UART vs SPI

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salve tutti...sto realizzando un progetto che prevede l'utilizzo di tre moduli che comunicano con arduino; due comunicano tramite uart e uno tramite spi. ora non essendo un esperto mi chiedo se la cosa non possa creare problemi o se fosse meglio che tutti comunichino nello stesso modo. così naso preferirei la seconda opzione ma mi farebbe piacere un vostro consiglio...
eventualmente mi potreste suggerire un rtc che comunichi via uart???

grazie mille

davide

la seriale che viene gestito dal uart é una seriale bidirezionale asincrona con una velocitá ridotta e per collegare 2 apparecchi. segnali viaggiano su 2 fili.
la spi é una seriale bidirezionale sincrona (con un segnale clock) e un segnale per selezionare del apparecchio (si possono collegare piú cose al arduino). segnali viaggiano su 3 fili e uno in piú per ogni dispositivo collegato.
non credo che trovi rtc con interfaccia seriale uart. perché non usi un rtc con i2c?

spiegaci cosa vuoi fare e che distanze devi coprire.

ciao uwe


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