GY-63_MS5611/libraries/DAC8554

DAC8551

Arduino library for DAC8554 SPI Digital Analog Convertor

Description

The DAC8554 is a SPI based 16 bit DAC with four channels.

Warning the library is not tested extensively.

Interface

Core

• DAC8554(uint8_t slaveSelect, uint8_t address = 0) Constructor for hardware SPI, since 0.2.0 the slaveSelect pin needs to be defined.
• DAC8554(uint8_t spiData, uint8_t spiClock, uint8_t slaveSelect, uint8_t address = 0) Constructor for the software SPI
• void begin() initializes all pins to default state
• void setValue(uint8_t channel, uint16_t value) set the value of the channel to 0 - 65535
• void setSingleValue(uint8_t channel, uint16_t value) writes the value to the channel but does not affect buffered ones. TODO - elaborate.
• uint16_t getValue(uint8_t channel) returns the last value written.

Power down

check datasheet for details.

• void setPowerDown(uint8_t powerDownMode) sets power down mode. 0 - 3.
• uint8_t getPowerDownMode() returns last written mode.
• void setSinglePowerDown(uint8_t channel, uint8_t powerDownMode) does not affect other channels.

Power down mode	Value
DAC8554_POWERDOWN_NORMAL	0x00
DAC8554_POWERDOWN_1K	0x40
DAC8554_POWERDOWN_100K	0x80
DAC8554_POWERDOWN_HIGH_IMP	0xC0

Broadcast

• void bufferValue(uint8_t channel, uint16_t value) prepare a new value for a channel.
• void broadcastBuffer() write all buffers to all(up to 4) 8554's channel's
• void broadcastValue(uint16_t value) write value to all(up to 4) 8554's channel's
• void broadcastPowerDown(uint8_t powerDownMode) write powerDownMode to all 8554's channel's

Operation

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_same_time_write.ino

• writes two square waves that trigger at the same time

demo_sequential_write.ino

• writes two square waves sequentially (slight time difference)

demo_powerdown.ino

• idem

TODO

more testing