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Diffstat (limited to 'nuttx/drivers/analog/ads1255.c')
| -rw-r--r-- | nuttx/drivers/analog/ads1255.c | 335 |
1 files changed, 0 insertions, 335 deletions
diff --git a/nuttx/drivers/analog/ads1255.c b/nuttx/drivers/analog/ads1255.c deleted file mode 100644 index 374decc54..000000000 --- a/nuttx/drivers/analog/ads1255.c +++ /dev/null @@ -1,335 +0,0 @@ -/************************************************************************************ - * arch/drivers/analog/ads1255.c - * - * Copyright (C) 2011 Li Zhuoyi. All rights reserved. - * Author: Li Zhuoyi <lzyy.cn@gmail.com> - * History: 0.1 2011-08-05 initial version - * 0.2 2011-08-25 fix bug in g_adcdev (cd_ops -> ad_ops,cd_priv -> ad_priv) - * - * 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/spi.h> -#include <nuttx/analog/adc.h> - -#if defined(CONFIG_ADC_ADS1255) - -#define ADS125X_BUFON 0x02 -#define ADS125X_BUFOFF 0x00 - -#define ADS125X_PGA1 0x00 -#define ADS125X_PGA2 0x01 -#define ADS125X_PGA4 0x02 -#define ADS125X_PGA8 0x03 -#define ADS125X_PGA16 0x04 -#define ADS125X_PGA32 0x05 -#define ADS125X_PGA64 0x06 - -#define ADS125X_RDATA 0x01 //Read Data -#define ADS125X_RDATAC 0x03 //Read Data Continuously -#define ADS125X_SDATAC 0x0F //Stop Read Data Continuously -#define ADS125X_RREG 0x10 //Read from REG -#define ADS125X_WREG 0x50 //Write to REG -#define ADS125X_SELFCAL 0xF0 //Offset and Gain Self-Calibration -#define ADS125X_SELFOCAL 0xF1 //Offset Self-Calibration -#define ADS125X_SELFGCAL 0xF2 //Gain Self-Calibration -#define ADS125X_SYSOCAL 0xF3 //System Offset Calibration -#define ADS125X_SYSGCAL 0xF4 //System Gain Calibration -#define ADS125X_SYNC 0xFC //Synchronize the A/D Conversion -#define ADS125X_STANDBY 0xFD //Begin Standby Mode -#define ADS125X_RESET 0xFE //Reset to Power-Up Values -#define ADS125X_WAKEUP 0xFF //Completes SYNC and Exits Standby Mode - -#ifndef CONFIG_ADS1255_FREQUENCY -#define CONFIG_ADS1255_FREQUENCY 1000000 -#endif -#ifndef CONFIG_ADS1255_MUX -#define CONFIG_ADS1255_MUX 0x01 -#endif -#ifndef CONFIG_ADS1255_CHMODE -#define CONFIG_ADS1255_CHMODE 0x00 -#endif -#ifndef CONFIG_ADS1255_BUFON -#define CONFIG_ADS1255_BUFON 1 -#endif -#ifndef CONFIG_ADS1255_PGA -#define CONFIG_ADS1255_PGA ADS125X_PGA2 -#endif -#ifndef CONFIG_ADS1255_SPS -#define CONFIG_ADS1255_SPS 50 -#endif - -/**************************************************************************** - * ad_private Types - ****************************************************************************/ - -struct up_dev_s -{ - uint8_t channel; - uint32_t sps; - uint8_t pga; - uint8_t buf; - const uint8_t *mux; - int irq; - int devno; - FAR struct spi_dev_s *spi; /* Cached SPI device reference */ -}; - -/**************************************************************************** - * ad_private Function Prototypes - ****************************************************************************/ - -/* ADC methods */ - -static void adc_reset(FAR struct adc_dev_s *dev); -static int adc_setup(FAR struct adc_dev_s *dev); -static void adc_shutdown(FAR struct adc_dev_s *dev); -static void adc_rxint(FAR struct adc_dev_s *dev, bool enable); -static int adc_ioctl(FAR struct adc_dev_s *dev, int cmd, unsigned long arg); -static int adc_interrupt(int irq, void *context); - -/**************************************************************************** - * ad_private Data - ****************************************************************************/ - -static const struct adc_ops_s g_adcops = -{ - .ao_reset = adc_reset, /* ao_reset */ - .ao_setup = adc_setup, /* ao_setup */ - .ao_shutdown = adc_shutdown, /* ao_shutdown */ - .ao_rxint = adc_rxint, /* ao_rxint */ - .ao_ioctl = adc_ioctl /* ao_read */ -}; - -static struct up_dev_s g_adcpriv = -{ - .mux = (const uint8_t []) - { - CONFIG_ADS1255_MUX,0 - }, - .sps = CONFIG_ADS1255_SPS, - .channel = 0, - .irq = CONFIG_ADS1255_IRQ, -}; - -static struct adc_dev_s g_adcdev = -{ - .ad_ops = &g_adcops, - .ad_priv= &g_adcpriv, -}; - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -static uint8_t getspsreg(uint16_t sps) -{ - static const unsigned short sps_tab[]= - { - 3,7,12,20,27,40,55,80,300,750,1500,3000,5000,10000,20000,65535, - }; - static const unsigned char sps_reg[]= - { - 0x03,0x13,0x23,0x33,0x43,0x53,0x63,0x72,0x82,0x92,0xa1,0xb0,0xc0,0xd0,0xe0,0xf0, - }; - int i; - for (i=0; i<16; i++) - { - if (sps<sps_tab[i]) - break; - } - return sps_reg[i]; -} - -/**************************************************************************** - * ad_private Functions - ****************************************************************************/ -/* Reset the ADC device. Called early to initialize the hardware. This -* is called, before ao_setup() and on error conditions. -*/ - -static void adc_reset(FAR struct adc_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_SETMODE(spi, SPIDEV_MODE1); - SPI_SETBITS(spi, 8); - SPI_SETFREQUENCY(spi, CONFIG_ADS1255_FREQUENCY); - usleep(1000); - SPI_SELECT(spi, priv->devno, true); - SPI_SEND(spi,ADS125X_WREG+0x03); //WRITE SPS REG - SPI_SEND(spi,0x00); //count=1 - SPI_SEND(spi,0x63); - SPI_SELECT(spi, priv->devno, false); -} - -/* Configure the ADC. This method is called the first time that the ADC -* device is opened. This will occur when the port is first opened. -* This setup includes configuring and attaching ADC interrupts. Interrupts -* are all disabled upon return. -*/ - -static int adc_setup(FAR struct adc_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; - int ret = irq_attach(priv->irq, adc_interrupt); - if (ret == OK) - { - SPI_SELECT(spi, priv->devno, true); - SPI_SEND(spi,ADS125X_WREG); //WRITE REG from 0 - SPI_SEND(spi,0x03); //count=4+1 - if (priv->buf) - SPI_SEND(spi,ADS125X_BUFON); //REG0 STATUS BUFFER ON - else - SPI_SEND(spi,ADS125X_BUFOFF); - SPI_SEND(spi,priv->mux[0]); - SPI_SEND(spi,priv->pga); //REG2 ADCON PGA=2 - SPI_SEND(spi,getspsreg(priv->sps)); - usleep(1000); - SPI_SEND(spi,ADS125X_SELFCAL); - SPI_SELECT(spi, priv->devno, false); - up_enable_irq(priv->irq); - } - return ret; -} - -/* Disable the ADC. This method is called when the ADC device is closed. -* This method reverses the operation the setup method. -*/ - -static void adc_shutdown(FAR struct adc_dev_s *dev) -{ - FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->ad_priv; - up_disable_irq(priv->irq); - irq_detach(priv->irq); -} - -/* Call to enable or disable RX interrupts */ - -static void adc_rxint(FAR struct adc_dev_s *dev, bool enable) -{ - FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->ad_priv; - if (enable) - up_enable_irq(priv->irq); - else - up_disable_irq(priv->irq); -} - -/* All ioctl calls will be routed through this method */ - -static int adc_ioctl(FAR struct adc_dev_s *dev, int cmd, unsigned long arg) -{ - dbg("Fix me:Not Implemented\n"); - return 0; -} - -static int adc_interrupt(int irq, void *context) -{ - uint32_t regval; - FAR struct up_dev_s *priv = (FAR struct up_dev_s *)g_adcdev.ad_priv; - FAR struct spi_dev_s *spi = priv->spi; - unsigned char buf[4]; - unsigned char ch; - - SPI_SELECT(spi, priv->devno, true); - SPI_SEND(spi,ADS125X_RDATA); - up_udelay(10); - buf[3]=SPI_SEND(spi,0xff); - buf[2]=SPI_SEND(spi,0xff); - buf[1]=SPI_SEND(spi,0xff); - buf[0]=0; - - priv->channel++; - ch = priv->mux[priv->channel]; - if ( ch == 0 ) - { - priv->channel=0; - ch = priv->mux[0]; - } - - SPI_SEND(spi,ADS125X_WREG+0x01); - SPI_SEND(spi,0x00); - SPI_SEND(spi,ch); - SPI_SEND(spi,ADS125X_SYNC); - up_udelay(2); - SPI_SEND(spi,ADS125X_WAKEUP); - SPI_SELECT(spi, priv->devno, false); - - adc_receive(&g_adcdev,priv->channel,*(int32_t *)buf); - return OK; -} - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: up_ads1255initialize - * - * Description: - * Initialize the selected adc port - * - * Input Parameter: - * Port number (for hardware that has mutiple adc interfaces) - * - * Returned Value: - * Valid can device structure reference on succcess; a NULL on failure - * - ****************************************************************************/ - -FAR struct adc_dev_s *up_ads1255initialize(FAR struct spi_dev_s *spi, unsigned int devno) -{ - FAR struct up_dev_s *priv = (FAR struct up_dev_s *)g_adcdev.ad_priv; - - /* Driver state data */ - - priv->spi = spi; - priv->devno = devno; - return &g_adcdev; -} -#endif - |