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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_dac.c
* @author Nations
* @version v1.0.0
*
* @copyright Copyright (c) 2019, Nations Technologies Inc. All rights reserved.
*/
#include <rtdbg.h>
#include "drv_dac.h"
#include "board.h"
#ifdef RT_USING_DAC
#if defined(BSP_USING_DAC1) || defined(BSP_USING_DAC2)
/* this driver can be disabled at menuconfig -> Hardware Drivers Config -> On-chip Peripheral Drivers -> Enable DAC */
static struct n32_dac_config dac_config[] =
{
#ifdef BSP_USING_DAC1
{
"dac1",
DAC_CHANNEL_1,
},
#endif
#ifdef BSP_USING_DAC2
{
"dac2",
DAC_CHANNEL_2,
},
#endif
};
static struct n32_dac dac_obj[sizeof(dac_config) / sizeof(dac_config[0])];
static void n32_dac_init(struct n32_dac_config *config)
{
DAC_InitType DAC_InitStructure;
/* DAC Periph clock enable */
RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_DAC, ENABLE);
/* DAC channel Configuration */
DAC_InitStructure.Trigger = DAC_TRG_SOFTWARE;
DAC_InitStructure.WaveGen = DAC_WAVEGEN_NOISE;
DAC_InitStructure.LfsrUnMaskTriAmp = DAC_UNMASK_LFSRBIT0;
DAC_InitStructure.BufferOutput = DAC_BUFFOUTPUT_ENABLE;
DAC_Init(config->dac_periph, &DAC_InitStructure);
}
static rt_err_t n32_dac_enabled(struct rt_dac_device *device, rt_uint32_t channel)
{
RT_ASSERT(device != RT_NULL);
DAC_Enable(channel, ENABLE);
return RT_EOK;
}
static rt_err_t n32_dac_disabled(struct rt_dac_device *device, rt_uint32_t channel)
{
RT_ASSERT(device != RT_NULL);
DAC_Enable(channel, DISABLE);
return RT_EOK;
}
static rt_err_t n32_set_dac_value(struct rt_dac_device *device, rt_uint32_t channel, rt_uint32_t *value)
{
RT_ASSERT(device != RT_NULL);
rt_uint16_t set_value = 0;
set_value = (rt_uint16_t)*value;
if(set_value > 4096)
{
set_value = 4096;
}
/* Start DAC Channel conversion by software */
if(channel == DAC_CHANNEL_1)
{
DAC_SetCh1Data(DAC_ALIGN_R_12BIT, set_value);
DAC_SoftTrgEnable(DAC_CHANNEL_1, ENABLE);
}
else
{
DAC_SetCh2Data(DAC_ALIGN_R_12BIT, set_value);
DAC_SoftTrgEnable(DAC_CHANNEL_2, ENABLE);
}
return RT_EOK;
}
static const struct rt_dac_ops n32_dac_ops =
{
.disabled = n32_dac_disabled,
.enabled = n32_dac_enabled,
.convert = n32_set_dac_value,
};
int rt_hw_dac_init(void)
{
int result = RT_EOK;
/* save dac name */
char name_buf[5] = {'d', 'a', 'c', '0', 0};
int i = 0;
for (i = 0; i < sizeof(dac_config) / sizeof(dac_config[0]); i++)
{
/* dac init */
name_buf[3] = '0';
dac_obj[i].config = &dac_config[i];
#if defined(BSP_USING_DAC1)
if (dac_obj[i].config->dac_periph == DAC_CHANNEL_1)
{
name_buf[3] = '1';
}
GPIOInit(GPIOA, GPIO_Mode_AIN, GPIO_Speed_50MHz, GPIO_PIN_4);
#endif
#if defined(BSP_USING_DAC2)
if (dac_obj[i].config->dac_periph == DAC_CHANNEL_2)
{
name_buf[3] = '2';
}
GPIOInit(GPIOA, GPIO_Mode_AIN, GPIO_Speed_50MHz, GPIO_PIN_5);
#endif
/* register dac device */
for (i = 0; i < sizeof(dac_obj) / sizeof(dac_obj[0]); i++)
{
n32_dac_init(&dac_config[i]);
if (rt_hw_dac_register(&dac_obj[i].dac_device, name_buf, &n32_dac_ops, &dac_obj[i].config->dac_periph) == RT_EOK)
{
LOG_D("%s init success", name_buf);
}
else
{
LOG_E("%s register failed", name_buf);
result = -RT_ERROR;
}
}
}
return result;
}
INIT_DEVICE_EXPORT(rt_hw_dac_init);
#endif /* defined(BSP_USING_DAC1) || defined(BSP_USING_DAC2) */
#endif /* RT_USING_DAC */
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