
|
|
// A type for the ADC User enumeration.
|
2013-03-15 15:14:09 +00:00
|
|
|
typedef uint8_t ADCUser;
|
2010-10-25 09:03:38 +00:00
|
|
|
enum
|
|
|
|
{
|
|
|
|
/** LQI User ID. */
|
|
|
|
ADC_USER_LQI = 0,
|
|
|
|
/** Application User ID */
|
|
|
|
ADC_USER_APP = 1,
|
|
|
|
/** Application User ID */
|
|
|
|
ADC_USER_APP2 = 2
|
|
|
|
};
|
|
|
|
|
|
|
|
/** @brief Be sure to update ::NUM_ADC_USERS if additional users are added
|
|
|
|
* to the ::ADCUser list.
|
|
|
|
*/
|
|
|
|
#define NUM_ADC_USERS 3 // make sure to update if the above is adjusted
|
|
|
|
|
|
|
|
|
|
|
|
// A type for the reference enumeration.
|
2013-03-15 15:14:09 +00:00
|
|
|
typedef uint8_t ADCReferenceType;
|
2010-10-25 09:03:38 +00:00
|
|
|
enum
|
|
|
|
{
|
|
|
|
/** AREF pin reference. */
|
|
|
|
ADC_REF_AREF = 0x00,
|
|
|
|
/** AVCC pin reference. */
|
|
|
|
ADC_REF_AVCC = 0x40,
|
|
|
|
/** Internal reference. */
|
|
|
|
ADC_REF_INT = 0xC0
|
|
|
|
};
|
|
|
|
|
|
|
|
// A type for the rate enumeration.
|
2013-03-15 15:14:09 +00:00
|
|
|
typedef uint8_t ADCRateType;
|
2010-10-25 09:03:38 +00:00
|
|
|
enum
|
|
|
|
{
|
|
|
|
/** Rate 32 us, 5 effective bits in ADC_DATA[15:11] */
|
|
|
|
ADC_CONVERSION_TIME_US_32 = 0x0,
|
|
|
|
/** Rate 64 us, 6 effective bits in ADC_DATA[15:10] */
|
|
|
|
ADC_CONVERSION_TIME_US_64 = 0x1,
|
|
|
|
/** Rate 128 us, 7 effective bits in ADC_DATA[15:9] */
|
|
|
|
ADC_CONVERSION_TIME_US_128 = 0x2,
|
|
|
|
/** Rate 256 us, 8 effective bits in ADC_DATA[15:8] */
|
|
|
|
ADC_CONVERSION_TIME_US_256 = 0x3,
|
|
|
|
/** Rate 512 us, 9 effective bits in ADC_DATA[15:7] */
|
|
|
|
ADC_CONVERSION_TIME_US_512 = 0x4,
|
|
|
|
/** Rate 1024 us, 10 effective bits in ADC_DATA[15:6] */
|
|
|
|
ADC_CONVERSION_TIME_US_1024 = 0x5,
|
|
|
|
/** Rate 2048 us, 11 effective bits in ADC_DATA[15:5] */
|
|
|
|
ADC_CONVERSION_TIME_US_2048 = 0x6,
|
|
|
|
/** Rate 4096 us, 12 effective bits in ADC_DATA[15:4] */
|
|
|
|
ADC_CONVERSION_TIME_US_4096 = 0x7,
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
#if defined (CORTEXM3)
|
|
|
|
/** Channel 0 : ADC0 on PB5 */
|
|
|
|
#define ADC_MUX_ADC0 0x0
|
2011-04-20 10:14:11 +00:00
|
|
|
/** Channel 1 : ADC1 on PB6 */
|
2010-10-25 09:03:38 +00:00
|
|
|
#define ADC_MUX_ADC1 0x1
|
2011-04-20 10:14:11 +00:00
|
|
|
/** Channel 2 : ADC2 on PB7 */
|
2010-10-25 09:03:38 +00:00
|
|
|
#define ADC_MUX_ADC2 0x2
|
2011-04-20 10:14:11 +00:00
|
|
|
/** Channel 3 : ADC3 on PC1 */
|
2010-10-25 09:03:38 +00:00
|
|
|
#define ADC_MUX_ADC3 0x3
|
2011-04-20 10:14:11 +00:00
|
|
|
/** Channel 4 : ADC4 on PA4 */
|
2010-10-25 09:03:38 +00:00
|
|
|
#define ADC_MUX_ADC4 0x4
|
2011-04-20 10:14:11 +00:00
|
|
|
/** Channel 5 : ADC5 on PA5 */
|
2010-10-25 09:03:38 +00:00
|
|
|
#define ADC_MUX_ADC5 0x5
|
|
|
|
/** Channel 8 : VSS (0V) - not for high voltage range */
|
|
|
|
#define ADC_MUX_GND 0x8
|
|
|
|
/** Channel 9 : VREF/2 (0.6V) */
|
|
|
|
#define ADC_MUX_VREF2 0x9
|
|
|
|
/** Channel A : VREF (1.2V)*/
|
|
|
|
#define ADC_MUX_VREF 0xA
|
|
|
|
/** Channel B : Regulator/2 (0.9V) - not for high voltage range */
|
|
|
|
#define ADC_MUX_VREG2 0xB
|
|
|
|
|
|
|
|
// ADC_SOURCE_<pos>_<neg> selects <pos> as the positive input and <neg> as
|
|
|
|
// the negative input.
|
|
|
|
enum
|
|
|
|
{
|
|
|
|
ADC_SOURCE_ADC0_VREF2 = ((ADC_MUX_ADC0 <<ADC_MUXN_BITS) + ADC_MUX_VREF2),
|
|
|
|
ADC_SOURCE_ADC0_GND = ((ADC_MUX_ADC0 <<ADC_MUXN_BITS) + ADC_MUX_GND),
|
|
|
|
|
|
|
|
ADC_SOURCE_ADC1_VREF2 = ((ADC_MUX_ADC1 <<ADC_MUXN_BITS) + ADC_MUX_VREF2),
|
|
|
|
ADC_SOURCE_ADC1_GND = ((ADC_MUX_ADC1 <<ADC_MUXN_BITS) + ADC_MUX_GND),
|
|
|
|
|
|
|
|
ADC_SOURCE_ADC2_VREF2 = ((ADC_MUX_ADC2 <<ADC_MUXN_BITS) + ADC_MUX_VREF2),
|
|
|
|
ADC_SOURCE_ADC2_GND = ((ADC_MUX_ADC2 <<ADC_MUXN_BITS) + ADC_MUX_GND),
|
|
|
|
|
|
|
|
ADC_SOURCE_ADC3_VREF2 = ((ADC_MUX_ADC3 <<ADC_MUXN_BITS) + ADC_MUX_VREF2),
|
|
|
|
ADC_SOURCE_ADC3_GND = ((ADC_MUX_ADC3 <<ADC_MUXN_BITS) + ADC_MUX_GND),
|
|
|
|
|
2011-04-20 10:14:11 +00:00
|
|
|
ADC_SOURCE_ADC4_VREF2 = ((ADC_MUX_ADC4 <<ADC_MUXN_BITS) + ADC_MUX_VREF2),
|
|
|
|
ADC_SOURCE_ADC4_GND = ((ADC_MUX_ADC4 <<ADC_MUXN_BITS) + ADC_MUX_GND),
|
2010-10-25 09:03:38 +00:00
|
|
|
|
2011-04-20 10:14:11 +00:00
|
|
|
ADC_SOURCE_ADC5_VREF2 = ((ADC_MUX_ADC5 <<ADC_MUXN_BITS) + ADC_MUX_VREF2),
|
|
|
|
ADC_SOURCE_ADC5_GND = ((ADC_MUX_ADC5 <<ADC_MUXN_BITS) + ADC_MUX_GND),
|
2010-10-25 09:03:38 +00:00
|
|
|
|
|
|
|
ADC_SOURCE_ADC1_ADC0 = ((ADC_MUX_ADC1 <<ADC_MUXN_BITS) + ADC_MUX_ADC0),
|
|
|
|
ADC_SOURCE_ADC0_ADC1 = ((ADC_MUX_ADC1 <<ADC_MUXN_BITS) + ADC_MUX_ADC0),
|
|
|
|
|
|
|
|
ADC_SOURCE_ADC3_ADC2 = ((ADC_MUX_ADC3 <<ADC_MUXN_BITS) + ADC_MUX_ADC2),
|
|
|
|
ADC_SOURCE_ADC2_ADC3 = ((ADC_MUX_ADC3 <<ADC_MUXN_BITS) + ADC_MUX_ADC2),
|
|
|
|
|
|
|
|
ADC_SOURCE_ADC5_ADC4 = ((ADC_MUX_ADC5 <<ADC_MUXN_BITS) + ADC_MUX_ADC4),
|
|
|
|
|
|
|
|
ADC_SOURCE_GND_VREF2 = ((ADC_MUX_GND <<ADC_MUXN_BITS) + ADC_MUX_VREF2),
|
|
|
|
ADC_SOURCE_VGND = ((ADC_MUX_GND <<ADC_MUXN_BITS) + ADC_MUX_GND),
|
|
|
|
|
|
|
|
ADC_SOURCE_VREF_VREF2 = ((ADC_MUX_VREF <<ADC_MUXN_BITS) + ADC_MUX_VREF2),
|
|
|
|
ADC_SOURCE_VREF = ((ADC_MUX_VREF <<ADC_MUXN_BITS) + ADC_MUX_GND),
|
|
|
|
/* Modified the original ADC driver for enabling the ADC extended range mode required for
|
|
|
|
supporting the STLM20 temperature sensor.
|
|
|
|
NOTE:
|
|
|
|
The ADC extended range is inaccurate due to the high voltage mode bug of the general purpose ADC
|
|
|
|
(see STM32W108 errata). As consequence, it is not reccomended to use this ADC driver for getting
|
|
|
|
the temperature values
|
|
|
|
*/
|
|
|
|
#ifdef ENABLE_ADC_EXTENDED_RANGE_BROKEN
|
|
|
|
ADC_SOURCE_VREF2_VREF2 = ((ADC_MUX_VREF2 <<ADC_MUXN_BITS) + ADC_MUX_VREF2),
|
|
|
|
ADC_SOURCE_VREF2 = ((ADC_MUX_VREF2 <<ADC_MUXN_BITS) + ADC_MUX_GND),
|
|
|
|
#endif /* ENABLE_ADC_EXTENDED_RANGE_BROKEN */
|
|
|
|
|
|
|
|
ADC_SOURCE_VREG2_VREF2 = ((ADC_MUX_VREG2 <<ADC_MUXN_BITS) + ADC_MUX_VREF2),
|
|
|
|
ADC_SOURCE_VDD_GND = ((ADC_MUX_VREG2 <<ADC_MUXN_BITS) + ADC_MUX_GND)
|
|
|
|
};
|
2011-04-20 10:14:11 +00:00
|
|
|
|
|
|
|
/** @brief Macro that returns the ADCChannelType, from a given couple of sources
|
|
|
|
* (positive and negative). To be used with halStartAdcConversion().
|
|
|
|
*/
|
|
|
|
#define ADC_SOURCE(P,N) (( P << ADC_MUXN_BITS ) + N)
|
|
|
|
|
2010-10-25 09:03:38 +00:00
|
|
|
#endif // defined (CORTEXM3)
|
|
|
|
|
|
|
|
|
|
|
|
/** @brief A type for the channel enumeration
|
|
|
|
* (such as ::ADC_SOURCE_ADC0_GND)
|
|
|
|
*/
|
2013-03-15 15:14:09 +00:00
|
|
|
typedef uint8_t ADCChannelType;
|
2010-10-25 09:03:38 +00:00
|
|
|
|
2011-04-20 10:14:11 +00:00
|
|
|
/** @brief Returns the ADC channel from a given GPIO. Its value can can be used
|
|
|
|
* inside the ADC_SOURCE(P,N) macro to retrieve the input pair for
|
|
|
|
* halStartAdcConversion().
|
|
|
|
*
|
|
|
|
* @param io The GPIO pin (it can be specified with the convenience macros
|
|
|
|
* PORTA_PIN(), PORTB_PIN(), PORTC_PIN() )
|
|
|
|
*
|
|
|
|
* @return The ADC_MUX value connected to the given GPIO.
|
|
|
|
*/
|
2013-03-15 15:14:09 +00:00
|
|
|
uint8_t halGetADCChannelFromGPIO(uint32_t io);
|
2011-04-20 10:14:11 +00:00
|
|
|
|
2010-10-25 09:03:38 +00:00
|
|
|
|
|
|
|
/** @brief Initializes and powers-up the ADC.
|
|
|
|
*/
|
|
|
|
void halInternalInitAdc(void);
|
|
|
|
|
|
|
|
/** @brief Starts an ADC conversion for the user specified by \c id.
|
|
|
|
*
|
|
|
|
* @appusage The application must set \c reference to the voltage
|
|
|
|
* reference desired (see the ADC references enum),
|
|
|
|
* set \c channel to the channel number
|
|
|
|
* required (see the ADC channel enum), and set \c rate to reflect the
|
|
|
|
* number of bits of accuracy desired (see the ADC rates enum)
|
|
|
|
*
|
|
|
|
* @param id An ADC user.
|
|
|
|
*
|
|
|
|
* @param reference Voltage reference to use, chosen from enum
|
|
|
|
*
|
|
|
|
* @param channel Microprocessor channel number.
|
|
|
|
*
|
|
|
|
* @param rate rate number (see the ADC rate enum).
|
|
|
|
*
|
|
|
|
* @return One of the following:
|
|
|
|
* - ADC_CONVERSION_DEFERRED if the conversion is still waiting
|
|
|
|
* to start.
|
|
|
|
* - ADC_CONVERSION_BUSY if the conversion is currently taking
|
|
|
|
* place.
|
|
|
|
* - ST_ERR_FATAL if a passed parameter is invalid.
|
|
|
|
*/
|
|
|
|
StStatus halStartAdcConversion(ADCUser id,
|
|
|
|
ADCReferenceType reference,
|
|
|
|
ADCChannelType channel,
|
|
|
|
ADCRateType rate);
|
|
|
|
|
|
|
|
/** @brief Returns the status of a pending conversion
|
|
|
|
* previously started by ::halStartAdcConversion(). If the conversion
|
|
|
|
* is complete, writes the raw register value of the conversion (the unaltered
|
|
|
|
* value taken directly from the ADC's data register) into \c value.
|
|
|
|
*
|
|
|
|
* @param id An ADC user.
|
|
|
|
*
|
2013-03-15 15:14:09 +00:00
|
|
|
* @param value Pointer to an uint16_t to be loaded with the new value.
|
2010-10-25 09:03:38 +00:00
|
|
|
*
|
|
|
|
* @return One of the following:
|
|
|
|
* - ::ST_ADC_CONVERSION_DONE if the conversion is complete.
|
|
|
|
* - ::ST_ADC_CONVERSION_DEFERRED if the conversion is still waiting
|
|
|
|
* to start.
|
|
|
|
* - ::ST_ADC_CONVERSION_BUSY if the conversion is currently taking
|
|
|
|
* place.
|
|
|
|
* - ::ST_ADC_NO_CONVERSION_PENDING if \c id does not have a pending
|
|
|
|
* conversion.
|
|
|
|
*/
|
2013-03-15 15:14:09 +00:00
|
|
|
StStatus halRequestAdcData(ADCUser id, uint16_t *value);
|
2010-10-25 09:03:38 +00:00
|
|
|
|
|
|
|
|
|
|
|
/** @brief Waits for the user's request to complete and then,
|
|
|
|
* if a conversion was done, writes the raw register value of the conversion
|
|
|
|
* (the unaltered value taken directly from the ADC's data register) into
|
|
|
|
* \c value and returns ::ADC_CONVERSION_DONE, or immediately
|
|
|
|
* returns ::ADC_NO_CONVERSION_PENDING.
|
|
|
|
*
|
|
|
|
* @param id An ADC user.
|
|
|
|
*
|
2013-03-15 15:14:09 +00:00
|
|
|
* @param value Pointer to an uint16_t to be loaded with the new value.
|
2010-10-25 09:03:38 +00:00
|
|
|
*
|
|
|
|
* @return One of the following:
|
|
|
|
* - ::ST_ADC_CONVERSION_DONE if the conversion is complete.
|
|
|
|
* - ::ST_ADC_NO_CONVERSION_PENDING if \c id does not have a pending
|
|
|
|
* conversion.
|
|
|
|
*/
|
2013-03-15 15:14:09 +00:00
|
|
|
StStatus halReadAdcBlocking(ADCUser id, uint16_t *value);
|
2010-10-25 09:03:38 +00:00
|
|
|
|
|
|
|
|
|
|
|
/** @brief Calibrates or recalibrates the ADC system.
|
|
|
|
*
|
|
|
|
* @appusage Use this function to (re)calibrate as needed. This function is
|
|
|
|
* intended for the microcontroller, which requires proper calibration to calculate
|
|
|
|
* a human readible value (a value in volts). If the app does not call this
|
|
|
|
* function, the first time (and only the first time) the function
|
|
|
|
* ::halConvertValueToVolts() is called, this function is invoked. To
|
|
|
|
* maintain accurate volt calculations, the application should call this
|
|
|
|
* whenever it expects the temperature of the micro to change.
|
|
|
|
*
|
|
|
|
* @param id An ADC user.
|
|
|
|
*
|
|
|
|
* @return One of the following:
|
|
|
|
* - ::ST_ADC_CONVERSION_DONE if the calibration is complete.
|
|
|
|
* - ::ST_ERR_FATAL if the calibration failed.
|
|
|
|
*/
|
|
|
|
StStatus halAdcCalibrate(ADCUser id);
|
|
|
|
|
|
|
|
|
|
|
|
/** @brief Convert the raw register value (the unaltered value taken
|
|
|
|
* directly from the ADC's data register) into a signed fixed point value with
|
|
|
|
* units 10^-4 Volts. The returned value will be in the range -12000 to
|
|
|
|
* +12000 (-1.2000 volts to +1.2000 volts).
|
|
|
|
*
|
|
|
|
* @appusage Use this function to get a human useful value.
|
|
|
|
*
|
2013-03-15 15:14:09 +00:00
|
|
|
* @param value An uint16_t to be converted.
|
2010-10-25 09:03:38 +00:00
|
|
|
*
|
|
|
|
* @return Volts as signed fixed point with units 10^-4 Volts.
|
|
|
|
*/
|
2013-03-15 15:14:09 +00:00
|
|
|
int16_t halConvertValueToVolts(uint16_t value);
|
2010-10-25 09:03:38 +00:00
|
|
|
|
|
|
|
|
|
|
|
/** @brief Calibrates Vref to be 1.2V +/-10mV.
|
|
|
|
*
|
|
|
|
* @appusage This function must be called from halInternalInitAdc() before
|
|
|
|
* making ADC readings. This function is not intended to be called from any
|
|
|
|
* function other than halInternalInitAdc(). This function ensures that the
|
|
|
|
* master cell voltage and current bias values are calibrated before
|
|
|
|
* calibrating Vref.
|
|
|
|
*/
|
|
|
|
void stCalibrateVref(void);
|
|
|
|
|
|
|
|
#ifdef CORTEXM3
|
|
|
|
void halAdcSetClock(boolean fast);
|
|
|
|
void halAdcSetRange(boolean high);
|
|
|
|
boolean halAdcGetClock(void);
|
|
|
|
boolean halAdcGetRange(void);
|
|
|
|
#endif
|
|
|
|
|
2011-03-25 08:13:53 +00:00
|
|
|
#endif /* CORTEXM3_STM32W108 */
|
|
|
|
|
|
|
|
#ifdef CORTEXM3_STM32F103
|
|
|
|
#include "micro/cortexm3/stm32f103ret/adc.h"
|
|
|
|
#endif /* CORTEXM3_STM32F103 */
|
2011-04-20 10:14:11 +00:00
|
|
|
|
2013-11-24 15:57:08 +00:00
|
|
|
#endif // ADC_H_
|
2010-10-25 09:03:38 +00:00
|
|
|
|
|
|
|
/** @} // END addtogroup
|
|
|
|
*/
|
2013-08-10 12:31:43 +00:00
|
|
|
/** @} */
|
2010-10-25 09:03:38 +00:00
|
|
|
|