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Diffstat (limited to 'nuttx/drivers/analog/ad5410.c')
| -rw-r--r-- | nuttx/drivers/analog/ad5410.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/nuttx/drivers/analog/ad5410.c b/nuttx/drivers/analog/ad5410.c new file mode 100644 index 000000000..3e925a3a9 --- /dev/null +++ b/nuttx/drivers/analog/ad5410.c @@ -0,0 +1,205 @@ +/************************************************************************************ + * arch/drivers/analog/ad5410.c + * + * Copyright (C) 2011 Li Zhuoyi. All rights reserved. + * Author: Li Zhuoyi <lzyy.cn@gmail.com> + * History: 0.1 2011-08-05 initial version + * + * This file is a part of NuttX: + * + * Copyright (C) 2010 Gregory Nutt. All rights reserved. + * + * 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. + * + ************************************************************************************/ + +#include <nuttx/config.h> + +#include <stdio.h> +#include <sys/types.h> +#include <stdint.h> +#include <stdbool.h> +#include <semaphore.h> +#include <errno.h> +#include <debug.h> + +#include <arch/board/board.h> +#include <nuttx/arch.h> +#include <nuttx/analog/dac.h> +#include <nuttx/spi.h> + +#if defined(CONFIG_DAC_AD5410) + +#define AD5410_REG_NOP 0x00 +#define AD5410_REG_WR 0x01 +#define AD5410_REG_RD 0x02 +#define AD5410_REG_CMD 0x55 +#define AD5410_REG_RST 0x56 + +#define AD5410_CMD_REXT (1<<13) +#define AD5410_CMD_OUTEN (1<<12) +#define AD5410_CMD_SRCLK(x) (x<<8) +#define AD5410_CMD_SRSTEP(x) (x<<5) +#define AD5410_CMD_SREN (1<<4) +#define AD5410_CMD_DCEN (1<<3) +#define AD5410_CMD_420MA 0x05 +#define AD5410_CMD_020MA 0x06 +#define AD5410_CMD_024MA 0x07 + +/**************************************************************************** + * ad_private Types + ****************************************************************************/ +struct up_dev_s +{ + int devno; + FAR struct spi_dev_s *spi; /* Cached SPI device reference */ +}; + +/**************************************************************************** + * ad_private Function Prototypes + ****************************************************************************/ + +/* DAC methods */ + +static void dac_reset(FAR struct dac_dev_s *dev); +static int dac_setup(FAR struct dac_dev_s *dev); +static void dac_shutdown(FAR struct dac_dev_s *dev); +static void dac_txint(FAR struct dac_dev_s *dev, bool enable); +static int dac_send(FAR struct dac_dev_s *dev, FAR struct dac_msg_s *msg); +static int dac_ioctl(FAR struct dac_dev_s *dev, int cmd, unsigned long arg); +static int dac_interrupt(int irq, void *context); + +/**************************************************************************** + * ad_private Data + ****************************************************************************/ + +static const struct dac_ops_s g_dacops = +{ + .ao_reset =dac_reset, + .ao_setup = dac_setup, + .ao_shutdown = dac_shutdown, + .ao_txint = dac_txint, + .ao_send = dac_send, + .ao_ioctl = dac_ioctl, +}; + +static struct up_dev_s g_dacpriv; +static struct dac_dev_s g_dacdev = +{ + .ad_ops = &g_dacops, + .ad_priv= &g_dacpriv, +}; + +/**************************************************************************** + * ad_private Functions + ****************************************************************************/ + +/* Reset the DAC device. Called early to initialize the hardware. This +* is called, before ao_setup() and on error conditions. +*/ +static void dac_reset(FAR struct dac_dev_s *dev) +{ + +} + +/* Configure the DAC. This method is called the first time that the DAC +* device is opened. This will occur when the port is first opened. +* This setup includes configuring and attaching DAC interrupts. Interrupts +* are all disabled upon return. +*/ +static int dac_setup(FAR struct dac_dev_s *dev) +{ + FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->ad_priv; + FAR struct spi_dev_s *spi = priv->spi; + SPI_SELECT(spi, priv->devno, true); + SPI_SEND(spi,AD5410_REG_CMD); + SPI_SEND(spi,(AD5410_CMD_OUTEN|AD5410_CMD_420MA)>>8); + SPI_SEND(spi,AD5410_CMD_OUTEN|AD5410_CMD_420MA); + SPI_SELECT(spi, priv->devno, false); + return OK; +} + +/* Disable the DAC. This method is called when the DAC device is closed. +* This method reverses the operation the setup method. +*/ +static void dac_shutdown(FAR struct dac_dev_s *dev) +{ +} + +/* Call to enable or disable TX interrupts */ +static void dac_txint(FAR struct dac_dev_s *dev, bool enable) +{ +} + +static int dac_send(FAR struct dac_dev_s *dev, FAR struct dac_msg_s *msg) +{ + FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->ad_priv; + FAR struct spi_dev_s *spi = priv->spi; + SPI_SELECT(spi, priv->devno, true); + SPI_SEND(spi,AD5410_REG_WR); + SPI_SEND(spi,(uint8_t)(msg->am_data>>24)); + SPI_SEND(spi,(uint8_t)(msg->am_data>>16)); + SPI_SELECT(spi, priv->devno, false); + dac_txdone(&g_dacdev); + return 0; +} + +/* All ioctl calls will be routed through this method */ +static int dac_ioctl(FAR struct dac_dev_s *dev, int cmd, unsigned long arg) +{ + dbg("Fix me:Not Implemented\n"); + return 0; +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_ad5410cinitialize + * + * Description: + * Initialize the selected DAC port + * + * Input Parameter: + * Port number (for hardware that has mutiple DAC interfaces) + * + * Returned Value: + * Valid ad5410 device structure reference on succcess; a NULL on failure + * + ****************************************************************************/ + +FAR struct dac_dev_s *up_ad5410initialize(FAR struct spi_dev_s *spi, unsigned int devno) +{ + FAR struct up_dev_s *priv = (FAR struct up_dev_s *)g_dacdev.ad_priv; + priv->spi=spi; + priv->devno=devno; + return &g_dacdev; +} +#endif + |