Geeetech

Posted: **Sat Jun 13, 2020 8:40 pm**

Hi _kaktus_ I have to agree with colcolo... this schematic is not readable

Any chance you could get readable (higher resolution) version, maybe even original PDF...

I have finally managed to flash my GTM32 Rev B using ST-Link, now I just need correct pinouts to make it run properly!

EDIT: I have had some success with reverse-engineering the pinout...

Code: Select all

#define LCD_PINS_RS                     PA13   // CS chip select /SS chip slave select
    #define LCD_PINS_ENABLE                 PC7  // SID (MOSI)
    #define LCD_PINS_D4                     PD1   // SCK (CLK) clock
    #define LCD_PINS_D5                     PD4
    #define LCD_PINS_D6                     PD5
    #define LCD_PINS_D7                     PD7

See attached picture... looks like some adjustments are still necessary

EDIT: I have figured out proper pins now:

Code: Select all

    #define LCD_PINS_RS                     PA12  // CS chip select /SS chip slave select
    // RW is hardwired to VSS
    #define LCD_PINS_ENABLE                 PC7   // SID (MOSI)
    #define LCD_PINS_D4                     PD1   // SCK (CLK) clock
    #define LCD_PINS_D5                     PD4
    #define LCD_PINS_D6                     PD5
    #define LCD_PINS_D7                     PD7

Posted: **Tue Jul 28, 2020 12:05 am**

TheDuke wrote: Sat Jun 13, 2020 8:40 pm Hi _kaktus_ I have to agree with colcolo... this schematic is not readable

Any chance you could get readable (higher resolution) version, maybe even original PDF...
...

Hello

If you are still working on this topic, please contact me at kaktus_j_p@o2.pl.

Posted: **Tue Nov 30, 2021 4:30 am**

Hello, i am woring on this board.

GEEETECH GTM32_REV_B
REVERSE ENGINEERING BY EDUARDO LAVRATTI

X dir - 67 PA8
X step - 77 PA15
X ena - 84 PD3

Y dir - 96 PB9
Y step - 95 PB8
Y ena - 87 PD6

Z dir - 47 PB10
Z step - 37 PB2
Z ena - 59 PD12

E0 dir - 58 PD11
E0 step - 89 PB3
E0 ena - 60 PD13

E1 dir - 93 PB7
E1 step - 90 PB4
E1 ena - 07 PC13

E2 dir - 36 PB1
E2 step - 33 PC4
E2 ena - 51 PB12

SERIAL COM - 79 PC11
SERIAL COM - 78 PC10

X MIN - 98 PE1
X MAX - 97 PE0

Y MIN - 2 PE3
Y MAX - 1 PE2

Z MIN - 4 PE5
Z MAX - 3 PE4

T_BED - 18 PC3
T_E2 - 17 PC2
T_E1 - 16 PC1
T_E0 - 15 PC0

FAN_0 - 92 PB6
FAN_1 - 70 PA11
FAN_2 - 35 PB0

HETA_0 - 31 PA6
HEAT_1 - 32 PA7
HEAT_2 - 24 PA1
H_BED - 23 PA0

beep - 91 PB5

display pins - need confirmation
64 PC7 ??? LCD_PINS_ENABLE
71 PA12 ??? LCD_PINS_RS

?? ??? ??? LCD_PINS_D4
85 PD4 - ??? PCD_PINS_D5
86 PD5 - ??? LCD_PINS_D6
88 PD7 - ??? LCD_PINS_D7

81 PD0 - ???
91 PB5 - ???
63 PC6 - ???

Geeetech

GTM32 Rev B Board Schematic?

Re: GTM32 Rev B Board Schematic?

Re: GTM32 Rev B Board Schematic?

Re: GTM32 Rev B Board Schematic?