Appreciate your response and honesty. Addressing the link you provided, I provide the following information. I have been on this apparently simple task at work for quite some time (since April 12th.), first trying to get a PIC18f458 to operate the display, and because of numerous connectivity and uploading problems, switched to the uno. Fairly new to embedded programming and using forums and the PIC and the arduino; so pardon my non-use of code tags last time around; had to look up what that was. Anyhow, for the program I uploaded , I used the portB 8bit single port sketch I derived from the egs, which compiles; all the sketches when modified, do. I'm getting:
data pin 0 3.1mV
data pin 1 has 4.9volts
other data pins 4.06volts, (logic 1 for activation)
the rs,en pins sit at 4.9volts,
w/r pin at grd, and vss and vdd are at 0 and 5 volts resp......still nothing shows up on the display. I take it digital pins 2->9 represent portB data pins? There seems to be some issue with dpins 0 and 1 unlike the other data pins; I take it these should be high for anything to occur. An interesting thing though; when i take the connector off the back of the display and check the voltages on the arduino they are in the significantly small:
data pin (digpin9)= 0 3.1mV data pin 1 (DP8)= 4.9volts the other data pins are in the hundreds of mV range (less than 1V).
I also uploaded this program to another uno and I got the same scenario, so this could imply that the code itself is generating this occurence on DPin 9.
Additionally, this same vfd worked when using a borland C program with a CIODIO48 board (hence the ribbon) placed within a card slot working in conjunction with the CPU of a windows 98 OS which was shown to me sometime in November of last year, so I know it works.
I'm not sure what next to consider doing to resolve this problem since I'm not quite sure what all the requirements may be in order for the display to respond; I think I've covered everything; can you assist me to get this vfd working? Appreciate.
M.
CODE lcd-vfd display.pdf (131 KB)