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LibrePilot/flight/pios/inc/pios_adc.h
Alessio Morale a9f1d55fea OP-1227 Fix high CPU usage: Optimize Memory usage in ADC driver.
- performs undersampling in two steps operating with a half buffer at time;
- Skip costly undersampling for Temperature channel;
- some optimizations to the downsample loops;
- apply compiler speed optimization to PIOS_ADC_downsample_data()
2014-06-08 22:01:05 +02:00

57 lines
1.9 KiB
C

/**
******************************************************************************
* @addtogroup PIOS PIOS Core hardware abstraction layer
* @{
* @addtogroup PIOS_ADC ADC Functions
* @brief STM32 ADC PIOS interface
* @{
*
* @file pios_adc.h
* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2012.
* @brief ADC functions header.
* @see The GNU Public License (GPL) Version 3
*
*****************************************************************************/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef PIOS_ADC_H
#define PIOS_ADC_H
// Maximum of 50 oversampled points
#define PIOS_ADC_MAX_SAMPLES ((((PIOS_ADC_NUM_CHANNELS + PIOS_ADC_USE_ADC2) >> PIOS_ADC_USE_ADC2) << PIOS_ADC_USE_ADC2) * PIOS_ADC_MAX_OVERSAMPLING * 2 / 2)
typedef void (*ADCCallback)(float *data);
/* Public Functions */
void PIOS_ADC_Config(uint32_t oversampling);
int32_t PIOS_ADC_PinGet(uint32_t pin);
float PIOS_ADC_PinGetVolt(uint32_t pin);
int16_t *PIOS_ADC_GetRawBuffer(void);
uint8_t PIOS_ADC_GetOverSampling(void);
void PIOS_ADC_SetCallback(ADCCallback new_function);
#if defined(PIOS_INCLUDE_FREERTOS)
void PIOS_ADC_SetQueue(xQueueHandle data_queue);
#endif
extern void PIOS_ADC_DMA_Handler(void);
#endif /* PIOS_ADC_H */
/**
* @}
* @}
*/