I have been doing some firmware and hardware tinkering on my RepRapPro Huxley machine which is controlled by a Sanguinololu board (V1.3) and come across something which I have not seen documented anywhere - at least I think I have and would like some sanity confirmation please.
The heated bed on the RRP Huxley is not controlled via the onboard MOSFET designed for that purpose on the Sanguinololu board - this is commonly used to control an external fan. The RRP Huxley has a heated bed which has its own MOSFET and requires a digital output from the expansion header on the Sanguinololu board. Up until now, I have used D10 for this purpose but as my tinkering required the use of the Rx and Tx pair (D10 / D11) on the expansion header, I wanted to move to a different control pin for my heated bed.
What I have discovered is that the pin marked D12 on the Sanguinololu board is actually D4 meaning that the pin labelling on my board: 12V, 5V, D12, D11, D10, D17, D16 is wrong and that the sequence should read: 12V, 5V, D4, D11, D10, D17, D16
Can anybody else confirm this? If it is documented elsewhere, sorry but as said, I could not find any reference to it.
Taking the bull by the horns, I set my firmware according to my findings as above and all seems fine and dandy - my bed is now controlled by D4 in MARLIN PINS.H yet connected to the pin marked D12 on the Sanguinololu PC board.
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Alan
The heated bed on the RRP Huxley is not controlled via the onboard MOSFET designed for that purpose on the Sanguinololu board - this is commonly used to control an external fan. The RRP Huxley has a heated bed which has its own MOSFET and requires a digital output from the expansion header on the Sanguinololu board. Up until now, I have used D10 for this purpose but as my tinkering required the use of the Rx and Tx pair (D10 / D11) on the expansion header, I wanted to move to a different control pin for my heated bed.
What I have discovered is that the pin marked D12 on the Sanguinololu board is actually D4 meaning that the pin labelling on my board: 12V, 5V, D12, D11, D10, D17, D16 is wrong and that the sequence should read: 12V, 5V, D4, D11, D10, D17, D16
Can anybody else confirm this? If it is documented elsewhere, sorry but as said, I could not find any reference to it.
Taking the bull by the horns, I set my firmware according to my findings as above and all seems fine and dandy - my bed is now controlled by D4 in MARLIN PINS.H yet connected to the pin marked D12 on the Sanguinololu PC board.
Alan