| | |
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| | | return(crc); |
|---|
| | | } |
|---|
| | | */ |
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| | | const uint16_t crctalbeabs[] = { |
|---|
| | | 0x0000, 0xCC01, 0xD801, 0x1400, 0xF001, 0x3C00, 0x2800, 0xE401, |
|---|
| | | 0xA001, 0x6C00, 0x7800, 0xB401, 0x5000, 0x9C01, 0x8801, 0x4400 |
|---|
| | | }; |
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| | | |
|---|
| | | uint16_t crc16tablefast(const uint8_t *ptr, uint16_t len) |
|---|
| | | { |
|---|
| | | uint16_t crc = 0xffff; |
|---|
| | | uint16_t i; |
|---|
| | | uint8_t ch; |
|---|
| | | |
|---|
| | | for (i = 0; i < len; i++) { |
|---|
| | | ch = *ptr++; |
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| | | crc = crctalbeabs[(ch ^ crc) & 15] ^ (crc >> 4); |
|---|
| | | crc = crctalbeabs[((ch >> 4) ^ crc) & 15] ^ (crc >> 4); |
|---|
| | | } |
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| | | |
|---|
| | | return crc; |
|---|
| | | } |
|---|
| | | |
|---|
| | | //********************************************************************** |
|---|
| | | //****************** Modbus slave ************************************ |
|---|
