Some Question About Inchworm - Electronic Circuits Projects Diagrams Free

Ayne · 5th March 2007, 01:38 PM

I have complete my inchworm assembly kit.

it is giving,
5 Volts on TP+5 And
12.8 Volts on TP VPP.

Now my questions are,

Maximum Length of the cable from Inchworm to Targeted PIC Board???

Maximum Length of the cable from Computer to Inchworm???

What should be the speed of Serial Port(BPS)???

What about connections of serial port?? Straight or cross?? i mean 2 to 2...or .....2 to 3???

Thanks.

**3v0** · 5th March 2007, 01:57 PM

Quote:

Maximum Length of the cable from Inchworm to Targeted PIC Board???
Keep it short as possible.

IIRC 6 inches max.

Quote:

Maximum Length of the cable from Computer to Inchworm???

Not critical. A few feet is OK.

Quote:

What should be the speed of Serial Port(BPS)???

MPLAB allows either 19200 or 57600. The inchworm will detect the rate and work with either.

It takes a non crossed cable. If you have the space you can do without the RS232 cable.

Ayne · 5th March 2007, 02:29 PM

Quote:

Maximum Length of the cable from Computer to Inchworm???

Not critical. A few feet is OK.

I am plaining to use 3 Meter....... What u say???

**3v0** · 5th March 2007, 02:36 PM

Quote:

Originally Posted by Ayne

I am plaining to use 3 Meter....... What u say???

Prior to installation of LAN at the U the math dept had RS232 cables running from one end of the building to another and between floors.

I would not do that to the inchworm.

What I say: get it working first with a short or no cable then give your long one a try.

blueroomelectronics · 5th March 2007, 04:11 PM

Quote:

Originally Posted by Ayne

I have complete my inchworm assembly kit.

it is giving,
5 Volts on TP+5 And
12.8 Volts on TP VPP.

Now my questions are,

Maximum Length of the cable from Inchworm to Targeted PIC Board???

Maximum Length of the cable from Computer to Inchworm???

What should be the speed of Serial Port(BPS)???

What about connections of serial port?? Straight or cross?? i mean 2 to 2...or .....2 to 3???

Thanks.

Most of those questions are answered in the Inchworm assembly manual.

except the RS232 cable length is rated for about 25' max, I'd keep it short for starters about 1 meter till you know its working.

Baud rate is either 19K or 57K (MPLAB)

Ayne · 5th March 2007, 04:47 PM

A problem in another programmer... TAIT Serial Programer.

When i feed firmware into PIC16F877A or any other program(blinking LED)

an error occur..

Quote:

Verify fail at 005 address

I have used this programmer before about 6 months ago that time it was running properly... Now i pick it again from store and run it.

Where is mistake???

What should be VPP voltages???

Why it is saying at 005 adress why not on 000h address???

blueroomelectronics · 5th March 2007, 04:54 PM

Is this an Inchworm or TAIT question?

If its inchworm MPLAB likes to see around 12v to 13v on VPP

If its about TAIT why would you use a TAIT if you have an ICD2 clone?

Ayne · 5th March 2007, 05:03 PM

It is about Tait programmer.

Why i am using TAIT Programmer......
Because as u know a pre programmed Microcontroller is needed to run the ICD therefore i am using TAIT to program "ICD2_Bootloader_A" file into PIC16F877A....

I have seen another a simplest programmer on the web, made with only resistors but i have mis the link....u know?

Ayne · 5th March 2007, 07:23 PM

Which is the best way...

Connecting Serial port to inchwormfirst ??? or connecting supply first???

same question for disconnecting...

Pommie · 5th March 2007, 09:55 PM

The resistor only programmer is here.

I found that you may need a couple of diodes as well. See attachment.

Mike.

**3v0** · 5th March 2007, 10:58 PM

If you are using a purchased kit the 877 should already be programmed.

Ayne · 6th March 2007, 07:13 AM

Once i have programmed PIC16F877A with "ICD2_Bootloader_A"... but ICD is not working it say

Code:

Auto-connect not enabled - Not connecting (Try enabling auto-connect on the ICD2 settings pages.)
ICDWarn0034: Please ensure that your system's serial FIFO buffers are disabled.
Connecting to MPLAB ICD 2
ICDWarn0054:  MPLAB IDE has lost communications with the MPLAB ICD 2.  Would you like to attempt to reconnect?
Connecting to MPLAB ICD 2
ICD0021: Unable to connect with MPLAB ICD 2
MPLAB ICD 2 Ready
Connecting to MPLAB ICD 2
ICD0021: Unable to connect with MPLAB ICD 2
MPLAB ICD 2 Ready
Connecting to MPLAB ICD 2
ICD0021: Unable to connect with MPLAB ICD 2
MPLAB ICD 2 Ready
Connecting to MPLAB ICD 2
ICD0021: Unable to connect with MPLAB ICD 2
MPLAB ICD 2 Ready
Connecting to MPLAB ICD 2
ICD0021: Unable to connect with MPLAB ICD 2
MPLAB ICD 2 Ready

My cable length is 24 inches, straight connections, PIN 1 with PIN 1, 2 with 2.

What should be the setting during programming of PIC16F877A with "ICD2_Bootloader_A"... Picture Below.

My Fifos are also OFF

My Microcontroller(PIC16F877A_ is OK. I feed a program of blinking leds with TAIT programmer and it is working properly..

Ayne · 6th March 2007, 07:16 AM

Quote:

If you are using a purchased kit the 877 should already be programmed.

I am not using a purchased kit... I only have PCB of inchworm of BlueRoom electronics.

Ayne · 6th March 2007, 08:50 AM

Quote:

Originally Posted by 3v0

FWII the easyest way to test the rs232 is with a loop back type test. Remove the PIC and jumper the TX and RX pins at the processor socket Then connect to the Inchworm with any terminal program. If you can see what you type the MAX232 is working. When you remove the jumper you should not see what you type.

I have also done this step on both speeds 57600 and 19200... and have succeed on both speed...

Also have cheked RTS and CTS as i short PORTB.4 with PORTB.5 with jumper.... CTS LED turn on in software, i am using Serial Input Output monitor of PIC CCS compiler.

**3v0** · 6th March 2007, 10:50 AM

I need to better understand what you have done.

When you programmed the 877 to blink a LED did you run it in the inchworm circuit ? If not write code to blink busy LED and check it in inchworm.

Do you have the PIC - MAX232 - DB9 exactly as in the inchworm schematics ? Check this again even if you had the LED blinking.

I think the "serial input/output" is part of the CCS IDE not the compiler. I have the compiler but not the IDE not sure exactly what it does so I do not know what that test proved for sure.

Just for kicks and giggles set MPLAB to auto-connect and to auto download the operating system (to the 877). Then try it.

5th March 2007, 01:38 PM	(permalink)
Ayne Experienced Member	Some Question About Inchworm I have complete my inchworm assembly kit. it is giving, 5 Volts on TP+5 And 12.8 Volts on TP VPP. Now my questions are, Maximum Length of the cable from Inchworm to Targeted PIC Board??? Maximum Length of the cable from Computer to Inchworm??? What should be the speed of Serial Port(BPS)??? What about connections of serial port?? Straight or cross?? i mean 2 to 2...or .....2 to 3??? Thanks.

5th March 2007, 04:54 PM	(permalink)
blueroomelectronics Experienced Member Blog Entries: 4	Is this an Inchworm or TAIT question? If its inchworm MPLAB likes to see around 12v to 13v on VPP If its about TAIT why would you use a TAIT if you have an ICD2 clone? __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com

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5th March 2007, 05:03 PM	(permalink)
Ayne Experienced Member	It is about Tait programmer. Why i am using TAIT Programmer...... Because as u know a pre programmed Microcontroller is needed to run the ICD therefore i am using TAIT to program "ICD2_Bootloader_A" file into PIC16F877A.... I have seen another a simplest programmer on the web, made with only resistors but i have mis the link....u know?

5th March 2007, 07:23 PM	(permalink)
Ayne Experienced Member	Which is the best way... Connecting Serial port to inchwormfirst ??? or connecting supply first??? same question for disconnecting...

5th March 2007, 10:58 PM	(permalink)
3v0 Moderator Blog Entries: 3	If you are using a purchased kit the 877 should already be programmed.

6th March 2007, 10:50 AM	(permalink)
3v0 Moderator Blog Entries: 3	I need to better understand what you have done. When you programmed the 877 to blink a LED did you run it in the inchworm circuit ? If not write code to blink busy LED and check it in inchworm. Do you have the PIC - MAX232 - DB9 exactly as in the inchworm schematics ? Check this again even if you had the LED blinking. I think the "serial input/output" is part of the CCS IDE not the compiler. I have the compiler but not the IDE not sure exactly what it does so I do not know what that test proved for sure. Just for kicks and giggles set MPLAB to auto-connect and to auto download the operating system (to the 877). Then try it.