ZKIT-ARM-1769 support for ADC and DAC from Rashid
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5723 42af7a65-404d-4744-a932-0658087f49c3
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patacongo
parent
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2 changed files with 145 additions and 67 deletions
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@ -7,7 +7,7 @@
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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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* Copyright (C) 2010, 2013 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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@ -66,6 +66,10 @@
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#if defined(CONFIG_LPC17_ADC)
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef CONFIG_ADC0_MASK
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#define CONFIG_ADC0_MASK 0x01
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#endif
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@ -82,11 +86,11 @@
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struct up_dev_s
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{
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uint8_t mask;
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uint8_t mask;
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uint32_t sps;
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int irq;
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int32_t buf[8];
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uint8_t count[8];
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int irq;
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int32_t buf[8];
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uint8_t count[8];
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};
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/****************************************************************************
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@ -108,39 +112,45 @@ static int adc_interrupt(int irq, void *context);
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static const struct adc_ops_s g_adcops =
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{
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.ao_reset =adc_reset,
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.ao_setup = adc_setup,
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.ao_reset = adc_reset,
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.ao_setup = adc_setup,
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.ao_shutdown = adc_shutdown,
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.ao_rxint = adc_rxint,
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.ao_ioctl = adc_ioctl,
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.ao_rxint = adc_rxint,
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.ao_ioctl = adc_ioctl,
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};
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static struct up_dev_s g_adcpriv =
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{
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.sps = CONFIG_ADC0_SPS,
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.mask = CONFIG_ADC0_MASK,
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.irq = LPC17_IRQ_ADC,
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.sps = CONFIG_ADC0_SPS,
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.mask = CONFIG_ADC0_MASK,
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.irq = LPC17_IRQ_ADC,
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};
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static struct adc_dev_s g_adcdev =
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{
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.ad_ops = &g_adcops,
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.ad_priv= &g_adcpriv,
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.ad_ops = &g_adcops,
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.ad_priv = &g_adcpriv,
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/* Reset the ADC 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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/****************************************************************************
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* Name: adc_reset
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*
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* Description:
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* Reset the ADC device. Called early to initialize the hardware. This
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* is called, before adc_setup() and on error conditions.
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*
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****************************************************************************/
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static void adc_reset(FAR struct adc_dev_s *dev)
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{
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irqstate_t flags;
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uint32_t regval;
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FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->ad_priv;
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irqstate_t flags;
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uint32_t clkdiv;
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uint32_t regval;
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flags = irqsave();
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@ -148,110 +158,176 @@ static void adc_reset(FAR struct adc_dev_s *dev)
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regval |= SYSCON_PCONP_PCADC;
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putreg32(regval, LPC17_SYSCON_PCONP);
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putreg32(ADC_CR_PDN,LPC17_ADC_CR);
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putreg32(ADC_CR_PDN, LPC17_ADC_CR);
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regval = getreg32(LPC17_SYSCON_PCLKSEL0);
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regval &= ~SYSCON_PCLKSEL0_ADC_MASK;
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regval |= (SYSCON_PCLKSEL_CCLK8 << SYSCON_PCLKSEL0_ADC_SHIFT);
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putreg32(regval, LPC17_SYSCON_PCLKSEL0);
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uint32_t clkdiv=LPC17_CCLK/8/65/priv->sps;
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clkdiv<<=8;
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clkdiv&=0xff00;
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putreg32(ADC_CR_PDN|ADC_CR_BURST|clkdiv|priv->mask,LPC17_ADC_CR);
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clkdiv = LPC17_CCLK / 8 / 65 / priv->sps;
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clkdiv <<= 8;
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clkdiv &= 0xff00;
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putreg32(ADC_CR_PDN | ADC_CR_BURST | clkdiv | priv->mask, LPC17_ADC_CR);
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if(priv->mask&0x01)
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lpc17_configgpio(GPIO_AD0p0);
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else if(priv->mask&0x02)
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lpc17_configgpio(GPIO_AD0p1);
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else if(priv->mask&0x04)
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lpc17_configgpio(GPIO_AD0p2);
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else if(priv->mask&0x08)
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lpc17_configgpio(GPIO_AD0p3);
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else if(priv->mask&0x10)
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lpc17_configgpio(GPIO_AD0p4);
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else if(priv->mask&0x20)
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lpc17_configgpio(GPIO_AD0p5);
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else if(priv->mask&0x40)
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lpc17_configgpio(GPIO_AD0p6);
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else if(priv->mask&0x80)
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lpc17_configgpio(GPIO_AD0p7);
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if ((priv->mask & 0x01) != 0)
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{
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lpc17_configgpio(GPIO_AD0p0);
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}
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else if ((priv->mask & 0x02) != 0)
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{
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lpc17_configgpio(GPIO_AD0p1);
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}
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else if ((priv->mask & 0x04) != 0)
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{
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lpc17_configgpio(GPIO_AD0p2);
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}
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else if ((priv->mask & 0x08) != 0)
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{
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lpc17_configgpio(GPIO_AD0p3);
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}
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else if ((priv->mask & 0x10) != 0)
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{
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lpc17_configgpio(GPIO_AD0p4);
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}
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else if ((priv->mask & 0x20) != 0)
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{
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lpc17_configgpio(GPIO_AD0p5);
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}
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else if ((priv->mask & 0x40) != 0)
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{
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lpc17_configgpio(GPIO_AD0p6);
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}
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else if ((priv->mask & 0x80) != 0)
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{
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lpc17_configgpio(GPIO_AD0p7);
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}
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irqrestore(flags);
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}
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/* Configure the ADC. This method is called the first time that the ADC
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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 ADC interrupts. Interrupts
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* are all disabled upon return.
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*/
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/****************************************************************************
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* Name: adc_setup
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*
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* Description:
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* Configure the ADC. This method is called the first time that the ADC
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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 ADC interrupts. Interrupts
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* are all disabled upon return.
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*
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****************************************************************************/
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static int adc_setup(FAR struct adc_dev_s *dev)
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static int adc_setup(FAR struct adc_dev_s *dev)
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{
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int i;
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FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->ad_priv;
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int i;
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int ret = irq_attach(priv->irq, adc_interrupt);
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if (ret == OK)
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{
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for (i = 0; i < 8; i++)
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{
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priv->buf[i]=0;
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priv->count[i]=0;
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priv->buf[i] = 0;
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priv->count[i] = 0;
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}
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up_enable_irq(priv->irq);
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}
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return ret;
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}
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/* Disable the ADC. This method is called when the ADC device is closed.
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* This method reverses the operation the setup method.
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*/
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/****************************************************************************
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* Name: adc_shutdown
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*
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* Description:
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* Disable the ADC. This method is called when the ADC device is closed.
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* This method reverses the operation the setup method.
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*
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****************************************************************************/
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static void adc_shutdown(FAR struct adc_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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/* Disable ADC interrupts, both at the level of the ADC device and at the
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* level of the NVIC.
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*/
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putreg32(0, LPC17_ADC_INTEN);
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up_disable_irq(priv->irq);
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/* Then detach the ADC interrupt handler. */
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irq_detach(priv->irq);
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}
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/* Call to enable or disable RX interrupts */
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/****************************************************************************
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* Name: adc_rxint
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*
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* Description:
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* Call to enable or disable RX interrupts
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*
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****************************************************************************/
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static void adc_rxint(FAR struct adc_dev_s *dev, bool enable)
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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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if (enable)
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putreg32(ADC_INTEN_GLOBAL, LPC17_ADC_INTEN);
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{
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putreg32(ADC_INTEN_GLOBAL, LPC17_ADC_INTEN);
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}
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else
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putreg32(0x00, LPC17_ADC_INTEN);
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{
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putreg32(0, LPC17_ADC_INTEN);
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}
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}
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/* All ioctl calls will be routed through this method */
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/****************************************************************************
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* Name: adc_ioctl
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*
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* Description:
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* All ioctl calls will be routed through this method
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*
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****************************************************************************/
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static int adc_ioctl(FAR struct adc_dev_s *dev, int cmd, unsigned long arg)
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static int adc_ioctl(FAR struct adc_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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/* No ioctl commands supported */
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return -ENOTTY;
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}
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/****************************************************************************
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* Name: adc_interrupt
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*
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* Description:
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* ADC interrupt handler
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*
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****************************************************************************/
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static int adc_interrupt(int irq, void *context)
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{
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uint32_t regval;
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FAR struct up_dev_s *priv = (FAR struct up_dev_s *)g_adcdev.ad_priv;
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uint32_t regval;
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unsigned char ch;
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int32_t value;
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regval = getreg32(LPC17_ADC_GDR);
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ch = (regval >> 24) & 0x07;
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priv->buf[ch] += regval & 0xfff0;
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regval = getreg32(LPC17_ADC_GDR);
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ch = (regval >> 24) & 0x07;
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priv->buf[ch] += regval & 0xfff0;
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priv->count[ch]++;
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if (priv->count[ch] >= CONFIG_ADC0_AVERAGE)
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{
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value = priv->buf[ch] / priv->count[ch];
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value <<= 15;
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value = priv->buf[ch] / priv->count[ch];
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value <<= 15;
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adc_receive(&g_adcdev,ch,value);
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priv->buf[ch] = 0;
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priv->buf[ch] = 0;
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priv->count[ch] = 0;
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}
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return OK;
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}
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@ -274,5 +350,5 @@ FAR struct adc_dev_s *lpc17_adcinitialize(void)
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{
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return &g_adcdev;
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}
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#endif
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#endif /* CONFIG_LPC17_ADC */
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@ -62,6 +62,8 @@
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#include "chip.h"
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#include "chip/lpc17_syscon.h"
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#include "chip/lpc17_pinconfig.h"
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#include "lpc17_gpio.h"
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#include "lpc17_dac.h"
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#ifdef CONFIG_LPC17_DAC
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