MKS MINI 12864 on a RUMBA

SlickNickeL

I am switching Firmware To Repetier.
MKS MINI and RUMBA worked perfectly with MARLIN, but Marlin doesn't support 3 head Ditto Printing for industrial printing/manufacturing.

Does anyone have the correct settings?

Repetier

Isn't it compatible with reprapdiscount graphic display?

SlickNickeL

Nope! Might have something to do with having to enabling the mini- driver in uiconfig.h and the DOGLCD CS, DOGLCD A0.
I've tried several combinations but no success.
Repetier is laid out differently than Marlin, so I'm struggling with the location for inserting the fix that was done on Marlin.
I have a backlight only, so I'm close. I think it's pin 38 and 41 that are the problem but I don't know how or where to address this.

Repetier

Check DisplayList.h there each display has it's configs - often divided in board if known by us. So if you have a display with same chipset all you need to do is tweak the pin numbers. uiconfig.h has more detailed description what each parameter does.

SlickNickeL

Haven't figured this out at all. Tried bunches of stuff, but I'm not a programmer.
How can I transfer settings from Marlin to Repetier? I have no idea what goes where. This may be easy for you, but it's not for me. I was able to do the Marlin fix, but I'm lost in Repetier.

SlickNickeL

Who has a Rumba using Repetier and a MKS MINI LCD?

someone out there has the settings.

SlickNickeL

I have a backlit white screen.
2. Kill pin, SD Card, buzzer, dial selection encoder key with push to select all work.
3. U8lib must be working, because I can blindly rotate and select an underlying menu selection, push encoder and the printer reacts.

I just can't get the LCD to show.
Contrast or refresh setting?
Wrong pins but which ones and where do they need to be set?

Repetier

I found this
https://reprap.org/wiki/MKS_MINI_12864<br/><br/>There they say like RRD Graphic Controller and we already have that with

#elif MOTHERBOARD == 80 // Rumba has different pins as RAMPS!
#undef BEEPER_PIN #define BEEPER_PIN 44 #define UI_DISPLAY_RS_PIN 19 #define UI_DISPLAY_RW_PIN -1 #define UI_DISPLAY_ENABLE_PIN 42 #define UI_DISPLAY_D0_PIN -1 #define UI_DISPLAY_D1_PIN -1 #define UI_DISPLAY_D2_PIN -1 #define UI_DISPLAY_D3_PIN -1 #define UI_DISPLAY_D4_PIN 18 #define UI_DISPLAY_D5_PIN 38 #define UI_DISPLAY_D6_PIN 41 #define UI_DISPLAY_D7_PIN 40 #define UI_ENCODER_A 12 #define UI_ENCODER_B 11 #define UI_ENCODER_CLICK 43 #define UI_RESET_PIN 46
Please try this as it uses the right pinout. Do not confuse the the reprapdiscount 20x4 display whcih is definitely not compatible.

If it does not work, I need to know the graphic chip the display uses.

SlickNickeL

The above pinout is already set as above.
the U1 Chip on the back of the MKS MINI 12864 has the markings as follows:
74HC405
CMD67
TnD1624B
NXP

SlickNickeL

This thread is for Marlin, but it looks as if someone here tried to use this on Repetier.
This is the best thread to figure this out IMO.

Makerbase MKS MINI12864 v1.0 with RAMPS_14 Configuration Marlin 1.1 #6847

SlickNickeL

One thing at a time.
I have selected:
Uiconfig.h
#define U8GLIB_ST7920

What is:
// UI_DISPLAY_RS _PIN = CS
// UI_DISPLAY_D5_PIN = A0

can someone explain what this is for? I think it's for the MKS MINI

Repetier

CS is chip select pin. You have that also in marlin. For the ST920 chip (which is what reprapdiscount graphic controler also uses) you need these pins set correctly

// SCK Pin: UI_DISPLAY_D4_PIN // Mosi Pin: UI_DISPLAY_ENABLE_PIN // CD Pin: UI_DISPLAY_RS_PINLeft is function right is which name gets it. Not very intutive I know, the firmware names come from charater displays and these had the right pin numbers for RRD display so we refunctioned them for u8glib.

// ST7920 with software SPI #define U8GLIB_ST7920 // SSD1306 with software SPI //#define U8GLIB_SSD1306_SW_SPI // SH1106 with software SPI // U8GLIB_SH1106_SW_SPI // SSD1306 over I2C using hardware I2C pins // #define U8GLIB_MINI12864_2X_SW_SPI //#define U8GLIB_SSD1306_I2C // For the 8 bit ks0108 display you need to set these pins // UI_DISPLAY_D0_PIN,UI_DISPLAY_D1_PIN,UI_DISPLAY_D2_PIN,UI_DISPLAY_D3_PIN,UI_DISPLAY_D4_PIN,UI_DISPLAY_D5_PIN,UI_DISPLAY_D6_PIN,UI_DISPLAY_D7_PIN // UI_DISPLAY_ENABLE_PIN,UI_DISPLAY_CS1,UI_DISPLAY_CS2, // UI_DISPLAY_DI,UI_DISPLAY_RW_PIN,UI_DISPLAY_RESET_PIN //#define U8GLIB_KS0108 //#define U8GLIB_KS0108_FAST // UI_DISPLAY_RS_PIN = CS // UI_DISPLAY_D5_PIN = A0 //#define U8GLIB_ST7565_NHD_C2832_HW_SPI
You may only use one of these defines. It tells u8glib which driver to use and that must match the midi display driver, which is why I asked. But your infos did not help here. U8GLIB_MINI12864_2X_SW_SPI might be the right from the name, but that is often misleading.

SlickNickeL

I found this but didn't work/ didn't know how it all works

SlickNickeL

GarrethX commented May 25, 2017 • <div><div>edited

</div></span></h3></div>

<blockquote>I did run across a thread where they were able to get the MIN12864 to work. The nasty is they did hardware mods to the LCD. Sure hope it doesn't come to that.

My HW mod is just required for DUE, as the HWSPI in u8glib v1 for that display is not working at 32 bits:)
At rumba I managed to run this display with HWSPI, and I guess any 8bit will work, just you need correct pins..I even found an old code I used for rumba (not in 3d printer firmware, just one of my projects needed a temporary display:) ), I used there simply:

#define UI_DISPLAY_DOGLCD_CS 38
#define UI_DISPLAY_DOGLCD_A0 41
U8GLIB_MINI12864 u8g(UI_DISPLAY_DOGLCD_CS, UI_DISPLAY_DOGLCD_A0,U8G_I2C_OPT_NONE);

And SD card:

#define SDSS 53
 SD.begin(SDSS);

SlickNickeL

I found this in Marlin
#if (MINIPANEL)
#define DOGLCD
#define ULTIPANEL
#define DEFAULT_LCD_CONTRAST 17

Repetier

Ok, your test project helps more then Marlin here. In ui.cpp we init displays and have

#ifdef U8GLIB_MINI12864_2X_SW_SPI u8g_InitSPI(&u8g, &u8g_dev_uc1701_mini12864_2x_sw_spi, UI_DISPLAY_D4_PIN, UI_DISPLAY_ENABLE_PIN, UI_DISPLAY_RS_PIN, UI_DISPLAY_D5_PIN, U8G_PIN_NONE); #endif #ifdef U8GLIB_MINI12864_2X_HW_SPI u8g_InitHWSPI(&u8g, &u8g_dev_uc1701_mini12864_2x_hw_spi, UI_DISPLAY_RS_PIN, UI_DISPLAY_D5_PIN, U8G_PIN_NONE); #endif
So comparing the parameter you need to define#define U8GLIB_MINI12864_2X_HW_SPI#define UI_DISPLAY_RS_PIN 38 // CS pin#define UI_DISPLAY_D5_PIN 41 // A0 pin
to get that driver. Assuming you use the hardware spi channel. OYu confused me about the due stuff as you always talked about rumba. So pins are taken from your rumba example.

SlickNickeL

Nope, didn't work

Repetier

Did you comment the other display and set display type as user defined? Not that you are not using the config at all.
As a test you can add there
#error Im used
and if it stops compiling you know it is at least using the configuration from uiconfig.h and not from DisplayList.h

SlickNickeL

I believe <a rel="nofollow" target="_blank">#ifdef</a> U8GLIB_MINI12864_2X_SW_SPI is for a two row, small LCD

Repetier

No, they are all for graphic displays. 12864 means 128 pixel by 64 pixel. The typical size for the small lcd displays. HW_SPI is hardware spi and SW_SPI is for software SPI, which would also require pins for clock and mosi pin. But in your example you did not use them so I assume you are using the hardware spi pins here.