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Software Serial TX and RX #1654

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gfwilliams opened this issue Apr 24, 2019 · 2 comments
Closed

Software Serial TX and RX #1654

gfwilliams opened this issue Apr 24, 2019 · 2 comments

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@gfwilliams
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Started here: http://forum.espruino.com/conversations/333049

Software serial RX works alone, as does TX. However together there are issues:

var s = new Serial();
s.setup(600,{rx:B3, tx:B4});
s.on('data', function (data) { print("<SoftSerial>"+data); });
setTimeout(function() {
//  s.print("H"); // fine
//  s.print("Hello"); // garbage
}, 500);

Only the last character sent seems to be received correctly - at any baud rate.
@MaBecker
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Hmm 7 byte very small, is it possible to increase the buffer?

Espruino/src/jsserial.c

Line 194 in 23665d0

char buf[7]; ///< received data

@gfwilliams
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Just done, to 64 - it does come out of JsVars so it's not going to cause too many problems I guess.

Still 7 bytes @ 9600 baud means you have around 7ms of execution time to fill before you hit issues

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@gfwilliams @MaBecker