Arduino library for DAC8501 DAC8531, DAC8550, DAC8551 SPI Digital Analog Convertor.
The DAC8551 is a SPI based 16 bit DAC with one channel.
The DAC8501, DAC8531 and DAC8550 are drop in compatible. They all have classes derived 1 to 1 from DAC8551.
Warning this library is not tested extensively.
- Fix #19, improve handling SPI dependency.
- update examples
The version 0.3.0 has breaking changes in the interface. The essence is removal of ESP32 specific code from the library. This makes it possible to support the ESP32-S3 and other processors in the future. Also it makes the library a bit simpler to maintain.
Note order of parameters changed.
- https://github.com/RobTillaart/DAC8550
- https://github.com/RobTillaart/DAC8551
- https://github.com/RobTillaart/DAC8552
- https://github.com/RobTillaart/DAC8554
- https://github.com/RobTillaart/MCP_DAC
- https://github.com/RobTillaart/AD5680 (18 bit DAC)
#include "DAC8551.h"- DAC8551(uint8_t select, SPIClassRP2040 * spi = &SPI) Constructor HW SPI RP2040.
- DAC8551(uint8_t select, SPIClass * spi = &SPI) Constructor HW SPI other.
- DAC8551(uint8_t select, uint8_t spiData, uint8_t spiClock) Constructor SW SPI.
- DAC8501(...) idem constructors for DAC8501.
- DAC8531(...) idem constructors for DAC8531.
- DAC8550(...) idem constructors for DAC8550.
- DAC8551(...) idem constructors for DAC8551.
- void begin() initializes all pins to default state
- void setValue(uint16_t value) set the value of the channel to 0 - 65535
- uint16_t getValue() returns the last value written.
To be used only if one needs a specific speed.
- void setSPIspeed(uint32_t speed) set SPI transfer rate.
- uint32_t getSPIspeed() returns SPI transfer rate.
- bool usesHWSPI() returns true if HW SPI is used.
check datasheet for details.
- void setPowerDown(uint8_t powerDownMode) sets power down mode. 0 - 3.
- uint8_t getPowerDownMode() returns last written mode.
| Power down mode | Value |
|---|---|
| DAC8551_POWERDOWN_NORMAL | 0 |
| DAC8551_POWERDOWN_1K | 1 |
| DAC8551_POWERDOWN_100K | 2 |
| DAC8551_POWERDOWN_HIGH_IMP | 3 |
Note: DAC8501, DAC8531 and DAC8550 uses the same constants.
See examples
demo_hw_spi.ino
- write a sawtooth to channel A followed by a sinus
- uses HW SPI
demo_sw_spi.ino
- write a sawtooth to channel A followed by a sinus
- uses SW SPI
demo_powerdown.ino
- idem
- improve documentation
- testing (DAC8531 is verified, see example)
- verify replacement chips
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