WEEK 12 - This Weeks goals:

INTERFACE CIRCUITRY

• Resolved issues with the port0 commands (must be set to 0xFF for output).
• Need to test D Flip-Flop with a 3V power source and a 5V input signal to see what voltage is output (3V or 5V). TESTED OK WITH 3V.
• Decide whether use a voltage divider circuit or decide if we are using 5V for all circuitry. Use 3V for All.
• The VE IC output port signal is a 3V logic level. Not sure if this will be enough to drive the D Flip-Flops if using a 5V source. USING 3V.
• If use a 3V source for all circuitry except PP4001, will need current limiting resistors to limit current from status byte to 20mA.
• Finish coding the Continuous Listening part of our program and test the interface circuitry as well as the STATUS BYTE information.

WEEK 11 - This weeks goals:

All the commands for port1 (data for play, etc.) are working correctly. I called Sensory to find out why port0 is not responding. The maximum input current is 20 mA for the input ports 0 and 1. The voltage on the J1 connector should be 3V (not 5!). I am waiting for an e-mail reply from Vivek Krishnan (vkrishnan@sensoryinc.com)

WEEK 10 - This weeks goals:

Here is the KEYFOB.VEC program that Sensory e-mailed me (in pdf format). We need to figure out

(1) Why the Sensory chip doesn't send a 0x00. It is sending a 0x80.

(2) What the resistance and maximum input current values are for the VE IC.

(3) Why the program I wrote does not send the control command, only sends the function command (ie sends play but not write, to write it to the PP4001 IC)

(4) Test the D flip flop for high impedance and see what settings we need to have sent to the PP4001.

(5) Try to see if we can get a packaged resistor IC.

WEEK 9 - This weeks goals:

I rewired the circuit and successfully turned on and off my SONY TV and tested the channel up / channel down commands which also worked. We need to start analyzing the status bit returned by the PP4001 IC and start programming the VE IC this week.

To send a command, set the enable low, put in the 8 bit code and then toggle the write bit. Then set the button pressed bit to a logic 0 and rewrite to the PP4001 to send the command to the IR device.

WEEK 8- This weeks Goals:

I FINISHED ORDERING ALL PARTS THIS MORNING, THE CERAMIC RESONATOR WILL ARRIVE FRIDAY. WE WILL BE BUILDING AND TESTING THE CIRCUITRY NEXT WEEK. READ THE PP4001 DOCUMENT TO LEARN HOW THE STATUS BYTE IS USED AND ALSO LOOK AT THE DATASHEETS BELOW FOR THE VOLTAGE AND NOISE MARGIN SPECIFICATIONS. WE WILL BE USING SOMEWHERE BETWEEN 3 AND 5 VOLTS DC FOR POWER TO THE IC'S AND THE POWER SUPPLY PROVIDED WITH THE VE-IC. WE NEED TO MAKE A FLOWCHART FOR THE PROCEDURES THAT WILL TAKE PLACE WHEN PROGRAMMING THE DEVICE (I.E. SETTING UP A VCR FOR THE FIRST TIME) AND ALSO WHEN ISSUING COMMANDS SUCH AS STOP, PLAY, ETC... PLEASE READ HOW TO DO THIS AND E-MAIL ME IF YOU HAVE ANY QUESTIONS.

Here are all the datasheets: MC74HC574 | MC74HC32 | PN2222A | 2N3906 | EFO-MC1205B4 | Resonator

Here are the port commands to send to the PP4001

Data Sheets for MC74HC574 (3-State Noniverting D Flip-Flop) and MC74HC32 (Quad 2-Input OR Gate). Read how these in conjunction with the diagram on page 9 of the PP4001 documentation work so we know how to write and read to PP4001 IC from the micro-controller

• Plan connections and interface and try to write port configurations for functions that correspond to command on the remote.
• Order parts for interconnection of IC SP4001. Also get wires to connect the output port pins to our interface circuitry
• Here are some part distributors: Newark | Future Active | Jameco Electronics
• Read this if you want to know how to create voice prompts. ( i.e. "Enter command X" where X={1, 2, ..., n} )
• Get the voice prompting incorporated with the sdsfx.vec program and modify it to simulate an output function. Test this at the ports with LEDs.
• Read about how to implement CONTINUOUS LISTENING

  Use PORT1 Pins 0-7 for command = 0xFF to configure all bits in this port for output.

  Button Pressed

  bit6

  bit5

  bit4

  bit3

  bit2

  bit1

  bit0

  Use PORT0 pins 4-2 for Read, Write and Enable = 0x1C to configure pins 4,3,2 in this port for output.

  X

  Flash mem

  Flash mem

  Read

  Write

  Enable

  X

  X

  *Note: X, denotes not used. Do NOT use pins P0.6 and P0.5 under any circumstances, they are for Flash memory only.

Here are the Infrared Binary Codes for the PP4001 that are to be sent on PORT1 Pins 0-7.

These are the SPEAKER DEPENDENT program files in PDF from the Sensory VE-IDE development program. (NOTE: vec = program file, veh = header file)

[sdsfx.vec (Sample program for speaker dependent technology)] [ve.veh (Standard VE definitions)] [sddemoa.veh (SV sentence table)] [sdsfx.veh (Local definitions)]

VE Programming - Steps for programming the IC