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110 lines
2.6 KiB
110 lines
2.6 KiB
/* |
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* Copyright (c) 2020 Henrik Brix Andersen <henrik@brixandersen.dk> |
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* Copyright (c) 2023, NXP |
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* Copyright (c) 2025 PHYTEC America LLC |
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* |
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* SPDX-License-Identifier: Apache-2.0 |
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*/ |
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#define DT_DRV_COMPAT nxp_dac12 |
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#include <zephyr/kernel.h> |
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#include <zephyr/drivers/dac.h> |
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#include <zephyr/logging/log.h> |
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#include <fsl_dac12.h> |
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LOG_MODULE_REGISTER(dac_mcux_dac12, CONFIG_DAC_LOG_LEVEL); |
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struct mcux_dac12_config { |
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DAC_Type *base; |
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dac12_reference_voltage_source_t reference; |
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bool buffered; |
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}; |
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struct mcux_dac12_data { |
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bool configured; |
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}; |
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static int mcux_dac12_channel_setup(const struct device *dev, |
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const struct dac_channel_cfg *channel_cfg) |
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{ |
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const struct mcux_dac12_config *config = dev->config; |
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struct mcux_dac12_data *data = dev->data; |
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dac12_config_t dac12_config; |
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if (channel_cfg->channel_id != 0) { |
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LOG_ERR("unsupported channel %d", channel_cfg->channel_id); |
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return -ENOTSUP; |
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} |
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if (channel_cfg->resolution != 12) { |
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LOG_ERR("unsupported resolution %d", channel_cfg->resolution); |
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return -ENOTSUP; |
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} |
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if (channel_cfg->internal) { |
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LOG_ERR("Internal channels not supported"); |
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return -ENOTSUP; |
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} |
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DAC12_GetDefaultConfig(&dac12_config); |
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dac12_config.referenceVoltageSource = config->reference; |
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DAC12_Init(config->base, &dac12_config); |
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DAC12_Enable(config->base, true); |
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data->configured = true; |
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return 0; |
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} |
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static int mcux_dac12_write_value(const struct device *dev, uint8_t channel, uint32_t value) |
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{ |
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const struct mcux_dac12_config *config = dev->config; |
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struct mcux_dac12_data *data = dev->data; |
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if (!data->configured) { |
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LOG_ERR("channel not initialized"); |
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return -EINVAL; |
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} |
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if (channel != 0) { |
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LOG_ERR("unsupported channel %d", channel); |
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return -ENOTSUP; |
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} |
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if (value >= 4096) { |
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LOG_ERR("value %d out of range", value); |
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return -EINVAL; |
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} |
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DAC12_SetData(config->base, value); |
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return 0; |
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} |
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static DEVICE_API(dac, mcux_dac12_driver_api) = { |
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.channel_setup = mcux_dac12_channel_setup, |
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.write_value = mcux_dac12_write_value, |
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}; |
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#define TO_DAC12_VREF_SRC(val) _DO_CONCAT(kDAC12_ReferenceVoltageSourceAlt, val) |
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#define MCUX_DAC12_INIT(n) \ |
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static struct mcux_dac12_data mcux_dac12_data_##n; \ |
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\ |
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static const struct mcux_dac12_config mcux_dac12_config_##n = { \ |
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.base = (DAC_Type *)DT_INST_REG_ADDR(n), \ |
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.reference = \ |
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TO_DAC12_VREF_SRC(DT_INST_PROP(n, voltage_reference)), \ |
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.buffered = DT_INST_PROP(n, buffered), \ |
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}; \ |
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\ |
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DEVICE_DT_INST_DEFINE(n, NULL, NULL, \ |
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&mcux_dac12_data_##n, \ |
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&mcux_dac12_config_##n, \ |
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POST_KERNEL, CONFIG_DAC_INIT_PRIORITY, \ |
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&mcux_dac12_driver_api); |
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DT_INST_FOREACH_STATUS_OKAY(MCUX_DAC12_INIT)
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