GTM32 Rev B Board Schematic?

TheDuke
Posts: 6
Joined: Sat Jul 01, 2017 12:54 pm

Re: GTM32 Rev B Board Schematic?

Post by TheDuke » 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
Attachments
IMG_0197.JPG
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_kaktus_
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Re: GTM32 Rev B Board Schematic?

Post by _kaktus_ » 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.
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AGRESSiVA
Posts: 4
Joined: Wed Sep 28, 2016 12:57 am

Re: GTM32 Rev B Board Schematic?

Post by AGRESSiVA » 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 - ???

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