Hi,
I have only very little knowledge about audio circuit (amplifier, filter, etc), so please forgive me.

What should be the recommended circuit to connect to the audio output pin (AUDIO_L) on BT815/6 ? So that it can working to play a sound/tone/voice.
and also at the end of the circuit should be connected to a speaker right?
What is the specification of speaker for use with EVE BT815/6 chip?

Thank you.

Hi,
is there application note/user manual/tutorial that describe this approach? I can't find it in the datasheet and the programming guide.

and I also want to ask is BT815/7 support ILITEK 2511 touch controller IC?

Thanks

Hi, I just want to ask if BT815 or BT817 support ATMXT336T touch controller IC?
Will it work if we set the I2C address in REG_TOUCH_CONFIG to 0x40 for ATMXT336T ?
just like we set it to 0x5D for Goodix controller and 0x38 for Focaltech IC.

Thanks

Yes, it turn out to be small bug i missed in my program.
Now it work already, thank you.

I want to use custom font in my application, and I'm following this App Note "BRT_AN_014_FT81X_Simple_PIC_Library_Examples".

In the section 6.2, I got a little confused, when it calculate the raw data address, why the value is negative?

(Address of data in RAM_G) + (Metric Block size) – (32 characters worth of (stride * height))
1000 + 148 – (32*(3*25))
= 1000 + 148 – 2400
= -1252

and then -1252 is fed to BITMAP_SOURCE

API_LIB_BeginCoProList();
API_CMD_DLSTART();
API_CLEAR_COLOR_RGB(0, 0, 0);
API_CLEAR(1,1,1);
API_BITMAP_HANDLE(14);
API_BITMAP_SOURCE(-1252);
API_BITMAP_LAYOUT(L1,3,25);
API_BITMAP_SIZE(NEAREST, BORDER, BORDER, 18,25);
The BITMAP_SOURCE command has 22-bit address as parameter, so -1252 will be 0x3FFB1C after clipped to 22-bit address.
But the RAM_G on FT81x device only from 0x000000 to 0x0FFFFF, it's out of range.
Can help me understand this?

Another thing is, after we set the custom font, and we want to call CMD_TEXT or CMD_NUMBER and use the custom font,
do the character that we use must be included in the converted character in our font?
For example i call CMD_TEXT with text string "abc", but my custom font is in UTF-8 format and i don't have 'a', 'b', 'c' in the converted font index, will it work?

Thank you

Hi,
when using CMD_INFLATE we only provide the "Ptr" which is the destination address in RAM_G, then we write stream of bytes of the compressed image. We don't provide the size (total number of bytes) of our compressed image. So, how does the processor know when it is the end of our stream of bytes?
When write the REG_CMD_WRITE > REG_CMD_READ, then wait for a while, then write again another data, it could be the continuation of byte stream, and it could be a new CMD issued. So how the processor distinguish it?

Another question is after issuing CMD_INFLATE, we want to know the end address in RAM_G that was populated by calling CMD_GETPTR. This command returning the end address of decompressed data, so if we want to decompress another image, then the next address we specify in CMD_INFLATE ("Ptr") shoud be +1 from what we get from CMD_GETPTR?

Hi, so it really depend on the LCD panel that we use.

Is there a LCD panel that only provide pins for CTP for example: supply, gnd, scl, sda, rst, and int
and other LCD panel have many more pins for the CTP function (probably 20-30 pins), what's the different?