ports/alif: Implement hardware accelerated CRC.

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>
This commit is contained in:
iabdalkader 2025-08-24 19:05:13 +02:00
parent facd715c12
commit 1dd9b33acc
2 changed files with 71 additions and 0 deletions

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@ -9,6 +9,7 @@
HAL_SRC_C += \ HAL_SRC_C += \
drivers/source/adc.c \ drivers/source/adc.c \
drivers/source/crc.c \
drivers/source/dma_ctrl.c \ drivers/source/dma_ctrl.c \
drivers/source/dma_op.c \ drivers/source/dma_op.c \
drivers/source/i2c.c \ drivers/source/i2c.c \

70
ports/alif/omv_crc.c Normal file
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@ -0,0 +1,70 @@
/*
* SPDX-License-Identifier: MIT
*
* Copyright (C) 2023-2024 OpenMV, LLC.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "crc.h"
#include "global_map.h"
#include "omv_crc.h"
#define CRC0 ((CRC_Type *)CRC0_BASE)
static bool crc_initialized = false;
void omv_crc_init(void) {
crc_clear_config(CRC0);
crc_enable_16bit(CRC0);
crc_enable_custom_poly(CRC0);
crc_set_custom_poly(CRC0, OMV_CRC_POLY);
crc_set_seed(CRC0, OMV_CRC_INIT);
crc_enable(CRC0);
crc_initialized = true;
}
omv_crc_t omv_crc_start(const void *buf, size_t size) {
if (!crc_initialized) {
omv_crc_init();
}
if (size == 0) {
return OMV_CRC_INIT;
}
uint32_t result = 0;
crc_calculate_16bit(CRC0, buf, size, &result);
return (omv_crc_t)result;
}
omv_crc_t omv_crc_update(omv_crc_t crc, const void *buf, size_t size) {
if (!crc_initialized) {
omv_crc_init();
}
if (size == 0) {
return crc;
}
// Set current CRC value and calculate incrementally
crc_set_seed(CRC0, crc);
uint32_t result = 0;
crc_calculate_16bit(CRC0, buf, size, &result);
return (omv_crc_t)result;
}