Hi,
I didn’t think I would be back this quickly!
Many thanks to everyone who helped before, I was successful in programming the chip to do the simple LED flashing program.
Based on advice / comments / photos from my previous help request I re-built my programming circuit (breadboard) to make it tidier and easier to follow as good practice for more complex circuits, however I now find that again I cannot load a program to the chip.
*** Please note that I was able to download a program to this chip previously ***
My setup is:
* A Windows 7, 64 bit laptop
* An AXE027 USB cable
* An AXE029 Breadboard Cable Adapter
* 08M2 chip
* Breadboard construction
* PE v5.4.2
* I am using 3AA batteries to power the circuit
New annotated circuit photo attached:
Diagnostics carried out so far:
* The laptop recognises the cable;
* I do not see the “Hello” message when I run the terminal at 4800;
* When I do the loopback test with a paperclip the terminal window reflects the text I type in;
* A hard reset hasn’t helped;
* I am getting 4.7v at the chip itself (pins 1-8);
* When I do the USB port test I get 0v / 3v with the led off/on;
* While trying to download to the chip I measure 3v at pin 2 (Serial In) and 0v when no download running;
* In my previous post I had the connectors from pins 2 and 3 of the AXE029 board reversed – this time they are correct. The jumper is at the left hand side, pin 1 goes to ground, pin 2 goes to serial out and pin 3 to serial in. The photo shows this as well.
I am stumped again I’m afraid - what is the next thing to check for?
Any help gratefully received.
Jason
I didn’t think I would be back this quickly!
Many thanks to everyone who helped before, I was successful in programming the chip to do the simple LED flashing program.
Based on advice / comments / photos from my previous help request I re-built my programming circuit (breadboard) to make it tidier and easier to follow as good practice for more complex circuits, however I now find that again I cannot load a program to the chip.
*** Please note that I was able to download a program to this chip previously ***
My setup is:
* A Windows 7, 64 bit laptop
* An AXE027 USB cable
* An AXE029 Breadboard Cable Adapter
* 08M2 chip
* Breadboard construction
* PE v5.4.2
* I am using 3AA batteries to power the circuit
New annotated circuit photo attached:
Diagnostics carried out so far:
* The laptop recognises the cable;
* I do not see the “Hello” message when I run the terminal at 4800;
* When I do the loopback test with a paperclip the terminal window reflects the text I type in;
* A hard reset hasn’t helped;
* I am getting 4.7v at the chip itself (pins 1-8);
* When I do the USB port test I get 0v / 3v with the led off/on;
* While trying to download to the chip I measure 3v at pin 2 (Serial In) and 0v when no download running;
* In my previous post I had the connectors from pins 2 and 3 of the AXE029 board reversed – this time they are correct. The jumper is at the left hand side, pin 1 goes to ground, pin 2 goes to serial out and pin 3 to serial in. The photo shows this as well.
I am stumped again I’m afraid - what is the next thing to check for?
Any help gratefully received.
Jason