Add CRC8 calculation subsystem to quantum (#12641)

* Intended usage is data validation in split transport code.
* Default space efficient algorithm.
* Opt-in fast table based algorithmn with #define CRC8_USE_TABLE switch.
* Define switches for size and speed optimized versions, the default is size
  optimized by using uint_least8_t as datatype for calculations.
  * #define CRC8_OPTIMIZE_SPEED uses uint_fast8_t as datatype for
    calculations, this only affects 32-bit Archs like ARM and RISC-V.
* Placeholder crc_init() function for hardware backed crc calculation,
  not implemented yet.

1 files changed, 6 insertions, 0 deletions

diff --git a/tmk_core/common/keyboard.c b/tmk_core/common/keyboard.c
index 249da85bd..28fa97bc8 100644
--- a/tmk_core/common/keyboard.c
+++ b/tmk_core/common/keyboard.c
@@ -103,6 +103,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifdef EEPROM_DRIVER
 #    include "eeprom_driver.h"
 #endif
+#if defined(CRC_ENABLE)
+#    include "crc.h"
+#endif
 
 static uint32_t last_input_modification_time = 0;
 uint32_t        last_input_activity_time(void) { return last_input_modification_time; }
@@ -300,6 +303,9 @@ void keyboard_init(void) {
     timer_init();
     sync_timer_init();
     matrix_init();
+#if defined(CRC_ENABLE)
+    crc_init();
+#endif
 #ifdef VIA_ENABLE
     via_init();
 #endif