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205 lines
6.8 KiB
205 lines
6.8 KiB
/************************************************************************************ |
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* arch/drivers/analog/ad5410.c |
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* |
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* Copyright (C) 2011 Li Zhuoyi. All rights reserved. |
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* Author: Li Zhuoyi <lzyy.cn@gmail.com> |
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* History: 0.1 2011-08-05 initial version |
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* |
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* This file is a part of NuttX: |
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* |
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* Copyright (C) 2010 Gregory Nutt. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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************************************************************************************/ |
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#include <nuttx/config.h> |
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#include <stdio.h> |
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#include <sys/types.h> |
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#include <stdint.h> |
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#include <stdbool.h> |
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#include <semaphore.h> |
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#include <errno.h> |
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#include <debug.h> |
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#include <arch/board/board.h> |
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#include <nuttx/arch.h> |
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#include <nuttx/analog/dac.h> |
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#include <nuttx/spi.h> |
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#if defined(CONFIG_DAC_AD5410) |
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#define AD5410_REG_NOP 0x00 |
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#define AD5410_REG_WR 0x01 |
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#define AD5410_REG_RD 0x02 |
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#define AD5410_REG_CMD 0x55 |
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#define AD5410_REG_RST 0x56 |
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#define AD5410_CMD_REXT (1<<13) |
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#define AD5410_CMD_OUTEN (1<<12) |
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#define AD5410_CMD_SRCLK(x) (x<<8) |
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#define AD5410_CMD_SRSTEP(x) (x<<5) |
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#define AD5410_CMD_SREN (1<<4) |
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#define AD5410_CMD_DCEN (1<<3) |
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#define AD5410_CMD_420MA 0x05 |
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#define AD5410_CMD_020MA 0x06 |
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#define AD5410_CMD_024MA 0x07 |
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/**************************************************************************** |
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* ad_private Types |
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****************************************************************************/ |
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struct up_dev_s |
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{ |
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int devno; |
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FAR struct spi_dev_s *spi; /* Cached SPI device reference */ |
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}; |
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/**************************************************************************** |
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* ad_private Function Prototypes |
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****************************************************************************/ |
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/* DAC methods */ |
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static void dac_reset(FAR struct dac_dev_s *dev); |
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static int dac_setup(FAR struct dac_dev_s *dev); |
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static void dac_shutdown(FAR struct dac_dev_s *dev); |
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static void dac_txint(FAR struct dac_dev_s *dev, bool enable); |
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static int dac_send(FAR struct dac_dev_s *dev, FAR struct dac_msg_s *msg); |
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static int dac_ioctl(FAR struct dac_dev_s *dev, int cmd, unsigned long arg); |
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static int dac_interrupt(int irq, void *context); |
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/**************************************************************************** |
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* ad_private Data |
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****************************************************************************/ |
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static const struct dac_ops_s g_dacops = |
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{ |
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.ao_reset =dac_reset, |
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.ao_setup = dac_setup, |
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.ao_shutdown = dac_shutdown, |
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.ao_txint = dac_txint, |
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.ao_send = dac_send, |
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.ao_ioctl = dac_ioctl, |
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}; |
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static struct up_dev_s g_dacpriv; |
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static struct dac_dev_s g_dacdev = |
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{ |
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.ad_ops = &g_dacops, |
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.ad_priv= &g_dacpriv, |
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}; |
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/**************************************************************************** |
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* ad_private Functions |
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****************************************************************************/ |
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/* Reset the DAC device. Called early to initialize the hardware. This |
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* is called, before ao_setup() and on error conditions. |
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*/ |
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static void dac_reset(FAR struct dac_dev_s *dev) |
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{ |
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} |
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/* Configure the DAC. This method is called the first time that the DAC |
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* device is opened. This will occur when the port is first opened. |
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* This setup includes configuring and attaching DAC interrupts. Interrupts |
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* are all disabled upon return. |
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*/ |
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static int dac_setup(FAR struct dac_dev_s *dev) |
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{ |
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FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->ad_priv; |
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FAR struct spi_dev_s *spi = priv->spi; |
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SPI_SELECT(spi, priv->devno, true); |
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SPI_SEND(spi,AD5410_REG_CMD); |
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SPI_SEND(spi,(AD5410_CMD_OUTEN|AD5410_CMD_420MA)>>8); |
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SPI_SEND(spi,AD5410_CMD_OUTEN|AD5410_CMD_420MA); |
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SPI_SELECT(spi, priv->devno, false); |
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return OK; |
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} |
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/* Disable the DAC. This method is called when the DAC device is closed. |
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* This method reverses the operation the setup method. |
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*/ |
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static void dac_shutdown(FAR struct dac_dev_s *dev) |
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{ |
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} |
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/* Call to enable or disable TX interrupts */ |
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static void dac_txint(FAR struct dac_dev_s *dev, bool enable) |
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{ |
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} |
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static int dac_send(FAR struct dac_dev_s *dev, FAR struct dac_msg_s *msg) |
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{ |
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FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->ad_priv; |
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FAR struct spi_dev_s *spi = priv->spi; |
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SPI_SELECT(spi, priv->devno, true); |
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SPI_SEND(spi,AD5410_REG_WR); |
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SPI_SEND(spi,(uint8_t)(msg->am_data>>24)); |
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SPI_SEND(spi,(uint8_t)(msg->am_data>>16)); |
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SPI_SELECT(spi, priv->devno, false); |
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dac_txdone(&g_dacdev); |
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return 0; |
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} |
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/* All ioctl calls will be routed through this method */ |
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static int dac_ioctl(FAR struct dac_dev_s *dev, int cmd, unsigned long arg) |
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{ |
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dbg("Fix me:Not Implemented\n"); |
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return 0; |
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} |
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/**************************************************************************** |
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* Public Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Name: up_ad5410cinitialize |
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* |
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* Description: |
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* Initialize the selected DAC port |
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* |
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* Input Parameter: |
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* Port number (for hardware that has mutiple DAC interfaces) |
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* |
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* Returned Value: |
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* Valid ad5410 device structure reference on succcess; a NULL on failure |
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* |
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****************************************************************************/ |
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FAR struct dac_dev_s *up_ad5410initialize(FAR struct spi_dev_s *spi, unsigned int devno) |
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{ |
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FAR struct up_dev_s *priv = (FAR struct up_dev_s *)g_dacdev.ad_priv; |
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priv->spi=spi; |
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priv->devno=devno; |
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return &g_dacdev; |
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} |
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#endif |
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