What is the similar code in stm8? HAL_I2C_Mem_Write for ssd1306 i2c

Welcome, @MGhob.1​, to the community!

HAL is a layer of abstraction which is not available for the STM8. So sending a memory block via I2C has to be done manually there, for which you can use the SPL: I2C_Send7bitAddress(), I2C_SendData() etc.

Good luck!

Regards

/Peter

void I2C_sendarray_reg8(uint8_t dev_address, uint8_t reg8_register, uint8_t *data_array, uint8_t datalength)
{
	uint8_t i;
	
	i = 0;
	
	I2C_GenerateSTART(ENABLE);													//startbit
	while(!I2C_CheckEvent(I2C_EVENT_MASTER_MODE_SELECT));						//master-mode?
	
	I2C_Send7bitAddress(dev_address, I2C_DIRECTION_TX);							//write-address-of reg16
	while(!I2C_CheckEvent( I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));		//transmit-mode?
	
	I2C_SendData((uint8_t) reg8_register);										//reg8 register
	while(I2C_GetFlagStatus(I2C_FLAG_TRANSFERFINISHED) == RESET);				//byte is sent?
	
	while (i < datalength)
	{
		I2C_SendData(data_array[i++]);											//send reg16 data byte
		while(!I2C_CheckEvent( I2C_EVENT_MASTER_BYTE_TRANSMITTED));				//byte is sent?
	}
	I2C_GenerateSTOP(ENABLE);													//stopbit
}

you'll have to write it yourself, above is some code as an example.