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/*****************************************************************************
* Copyright (c) 2019, Nations Technologies Inc.
*
* All rights reserved.
* ****************************************************************************
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Nations' name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY NATIONS "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* DISCLAIMED. IN NO EVENT SHALL NATIONS 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.
* ****************************************************************************/
/**
* @file drv_adc.c
* @author Nations
* @version v1.0.0
*
* @copyright Copyright (c) 2019, Nations Technologies Inc. All rights reserved.
*/
#include "board.h"
#include "drv_adc.h"
#ifdef RT_USING_ADC
#if defined(BSP_USING_ADC1) || defined(BSP_USING_ADC2) || defined(BSP_USING_ADC3) || defined(BSP_USING_ADC4)
/* this driver can be disabled at menuconfig -> Hardware Drivers Config -> On-chip Peripheral Drivers -> Enable ADC */
static struct n32_adc_config adc_config[] =
{
#ifdef BSP_USING_ADC1
{
"adc1",
ADC1,
},
#endif
#ifdef BSP_USING_ADC2
{
"adc2",
ADC2,
},
#endif
#ifdef BSP_USING_ADC3
{
"adc3",
ADC3,
},
#endif
#ifdef BSP_USING_ADC4
{
"adc4",
ADC4,
},
#endif
};
static struct n32_adc adc_obj[sizeof(adc_config) / sizeof(adc_config[0])] = {0};
static void n32_adc_init(struct n32_adc_config *config)
{
ADC_InitType ADC_InitStructure;
/* ADC configuration ------------------------------------------------------*/
ADC_InitStructure.WorkMode = ADC_WORKMODE_INDEPENDENT;
ADC_InitStructure.MultiChEn = DISABLE;
ADC_InitStructure.ContinueConvEn = DISABLE;
ADC_InitStructure.ExtTrigSelect = ADC_EXT_TRIGCONV_NONE;
ADC_InitStructure.DatAlign = ADC_DAT_ALIGN_R;
ADC_InitStructure.ChsNumber = 1;
ADC_Init((ADC_Module*)config->adc_periph, &ADC_InitStructure);
/* Enable ADC */
ADC_Enable((ADC_Module*)config->adc_periph, ENABLE);
/* Check ADC Ready */
while(ADC_GetFlagStatusNew((ADC_Module*)config->adc_periph, ADC_FLAG_RDY) == RESET)
;
/* Start ADC calibration */
ADC_StartCalibration((ADC_Module*)config->adc_periph);
/* Check the end of ADC calibration */
while (ADC_GetCalibrationStatus((ADC_Module*)config->adc_periph))
;
}
static rt_err_t n32_adc_enabled(struct rt_adc_device *device, rt_uint32_t channel, rt_bool_t enabled)
{
if (channel > ADC_CH_18)
{
return RT_EINVAL;
}
return RT_EOK;
}
static rt_err_t n32_adc_convert(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value)
{
struct n32_adc_config *config;
RT_ASSERT(device != RT_NULL);
if (channel > ADC_CH_18)
{
return RT_EINVAL;
}
config = (struct n32_adc_config *)(device->parent.user_data);
ADC_ConfigRegularChannel((ADC_Module*)config->adc_periph, channel, 1, ADC_SAMP_TIME_239CYCLES5);
/* Start ADC Software Conversion */
ADC_EnableSoftwareStartConv((ADC_Module*)config->adc_periph, ENABLE);
while(ADC_GetFlagStatus((ADC_Module*)config->adc_periph, ADC_FLAG_ENDC)==0)
{
}
ADC_ClearFlag((ADC_Module*)config->adc_periph, ADC_FLAG_ENDC);
ADC_ClearFlag((ADC_Module*)config->adc_periph, ADC_FLAG_STR);
*value=ADC_GetDat((ADC_Module*)config->adc_periph);
return RT_EOK;
}
static struct rt_adc_ops n32_adc_ops =
{
.enabled = n32_adc_enabled,
.convert = n32_adc_convert,
};
int rt_hw_adc_init(void)
{
int i = 0;
int result = RT_EOK;
#if defined(BSP_USING_ADC1)
RCC_EnableAHBPeriphClk(RCC_AHB_PERIPH_ADC1, ENABLE);
/* Configure PC.00 PC.01 as analog input -------------------------*/
GPIOInit(GPIOC, GPIO_Mode_AIN, GPIO_Speed_50MHz, GPIO_PIN_0 | GPIO_PIN_1);
#endif /* BSP_USING_ADC1 */
#if defined(BSP_USING_ADC2)
RCC_EnableAHBPeriphClk(RCC_AHB_PERIPH_ADC2, ENABLE);
/* Configure PC.02 PC.03 as analog input -------------------------*/
GPIOInit(GPIOC, GPIO_Mode_AIN, GPIO_Speed_50MHz, GPIO_PIN_2 | GPIO_PIN_3);
#endif /* BSP_USING_ADC2 */
#if defined(BSP_USING_ADC3)
RCC_EnableAHBPeriphClk(RCC_AHB_PERIPH_ADC3, ENABLE);
/* Configure PD.10 PD.11 as analog input -------------------------*/
GPIOInit(GPIOD, GPIO_Mode_AIN, GPIO_Speed_50MHz, GPIO_PIN_10 | GPIO_PIN_11);
#endif /* BSP_USING_ADC3 */
#if defined(BSP_USING_ADC4)
RCC_EnableAHBPeriphClk(RCC_AHB_PERIPH_ADC4, ENABLE);
/* Configure PD.12 PD.13 as analog input -------------------------*/
GPIOInit(GPIOD, GPIO_Mode_AIN, GPIO_Speed_50MHz, GPIO_PIN_12 | GPIO_PIN_13);
#endif /* BSP_USING_ADC4 */
/* RCC_ADCHCLK_DIV16*/
ADC_ConfigClk(ADC_CTRL3_CKMOD_AHB, RCC_ADCHCLK_DIV16);
for (i = 0; i < sizeof(adc_obj) / sizeof(adc_obj[0]); i++)
{
adc_obj[i].config = &adc_config[i];
n32_adc_init(&adc_config[i]);
rt_hw_adc_register(&adc_obj[i].adc_device, \
adc_obj[i].config->name, &n32_adc_ops, adc_obj[i].config);
}
return result;
}
INIT_DEVICE_EXPORT(rt_hw_adc_init);
#endif /* defined(BSP_USING_ADC1) || defined(BSP_USING_ADC2) || defined(BSP_USING_ADC3) || defined(BSP_USING_ADC4) */
#endif /* RT_USING_ADC */
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