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Add CRC8 calculation subsystem to quantum (#12641)

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* 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.
This commit is contained in:
Stefan Kerkmann 2021-06-18 01:09:43 +02:00 • committed by GitHub
parent 67fa2568fe
commit ef92c9ee2c
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4 changed files with 115 additions and 0 deletions
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6
tmk_core/common/keyboard.c
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@ -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