Using 3D Printer LCD module RGB MiniLCD12864V3 Part 4 Test App

Using 3D Printer LCD module RGB MiniLCD12864V3 Part 4 Test App

 


 

Now we can use all parts in the module.

1 Part1 Intro introduction to the module pros and cons and ribbon cable pin definition.

2 RGB backlight  enabling the RGB backlight for the LCD screen
3 Part2 using LCD with SPI and U8G2  LCD wire connection, SPI setting, and using U8G2 lib to draw on the LCD.
4 Part3 Using the rotary encoder  
also use beeper and buttons.
 
Now we can make "full" use of this lcd module, except for the SD card, I guess this can wait, since not many DIY project really need a SD card...
With all these feature enabled, we now can make a test app.

Test App to do list:

  • Press any button, buzzer beeps.
  • To use rotary encoder to change the LCD RGB backlight, and apply to the LCD backlight.
  • Make a simple GUI on the LCD screen, make it work with the rotary encoder.
Video
https://youtu.be/t1N9a9b_4fA
 
Source code
https://github.com/ntchris/stm8_stm32/tree/master/bluepill_makerbase_miniLCD12864_v3



Comments

Post a Comment

Popular posts from this blog

STM32 and U8G2 to draw on LCD12864 Using hardware SPI

Image
STM32 bluepill and U8G2 to draw on LCD12864 Using hardware SPI   Since there are not a lot of info about this on Internet, so I am making this guide. We can see some info/guide or example about using Arduino board, or Arduino IDE, or Software SPI to draw using U8g2. But in this guide, we will use hardware SPI, Stm32 chip, and use Stm32CubeIDE to draw. Keyword here: Bluepill, blackpill, u8g2, LCD12864(5V, works with 3.3V stm32 MCU), hardware SPI communication, Stm32CubeIDE.  Part List in the test: LCD12864 screen, Bluepill dev board(stm32F103C8T6) or Blackpill dev board( stm32F401CCU6), 5V power supply, stlinkV2 device to flash or debug.   Low cost LCD12864 (ST7920), it's large, and good resolution(128X64), cheap. It has a lot of pins for parallel connection, DB0 DB1 DB2...DB7, but who has so many pins to connect?? In fact, this LCD can support SPI connection, it only need 2pins to MCU: MOSI and SCK, CS and RESET is optional, no need to connect to MCU.   In SPI mode, pin usage: Pin
Read more

Using STM32 DMA to speed up hardware SPI and U8G2 - Attempt 2 - buffered DMA

Image
Using STM32 DMA to speed up hardware SPI and U8G2 - Attempt 2 - buffered DMA So we have tried the simple DMA method, simple DMA method which doesn't work, let's try another way. In this test, we will cache everything the u8g2 trys to send to the LCD screen over SPI, then we will find a good chance to send the whole huge buffer to LCD using SPI DMA. Step 1 store data to our buffer define a function to be put inside the SPI back function for message U8X8_MSG_BYTE_SEND. cache_spi_data_to_buffer_for_dma_u8g2_callback this function doesn't send anything at all, it only cache the data into our DMA buffer. Since STM32 bluepill has 20kb and blackpill has more, so it's easy for us to spare 2.65KB for u8g2 and LCD DMA buffer. According to my tests so far, every time we call u8g2 sendbuffer() function, all the accumulated data before the last EndTransfer call, the total transmitted size is 25XX, so 2.65KB should be enough for our buffer size. Step 1.1 In this store and cache f
Read more

DIY Weller Solder Tweezers Controller

Image
DIY Weller Soldering Controller for desoldering tweezer Project Objectives: Make a low cost soldering station for Weller solder tweezers.  Finished product: Background: I so happen to have a used Weller desoldering tweezers, obviously I can't use it by itself, so I thought about buying a weller soldering station, oh, the price is surprisingly high, a few hundred dollars to one thousand dollars....so, buying is not an option, not to me.    So I did some investigation, and realized that making our own DIY weller soldering controller is really not that difficult. There are already some people did that, and there are some useful information about the handle schematics and thermocouple info. However some of their design choices could be better. Anyway, let me make one, with some awesome features. Feature List: A nice display of LCD screen1602 (16 characters , 2 lines). It's just about $3 dollars, use I2C to communicate to host MCU. It should show target temperature, current temperat
Read more