Esta é a list de todas as variáveis com links para a estrutura/união a que petencem:

on_complete : TWI_Transaction_t
on_error : TWI_Transaction_t
rx_buf : TWI_Transaction_t
rx_idx : TWI_Transaction_t
rx_len : TWI_Transaction_t
slave_addr : TWI_Transaction_t
state : TWI_Transaction_t
status : TWI_Transaction_t
timeout_counter : TWI_Transaction_t
timeout_limit : TWI_Transaction_t
tx_buf : TWI_Transaction_t
tx_idx : TWI_Transaction_t
tx_len : TWI_Transaction_t