Difference between revisions of "Attiny84 Part-2"
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* Notice the blink rate.Open Putty and set the Baud rate to 4800 (38400/8=4800)<br> | * Notice the blink rate.Open Putty and set the Baud rate to 4800 (38400/8=4800)<br> | ||
| − | arduino-ISP commands<br> | + | '''arduino-ISP commands'''<br> |
| − | + | avrdude -P com40 -b 19200 -c avrisp -p t84 -v -e -U efuse:w:0x05:m -U hfuse:w:0xD6:m -U lfuse:w:0xFF:m | |
| − | + | avrdude -P comport -b 19200 -c avrisp -p m328p -v -e -U efuse:w:0x05:m -U hfuse:w:0xD6:m -U lfuse:w:0xFF:m | |
| − | + | avrdude -c usbtiny -p m328p -v | |
| + | avrdude -P com40 -b 19200 -c avrisp -p t84 -v | ||
| + | avrdude -P com40 -b 19200 -c arduino -p t84 -v | ||
| + | ---- | ||
| + | '''Part 2 Project completed.''' | ||
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---- | ---- | ||
==[[ ATtiny84 Class ]]== | ==[[ ATtiny84 Class ]]== | ||
Latest revision as of 21:29, 9 June 2022
ATtiny 84
___________
+5 1| |14 GND
Pin 0 XTL1 2| |13 Pin 10 Connect Green Led
Pin 1 XTL2 3| |12 Pin 9 Connect Red Led
Reset 4| |11 Pin 8
Pin 2 TX 5| |10 Pin 7
in 3 RX 6| |9 Pin 6 SCL
Pin 6 SDA 7|___________|8 Pin 5 MISO
ATtiny 84
___________
+5 1| |14 GND
Pin 10 XTL1 2| |13 Pin 0 Connect Green Led
Pin 9 XTL2 3| |12 Pin 1 Connect Red Led
Reset 4| |11 Pin 2
TX on Serial cable Pin 8 RX 5| |10 Pin 3
RX on Serial cable Pin 7 TX 6| |9 Pin 4 SCL
Pin 6 SDA 7|___________|8 Pin 5 MISO
ATtiny 84 Part 2
Setup ATtiny 84 at 1MHz and write blink program and flash to chip to connect a RS232 interface.
- Connect USBtiny to ATtiny 84 Target Board.
- Test the connection to programmer: avrdude -p t84 -c usbtiny -v
- Load Arduino IDE and change Board settings to Atiny Core by Spence Konde Version 1.1.2
- Load +BlinkATtiny84_RS232 Arduino file. (Do not Flash at this time)
- Find AVRDUDE on your laptop - Or download it from https://www.nongnu.org/avrdude/
- Using AVRDude Set Fuses to 1MHz : (Skip if using a new chip it should already be set.)
* avrdude -p t84 -c usbtiny -v -U lfuse:w:0x62:m Disables External Clock on PB2 Enable Divide by 8 Clock (1MHz) Default setting
- Flash Blink ATiny84 file to chip from Arduino IDE using "Upload Using Programmer under Sketch Tab"
- Notice the blink rate. Open Putty and set the Baud rate to 4800 (38400/8=4800)
- Using AVRDude Set Fuses to 8MHz avrdude -p t84 -c usbtiny -v -U lfuse:w:0xE2:m Disables External Clock on PB2 Disables Divide by 8 Clock (8MHz)
- Notice the faster blink rate. Open Putty and set the Baud rate to 38400
- Connect 16Mhz external clock board
- Using AVRDude Set Fuses to 16MHz avrdude -p t84 -c usbtiny -v -U lfuse:w:0xff:m "Enable External clock on PB2 Enables (16MHz)
- Notice the even faster blink rate. Open Putty and set the Baud rate to 76800 (4800* 16= 76800)
- Using AVRDude Set ATtiny Chip back to 1MHz avrdude -p t84 -c usbtiny -v -U lfuse:w:0x62:m
- Remove 16MHz Clock Board.
- Notice the blink rate.Open Putty and set the Baud rate to 4800 (38400/8=4800)
arduino-ISP commands
avrdude -P com40 -b 19200 -c avrisp -p t84 -v -e -U efuse:w:0x05:m -U hfuse:w:0xD6:m -U lfuse:w:0xFF:m avrdude -P comport -b 19200 -c avrisp -p m328p -v -e -U efuse:w:0x05:m -U hfuse:w:0xD6:m -U lfuse:w:0xFF:m avrdude -c usbtiny -p m328p -v avrdude -P com40 -b 19200 -c avrisp -p t84 -v avrdude -P com40 -b 19200 -c arduino -p t84 -v
Part 2 Project completed.
