TinyISP-Tuner Old

Assembly: Here

1. FTDI Connection
2. ATmega328p - Runs TinyISP Sketch configured with Tuning enabled. (Pre-programmed)
3. 20pin Socket for ATtiny2313\4313
4. 14pin Socket for ATtiny84\44\24
5. 8pin Socket for ATtiny85\45\25
6. Status LED controlled by ATmega328p and TinyISP Sketch on pin 9
7. ATmega328p ICSP Program header

Versions: 1.0 Development 1.1 Initial Shipping - Adds 0.1uF Cap and 10K Resistor to reset line

Guide: The TinyISP-Tuner makes programming and tuning ATtiny Microcontrollers a snap. Before you begin there are few things you need to download

• Arduino IDE
• TinyCore Follow the directions in the readme file
• TinyISP (Only needed if you want to re-program or change options on the ATmega328p)
• TinyTuner2

A few notes about using the TinyISP-Tuner

• Never have more than 1 ATtiny in one of the sockets.
• Always check the orientation before powering up.
• Always power down before inserting\removing an IC.
• If you don’t want the hassle of removing the IC you can slightly push it in the socket instead of all the way.
• You can use this just to program ATtinys without tuning them or if you have already tuned them.

Setup: (At this point, TinyCore should be installed) Once you extract and run the Arduino IDE it creates a project folder. In that folder extract the TinyISP(if needed, see configuring TinyISP below) and TinyTuner2. Open the Arduino IDE and open File|Examples|TinyTuner2|WriteToEEPROM Only thing you need to modify that helps is after void setup(void) { add delay(4000); This gives you some time to open the serial monitor and enable debug monitoring so you can see the output. You can also use the other example if you don’t want to save tuner value to EEPROM. Its called PrintUsingKnockBang Hardware Setup: Attach the ATtiny you want to program\tune into one of the sockets with the notch facing the LED. To make it easier to remove you don’t have to push the ATtiny all the way down. Plug the FTDI cable with the Black\GND at the bottom of the header. Programming: Under Tools|Programmer make sure it is set to Arduino as ISP. Set Board to Attiny your are using and the speed, I would use 8Mhz. Select Tools|Burn Bootloader Once it is done Select Upload|Upload using programmer Open the serial monitor and make sure speed is 19200 and send a “!”. Now you should see the output of the tuning status. If you used the write to EEPROM version it will say when it has saved. If you used the PrintUsingKnockBang version it will print the value you need for tuning and how to add to your code. How to read from EEPROM Once you have saved the tuned value to EEPROM you need to load it for each sketch you use. Using EEPROM is helpful so you don’t have to change your code for each different ATtiny you use. At the top add: #include <EEPROM.h> Then in your setup function add: If using : 8Mhz OSCCAL = EEPROM.read(E2END); 1Mhz OSCCAL = EEPROM.read(E2END-1); 16Mhz(Not sure which ones support internal 16Mhz) OSCCAL = EEPROM.read(E2END-2); Configuring TinyISP Here is the settings that are used in TinyISP. This is useful if you want to reprogram the ATmega328p with TinyISP. Once the TinyISP sketch is opened Switch to the tab called _TinyISP_BuildOptions.hand make sure the following is set.

• #define PROGRAMMER_SPI_CLOCK  NORMAL
• #define RELAY_KNOCK_BANG_ENABLED  1
• #define TUNING_SIGNAL_ENABLED  1

Example code and design files available on Github: https://github.com/FriedCircuits/FC-TinyISP-Tuner