modbus_get_byte_from_bits(3) Manual Page

uint8_t modbus_get_byte_from_bits(const uint8_t *src, int index, unsigned int nb_bits);

The modbus_get_byte_from_bits() function shall extract a value from many bits. All nb_bits bits from src at position index will be read as a single value. To obtain a full byte, set nb_bits to 8.

The function shall return a byte containing the bits read.

modbus_set_bits_from_byte(3) modbus_set_bits_from_bytes(3)

The libmodbus documentation was written by Stéphane Raimbault <stephane.raimbault@gmail.com>