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i2c-tiny-usb - (c) 2006 by Till Harbaum |
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http://www.harbaum.org/till/i2c_tiny_usb |
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The firmware code itself is distributed under the GPL, but |
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one of the usb codes comes under a separate license. Plase see |
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the .txt files in usbdrv for details. |
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The default configuration is for a attiny45. The Makefile.mega8 |
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allows to compile the device for the Atmega8 cpu. This includes |
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the possibility to use the atmega8 rs232 for debugging. |
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The attiny45 has to be programmed in high voltage serial |
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programming (hsvp) mode since this application needs the |
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reset pin to be reconfigured for other use. |
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This project supports two usb implementations: the avrusb and |
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usbtiny. Due to this four Makefiles exist: |
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Makefile-avrusb.tiny45 - build with avrusb for Attiny45 |
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Makefile-avrusb.mega8 - build with avrusb for Atmega8 |
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Makefile-usbtiny.tiny45 - build with usbtiny for Attiny45 |
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Makefile-usbtiny.mega8 - build with usbtiny for Atmega8 |
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Just type |
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make -f Makefile-avrusb.xxx program |
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or |
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make -f Makefile-usbtiny.xxx flash |
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to compile and upload the file. Please adjust e.g. programmer |
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settings in the Makefile. |
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If you don't want to recompile the firmware yourself you might |
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use the included firmware.hex which is a prebuilt binary for the |
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attiny45. Plase make sure you adjust the fuses accordingly. |
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They need to be set to "external crystal > 8Mhz" and the RESET |
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pin has to be disabled in order to be re-used for application |
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specific purposes. See Makefile-avrusb.tiny45 for more details. |