if this is the wrong place sorry it seems the most appropriate?
i am a very slow learner when it comes to things electronic
im adding the shields one by one to my board to construct the h/w environment for the project, so far so good i have 2 shields mounted without any conflicts,
however when it comes to adding the 3rd shield i have hit a conflict.
its a 3.2 tft thats in conflict with a single pin D2 currently used by the bluetooth slave shield v2.1 for SEL
the TFT uses this too for touch irq
am i right in thinking i can just use another digital pin currently unused and modify the constructor from
UTouch myTouch(6,5,4,3,2);
to
UTouch myTouch(6,5,4,3,X); where X is the unused digital pin selected.
further more is there any benefit from using a shield to connect? the shield will need connecting by wire as its designed to be the only shield attached to a board as it covers everything and offers no pass through,
thing is there are components on the shield but i have found pin outs to connect directly to the tft from the mega ??
lists the pinouts and conflicts i have managed to sus so far.
this project will include the shields and boards in the spreadsheet (USB host, B/tooth slave, 3.2" tft w/without shield v1, and a RTC) and in adition some simpler circuits with 4 x SSRs being triggered by pid control , upto 5 ds18b20 1 wire temp sensors, 2 x pwm tp120 dc voltage controllers for 14v dc pumps. all of which should be easily accommodated with the spare gpio pins once the shield/major h.w conflicts have been sorted.
im having a bit of trouble sussing out the pins used by the sainsmart tft shield V1.0 I think they reflect the pinouts i found for the tft itself? tho there is an error with the sd si/so pins being crossed according to my reading, but using m/f dupont cables to attach i can test/fix that easily.
as i said the shield is loaded with a few small smd components, I get the pot for tunning the contrast, but thats not going to us gpio is it its a bridge between gnd and +v
but the pinout info i found here connecting the tft to the board without the tft shield mentions no resistors?? tft pinouts
the usbhost shield has library support to drive a serial lcd display too (hence the lcd? entries in its column,
if the conflicts can be accommodated it might be nice to have a 2ndary lcd display for date/time and scrolling progress warnings..
am i on the right path here?
i can plug in a shield and i can follow a simple circuit diagram, but am stretching the limits of my ability now.
and could use a bit of direction tia.
