| /* |
| * Copyright (c) 2023 SILA Embedded Solutions GmbH |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <stdint.h> |
| #include <zephyr/kernel.h> |
| #include <zephyr/drivers/gpio.h> |
| #include <zephyr/drivers/spi.h> |
| #include <zephyr/drivers/dac.h> |
| #include <zephyr/logging/log.h> |
| #include <zephyr/sys/byteorder.h> |
| |
| LOG_MODULE_REGISTER(dac_ad56xx, CONFIG_DAC_LOG_LEVEL); |
| |
| /* |
| * These values are actually all way less than 1us, but we can only |
| * wait with 1us precision. |
| * |
| * This should be checked when new types of this series are added to |
| * this implementation. |
| */ |
| #define DAC_AD56XX_MINIMUM_PULSE_WIDTH_LOW_IN_US 1 |
| #define DAC_AD56XX_PULSE_ACTIVATION_TIME_IN_US 1 |
| |
| enum ad56xx_command { |
| AD56XX_CMD_WRITE_UPDATE_CHANNEL = 3, |
| AD56XX_CMD_SOFTWARE_RESET = 6, |
| }; |
| |
| struct ad56xx_config { |
| struct spi_dt_spec bus; |
| const struct gpio_dt_spec gpio_reset; |
| uint8_t resolution; |
| |
| const uint8_t *channel_addresses; |
| size_t channel_count; |
| }; |
| |
| struct ad56xx_data { |
| }; |
| |
| static int ad56xx_write_command(const struct device *dev, enum ad56xx_command command, |
| uint8_t address, uint16_t value) |
| { |
| const struct ad56xx_config *config = dev->config; |
| uint8_t buffer_tx[3]; |
| uint8_t buffer_rx[ARRAY_SIZE(buffer_tx)]; |
| const struct spi_buf tx_buf[] = {{ |
| .buf = buffer_tx, |
| .len = ARRAY_SIZE(buffer_tx), |
| }}; |
| const struct spi_buf rx_buf[] = {{ |
| .buf = buffer_rx, |
| .len = ARRAY_SIZE(buffer_rx), |
| }}; |
| const struct spi_buf_set tx = { |
| .buffers = tx_buf, |
| .count = ARRAY_SIZE(tx_buf), |
| }; |
| const struct spi_buf_set rx = { |
| .buffers = rx_buf, |
| .count = ARRAY_SIZE(rx_buf), |
| }; |
| |
| buffer_tx[0] = (command << 4) | address; |
| value = value << (16 - config->resolution); |
| sys_put_be16(value, buffer_tx + 1); |
| |
| LOG_DBG("sending to DAC %s command 0x%02X, address 0x%02X and value 0x%04X", dev->name, |
| command, address, value); |
| int result = spi_transceive_dt(&config->bus, &tx, &rx); |
| |
| if (result != 0) { |
| LOG_ERR("spi_transceive failed with error %i", result); |
| return result; |
| } |
| |
| return 0; |
| } |
| |
| static int ad56xx_channel_setup(const struct device *dev, const struct dac_channel_cfg *channel_cfg) |
| { |
| const struct ad56xx_config *config = dev->config; |
| |
| if (channel_cfg->channel_id >= config->channel_count) { |
| LOG_ERR("invalid channel %i", channel_cfg->channel_id); |
| return -EINVAL; |
| } |
| |
| if (channel_cfg->resolution != config->resolution) { |
| LOG_ERR("invalid resolution %i", channel_cfg->resolution); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int ad56xx_write_value(const struct device *dev, uint8_t channel, uint32_t value) |
| { |
| const struct ad56xx_config *config = dev->config; |
| |
| if (value > BIT(config->resolution) - 1) { |
| LOG_ERR("invalid value %i", value); |
| return -EINVAL; |
| } |
| |
| if (channel > config->channel_count) { |
| LOG_ERR("invalid channel %i", channel); |
| return -EINVAL; |
| } |
| |
| return ad56xx_write_command(dev, AD56XX_CMD_WRITE_UPDATE_CHANNEL, |
| config->channel_addresses[channel], value); |
| } |
| |
| static int ad56xx_init(const struct device *dev) |
| { |
| const struct ad56xx_config *config = dev->config; |
| int result; |
| |
| if (!spi_is_ready_dt(&config->bus)) { |
| LOG_ERR("SPI bus %s not ready", config->bus.bus->name); |
| return -ENODEV; |
| } |
| |
| if (config->gpio_reset.port != NULL) { |
| LOG_DBG("reset %s with GPIO", dev->name); |
| result = gpio_pin_configure_dt(&config->gpio_reset, GPIO_OUTPUT_ACTIVE); |
| if (result != 0) { |
| LOG_ERR("failed to initialize GPIO for reset"); |
| return result; |
| } |
| |
| k_busy_wait(DAC_AD56XX_MINIMUM_PULSE_WIDTH_LOW_IN_US); |
| gpio_pin_set_dt(&config->gpio_reset, 0); |
| } else { |
| LOG_DBG("reset %s with command", dev->name); |
| result = ad56xx_write_command(dev, AD56XX_CMD_SOFTWARE_RESET, 0, 0); |
| if (result != 0) { |
| LOG_ERR("failed to send reset command"); |
| return result; |
| } |
| } |
| |
| /* |
| * The pulse activation time is actually defined to start together |
| * with the pulse start. To be on the safe side we add the wait time |
| * on top of the actual pulse. |
| */ |
| k_busy_wait(DAC_AD56XX_PULSE_ACTIVATION_TIME_IN_US); |
| |
| return 0; |
| } |
| |
| static const struct dac_driver_api ad56xx_driver_api = { |
| .channel_setup = ad56xx_channel_setup, |
| .write_value = ad56xx_write_value, |
| }; |
| |
| BUILD_ASSERT(CONFIG_DAC_AD56XX_INIT_PRIORITY > CONFIG_SPI_INIT_PRIORITY, |
| "CONFIG_DAC_AD56XX_INIT_PRIORITY must be higher than CONFIG_SPI_INIT_PRIORITY"); |
| |
| #define DAC_AD56XX_INST_DEFINE(index, name, res, channels, channels_count) \ |
| static struct ad56xx_data data_##name##_##index; \ |
| static const struct ad56xx_config config_##name##_##index = { \ |
| .bus = SPI_DT_SPEC_INST_GET( \ |
| index, SPI_OP_MODE_MASTER | SPI_MODE_CPHA | SPI_WORD_SET(8), 0), \ |
| .resolution = res, \ |
| .gpio_reset = GPIO_DT_SPEC_INST_GET_OR(index, reset_gpios, {0}), \ |
| .channel_addresses = channels, \ |
| .channel_count = channels_count, \ |
| }; \ |
| DEVICE_DT_INST_DEFINE(index, ad56xx_init, NULL, &data_##name##_##index, \ |
| &config_##name##_##index, POST_KERNEL, \ |
| CONFIG_DAC_AD56XX_INIT_PRIORITY, &ad56xx_driver_api); |
| |
| #define DT_DRV_COMPAT adi_ad5628 |
| #if DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT) |
| static const uint8_t ad5628_channels[] = { |
| 0, 1, 2, 3, 4, 5, 6, 7, |
| }; |
| #define DAC_AD5628_RESOLUTION 12 |
| #define DAC_AD5628_CHANNELS ad5628_channels |
| #define DAC_AD5628_CHANNEL_COUNT ARRAY_SIZE(ad5628_channels) |
| DT_INST_FOREACH_STATUS_OKAY_VARGS(DAC_AD56XX_INST_DEFINE, DT_DRV_COMPAT, DAC_AD5628_RESOLUTION, |
| DAC_AD5628_CHANNELS, DAC_AD5628_CHANNEL_COUNT) |
| #endif |
| #undef DT_DRV_COMPAT |
| |
| #define DT_DRV_COMPAT adi_ad5648 |
| #if DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT) |
| static const uint8_t ad5648_channels[] = { |
| 0, 1, 2, 3, 4, 5, 6, 7, |
| }; |
| #define DAC_AD5648_RESOLUTION 14 |
| #define DAC_AD5648_CHANNELS ad5648_channels |
| #define DAC_AD5648_CHANNEL_COUNT ARRAY_SIZE(ad5648_channels) |
| DT_INST_FOREACH_STATUS_OKAY_VARGS(DAC_AD56XX_INST_DEFINE, DT_DRV_COMPAT, DAC_AD5648_RESOLUTION, |
| DAC_AD5648_CHANNELS, DAC_AD5648_CHANNEL_COUNT) |
| #endif |
| #undef DT_DRV_COMPAT |
| |
| #define DT_DRV_COMPAT adi_ad5668 |
| #if DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT) |
| static const uint8_t ad5668_channels[] = { |
| 0, 1, 2, 3, 4, 5, 6, 7, |
| }; |
| #define DAC_AD5668_RESOLUTION 16 |
| #define DAC_AD5668_CHANNELS ad5668_channels |
| #define DAC_AD5668_CHANNEL_COUNT ARRAY_SIZE(ad5668_channels) |
| DT_INST_FOREACH_STATUS_OKAY_VARGS(DAC_AD56XX_INST_DEFINE, DT_DRV_COMPAT, DAC_AD5668_RESOLUTION, |
| DAC_AD5668_CHANNELS, DAC_AD5668_CHANNEL_COUNT) |
| #endif |
| #undef DT_DRV_COMPAT |
| |
| #define DT_DRV_COMPAT adi_ad5672 |
| #if DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT) |
| static const uint8_t ad5672_channels[] = { |
| 0, 1, 2, 3, 4, 5, 6, 7, |
| }; |
| #define DAC_AD5672_RESOLUTION 12 |
| #define DAC_AD5672_CHANNELS ad5672_channels |
| #define DAC_AD5672_CHANNEL_COUNT ARRAY_SIZE(ad5672_channels) |
| DT_INST_FOREACH_STATUS_OKAY_VARGS(DAC_AD56XX_INST_DEFINE, DT_DRV_COMPAT, DAC_AD5672_RESOLUTION, |
| DAC_AD5672_CHANNELS, DAC_AD5672_CHANNEL_COUNT) |
| #endif |
| #undef DT_DRV_COMPAT |
| |
| #define DT_DRV_COMPAT adi_ad5674 |
| #if DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT) |
| static const uint8_t ad5674_channels[] = { |
| 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, |
| }; |
| #define DAC_AD5674_RESOLUTION 12 |
| #define DAC_AD5674_CHANNELS ad5674_channels |
| #define DAC_AD5674_CHANNEL_COUNT ARRAY_SIZE(ad5674_channels) |
| DT_INST_FOREACH_STATUS_OKAY_VARGS(DAC_AD56XX_INST_DEFINE, DT_DRV_COMPAT, DAC_AD5674_RESOLUTION, |
| DAC_AD5674_CHANNELS, DAC_AD5674_CHANNEL_COUNT) |
| #endif |
| #undef DT_DRV_COMPAT |
| |
| #define DT_DRV_COMPAT adi_ad5676 |
| #if DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT) |
| static const uint8_t ad5676_channels[] = { |
| 0, 1, 2, 3, 4, 5, 6, 7, |
| }; |
| #define DAC_AD5676_RESOLUTION 16 |
| #define DAC_AD5676_CHANNELS ad5676_channels |
| #define DAC_AD5676_CHANNEL_COUNT ARRAY_SIZE(ad5676_channels) |
| DT_INST_FOREACH_STATUS_OKAY_VARGS(DAC_AD56XX_INST_DEFINE, DT_DRV_COMPAT, DAC_AD5676_RESOLUTION, |
| DAC_AD5676_CHANNELS, DAC_AD5676_CHANNEL_COUNT) |
| #endif |
| #undef DT_DRV_COMPAT |
| |
| #define DT_DRV_COMPAT adi_ad5679 |
| #if DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT) |
| static const uint8_t ad5679_channels[] = { |
| 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, |
| }; |
| #define DAC_AD5679_RESOLUTION 16 |
| #define DAC_AD5679_CHANNELS ad5679_channels |
| #define DAC_AD5679_CHANNEL_COUNT ARRAY_SIZE(ad5679_channels) |
| DT_INST_FOREACH_STATUS_OKAY_VARGS(DAC_AD56XX_INST_DEFINE, DT_DRV_COMPAT, DAC_AD5679_RESOLUTION, |
| DAC_AD5679_CHANNELS, DAC_AD5679_CHANNEL_COUNT) |
| #endif |
| #undef DT_DRV_COMPAT |
| |
| #define DT_DRV_COMPAT adi_ad5684 |
| #if DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT) |
| static const uint8_t ad5684_channels[] = { |
| 1, |
| 2, |
| 4, |
| 8, |
| }; |
| #define DAC_AD5684_RESOLUTION 12 |
| #define DAC_AD5684_CHANNELS ad5684_channels |
| #define DAC_AD5684_CHANNEL_COUNT ARRAY_SIZE(ad5684_channels) |
| DT_INST_FOREACH_STATUS_OKAY_VARGS(DAC_AD56XX_INST_DEFINE, DT_DRV_COMPAT, DAC_AD5684_RESOLUTION, |
| DAC_AD5684_CHANNELS, DAC_AD5684_CHANNEL_COUNT) |
| #endif |
| #undef DT_DRV_COMPAT |
| |
| #define DT_DRV_COMPAT adi_ad5686 |
| #if DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT) |
| static const uint8_t ad5686_channels[] = { |
| 1, |
| 2, |
| 4, |
| 8, |
| }; |
| #define DAC_AD5686_RESOLUTION 16 |
| #define DAC_AD5686_CHANNELS ad5686_channels |
| #define DAC_AD5686_CHANNEL_COUNT ARRAY_SIZE(ad5686_channels) |
| DT_INST_FOREACH_STATUS_OKAY_VARGS(DAC_AD56XX_INST_DEFINE, DT_DRV_COMPAT, DAC_AD5686_RESOLUTION, |
| DAC_AD5686_CHANNELS, DAC_AD5686_CHANNEL_COUNT) |
| #endif |
| #undef DT_DRV_COMPAT |
| |
| #define DT_DRV_COMPAT adi_ad5687 |
| #if DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT) |
| static const uint8_t ad5687_channels[] = { |
| 1, |
| 8, |
| }; |
| #define DAC_AD5687_RESOLUTION 12 |
| #define DAC_AD5687_CHANNELS ad5687_channels |
| #define DAC_AD5687_CHANNEL_COUNT ARRAY_SIZE(ad5687_channels) |
| DT_INST_FOREACH_STATUS_OKAY_VARGS(DAC_AD56XX_INST_DEFINE, DT_DRV_COMPAT, DAC_AD5687_RESOLUTION, |
| DAC_AD5687_CHANNELS, DAC_AD5687_CHANNEL_COUNT) |
| #endif |
| #undef DT_DRV_COMPAT |
| |
| #define DT_DRV_COMPAT adi_ad5689 |
| #if DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT) |
| static const uint8_t ad5689_channels[] = { |
| 1, |
| 8, |
| }; |
| #define DAC_AD5689_RESOLUTION 16 |
| #define DAC_AD5689_CHANNELS ad5689_channels |
| #define DAC_AD5689_CHANNEL_COUNT ARRAY_SIZE(ad5689_channels) |
| DT_INST_FOREACH_STATUS_OKAY_VARGS(DAC_AD56XX_INST_DEFINE, DT_DRV_COMPAT, DAC_AD5689_RESOLUTION, |
| DAC_AD5689_CHANNELS, DAC_AD5689_CHANNEL_COUNT) |
| #endif |
| #undef DT_DRV_COMPAT |