![]() ![]() Slightly smaller code size in spite of high level language modules.Modular concept: easier to integrate into existing designs.All customizable code written in ANSI-C and thus easier to maintain.Our USB driver has the following advantages over Igor’s driver: Little hardware resources used: only two to three I/O pins.Īdvantages over other Firmware-Only ImplementationsĪ similar driver for the AVR series of microcontrollers is available from Igor Češko.More freedom in the choice of USB descriptors.This may be relevant for battery powered devices. No additional power consumption when USB is disconnected.No additional hardware complexity: simpler PCB, less failures.They don’t work without connection to the host. Stand-alone operation: Some of the USB controllers download their firmware from the host computer into RAM.AVR controllers are faster than most of the controllers with integrated USB and cost less.A good free ANSI-C compiler (GNU gcc) and a free development system for Windows (WinAVR) are available for AVR. ![]()
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