aboutsummaryrefslogtreecommitdiff
path: root/nuttx/drivers/input/stmpe811_adc.c
diff options
context:
space:
mode:
Diffstat (limited to 'nuttx/drivers/input/stmpe811_adc.c')
-rw-r--r--nuttx/drivers/input/stmpe811_adc.c266
1 files changed, 0 insertions, 266 deletions
diff --git a/nuttx/drivers/input/stmpe811_adc.c b/nuttx/drivers/input/stmpe811_adc.c
deleted file mode 100644
index 1ffe987e6..000000000
--- a/nuttx/drivers/input/stmpe811_adc.c
+++ /dev/null
@@ -1,266 +0,0 @@
-/****************************************************************************
- * drivers/input/stmpe811_adc.c
- *
- * Copyright (C) 2012 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * References:
- * "STMPE811 S-Touch® advanced resistive touchscreen controller with 8-bit
- * GPIO expander," Doc ID 14489 Rev 6, CD00186725, STMicroelectronics"
- *
- * 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 <unistd.h>
-#include <assert.h>
-#include <errno.h>
-#include <debug.h>
-
-#include <nuttx/arch.h>
-#include <nuttx/input/stmpe811.h>
-
-#include "stmpe811.h"
-
-#if defined(CONFIG_INPUT) && defined(CONFIG_INPUT_STMPE811) && !defined(CONFIG_STMPE811_ADC_DISABLE)
-
-/****************************************************************************
- * Private Types
- ****************************************************************************/
-
-/****************************************************************************
- * Private Data
- ****************************************************************************/
-
-/****************************************************************************
- * Private Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: stmpe811_adcinitialize
- *
- * Description:
- * Configure for ADC mode operation. Set overall ADC ADC timing that
- * applies to all pins.
- *
- * Input Parameters:
- * handle - The handle previously returned by stmpe811_instantiate
- *
- * Returned Value:
- * Zero is returned on success. Otherwise, a negated errno value is
- * returned to indicate the nature of the failure.
- *
- ****************************************************************************/
-
-int stmpe811_adcinitialize(STMPE811_HANDLE handle)
-{
- FAR struct stmpe811_dev_s *priv = (FAR struct stmpe811_dev_s *)handle;
- uint8_t regval;
- int ret;
-
- DEBUGASSERT(handle);
-
- /* Get exclusive access to the device structure */
-
- ret = sem_wait(&priv->exclsem);
- if (ret < 0)
- {
- int errval = errno;
- idbg("sem_wait failed: %d\n", errval);
- return -errval;
- }
-
- /* Enable Clocking for ADC */
-
- regval = stmpe811_getreg8(priv, STMPE811_SYS_CTRL2);
- regval &= ~SYS_CTRL2_ADC_OFF;
- stmpe811_putreg8(priv, STMPE811_SYS_CTRL2, regval);
-
- /* Select Sample Time, bit number and ADC Reference */
-
- stmpe811_putreg8(priv, STMPE811_ADC_CTRL1, priv->config->ctrl1);
-
- /* Wait for 20 ms */
-
- up_mdelay(20);
-
- /* Select the ADC clock speed */
-
- stmpe811_putreg8(priv, STMPE811_ADC_CTRL2, priv->config->ctrl2);
-
- /* Mark ADC initialized */
-
- priv->flags |= STMPE811_FLAGS_ADC_INITIALIZED;
- sem_post(&priv->exclsem);
- return OK;
-}
-
-/****************************************************************************
- * Name: stmpe811_adcconfig
- *
- * Description:
- * Configure a pin for ADC input.
- *
- * Input Parameters:
- * handle - The handle previously returned by stmpe811_instantiate
- * pin - The ADC pin number
- *
- * Returned Value:
- * Zero is returned on success. Otherwise, a negated errno value is
- * returned to indicate the nature of the failure.
- *
- ****************************************************************************/
-
-int stmpe811_adcconfig(STMPE811_HANDLE handle, int pin)
-{
- FAR struct stmpe811_dev_s *priv = (FAR struct stmpe811_dev_s *)handle;
- uint8_t pinmask = GPIO_PIN(pin);
- uint8_t regval;
- int ret;
-
- DEBUGASSERT(handle && (unsigned)pin < STMPE811_ADC_NPINS);
-
- /* Get exclusive access to the device structure */
-
- ret = sem_wait(&priv->exclsem);
- if (ret < 0)
- {
- int errval = errno;
- idbg("sem_wait failed: %d\n", errval);
- return -errval;
- }
-
- /* Make sure that the pin is not already in use */
-
- if ((priv->inuse & pinmask) != 0)
- {
- idbg("PIN%d is already in-use\n", pin);
- sem_post(&priv->exclsem);
- return -EBUSY;
- }
-
- /* Clear the alternate function bit for the pin, making it an ADC input
- * (or perhaps an an external reference, depending on the state of the
- * ADC_CTRL1_REF_SEL bit).
- */
-
- regval = stmpe811_getreg8(priv, STMPE811_GPIO_AF);
- regval &= ~pinmask;
- stmpe811_putreg8(priv, STMPE811_GPIO_AF, regval);
-
- /* Mark the pin as 'in use' */
-
- priv->inuse |= pinmask;
- sem_post(&priv->exclsem);
- return OK;
-}
-
-/****************************************************************************
- * Name: stmpe811_adcread
- *
- * Description:
- * Read the converted analog input value from the select pin.
- *
- * Input Parameters:
- * handle - The handle previously returned by stmpe811_instantiate
- * pin - The ADC pin number
- *
- * Returned Value:
- * The converted value (there is no error reporting mechanism).
- *
- ****************************************************************************/
-
-uint16_t stmpe811_adcread(STMPE811_HANDLE handle, int pin)
-{
- FAR struct stmpe811_dev_s *priv = (FAR struct stmpe811_dev_s *)handle;
- uint8_t pinmask = GPIO_PIN(pin);
- uint8_t regval;
- int i;
- int ret;
-
- DEBUGASSERT(handle && (unsigned)pin < 8);
-
- /* Get exclusive access to the device structure */
-
- ret = sem_wait(&priv->exclsem);
- if (ret < 0)
- {
- int errval = errno;
- idbg("sem_wait failed: %d\n", errval);
- return -errval;
- }
-
- /* Request AD conversion by setting the bit corresponding the pin in the
- * ADC CAPT register.
- */
-
- stmpe811_putreg8(priv, STMPE811_ADC_CAPT, pinmask);
-
- /* Wait for the conversion to complete. The ADC CAPT register reads '1'
- * if conversion is completed. Reads '0' if conversion is in progress.
- * Try three times before giving up.
- */
-
- for (i = 0; i < 3; i++)
- {
- /* The worst case ADC conversion time is (nominally) 56.4 uS. The
- * following usleep() looks nice but in reality, the usleep()
- * does not have that kind of precision (it will probably end up
- * waiting 10 MS).
- */
-
- usleep(57);
-
- /* Check if the conversion is complete */
-
- regval = stmpe811_getreg8(priv, STMPE811_ADC_CAPT);
- if ((regval & pinmask) != 0)
- {
- break;
- }
- }
-
- /* At the completion of the conversion, return whatever we read from
- * from the channel register associated with the pin.
- */
-
- return stmpe811_getreg16(priv, STMPE811_ADC_DATACH(pin));
-}
-
-#endif /* CONFIG_INPUT && CONFIG_INPUT_STMPE811 && !CONFIG_STMPE811_ADC_DISABLE */
-
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-11 05:43:43 +0000