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makerbase-mks / MKS-SGEN_L-V2

MKS SGEN_L V2.0 is powerful 32-bit 3D printer control board. The CPU is LPC1769 120MHZ, SGEN_L V2 hardware Integrated 4KB EEPROM, 5AXIS and dual Z interface, has 2 way FANs and Dc12/24V out interface, support TMC UART and SPI mode...
https://www.aliexpress.com/item/4001283346331.html?spm=a2g0o.store_home.slider_165457030.0
GNU General Public License v3.0
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Is "LED1-4" PIN SET tied to the BOARD STATUS LEDs ? #21

Closed NeoMod closed 4 years ago

NeoMod commented 4 years ago

Looking at the pinout, one of the advantages of this board was - supposedly - having four dedicated PINs to devote an RGB LED.

Those PINs (P1_18, P1_19, P1_20, P1_21) are labelled as "LED1-4" in the Pinout Scheme, but in the Wiring Scheme they are marked as "Reserved".

Upon testing, I discovered that those PINs are indeed tied to the motherboard status LEDs (bottom left corner, near the USB). These LEDs are not present on the Pinout Scheme, but the silkscreen identifies them exactly like the above.

Empirically defining those pins for an RGB LED shows that they are indeed connected. Assigning a blue led (actually, any led. colour doesn't matter) to the P1_18 pin and thus defining it as STAT_LED in Marlin, shows that this led will keep blinking in sync with the motherboard status led.

Am I getting something wrong? Or those pins are indeed meant as an extension port for the motherboard status LEDs?

mks-viva commented 4 years ago

Hi! LED1,P1_18 use debug led. But you can define LED2-4 pin to other function, because LED2-4 have not function in marlin image image

NeoMod commented 4 years ago

Thanks a lot! I totally missed that scheme. Great, I'll move to P1_19/_20/_21 as suggested for the RGB LED, and now since I know about P1_18 I'll probably use it to have a status indicator outside the printer frame. Thanks again for your help. 👍

mks-viva commented 4 years ago

Ok! We will submit this functional requirement to marlin and Using the RGB function will become easy on SGEN_L V2.