Orefatoi / Mbed 2 deprecated afero_node_suntory_171018

pwm period is now 200us instead of the default 20ms veml6040 config is now AF_BIT | TRIG_BIT

Dependencies:   mbed MMA8451Q USBDevice WakeUp vt100

Fork of afero_node_suntory_2017_06_15 by Orefatoi

util/CheckSum.cpp@0:20bce0dcc921, 2016-12-20 (annotated)

Committer:
wataloh
Date:
Tue Dec 20 01:51:02 2016 +0000
Revision:
0:20bce0dcc921
kl25z teensy merged

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wataloh 0:20bce0dcc921 1 #include "CheckSum.h"
wataloh 0:20bce0dcc921 2
wataloh 0:20bce0dcc921 3 uint32_t *CheckSum::table = NULL;
wataloh 0:20bce0dcc921 4
wataloh 0:20bce0dcc921 5 CheckSum::CheckSum()
wataloh 0:20bce0dcc921 6 {
wataloh 0:20bce0dcc921 7 reset();
wataloh 0:20bce0dcc921 8 }
wataloh 0:20bce0dcc921 9
wataloh 0:20bce0dcc921 10 void
wataloh 0:20bce0dcc921 11 CheckSum::reset()
wataloh 0:20bce0dcc921 12 {
wataloh 0:20bce0dcc921 13 checkSum = 0xFFFFFFFF;
wataloh 0:20bce0dcc921 14 if(table==NULL)
wataloh 0:20bce0dcc921 15 {
wataloh 0:20bce0dcc921 16 table = new uint32_t[256];
wataloh 0:20bce0dcc921 17 for (uint32_t i = 0; i < 256; i++)
wataloh 0:20bce0dcc921 18 {
wataloh 0:20bce0dcc921 19 uint32_t c = i;
wataloh 0:20bce0dcc921 20 for (int j = 0; j < 8; j++)
wataloh 0:20bce0dcc921 21 {
wataloh 0:20bce0dcc921 22 c = (c & 1) ? (0xEDB88320 ^ (c >> 1)) : (c >> 1);
wataloh 0:20bce0dcc921 23 }
wataloh 0:20bce0dcc921 24 table[i] = c;
wataloh 0:20bce0dcc921 25 }
wataloh 0:20bce0dcc921 26 }
wataloh 0:20bce0dcc921 27 }
wataloh 0:20bce0dcc921 28
wataloh 0:20bce0dcc921 29 void
wataloh 0:20bce0dcc921 30 CheckSum::calc(uint8_t *buf, size_t len)
wataloh 0:20bce0dcc921 31 {
wataloh 0:20bce0dcc921 32 for (size_t i = 0; i < len; i++)
wataloh 0:20bce0dcc921 33 {
wataloh 0:20bce0dcc921 34 checkSum = table[(checkSum ^ buf[i]) & 0xFF] ^ (checkSum >> 8);
wataloh 0:20bce0dcc921 35 }
wataloh 0:20bce0dcc921 36 }
wataloh 0:20bce0dcc921 37
wataloh 0:20bce0dcc921 38 CheckSum::CheckSumCRC32
wataloh 0:20bce0dcc921 39 CheckSum::get()
wataloh 0:20bce0dcc921 40 {
wataloh 0:20bce0dcc921 41 CheckSumCRC32 crc32;
wataloh 0:20bce0dcc921 42 crc32.uint32 = checkSum ^ 0xFFFFFFFF;
wataloh 0:20bce0dcc921 43 return crc32;
wataloh 0:20bce0dcc921 44 }