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Comments (2)

leocelente avatar leocelente commented on June 16, 2024

Funcional mas pode melhorar

No momento o código que existe detecta transições do sinal I usando polling. Em teoria, dá pra fazer o calculo da frequência com dois timers.

Possível Implementação

Um timer periódico executando uma interrupt a cada delta_tempo millisegundos. Tudo que essa interrupts faz é pegar o valor de um segundo timer.

Esse segundo timer é configurado como um contador, que acumula com pulsos externos

Pseudo código

counter_interrupt:
    nop                        ; implicito counter++

timer_done: 
    read counter               ; lê quantidade de voltas
    div  counter, delta_tempo  ; calcula velocidade
    write counter 0            ; reseta

Referencia

https://letanphuc.net/2015/06/stm32f0-timer-tutorial-and-counter-tutorial/

Validação

Continuar com o esquema de gerar a onda quadrada pelo Proteus

from drivers.

leocelente avatar leocelente commented on June 16, 2024

Não temos previsão de usar em projetos atualmente, vamos reabrir o issue quando for necessário

from drivers.

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