BLE FOTA APP
It doesn't work with the default FOTA bootloader. It use NVIC_SystemReset() to enter a bootloader.
nRF51822/nordic/app_common/crc16.cpp@1:a607cd9655d7, 2014-10-10 (annotated)
- Committer:
- yihui
- Date:
- Fri Oct 10 03:36:28 2014 +0000
- Revision:
- 1:a607cd9655d7
use NVIC_SystemReset() to run bootloader
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
yihui | 1:a607cd9655d7 | 1 | /* Copyright (c) 2013 Nordic Semiconductor. All Rights Reserved. |
yihui | 1:a607cd9655d7 | 2 | * |
yihui | 1:a607cd9655d7 | 3 | * The information contained herein is property of Nordic Semiconductor ASA. |
yihui | 1:a607cd9655d7 | 4 | * Terms and conditions of usage are described in detail in NORDIC |
yihui | 1:a607cd9655d7 | 5 | * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT. |
yihui | 1:a607cd9655d7 | 6 | * |
yihui | 1:a607cd9655d7 | 7 | * Licensees are granted free, non-transferable use of the information. NO |
yihui | 1:a607cd9655d7 | 8 | * WARRANTY of ANY KIND is provided. This heading must NOT be removed from |
yihui | 1:a607cd9655d7 | 9 | * the file. |
yihui | 1:a607cd9655d7 | 10 | * |
yihui | 1:a607cd9655d7 | 11 | */ |
yihui | 1:a607cd9655d7 | 12 | |
yihui | 1:a607cd9655d7 | 13 | #include "crc16.h" |
yihui | 1:a607cd9655d7 | 14 | #include <stdio.h> |
yihui | 1:a607cd9655d7 | 15 | |
yihui | 1:a607cd9655d7 | 16 | uint16_t crc16_compute(const uint8_t * p_data, uint32_t size, const uint16_t * p_crc) |
yihui | 1:a607cd9655d7 | 17 | { |
yihui | 1:a607cd9655d7 | 18 | uint32_t i; |
yihui | 1:a607cd9655d7 | 19 | uint16_t crc = (p_crc == NULL) ? 0xffff : *p_crc; |
yihui | 1:a607cd9655d7 | 20 | |
yihui | 1:a607cd9655d7 | 21 | for (i = 0; i < size; i++) |
yihui | 1:a607cd9655d7 | 22 | { |
yihui | 1:a607cd9655d7 | 23 | crc = (unsigned char)(crc >> 8) | (crc << 8); |
yihui | 1:a607cd9655d7 | 24 | crc ^= p_data[i]; |
yihui | 1:a607cd9655d7 | 25 | crc ^= (unsigned char)(crc & 0xff) >> 4; |
yihui | 1:a607cd9655d7 | 26 | crc ^= (crc << 8) << 4; |
yihui | 1:a607cd9655d7 | 27 | crc ^= ((crc & 0xff) << 4) << 1; |
yihui | 1:a607cd9655d7 | 28 | } |
yihui | 1:a607cd9655d7 | 29 | |
yihui | 1:a607cd9655d7 | 30 | return crc; |
yihui | 1:a607cd9655d7 | 31 | } |