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Enforcing requirements so XON/XOFF software handshake works and no drops of data are experienced while transferring data to an SD Card. I tested this with a CH340 USB to serial adapter (quite typical) at baudrates as high as 1000000 on a Atmega2560 running at 16Mhz, with no problems at all. We need a 1024 byte RX buffer. Less than that and we will have drops, higher than that is not needed

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etagle 2017-08-08 02:30:04 -03:00
parent 9e147e9ac4
commit 3e5485de92
1 changed files with 3 additions and 0 deletions
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Marlin/MarlinSerial.h
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@ -84,6 +84,9 @@
#ifndef RX_BUFFER_SIZE
#define RX_BUFFER_SIZE 128
#endif
#if ENABLED(SERIAL_XON_XOFF) && RX_BUFFER_SIZE < 1024
#error "XON/XOFF requires a 1024 or greater RX_BUFFER_SIZE for allowing reliable transfers without drops"
#endif
#ifndef TX_BUFFER_SIZE
#define TX_BUFFER_SIZE 32
#endif