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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-04-20 tyustli the first version.
*
*/
#include <rtthread.h>
#ifdef BSP_USING_LPADC
#if !defined(BSP_USING_LPADC1) && !defined(BSP_USING_LPADC2)
#error "Please define at least one BSP_USING_LPADCx"
#endif
#if (defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
#error "Please don't define 'FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL'!"
#endif
#define LOG_TAG "drv.lpadc"
#include <drv_log.h>
#include "drv_lpadc.h"
#include "fsl_lpadc.h"
#include <rtdevice.h>
lpadc_config_t mLpadcConfigStruct;
#if defined(BSP_USING_LPADC1)
static struct rt_adc_device lpadc1_device;
#endif
#if defined(BSP_USING_LPADC2)
static struct rt_adc_device lpadc2_device;
#endif
#if (defined(DEMO_LPADC_USE_HIGH_RESOLUTION) && DEMO_LPADC_USE_HIGH_RESOLUTION)
uint32_t g_LpadcResultShift = 0U;
#else
uint32_t g_LpadcResultShift = 3U;
#endif /* DEMO_LPADC_USE_HIGH_RESOLUTION */
static rt_err_t imxrt_hp_adc_enabled(struct rt_adc_device *device, rt_uint32_t channel, rt_bool_t enabled)
{
return RT_EOK;
}
static rt_err_t imxrt_hp_adc_convert(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value)
{
LPADC1_BASE *base;
lpadc_conv_command_config_t mLpadcCommandConfigStruct;
lpadc_conv_trigger_config_t mLpadcTriggerConfigStruct;
lpadc_conv_result_t mLpadcResultConfigStruct;
base = (LPADC1_BASE *)(device->parent.user_data);
//ADC_SetChannelConfig(base, 0, &adc_channel);
LPADC_GetDefaultConvCommandConfig(&mLpadcCommandConfigStruct);
mLpadcCommandConfigStruct.channelNumber = channel;
#if defined(DEMO_LPADC_USE_HIGH_RESOLUTION) && DEMO_LPADC_USE_HIGH_RESOLUTION
mLpadcCommandConfigStruct.conversionResolutionMode = kLPADC_ConversionResolutionHigh;
#endif /* DEMO_LPADC_USE_HIGH_RESOLUTION */
LPADC_SetConvCommandConfig(base, 1U, &mLpadcCommandConfigStruct);
/* Set trigger configuration. */
LPADC_GetDefaultConvTriggerConfig(&mLpadcTriggerConfigStruct);
mLpadcTriggerConfigStruct.targetCommandId = 1U;
mLpadcTriggerConfigStruct.enableHardwareTrigger = false;
LPADC_SetConvTriggerConfig(base, 0U, &mLpadcTriggerConfigStruct); /* Configurate the trigger0. */
LPADC_DoSoftwareTrigger(base, 1U);
#if (defined(FSL_FEATURE_LPADC_FIFO_COUNT) && (FSL_FEATURE_LPADC_FIFO_COUNT == 2U))
while (!LPADC_GetConvResult(base, &mLpadcResultConfigStruct, 0U))
#else
while (!LPADC_GetConvResult(base, &mLpadcResultConfigStruct))
#endif /* FSL_FEATURE_LPADC_FIFO_COUNT */
{
}
*value = (mLpadcResultConfigStruct.convValue) >> g_LpadcResultShift;
return RT_EOK;
}
static struct rt_adc_ops imxrt_lpadc_ops =
{
.enabled = imxrt_hp_adc_enabled,
.convert = imxrt_hp_adc_convert,
};
int rt_hw_adc_init(void)
{
int result = RT_EOK;
LPADC_GetDefaultConfig(&mLpadcConfigStruct);
mLpadcConfigStruct.enableAnalogPreliminary = true;
#if defined(kLPADC_ReferenceVoltageAlt1)
mLpadcConfigStruct.referenceVoltageSource = kLPADC_ReferenceVoltageAlt1;
#endif /* DEMO_LPADC_VREF_SOURCE */
#if defined(BSP_USING_LPADC1)
LPADC_Init(LPADC1, &mLpadcConfigStruct);
result = rt_hw_adc_register(&lpadc1_device, "lpadc1", &imxrt_lpadc_ops, LPADC1);
if (result != RT_EOK)
{
LOG_E("register lpadc1 device failed error code = %d\n", result);
}
#endif
#if defined(BSP_USING_LPADC2)
LPADC_Init(LPADC1, &mLpadcConfigStruct);
result = rt_hw_adc_register(&lpadc2_device, "lpadc2", &imxrt_lpadc_ops, LPADC2);
if (result != RT_EOK)
{
LOG_E("register lpadc2 device failed error code = %d\n", result);
}
#endif
return result;
}
INIT_DEVICE_EXPORT(rt_hw_adc_init);
#endif /* BSP_USING_LPADC */
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