124 lines
3.8 KiB
C
124 lines
3.8 KiB
C
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/*
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* Copyright (c) 2006-2022, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2019-04-20 tyustli the first version.
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*
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*/
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#include <rtthread.h>
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#ifdef BSP_USING_LPADC
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#if !defined(BSP_USING_LPADC1) && !defined(BSP_USING_LPADC2)
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#error "Please define at least one BSP_USING_LPADCx"
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#endif
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#if (defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
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#error "Please don't define 'FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL'!"
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#endif
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#define LOG_TAG "drv.lpadc"
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#include <drv_log.h>
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#include "drv_lpadc.h"
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#include "fsl_lpadc.h"
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#include <rtdevice.h>
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lpadc_config_t mLpadcConfigStruct;
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#if defined(BSP_USING_LPADC1)
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static struct rt_adc_device lpadc1_device;
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#endif
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#if defined(BSP_USING_LPADC2)
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static struct rt_adc_device lpadc2_device;
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#endif
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#if (defined(DEMO_LPADC_USE_HIGH_RESOLUTION) && DEMO_LPADC_USE_HIGH_RESOLUTION)
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uint32_t g_LpadcResultShift = 0U;
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#else
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uint32_t g_LpadcResultShift = 3U;
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#endif /* DEMO_LPADC_USE_HIGH_RESOLUTION */
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static rt_err_t imxrt_hp_adc_enabled(struct rt_adc_device *device, rt_uint32_t channel, rt_bool_t enabled)
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{
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return RT_EOK;
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}
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static rt_err_t imxrt_hp_adc_convert(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value)
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{
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LPADC1_BASE *base;
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lpadc_conv_command_config_t mLpadcCommandConfigStruct;
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lpadc_conv_trigger_config_t mLpadcTriggerConfigStruct;
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lpadc_conv_result_t mLpadcResultConfigStruct;
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base = (LPADC1_BASE *)(device->parent.user_data);
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//ADC_SetChannelConfig(base, 0, &adc_channel);
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LPADC_GetDefaultConvCommandConfig(&mLpadcCommandConfigStruct);
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mLpadcCommandConfigStruct.channelNumber = channel;
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#if defined(DEMO_LPADC_USE_HIGH_RESOLUTION) && DEMO_LPADC_USE_HIGH_RESOLUTION
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mLpadcCommandConfigStruct.conversionResolutionMode = kLPADC_ConversionResolutionHigh;
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#endif /* DEMO_LPADC_USE_HIGH_RESOLUTION */
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LPADC_SetConvCommandConfig(base, 1U, &mLpadcCommandConfigStruct);
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/* Set trigger configuration. */
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LPADC_GetDefaultConvTriggerConfig(&mLpadcTriggerConfigStruct);
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mLpadcTriggerConfigStruct.targetCommandId = 1U;
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mLpadcTriggerConfigStruct.enableHardwareTrigger = false;
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LPADC_SetConvTriggerConfig(base, 0U, &mLpadcTriggerConfigStruct); /* Configurate the trigger0. */
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LPADC_DoSoftwareTrigger(base, 1U);
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#if (defined(FSL_FEATURE_LPADC_FIFO_COUNT) && (FSL_FEATURE_LPADC_FIFO_COUNT == 2U))
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while (!LPADC_GetConvResult(base, &mLpadcResultConfigStruct, 0U))
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#else
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while (!LPADC_GetConvResult(base, &mLpadcResultConfigStruct))
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#endif /* FSL_FEATURE_LPADC_FIFO_COUNT */
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{
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}
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*value = (mLpadcResultConfigStruct.convValue) >> g_LpadcResultShift;
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return RT_EOK;
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}
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static struct rt_adc_ops imxrt_lpadc_ops =
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{
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.enabled = imxrt_hp_adc_enabled,
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.convert = imxrt_hp_adc_convert,
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};
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int rt_hw_adc_init(void)
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{
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int result = RT_EOK;
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LPADC_GetDefaultConfig(&mLpadcConfigStruct);
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mLpadcConfigStruct.enableAnalogPreliminary = true;
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#if defined(kLPADC_ReferenceVoltageAlt1)
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mLpadcConfigStruct.referenceVoltageSource = kLPADC_ReferenceVoltageAlt1;
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#endif /* DEMO_LPADC_VREF_SOURCE */
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#if defined(BSP_USING_LPADC1)
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LPADC_Init(LPADC1, &mLpadcConfigStruct);
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result = rt_hw_adc_register(&lpadc1_device, "lpadc1", &imxrt_lpadc_ops, LPADC1);
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if (result != RT_EOK)
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{
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LOG_E("register lpadc1 device failed error code = %d\n", result);
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}
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#endif
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#if defined(BSP_USING_LPADC2)
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LPADC_Init(LPADC1, &mLpadcConfigStruct);
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result = rt_hw_adc_register(&lpadc2_device, "lpadc2", &imxrt_lpadc_ops, LPADC2);
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if (result != RT_EOK)
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{
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LOG_E("register lpadc2 device failed error code = %d\n", result);
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}
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#endif
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return result;
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}
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INIT_DEVICE_EXPORT(rt_hw_adc_init);
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#endif /* BSP_USING_LPADC */
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