Aria 10 LCD I2C address - Aria 10 LCD I2C address Hi, We are trying to figure out a way to send some display characters to the LCD and cannot find the I2C address in the manual. Could someone tell us how to find it? Thanks! Replies: Re: Aria 10 LCD I2C address Hi Yong Chi, To clarify further, The LCD can on after the display on cmd is sent right? If LCD display on is working, compare the data signal with LCD display off considering the acknowledge bit for address and cmd. From here maybe can tell the problem. Thanks. Regards, Aik Eu Replies: Re: Aria 10 LCD I2C address LCD is on, but we can't turn display off or make it to show anything. It's not responding to any cmds. Replies: Re: Aria 10 LCD I2C address Hi Yong Chi, As I understand from your previous attempts, seems like you are able to turn on the LCD with the Turn on display cmd with the correct I2C address. Your I2C address will be acknowledged in the signal if it is a correct address. I am thinking if you are able to turn on the LCD, the cmd to turn off the LCD should work as well. Or only the cmd to turn on the LCD working? Thanks. Regards, Aik Eu Replies: Re: Aria 10 LCD I2C address Hi, LCD is still not responding, I think there may be something wrong with our i2c master. Is there an i2c ip that we could utilize to further investigate our design? Thank you, Yong Replies: Re: Aria 10 LCD I2C address Hi Yong Chi, I will close-pending this case at the moment since the LCD char display is responding to the address given. Do open a new thread for further enquiries. Thanks. Regards, Aik Eu Replies: Re: Aria 10 LCD I2C address Hi Yong Chi, I would like to try the below: Can check the below sequence and observe the respond: display on(0x41) -> add some delay to see display is on ~10seconds -> then only display off(0x42). This is to make sure it is responding to any basic cmds if the lcd can be turn on and then it can be off after 10 seconds. display on(0x41) -> add some delay again ~2seconds -> then set Home Cursor(0x46) -> then turn on underline cursor (0x47). This is to verify you can see any cursor appear before sending any ascii characters. Feedback your observation to me after this. Thanks. Regards, Aik Eu Replies: Re: Aria 10 LCD I2C address Hi, So we are going off of this sending sequence: start -> address -> r/w -> ack -> display on -> ack -> clear screen -> ack -> cursor home -> ack -> H -> ack -> and so on...-> ack -> stop but our lcd is still not responding. It seems like it's communicating to the address but nothing is displayed. here is the code: module HelloWorld ( input wire clk, // Controller clock input wire rstn, // Controller active low reset inout wire sda_pin_io, // I2C SDA Pin output scl_pin_o // I2C SCL Pin ); reg [7:0] address_n_data_i; // address to write into wire [7:0] rd_data_o; //wont need if uncommented above wire [2:0] req_status_o; //wont need if uncommented above wire io_sda_w; assign sda_pin_io = io_sda_w; reg [15:0] count; wire command_i; reg strb_i; reg rst_ni; reg [7:0] words [0:52]; initial begin words[0] = 8'hFE; // words[1] = 8'h41; // display on, needs 100uS words[2] = 8'hFE; // words[3] = 8'h51; // clear screen, needs 1.5ms words[4] = 8'hFE; words[5] = 8'h46; // set cursor to home, needs 1.5ms words[6] = 8'h48; // H takes 3ms words[7] = 8'h65; // e words[8] = 8'h6c; // l words[9] = 8'h6c; // l words[10] = 8'h6f; // o words[11] = 8'h20; // space words[12] = 8'h57; // W words[13] = 8'h6f; // o words[14] = 8'h72; // r words[15] = 8'h6c; // l words[16] = 8'h64; // d words[17] = 8'h21; // ! words[18] = 8'h20; // space end i2c_master lcd( .address_n_data_i(address_n_data_i), // Address and Data .command_i(command_i), // Command indicate read/write) .strb_i(strb_i), // Qualifier which will Latch inputs .clk_i(clk), // Controller clock .rst_ni(rst_ni), // Controller active low reset .sda_pin_io(io_sda_w), // I2C SDA Pin* .scl_pin_o(scl_pin_o), // I2C SCL Pin .rd_data_o(rd_data_o), // Output data on reads .req_status_o(req_status_o) ); parameter [17:0] max_count = 177; //15+(18*9) always @(negedge clk) begin if(rstn ==0) begin count <= 0; rst_ni <= 0; end else begin count <= (count == max_count)? max_count : count +1; rst_ni <= 1; end end assign command_i = 0; always@(*) begin if (count == 0 || count == max_count) strb_i = 0; if (count == 4) begin address_n_data_i = 8'h28; strb_i = 1; end if (count > 14 && (count%9 == 6)) //case(count%9) address_n_data_i = words[(count/9) -1];//8'b1011_1000; // function set //endcase end endmodule Could you point out what we are doing wrong? I've also attached the i2c_master.v we are using along with the top.v and the clk_divder.v... wave forms onTB seem okay, but nothing is displayed when .sof is run on the aria x board Thanks, Yong Replies: Re: Aria 10 LCD I2C address HI Yong Chi, I think you are getting a display on (0x41) working is a good thing. You havent set the cursor properly yet because you used 0x4A instead of 0x46 for Cursor home. Try Set cursor(0x45) or Cursor home(0x46) first. Then Underline cursor on (0x47) to observe any cursor there. If there is a cursor, you can play with the move cursor left(0x49) or right(0x4A) If I understand correctly, once there is a cursor, you should able to display Characters after that. Refer to the Table of Commands in the datasheet. Tryout different commands to see which one is responding and which one is not. Make your coding short and simple based on which line which works accordingly in sequence. From there, we can know better on how the LCD char display operates. Thanks. Regards, Aik Eu Replies: Re: Aria 10 LCD I2C address Hi, The manual says that the default address is 0x50, but what would the address for the internal register be? Does it go by this? Could you tell me what I am doing wrong with this sending sequence? Screen is on but nothing gets displayed. Thanks, Yong Replies: Re: Aria 10 LCD I2C address Hi @ychi , We do not receive any response from you to the previous question/reply/answer that I have provided. This thread will be transitioned to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you Regards, Aik Eu Replies: Re: Aria 10 LCD I2C address Hi Yong Chi, From my findings, The LCD char display is NHD-0216K3Z-NSW-BBW-V3 Link to the datasheet: https://www.newhavendisplay.com/specs/NHD-0216K3Z-NSW-BBW-V3.pdf The slave address is 0x50 by default. It can be changed to different address with CMD 0x62, refer page 7 from the datasheet. Thanks. Regards, Aik Eu