void TM_I2C_Write2(I2C_TypeDef* I2Cx, uint8_t address, uint8_t command) {
    TM_I2C_Start(I2Cx, address, I2C_Direction_Transmitter, 0);
    TM_I2C_WriteData(I2Cx, command);
    TM_I2C_Stop(I2Cx);
}

//Usage
TM_I2C_Init..
TM_I2C_Write2(0x80, yourcommand);