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Merged in raiden00/nuttx (pull request #338)

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OPAMP support for STM32F33XX
This commit is contained in:
Mateusz Szafoni 2017-05-02 13:57:56 +00:00 committed by Gregory Nutt
commit 1feaae7222
14 changed files with 2164 additions and 7 deletions
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4
arch/arm/src/stm32/Make.defs
View File

@ -221,6 +221,10 @@ ifeq ($(CONFIG_COMP),y)
CHIP_CSRCS += stm32_comp.c
endif
ifeq ($(CONFIG_OPAMP),y)
CHIP_CSRCS += stm32_opamp.c
endif
ifeq ($(CONFIG_STM32_1WIREDRIVER),y)
CHIP_CSRCS += stm32_1wire.c
endif

6
arch/arm/src/stm32/chip/stm32f33xxx_opamp.h
View File

@ -54,7 +54,7 @@
/* Register Addresses *******************************************************************************/
#define STM32_OPAMP2_CSR (STM32_OPAMP2_BASE+STM32_OPAMP2_CSR_OFFSET)
#define STM32_OPAMP2_CSR (STM32_OPAMP_BASE+STM32_OPAMP2_CSR_OFFSET)
/* Register Bitfield Definitions ****************************************************/
@ -66,7 +66,7 @@
#define OPAMP_CSR_VPSEL_SHIFT (3) /* Bits 2-3: OPAMP non inverting input selection */
#define OPAMP_CSR_VPSEL_MASK (3 << OPAMP_CSR_VPSEL_SHIFT)
/* 00: Reserved */
# define OPAMP_CSR_VPSEL_PB13 (1 << OPAMP_CSR_VPSEL_SHIFT) /* 01: PB14 */
# define OPAMP_CSR_VPSEL_PB14 (1 << OPAMP_CSR_VPSEL_SHIFT) /* 01: PB14 */
# define OPAMP_CSR_VPSEL_PB0 (2 << OPAMP_CSR_VPSEL_SHIFT) /* 10: PB0 */
# define OPAMP_CSR_VPSEL_PA7 (3 << OPAMP_CSR_VPSEL_SHIFT) /* 11: PA7 */
/* Bit 4: Reserved */
@ -74,7 +74,7 @@
#define OPAMP_CSR_VMSEL_MASK (3 << OPAMP_CSR_VMSEL_SHIFT)
# define OPAMP_CSR_VMSEL_PC5 (0 << OPAMP_CSR_VMSEL_SHIFT) /* 00: PC5 */
# define OPAMP_CSR_VMSEL_PA5 (1 << OPAMP_CSR_VMSEL_SHIFT) /* 01: PA5 */
# define OPAMP_CSR_VMSEL_RESISTOR (2 << OPAMP_CSR_VMSEL_SHIFT) /* 10: Resistor feedback output */
# define OPAMP_CSR_VMSEL_PGA (2 << OPAMP_CSR_VMSEL_SHIFT) /* 10: Resistor feedback output (PGA mode)*/
# define OPAMP_CSR_VMSEL_FOLLOWER (3 << OPAMP_CSR_VMSEL_SHIFT) /* 11: Follower mode */
#define OPAMP_CSR_TCMEN (1 << 7) /* Bit 7: Timer controlled Mux mode enable */
#define OPAMP_CSR_VMSSEL (1 << 8) /* Bit 8: OPAMP inverting input secondary selection */

7
arch/arm/src/stm32/chip/stm32f33xxx_pinmap.h
View File

@ -337,9 +337,10 @@
#define GPIO_OPAMP2_VINM_1 (GPIO_ANALOG|GPIO_PORTA|GPIO_PIN5)
#define GPIO_OPAMP2_VINM_2 (GPIO_ANALOG|GPIO_PORTC|GPIO_PIN5)
#define GPIO_OPAMP2_VOUT (GPIO_ANALOG|GPIO_PORTA|GPIO_PIN6)
#define GPIO_OPAMP2_VINP_1 (GPIO_ANALOG|GPIO_PORTA|GPIO_PIN7)
#define GPIO_OPAMP2_VINP_2 (GPIO_ANALOG|GPIO_PORTB|GPIO_PIN0)
#define GPIO_OPAMP2_VINP_3 (GPIO_ANALOG|GPIO_PORTB|GPIO_PIN14)
#undef GPIO_OPAMP2_VINP_1 /* not supported in F33XX */
#define GPIO_OPAMP2_VINP_2 (GPIO_ANALOG|GPIO_PORTA|GPIO_PIN7)
#define GPIO_OPAMP2_VINP_3 (GPIO_ANALOG|GPIO_PORTB|GPIO_PIN0)
#define GPIO_OPAMP2_VINP_4 (GPIO_ANALOG|GPIO_PORTB|GPIO_PIN14)
/* TSC */

1
arch/arm/src/stm32/stm32.h
View File

@ -69,6 +69,7 @@
#include "stm32_gpio.h"
#include "stm32_i2c.h"
#include "stm32_ltdc.h"
#include "stm32_opamp.h"
#include "stm32_pwr.h"
#include "stm32_rcc.h"
#include "stm32_rtc.h"

1418
arch/arm/src/stm32/stm32_opamp.c Normal file
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File diff suppressed because it is too large Load Diff

231
arch/arm/src/stm32/stm32_opamp.h Normal file
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@ -0,0 +1,231 @@
/************************************************************************************
* arch/arm/src/stm32/stm32_opamp.h
*
* Copyright (C) 2017 Gregory Nutt. All rights reserved.
* Author: Mateusz Szafoni <raiden00@railab.me>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
#ifndef __ARCH_ARM_SRC_STM32_STM32_OPAMP_H
#define __ARCH_ARM_SRC_STM32_STM32_OPAMP_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include "chip.h"
#ifdef CONFIG_STM32_OPAMP
#if defined(CONFIG_STM32_STM32F30XX)
# error "OPAMP support for STM32F30XX not implemented yet"
#elif defined(CONFIG_STM32_STM32F33XX)
# include "chip/stm32f33xxx_opamp.h"
#endif
#include <nuttx/analog/opamp.h>
/************************************************************************************
* Pre-processor definitions
************************************************************************************/
/* OPAMP operation mode */
#define OPAMP_MODE_STANDALONE 0
#define OPAMP_MODE_FOLLOWER 1
#define OPAMP_MODE_PGA 2
/* Timer controlled Mux mode */
#define OPAMP_MUX_DISABLE 0
#define OPAMP_MUX_ENABLE 1
/* User callibration */
#define OPAMP_USERCAL_DISABLE 0
#define OPAMP_USERCAL_ENABLE 1
/* Default configuration */
#define OPAMP_MODE_DEFAULT OPAMP_MODE_STANDALONE /* Standalone mode */
#define OPAMP_MUX_DEFAULT OPAMP_MUX_DISABLE /* MUX disabled */
#define OPAMP_USERCAL_DEFAULT OPAMP_USERCAL_DISABLE /* User calibration disabled */
#define OPAMP_GAIN_DEFAULT OPAMP_GAIN_2 /* Gain in PGA mode = 2 */
#define OPAMP_LOCK_DEFAULT OPAMP_LOCK_RW /* Do not lock CSR register */
/************************************************************************************
* Public Types
************************************************************************************/
/* CSR register lock state */
enum stm32_opamp_lock_e
{
OPAMP_LOCK_RW,
OPAMP_LOCK_RO
};
/* Gain in PGA mode */
enum stm32_opamp_gain_e
{
OPAMP_GAIN_2,
OPAMP_GAIN_4,
OPAMP_GAIN_8,
OPAMP_GAIN_2_VM0,
OPAMP_GAIN_4_VM0,
OPAMP_GAIN_8_VM0,
OPAMP_GAIN_16_VM0,
OPAMP_GAIN_2_VM1,
OPAMP_GAIN_4_VM1,
OPAMP_GAIN_8_VM1,
OPAMP_GAIN_16_VM1
};
/* Input selection and secondary input selection use the same GPIOs */
#ifdef CONFIG_STM32_OPAMP1
enum stm32_opamp1_vpsel_e
{
OPAMP1_VPSEL_PA7,
OPAMP1_VPSEL_PA5,
OPAMP1_VPSEL_PA3,
OPAMP1_VPSEL_PA1
};
enum stm32_opamp1_vmsel_e
{
OPAMP1_VMSEL_PC5,
OPAMP1_VMSEL_PA3,
OPAMP1_VMSEL_PGAMODE,
OPAMP1_VMSEL_FOLLOWER,
};
#endif
#ifdef CONFIG_STM32_OPAMP2
enum stm32_opamp2_vpsel_e
{
#ifndef CONFIG_STM32_STM32F33XX
/* TODO: STM32F303xB/C and STM32F358C devices only */
OPAMP2_VPSEL_PD14,
#endif
OPAMP2_VPSEL_PB14,
OPAMP2_VPSEL_PB0,
OPAMP2_VPSEL_PA7
};
enum stm32_opamp2_vmsel_e
{
OPAMP2_VMSEL_PC5,
OPAMP2_VMSEL_PA5,
OPAMP2_VMSEL_PGAMODE,
OPAMP2_VMSEL_FOLLOWER
};
#endif
#ifdef CONFIG_STM32_OPAMP3
enum stm32_opamp3_vpsel_e
{
OPAMP3_VPSEL_PB13,
OPAMP3_VPSEL_PA5,
OPAMP3_VPSEL_PA1,
OPAMP3_VPSEL_PB0
};
enum stm32_opamp3_vmsel_e
{
OPAMP3_VMSEL_PB10,
OPAMP3_VMSEL_PB2,
OPAMP3_VMSEL_PGAMODE,
OPAMP3_VMSEL_FOLLOWER
};
#endif
#ifdef CONFIG_STM32_OPAMP4
enum stm32_opamp4_vpsel_e
{
OPAMP4_VPSEL_PD11,
OPAMP4_VPSEL_PB11,
OPAMP4_VPSEL_PA4,
OPAMP4_VPSEL_PB13
};
enum stm32_opamp4_vmsel_e
{
OPAMP4_VMSEL_PB10,
OPAMP4_VMSEL_PD8,
OPAMP4_VMSEL_PGAMODE,
OPAMP4_VMSEL_FOLLOWER
};
#endif
/************************************************************************************
* Public Function Prototypes
************************************************************************************/
#ifndef __ASSEMBLY__
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Name: stm32_opampinitialize
*
* Description:
* Initialize the OPAMP.
*
* Input Parameters:
* intf - The OPAMP interface number.
*
* Returned Value:
* Valid OPAMP device structure reference on succcess; a NULL on failure.
*
* Assumptions:
* 1. Clock to the OPAMP block has enabled,
* 2. Board-specific logic has already configured
*
****************************************************************************/
FAR struct opamp_dev_s* stm32_opampinitialize(int intf);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_STM32_OPAMP */
#endif /* __ARCH_ARM_SRC_STM32_STM32_OPAMP_H */

8
configs/nucleo-f334r8/include/board.h
View File

@ -237,8 +237,14 @@
#define GPIO_USART1_RX GPIO_USART1_RX_1 /* PA10 */
#define GPIO_USART1_TX GPIO_USART1_TX_1 /* PA9 */
/* HRTIM */
/* COMP */
/* OPAMP */
#define OPAMP2_VMSEL OPAMP2_VMSEL_PC5
#define OPAMP2_VPSEL OPAMP2_VPSEL_PB14
/* HRTIM */
/* DMA channels *************************************************************/
/* ADC */

12
configs/nucleo-f334r8/src/nucleo-f334r8.h
View File

@ -202,4 +202,16 @@ int stm32_can_setup(void);
int stm32_comp_setup(void);
#endif
/****************************************************************************
* Name: stm32_opamp_setup
*
* Description:
* Initialize OPAMP peripheral for the board.
*
****************************************************************************/
#ifdef CONFIG_OPAMP
int stm32_opamp_setup(void);
#endif
#endif /* __CONFIGS_NUCLEO_F334R8_SRC_NUCLEO_F334R8_H */

10
configs/nucleo-f334r8/src/stm32_appinit.c
View File

@ -137,6 +137,16 @@ int board_app_initialize(uintptr_t arg)
}
#endif
#ifdef CONFIG_OPAMP
/* Initialize OPAMP and register the OPAMP driver. */
ret = stm32_opamp_setup();
if (ret < 0)
{
syslog(LOG_ERR, "ERROR: stm32_opamp_setup failed: %d\n", ret);
}
#endif
UNUSED(ret);
return OK;
}

99
configs/nucleo-f334r8/src/stm32_opamp.c
View File

@ -0,0 +1,99 @@
/****************************************************************************
* configs/nucleo-f334r8/src/stm32_opamp.c
*
* Copyright (C) 2017 Gregory Nutt. All rights reserved.
* Author: Mateusz Szafoni <raiden00@railab.me>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdbool.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/board.h>
#include <nuttx/analog/opamp.h>
#include "stm32.h"
#if defined(CONFIG_OPAMP) && defined(CONFIG_STM32_OPAMP2)
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: stm32_opamp_setup
*
* Description:
* Initialize OPAMP
*
****************************************************************************/
int stm32_opamp_setup(void)
{
static bool initialized = false;
struct opamp_dev_s* opamp = NULL;
int ret;
if (!initialized)
{
/* Get the OPAMP interface */
#ifdef CONFIG_STM32_OPAMP2
opamp = stm32_opampinitialize(2);
if (opamp == NULL)
{
aerr("ERROR: Failed to get OPAMP%d interface\n", 2);
return -ENODEV;
}
#endif
/* Register the OPAMP character driver at /dev/opamp0 */
ret = opamp_register("/dev/opamp0", opamp);
if (ret < 0)
{
aerr("ERROR: opamp_register failed: %d\n", ret);
return ret;
}
initialized = true;
}
return OK;
}
#endif /* CONFIG_OPAMP && CONFIG_STM32_OPAMP2 */

6
drivers/analog/Kconfig
View File

@ -141,3 +141,9 @@ config DAC_AD5410
select SPI
endif # DAC
config OPAMP
bool "Operational Amplifier"
default n
---help---
Select to enable support for Operational Amplifiers (OPAMPs).

17
drivers/analog/Make.defs
View File

@ -60,6 +60,16 @@ CSRCS += comp.c
endif
# Check for OPAMP devices
ifeq ($(CONFIG_OPAMP),y)
# Include the common OPAMP character driver
CSRCS += opamp.c
endif
# Check for ADC devices
ifeq ($(CONFIG_ADC),y)
@ -105,6 +115,13 @@ ifeq ($(CONFIG_COMP),y)
DEPPATH += --dep-path analog
VPATH += :analog
CFLAGS += ${shell $(INCDIR) $(INCDIROPT) "$(CC)" $(TOPDIR)$(DELIM)drivers$(DELIM)analog}
else
ifeq ($(CONFIG_OPAMP),y)
DEPPATH += --dep-path analog
VPATH += :analog
CFLAGS += ${shell $(INCDIR) $(INCDIROPT) "$(CC)" $(TOPDIR)$(DELIM)drivers$(DELIM)analog}
endif
endif
endif
endif

243
drivers/analog/opamp.c Normal file
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@ -0,0 +1,243 @@
/****************************************************************************
* drivers/analog/opamp.c
*
* Copyright (C) 2017 Gregory Nutt. All rights reserved.
* Author: Mateusz Szafoni <raiden00@railab.me>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <unistd.h>
#include <semaphore.h>
#include <fcntl.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/semaphore.h>
#include <nuttx/fs/fs.h>
#include <nuttx/analog/opamp.h>
#include <nuttx/irq.h>
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static int opamp_open(FAR struct file *filep);
static int opamp_close(FAR struct file *filep);
static int opamp_ioctl(FAR struct file *filep, int cmd, unsigned long arg);
/****************************************************************************
* Private Data
****************************************************************************/
static const struct file_operations opamp_fops =
{
opamp_open, /* open */
opamp_close, /* close */
NULL, /* read */
NULL, /* write */
NULL, /* seek */
opamp_ioctl /* ioctl */
#ifndef CONFIG_DISABLE_POLL
, NULL /* poll */
#endif
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
, NULL /* unlink */
#endif
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: opamp_open
*
* Description:
* This function is called whenever the OPAMP device is opened.
*
****************************************************************************/
static int opamp_open(FAR struct file *filep)
{
FAR struct inode *inode = filep->f_inode;
FAR struct opamp_dev_s *dev = inode->i_private;
uint8_t tmp;
int ret = OK;
/* If the port is the middle of closing, wait until the close is finished */
if (sem_wait(&dev->ad_closesem) != OK)
{
ret = -errno;
}
else
{
/* Increment the count of references to the device. If this the first
* time that the driver has been opened for this device, then initialize
* the device.
*/
tmp = dev->ad_ocount + 1;
if (tmp == 0)
{
/* More than 255 opens; uint8_t overflows to zero */
ret = -EMFILE;
}
else
{
/* Check if this is the first time that the driver has been opened. */
if (tmp == 1)
{
/* Yes.. perform one time hardware initialization. */
irqstate_t flags = enter_critical_section();
ret = dev->ad_ops->ao_setup(dev);
if (ret == OK)
{
/* Save the new open count on success */
dev->ad_ocount = tmp;
}
leave_critical_section(flags);
}
}
sem_post(&dev->ad_closesem);
}
return ret;
}
/****************************************************************************
* Name: opamp_close
*
* Description:
* This routine is called when the OPAMP device is closed.
* It waits for the last remaining data to be sent.
*
****************************************************************************/
static int opamp_close(FAR struct file *filep)
{
FAR struct inode *inode = filep->f_inode;
FAR struct opamp_dev_s *dev = inode->i_private;
irqstate_t flags;
int ret = OK;
if (sem_wait(&dev->ad_closesem) != OK)
{
ret = -errno;
}
else
{
/* Decrement the references to the driver. If the reference count will
* decrement to 0, then uninitialize the driver.
*/
if (dev->ad_ocount > 1)
{
dev->ad_ocount--;
sem_post(&dev->ad_closesem);
}
else
{
/* There are no more references to the port */
dev->ad_ocount = 0;
/* Free the IRQ and disable the OPAMP device */
flags = enter_critical_section(); /* Disable interrupts */
dev->ad_ops->ao_shutdown(dev); /* Disable the OPAMP */
leave_critical_section(flags);
sem_post(&dev->ad_closesem);
}
}
return ret;
}
/****************************************************************************
* Name: opamp_ioctl
****************************************************************************/
static int opamp_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
{
FAR struct inode *inode = filep->f_inode;
FAR struct opamp_dev_s *dev = inode->i_private;
int ret;
ret = dev->ad_ops->ao_ioctl(dev, cmd, arg);
return ret;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: opamp_register
****************************************************************************/
int opamp_register(FAR const char *path, FAR struct opamp_dev_s *dev)
{
int ret;
/* Initialize the OPAMP device structure */
dev->ad_ocount = 0;
/* Initialize semaphores */
sem_init(&dev->ad_closesem, 0, 1);
/* Register the OPAMP character driver */
ret = register_driver(path, &opamp_fops, 0444, dev);
if (ret < 0)
{
sem_destroy(&dev->ad_closesem);
}
return ret;
}

109
include/nuttx/analog/opamp.h Normal file
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@ -0,0 +1,109 @@
/************************************************************************************
* include/nuttx/analog/opamp.h
*
* Copyright (C) 2017 Gregory Nutt. All rights reserved.
* Author: Mateusz Szafoni <raiden00@railab.me>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
#ifndef __INCLUDE_NUTTX_ANALOG_OPAMP_H
#define __INCLUDE_NUTTX_ANALOG_OPAMP_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <semaphore.h>
#include <nuttx/fs/fs.h>
/************************************************************************************
* Public Types
************************************************************************************/
struct opamp_dev_s;
struct opamp_ops_s
{
/* Configure the OPAMP. This method is called the first time that the OPAMP
* device is opened. This will occur when the port is first opened.
* This setup includes configuring and attaching OPAMP interrupts. Interrupts
* are all disabled upon return.
*/
CODE int (*ao_setup)(FAR struct opamp_dev_s *dev);
/* Disable the OPAMP. This method is called when the OPAMP device is closed.
* This method reverses the operation the setup method.
* Works only if OPAMP device is not locked.
*/
CODE void (*ao_shutdown)(FAR struct opamp_dev_s *dev);
/* All ioctl calls will be routed through this method */
CODE int (*ao_ioctl)(FAR struct opamp_dev_s *dev, int cmd, unsigned long arg);
};
struct opamp_dev_s
{
#ifdef CONFIG_OPAMP
/* Fields managed by common upper half OPAMP logic */
uint8_t ad_ocount; /* The number of times the device has been opened */
sem_t ad_closesem; /* Locks out new opens while close is in progress */
#endif
/* Fields provided by lower half OPAMP logic */
FAR const struct opamp_ops_s *ad_ops; /* Arch-specific operations */
FAR void *ad_priv; /* Used by the arch-specific logic */
};
/************************************************************************************
* Public Functions
************************************************************************************/
#if defined(__cplusplus)
extern "C"
{
#endif
int opamp_register(FAR const char *path, FAR struct opamp_dev_s *dev);
#if defined(__cplusplus)
}
#endif
#endif /* __INCLUDE_NUTTX_ANALOG_OPAMP_H */