Horizontal Addressing Mode

[sdwood68]

Hello, I've been playing around with your driver for a few days and was very happy to get it working quickly.
I see you set up the device for Horizontal Addressing Mode.
27 this->sendCommand(SSD1309_setMemoryAddressingMode);
28 this->sendCommand(0x00);
But when you actually send the data you're using Page mode.
161 void SSD1309::display(unsigned char data)
162 {
163 if(data == nullptr) data = this->buffer;
164 for(uint8_t i = 0; i < this->height/8; i++) {
165 this->sendCommand(0xB0 + i);
166 this->sendCommand(0x00);
167 this->sendCommand(0x10);
168 this->sendData(&data[this->widthi], this->width);
169 }
170 }
Were you ever able to get horizontal addressing mode working where you write the entire buffer to the display in one go?
I really need this so I can implement the display refresh via a DMA transfer to the I2C hardware to free up processing time.

Thanks,

Stuart

[mbober1]

Hi, I'm glad to hear that my old work may still be useful to someone. Unfortunately I don't have time to read the SSD1309 datasheet again. I'm pretty sure my SSD1306 library has a better implementation because it was prepared for DMA (it was never finished).

https://github.com/mbober1/RPi-Pico-SSD1306-library/blob/16c2e233bdddae7016b144ab3a3366e0e815545c/SSD1306.cpp#L177

They should be very similar.

[sdwood68]

Marcin, Thank you for your reply. I looked over your code and updated mine to reflect the changes, but I still get a garbled display when writing the entire frame buffer in one call to sendData. If I send it as pages as your original code 1309 code it works fine, even if I don't reconfigure the memory mode back to page. I've been scouring the SSD1309 datasheet version 1.1 and can not find a reason why it doesn't work. Any suggestions would be appreciated! Stuart

…

________________________________ From: Marcin Bober ***@***.***> Sent: Sunday, February 11, 2024 6:15 AM To: mbober1/RPi-Pico-SSD1309-library ***@***.***> Cc: Stuart Wood ***@***.***>; Author ***@***.***> Subject: Re: [mbober1/RPi-Pico-SSD1309-library] Horizontal Addressing Mode (Issue #1) Hi, I'm glad to hear that my old work may still be useful to someone. Unfortunately I don't have time to read the SSD1309 datasheet again. I'm pretty sure my SSD1306 library has a better implementation because it was prepared for DMA (it was never finished). https://github.com/mbober1/RPi-Pico-SSD1306-library/blob/16c2e233bdddae7016b144ab3a3366e0e815545c/SSD1306.cpp#L177 They should be very similar. — Reply to this email directly, view it on GitHub<#1 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AAYE6HRNVPU7UIJTTR67C4DYTCR3XAVCNFSM6AAAAABDDDS3QKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTSMZXGU4DSMRUGQ>. You are receiving this because you authored the thread.Message ID: ***@***.***>