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tried to increase stability
This commit is contained in:
lumapu 2022-06-16 23:56:29 +02:00
parent e05d2220cb
commit c61d9568ba
20 changed files with 113 additions and 44 deletions
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24
tools/esp8266/crc.cpp
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@ -1,3 +1,8 @@
//-----------------------------------------------------------------------------
// 2022 Ahoy, https://www.mikrocontroller.net/topic/525778
// Creative Commons - http://creativecommons.org/licenses/by-nc-sa/3.0/de/
//-----------------------------------------------------------------------------
#include "crc.h"
uint8_t crc8(uint8_t buf[], uint8_t len) {
@ -7,6 +12,7 @@ uint8_t crc8(uint8_t buf[], uint8_t len) {
for(uint8_t b = 0; b < 8; b ++) {
crc = (crc << 1) ^ ((crc & 0x80) ? CRC8_POLY : 0x00);
}
yield();
}
return crc;
}
@ -21,23 +27,9 @@ uint16_t crc16(uint8_t buf[], uint8_t len, uint16_t start) {
shift = (crc & 0x0001);
crc = crc >> 1;
if(shift != 0)
crc = crc ^ 0xA001;
crc = crc ^ CRC16_MODBUS_POLYNOM;
}
yield();
}
return crc;
}
uint16_t crc16nrf24(uint8_t buf[], uint16_t lenBits, uint16_t startBit, uint16_t crcIn) {
uint16_t crc = crcIn;
uint8_t idx, val = buf[(startBit >> 3)];
for(uint16_t bit = startBit; bit < lenBits; bit ++) {
idx = bit & 0x07;
if(0 == idx)
val = buf[(bit >> 3)];
crc ^= 0x8000 & (val << (8 + idx));
crc = (crc & 0x8000) ? ((crc << 1) ^ CRC16_NRF24_POLYNOM) : (crc << 1);
}
return crc;
}