GY-63_MS5611/libraries/DAC8550

DAC8550 - experimental

Arduino library for DAC8550 SPI Digital Analog Convertor.

Description

The DAC8550 is a SPI based 16 bit DAC with one channel.

WARNING this library is not tested with real hardware yet. It is derived from the DAC8551 library.

Interface

Core

• DAC8550(uint8_t slaveSelect) Constructor for hardware SPI, the slaveSelect pin needs to be defined.
• DAC8550(uint8_t spiData, uint8_t spiClock, uint8_t slaveSelect) Constructor for the software SPI.
• 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.

Hardware SPI

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.

ESP32 specific

• void selectHSPI() in case hardware SPI, the ESP32 has two options HSPI and VSPI.
• void selectVSPI() see above.
• bool usesHSPI() returns true if HSPI is used.
• bool usesVSPI() returns true if VSPI is used.

The selectVSPI() or the selectHSPI() needs to be called BEFORE the begin() function.

experimental

• void setGPIOpins(uint8_t clk, uint8_t miso, uint8_t mosi, uint8_t select) overrule GPIO pins of ESP32 for hardware SPI. needs to be called AFTER the begin() function.

Power down

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
DAC8550_POWERDOWN_NORMAL	0
DAC8550_POWERDOWN_1K	1
DAC8550_POWERDOWN_100K	2
DAC8550_POWERDOWN_HIGH_IMP	3

Operation

See examples

Future

• testing with real hardware
• improve documentation
• improve code incl readability
  • spiData => spiDataOut