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fionoob

Reset na Porta USB

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Trabalho com hardware... sou uma negação em softaware porem tenho um problema que quero tentar resolver sem alterar meu produto.

Gostaria de saber como eu faço para resetar a porta USB de forma incondicional... tenho um equipamento Serial que se comunica com o PC via um conversor USB e as veses ele trava e normalmente um restart usando o Devcon resolve, mas, dependendo de como a porta ficou travada é necessário desplugar e plugar novamente para que volte a funcionar.

Ja fiz todos os testes e o problema esta no windows ou no driver do conversor.... como não tenho como alterar o driver pois é proprientário preciso de alguma coisa que faça o reset mesmo que o windows diga "esta porta esta sendo usada" ou "porta inacessivel"... efim algum jeito que eu mande resetar e ele faça independente do estado da porta.

Olhado pelo ponto de vista do Hardware, de acordo com a norma USB para que um reset ocorra basta colocar as linhas D+ e D- em 0 por mais de 2,5us porem não achei nada que tivesse esta função.

Obs.:Uso o Windos XP pro.

Fabio

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