Reduce PROGMEM usage for sendstring LUT (#8109)
* Reduce PROGMEM usage for keycode map Bit-pack the keycode bool array to gain back a small amount of flash space. The trade-off is an increase in runtime instructions when running macros. It does make the code a bit harder to read, as well as maintain. For configs that use send_string() et al, it saves ~100 bytes. * Switch to macro and common definition Rewrite the array declarations so both the unpacked (original) and packed LUT arrays can use the same value definitions. This is done by defining a macro that "knows what to do". This makes the code much easier to read and maintain. * Fix macro typos and improve perf Pack the bits in a more efficient order for extraction. And also fix the copy/paste error in the macro... * Switch fully to packed LUT Some minor reformatting. Compile tested all sendstring_xyz.h to make sure they were converted properly. Also checked that an unconverted version would generate a compile error. * Apply whitespace suggestions from code review Co-Authored-By: Ryan <fauxpark@gmail.com> Co-authored-by: Ryan <fauxpark@gmail.com>
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12 changed files with 419 additions and 350 deletions
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@ -211,9 +211,21 @@ typedef ioline_t pin_t;
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#define SEND_STRING(string) send_string_P(PSTR(string))
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#define SEND_STRING_DELAY(string, interval) send_string_with_delay_P(PSTR(string), interval)
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extern const bool ascii_to_shift_lut[128];
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extern const bool ascii_to_altgr_lut[128];
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// Look-Up Tables (LUTs) to convert ASCII character to keycode sequence.
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extern const uint8_t ascii_to_keycode_lut[128];
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extern const uint8_t ascii_to_shift_lut[16];
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extern const uint8_t ascii_to_altgr_lut[16];
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// clang-format off
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#define KCLUT_ENTRY(a, b, c, d, e, f, g, h) \
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( ((a) ? 1 : 0) << 0 \
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| ((b) ? 1 : 0) << 1 \
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| ((c) ? 1 : 0) << 2 \
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| ((d) ? 1 : 0) << 3 \
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| ((e) ? 1 : 0) << 4 \
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| ((f) ? 1 : 0) << 5 \
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| ((g) ? 1 : 0) << 6 \
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| ((h) ? 1 : 0) << 7 )
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// clang-format on
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void send_string(const char *str);
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void send_string_with_delay(const char *str, uint8_t interval);
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