100 lines
1.9 KiB
C
100 lines
1.9 KiB
C
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/*
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* Copyright (c) 2006-2022, Synwit Technology Co.,Ltd.
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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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* 2022-02-10 lik first version
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*/
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#include "drv_dac.h"
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#ifdef BSP_USING_DAC
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//#define DRV_DEBUG
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#define LOG_TAG "drv.dac"
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#include <drv_log.h>
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static struct rt_dac_device swm_dac_device;
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static rt_err_t swm_dac_enabled(struct rt_dac_device *device, rt_uint32_t channel)
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{
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RT_ASSERT(device != RT_NULL);
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if (channel != 0)
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{
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LOG_E("dac channel must be 0.");
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return -RT_ERROR;
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}
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DAC_Open(DAC);
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return RT_EOK;
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}
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static rt_err_t swm_dac_disabled(struct rt_dac_device *device, rt_uint32_t channel)
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{
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RT_ASSERT(device != RT_NULL);
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if (channel != 0)
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{
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LOG_E("dac channel must be 0.");
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return -RT_ERROR;
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}
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DAC_Close(DAC);
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return RT_EOK;
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}
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static rt_err_t swm_dac_convert(struct rt_dac_device *device, rt_uint32_t channel, rt_uint32_t *value)
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{
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RT_ASSERT(device != RT_NULL);
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RT_ASSERT(value != RT_NULL);
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if (channel != 0)
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{
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LOG_E("dac channel must be 0.");
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return -RT_ERROR;
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}
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DAC->DHR = *value;
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while(DAC->SR & DAC_SR_DHRFULL_Msk) __NOP();
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return RT_EOK;
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}
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static const struct rt_dac_ops swm_dac_ops =
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{
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.disabled = swm_dac_disabled,
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.enabled = swm_dac_enabled,
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.convert = swm_dac_convert,
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};
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int swm_dac_init(void)
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{
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int result = RT_EOK;
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PORT_Init(PORTD, PIN2, PORTD_PIN2_DAC_OUT, 0);
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DAC_Init(DAC, DAC_FORMAT_LSB12B);
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SYS->DACCR &= ~SYS_DACCR_VRADJ_Msk;
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SYS->DACCR |= (17 << SYS_DACCR_VRADJ_Pos);
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/* register dac device */
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result = rt_hw_dac_register(&swm_dac_device, "dac", &swm_dac_ops, RT_NULL);
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if(result != RT_EOK)
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{
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LOG_E("dac register fail.");
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}
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else
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{
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LOG_D("dac register success.");
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}
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return result;
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}
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INIT_DEVICE_EXPORT(swm_dac_init);
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#endif /* BSP_USING_DAC */
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