EL Prototyping - Jacob-Dixon/MysticWhip GitHub Wiki

##Prototype Schematic and Board Layout, and Flow Chart

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##Hardware and Software Inputs

###Hardware

Input Name	Description of Signal	Expected Range
Power	Provides power to the EL Driver circuit.	5V
SDA	Receives data from the MCU through I^2C	5V square wave logic
SCL	Receives the MCU’s clock through I^2C	5V square wave clock

###Software

Function Name	Description of expected outputs	Input Parameters	Return Value
I2C.writeReg(ADDRESS, REGISTER, DATA)	Writes data to the EL Driver.	A byte for the address, a byte for the register, and a byte for data.	void
I2C.writeRegs(ADDRESS, REGISTER, BUFFER, LENGTH)	Writes data to multiple registers.	A byte for the address, a byte for the starting register, multiple bytes for data, and a byte for the number of registers written to.	void
ELWire.init(ADDRESS)	Initializes code for the driver.	A byte for the address.	void
ELWire.setColor(ELREG2, ELREG3, ELREG4)	Writes desired output voltage for each EL output.	A byte for each EL Wire output. (excluding EL Wire 1)	void
ELWire.setFreq(FREQUENCY)	Writes the operating frequency for all EL wires.	A byte for the EL wire frequency	void

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##Hardware and Software Outputs

Output Name	Description of Signal	Expected Range
Three AC signals	Outputs an AC signal to all three EL wires.	(40 – 300) Vpp
SDA	Sends data to MCU through I^2C.	5V square wave logic
I2C.readReg(ADDRESS, REGISTER)	Sends the data held in the register.	byte
I2C.readRegs(ADDRESS, REGISTER, BUFFER, LENGTH)	Sends data from multiple registers.	Multiple bytes

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##Testing and Debug points

###Hardware Test Points

Test Point Name	Description of Signal	Range of Values
EL Wire 2	This is the output line for one of the EL wires, which can also act as a test point. From this, I will be able to see what kind of AC signal I am outputting.	(40 – 300) Vpp
EL Wire 3	This is the output line for one of the EL wires, which can also act as a test point. From this, I will be able to see what kind of AC signal I am outputting.	(40 – 300) Vpp
EL Wire 4	This is the output line for one of the EL wires, which can also act as a test point. From this, I will be able to see what kind of AC signal I am outputting.	(40 – 300) Vpp

###Software Debug Locations

Debug Location	Description of signal and debug statement method	Expected outputs
Reached correct state of whip	The main program will access the change ELWires function. When this happens, the MCU will give confirmation.	Serial write back to the Serial Monitor.