Implementation of AD7780 Driver. More...
Functions | |
| int8_t | ad7780_init (struct ad7780_dev **device, struct ad7780_init_param init_param) |
| Initializes the communication peripheral and the initial Values for AD7780 Board and checks if the device is present. More... | |
| int32_t | ad7780_remove (struct ad7780_dev *dev) |
| Free the resources allocated by ad7780_init(). More... | |
| int8_t | ad7780_wait_rdy_go_low (struct ad7780_dev *dev) |
| Waits for DOUT/RDY pin to go low. More... | |
| int32_t | ad7780_read_sample (struct ad7780_dev *dev, uint8_t *p_status) |
| Reads a 24-bit sample from the ADC. More... | |
| float | ad7780_convert_to_voltage (uint32_t raw_sample, float v_ref, uint8_t gain) |
| Converts the 24-bit raw value to milivolts. More... | |
Detailed Description
Implementation of AD7780 Driver.
Copyright 2012(c) Analog Devices, Inc.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
- Neither the name of Analog Devices, Inc. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES, INC. “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANALOG DEVICES, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Function Documentation
◆ ad7780_convert_to_voltage()
| float ad7780_convert_to_voltage | ( | uint32_t | raw_sample, |
| float | v_ref, | ||
| uint8_t | gain | ||
| ) |
Converts the 24-bit raw value to milivolts.
- Parameters
-
raw_sample - 24-bit raw sample(offset binary). v_ref - The reference voltage. gain - The gain. Accepted values: 1, 128.
- Returns
- voltage - The voltage obtained from the raw value.
◆ ad7780_init()
| int8_t ad7780_init | ( | struct ad7780_dev ** | device, |
| struct ad7780_init_param | init_param | ||
| ) |
Initializes the communication peripheral and the initial Values for AD7780 Board and checks if the device is present.
- Parameters
-
device - The device structure. init_param - The structure that contains the device initial parameters.
- Returns
- ret - The result of the initialization procedure. Example: -1 - SPI peripheral was not initialized or the device is not present. 0 - SPI peripheral was initialized and the device is present.
◆ ad7780_read_sample()
| int32_t ad7780_read_sample | ( | struct ad7780_dev * | dev, |
| uint8_t * | p_status | ||
| ) |
Reads a 24-bit sample from the ADC.
- Parameters
-
dev - The device structure. p_status - Stores the 8-bit status that is read for every conversion.
- Returns
- convSample - The 24-bit sample.
◆ ad7780_remove()
| int32_t ad7780_remove | ( | struct ad7780_dev * | dev | ) |
Free the resources allocated by ad7780_init().
- Parameters
-
dev - The device structure.
- Returns
- 0 in case of success, negative error code otherwise.
◆ ad7780_wait_rdy_go_low()
| int8_t ad7780_wait_rdy_go_low | ( | struct ad7780_dev * | dev | ) |
Waits for DOUT/RDY pin to go low.
- Parameters
-
dev - The device structure.
- Returns
- The result of the operation. Example: -1 - DOUT/RDY pin is high. 0 - DOUT/RDY pin is low.
