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Merge pull request #3738 from thinkyhead/rc_limit_i2c_request

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Print an error on bad i2c request
This commit is contained in:
Scott Lahteine 2016-05-11 19:36:49 -07:00
parent a42655b9ac aaeadf0cbd
commit 675e92ab1f
1 changed files with 6 additions and 2 deletions
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8
Marlin/Marlin_main.cpp
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@ -5038,12 +5038,16 @@ inline void gcode_M121() { endstops.enable_globally(false); }
*/ */
inline void gcode_M156() { inline void gcode_M156() {
uint8_t addr = code_seen('A') ? code_value_short() : 0; uint8_t addr = code_seen('A') ? code_value_short() : 0;
int bytes = code_seen('B') ? code_value_short() : 0; int bytes = code_seen('B') ? code_value_short() : 1;
if (addr && bytes) { if (addr && bytes > 0 && bytes <= 32) {
i2c.address(addr); i2c.address(addr);
i2c.reqbytes(bytes); i2c.reqbytes(bytes);
} }
else {
SERIAL_ERROR_START;
SERIAL_ERRORLN("Bad i2c request");
}
} }
#endif //EXPERIMENTAL_I2CBUS #endif //EXPERIMENTAL_I2CBUS