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|  | 
| uint32_t | crc_itu32_calc (const uint8_t *buf, int len, uint32_t crc) | 
|  | Calculate the ITU/CCITT CRC-32 value in buffer. 
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|  | 
| int | crc_itu32_append (uint8_t *buf, int len) | 
|  | Append an ITU/CCITT CRC-32 value to a frame. 
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|  | 
| int | crc_itu32_check (const uint8_t *buf, int len) | 
|  | Check the ITU/CCITT CRC-32 value in a frame. 
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|  | 
| uint16_t | crc_itu16_calc (const uint8_t *buf, int len, uint16_t crc) | 
|  | Calculate the ITU/CCITT CRC-16 value in buffer by whole bytes. 
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|  | 
| uint16_t | crc_itu16_bits (uint8_t buf, int len, uint16_t crc) | 
|  | Calculate the ITU/CCITT CRC-16 value of some bits from a byte. 
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|  | 
| int | crc_itu16_append (uint8_t *buf, int len) | 
|  | Append an ITU/CCITT CRC-16 value to a frame. 
 | 
|  | 
| int | crc_itu16_check (const uint8_t *buf, int len) | 
|  | Check the ITU/CCITT CRC-16 value in a frame. 
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|  | 
◆ crc_itu16_append()
      
        
          | int crc_itu16_append | ( | uint8_t * | buf, | 
        
          |  |  | int | len | 
        
          |  | ) |  |  | 
      
 
Append an ITU/CCITT CRC-16 value to a frame. 
- Parameters
- 
  
    | buf | The buffer containing the frame. This must be at least 2 bytes longer than the frame it contains, to allow room for the CRC value. |  | len | The length of the frame. |  
 
- Returns
- The new length of the frame. 
 
 
◆ crc_itu16_bits()
      
        
          | uint16_t crc_itu16_bits | ( | uint8_t | buf, | 
        
          |  |  | int | len, | 
        
          |  |  | uint16_t | crc | 
        
          |  | ) |  |  | 
      
 
Calculate the ITU/CCITT CRC-16 value of some bits from a byte. 
- Parameters
- 
  
    | buf | The buffer containing the byte of data. |  | len | The number of bits, starting from the LSB. |  | crc | The initial CRC value. This is usually 0xFFFF, or 0 for a new block (it depends on the application). It is previous returned CRC value for the continuation of a block. |  
 
- Returns
- The CRC value. 
 
 
◆ crc_itu16_calc()
      
        
          | uint16_t crc_itu16_calc | ( | const uint8_t * | buf, | 
        
          |  |  | int | len, | 
        
          |  |  | uint16_t | crc | 
        
          |  | ) |  |  | 
      
 
Calculate the ITU/CCITT CRC-16 value in buffer by whole bytes. 
- Parameters
- 
  
    | buf | The buffer containing the data. |  | len | The length of the frame. |  | crc | The initial CRC value. This is usually 0xFFFF, or 0 for a new block (it depends on the application). It is previous returned CRC value for the continuation of a block. |  
 
- Returns
- The CRC value. 
Referenced by adsi_tx_put_message(), and hdlc_tx_frame().
 
 
◆ crc_itu16_check()
      
        
          | int crc_itu16_check | ( | const uint8_t * | buf, | 
        
          |  |  | int | len | 
        
          |  | ) |  |  | 
      
 
Check the ITU/CCITT CRC-16 value in a frame. 
- Parameters
- 
  
    | buf | The buffer containing the frame. |  | len | The length of the frame. |  
 
- Returns
- TRUE if the CRC is OK, else FALSE. 
 
 
◆ crc_itu32_append()
      
        
          | int crc_itu32_append | ( | uint8_t * | buf, | 
        
          |  |  | int | len | 
        
          |  | ) |  |  | 
      
 
Append an ITU/CCITT CRC-32 value to a frame. 
- Parameters
- 
  
    | buf | The buffer containing the frame. This must be at least 2 bytes longer than the frame it contains, to allow room for the CRC value. |  | len | The length of the frame. |  
 
- Returns
- The new length of the frame. 
 
 
◆ crc_itu32_calc()
      
        
          | uint32_t crc_itu32_calc | ( | const uint8_t * | buf, | 
        
          |  |  | int | len, | 
        
          |  |  | uint32_t | crc | 
        
          |  | ) |  |  | 
      
 
Calculate the ITU/CCITT CRC-32 value in buffer. 
- Parameters
- 
  
    | buf | The buffer containing the data. |  | len | The length of the frame. |  | crc | The initial CRC value. This is usually 0xFFFFFFFF, or 0 for a new block (it depends on the application). It is previous returned CRC value for the continuation of a block. |  
 
- Returns
- The CRC value. 
Referenced by hdlc_tx_frame().
 
 
◆ crc_itu32_check()
      
        
          | int crc_itu32_check | ( | const uint8_t * | buf, | 
        
          |  |  | int | len | 
        
          |  | ) |  |  | 
      
 
Check the ITU/CCITT CRC-32 value in a frame. 
- Parameters
- 
  
    | buf | The buffer containing the frame. |  | len | The length of the frame. |  
 
- Returns
- TRUE if the CRC is OK, else FALSE.