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make LETTTER_OFF return values that match param indices range

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This commit is contained in:
Bob-the-Kuhn 2017-06-29 08:59:13 -05:00
parent cd2ac3b759
commit e6e3132f79
1 changed files with 1 additions and 1 deletions
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2
Marlin/gcode.h
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@ -104,7 +104,7 @@ public:
// Index so that 'X' falls on index 24
#define PARAM_IND(N) ((N) >> 3)
#define PARAM_BIT(N) ((N) & 0x7)
#define LETTER_OFF(N) ((N) - 'A' + 1)
#define LETTER_OFF(N) ((N) - 'A')
#define LETTER_IND(N) PARAM_IND(LETTER_OFF(N))
#define LETTER_BIT(N) PARAM_BIT(LETTER_OFF(N))