Add serial XON/XOFF handshaking

From @ejtagle, originally #7459
2017-10-02 02:47:30 -05:00
parent af15383578
commit 508d764d63
6 changed files with 279 additions and 104 deletions
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
@ -108,8 +108,9 @@
 *
 * 250000 works in most cases, but you might try a lower speed if
 * you commonly experience drop-outs during host printing.
+ * You may try up to 1000000 to speed up SD file transfer.
 *
- * :[2400, 9600, 19200, 38400, 57600, 115200, 250000]
+ * :[2400, 9600, 19200, 38400, 57600, 115200, 250000, 500000, 1000000]
 */
 #define BAUDRATE 250000