VDI-RODERICO

[kroman01]

it works! After connecting to the LCD DB0-DB3 it was still necessary to connect the R / W on my PCB there is an error R / W is shorted to GND
I will write tests how it works during the weeken
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great project .. words of appreciation .. LCD backlight works under SW3 just as I wanted
Regards

[roderico]

I see from the last two pictures that you do not connect all LCD pins as in the schematics, i.e. it looks like that there are some pins that are not connected to the pcb, if it is so it won't work becasue this version drives the LCD in 8-bit mode for lower latency since there was enoungh free pins in the pic16f886, could you connect all the pins of the LCD as in the schematics and try again?

[kroman01]

LCDs that I have do not require RT1 enough one 2k resistor to GND .. but I connected RT1 to the contrast on the pins .. this display worked well with previous VDI on PIC16F690 .. on the pictures you can see when PIC16F886 clean and programmed
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R1 and R2 have changed values, it is a voltage divider for measuring BAT voltage, such values have been checked in an earlier version of VDI on PIC16F690

[roderico]

very nice pcb, I guess the problem is related to the lcd connections (e.g. lcd contrast), you don't have any measurements in the external oscillator because it is not used (you could have saved the components but it won't stop the vdi for working), would it be possible for you to attach an image like VDI.jpg or VDI_.jpg but with the components labels, i.e. R1, R2, etc for an easier comparison with the schematics?

[kroman01]

I programmed again using PICKIT3 and MPLAB IPE as well as JDM and WinPICPgm and each time the same ... you can see that it runs, but the lack of content on the screen I designed PCB based on the scheme may be an error in the diagram

[kroman01]

I will program it again ... this is what my PCB looks like

[roderico]

in the log file you copied I cannot see any message where the test firmware is loaded, if you are using MPLAB IPE after connecting the device you need select the firmware where it says "source" and then push program... I tested it with a pic16f886 I have and it worked fine, however I haven't tested it on the fields, could you try again and/or if you already managed to program it could you show your pcb?

[kroman01]

measurements showed that the V1 oscillator does not work

[kroman01]

I made a record, but it does not work when I program PIC16F886 ... result

Connecting to MPLAB PICkit 3...


Currently loaded firmware on PICkit 3
Firmware Suite Version.....01.51.06
Firmware type..............Midrange


Target voltage detected
Target device PIC16F886 found.
Device ID Revision = 2
2018-08-04 11:56:29 +0200 - Erasing...


Erasing...
Erase successful
2018-08-04 11:56:33 +0200 - Erase device complete


2018-08-04 11:56:37 +0200 - Blank checking...


Blank Checking...
Blank check complete, device is blank.
2018-08-04 11:56:42 +0200 - Device is blank


2018-08-04 11:56:46 +0200 - Programming...


Device Erased...


Programming...


The following memory area(s) will be programmed:
program memory: start address = 0x0, end address = 0x17ff
configuration memory
EEData memory
Programming/Verify complete
2018-08-04 11:56:59 +0200 - Programming complete
Pass Count: 66


2018-08-04 11:57:03 +0200 - Verifying...


Verifying...


The following memory areas(s) will be verified:
program memory: start address = 0x0, end address = 0x1fff
configuration memory
EEData memory
User Id Memory


EEData memory
Address: 0 Expected Value: 1 Received Value: 0
Verify failed
2018-08-04 11:57:11 +0200 - Verify failed

[kroman01]

great, ordered PIC16F886 and PIC18F25K22 should be next week, I will try to do and test in my IDX

[roderico]

this is a test firmware that was missing for PIC16F886 with a LCD, I added the following changes:

- VDI lower and upper limits for each VDI interval
- backlight control (on/off/SW3/ 0 < VDI < VDI_upper_limit)
- change style of strength bars for better readability

to test it with the sample pcb:

- Y1, C12, C13 are not necessary for PIC16F886
- short R15 for LCD contrast to work
- pins VEE, CS1, CS2 and RST are not used for LCD
- 78L05, R11 and Q1 depend on the LCD model
- SW4 (for reset) and the pin header (ICSP) are optional

[roderico]

also PIC18F2520/2523 would be fine but preferably PIC18F25K22 (no need to say that they will also work with the LCD)

[roderico]

if you are going to buy a new one you better buy a PIC18F25K22 without any doubt, PIC18F252 is not in production only in case you already have one

[kroman01]

good for GLCD will be better available PIC18F25K22 and cheaper as PIC18F252

[roderico]

95% of the code can be reused and you don't need to rewrite the program for every new model, only the specific part. PIC16F886 is in production and it is quite cheap, it would not make much sense to buy a pic with 128KB when you only need 14KB, for a GLCD I would say any pic with 32KB would be sufficient, e.g. PIC18F25K22, however an old model as the PIC18F252 would also work very well... it depends on the availability of the chips and the particular problem