nuttx/boards/arm/stm32h7/nucleo-h745zi/src/stm32_adc.c

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2024-02-10 13:24:55 +01:00
/****************************************************************************
* boards/arm/stm32h7/nucleo-h745zi/src/stm32_adc.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <errno.h>
#include <debug.h>
#include <stdio.h>
#include <nuttx/board.h>
#include <nuttx/analog/adc.h>
#include <arch/board/board.h>
#include "chip.h"
#include "stm32_gpio.h"
#include "stm32_adc.h"
#include "nucleo-h745zi.h"
#ifdef CONFIG_ADC
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* Up to 3 ADC interfaces are supported */
#if defined(CONFIG_STM32H7_ADC1) || defined(CONFIG_STM32H7_ADC2) || \
defined(CONFIG_STM32H7_ADC3)
#ifndef CONFIG_STM32H7_ADC1
# warning "Channel information only available for ADC1"
#endif
/* The number of ADC channels in the conversion list */
#define ADC1_NCHANNELS 5
#define ADC3_NCHANNELS 1
/****************************************************************************
* Private Data
****************************************************************************/
#ifdef CONFIG_STM32H7_ADC1
/* Identifying number of each ADC channel: Variable Resistor.
*
* ADC1: {5, 10, 12, 13, 15};
*/
static const uint8_t g_adc1_chanlist[ADC1_NCHANNELS] =
{
5, 10, 12, 13, 15
};
/* Configurations of pins used by each ADC channels
*
* ADC1:
* {GPIO_ADC12_INP5, GPIO_ADC123_INP10, GPIO_ADC123_INP12, GPIO_ADC12_INP13,
* GPIO_ADC12_INP15};
*/
static const uint32_t g_adc1_pinlist[ADC1_NCHANNELS] =
{
GPIO_ADC12_INP5,
GPIO_ADC123_INP10,
GPIO_ADC123_INP12,
GPIO_ADC12_INP13,
GPIO_ADC12_INP15
};
#endif
#ifdef CONFIG_STM32H7_ADC3
/* Identifying number of each ADC channel: Variable Resistor.
*
* ADC3: {6,};
*/
static const uint8_t g_adc3_chanlist[ADC1_NCHANNELS] =
{
6
};
/* Configurations of pins used by each ADC channels
*
*
* ADC3: {GPIO_ADC3_INP6}
*/
static const uint32_t g_adc3_pinlist[ADC3_NCHANNELS] =
{
GPIO_ADC3_INP6
};
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: stm32_adc_setup
*
* Description:
* Initialize ADC and register the ADC driver.
*
****************************************************************************/
int stm32_adc_setup(int adcno)
{
#if defined(CONFIG_STM32H7_ADC1) || defined(CONFIG_STM32H7_ADC3)
static bool initialized = false;
struct adc_dev_s *adc;
int ret;
int i;
char devname[10];
/* Check if we have already initialized */
if (!initialized)
{
snprintf(devname, 1, "/dev/adc%d", adcno);
#endif
#if defined(CONFIG_STM32H7_ADC1)
/* Configure the pins as analog inputs for the selected channels */
for (i = 0; i < ADC1_NCHANNELS; i++)
{
if (g_adc1_pinlist[i] != 0)
{
stm32_configgpio(g_adc1_pinlist[i]);
}
}
/* Call stm32_adcinitialize() to get an instance of the ADC interface */
adc = stm32h7_adc_initialize(1, g_adc1_chanlist, ADC1_NCHANNELS);
if (adc == NULL)
{
aerr("ERROR: Failed to get ADC1 interface\n");
return -ENODEV;
}
/* Register the ADC driver at "/dev/adc0" */
ret = adc_register(devname, adc);
if (ret < 0)
{
aerr("ERROR: adc_register(%s) failed: %d\n", devname, ret);
return ret;
}
devname[8]++;
#endif
#if defined(CONFIG_STM32H7_ADC3)
/* Configure the pins as analog inputs for the selected channels */
for (i = 0; i < ADC3_NCHANNELS; i++)
{
if (g_adc3_pinlist[i] != 0)
{
stm32_configgpio(g_adc3_pinlist[i]);
}
}
/* Call stm32_adcinitialize() to get an instance of the ADC interface */
adc = stm32h7_adc_initialize(3, g_adc3_chanlist, ADC3_NCHANNELS);
if (adc == NULL)
{
aerr("ERROR: Failed to get ADC3 interface\n");
return -ENODEV;
}
/* Register the ADC driver at "/dev/adc0 or 1" */
ret = adc_register(devname, adc);
if (ret < 0)
{
aerr("ERROR: adc_register(%s) failed: %d\n", devname, ret);
return ret;
}
#endif
#if defined(CONFIG_STM32H7_ADC1) || defined(CONFIG_STM32H7_ADC3)
/* Now we are initialized */
initialized = true;
}
return OK;
#else
return -ENOSYS;
#endif
}
#endif /* CONFIG_STM32H7_ADC1 || CONFIG_STM32H7_ADC2 || CONFIG_STM32H7_ADC3 */
#endif /* CONFIG_ADC */