I just bought and received a Junebug. I assembled it over a few nights and finally got it connected. I think the PICkit 2 software upgraded the OS on the 18F2550.
However, I get an error as soon as I start PICkit 2 or attempt any action (reading the tutor PIC etc.). The error reads "PICkit 2 VPP voltage level error. Check target & retry operation". I have attached a screenshot of this.
Between U5V and GND is just under 5V. No difference using a powered USB hub.
I have been through the troubleshooting section of the program a few hundred times now Essentially, with /MCLR ON and VPP tested, a short circuit is detected by the software and VPP is turned off. I have checked the datasheet for the BS250K. With /MCLR OFF, VPP is detected between 11.9 and 12.1V and the test passes. When VPP is on in any MCLR state, there is a high pitched hum/whine from something that can be heard from a few cm away. Does anybody else notice this with their Junebug?
I replaced the 2N7000 with a new one in case (I thought I damaged it during construction). I also removed the BS250K and jumpered between U5V and +5V at Bill's suggestion. No difference and the problem persists without the BS250. The high pitched 'hum' when VPP is on also persists, so it wasn't the BS250.
On the few occasions where I have convinced the Junebug to see the tutor PIC, I cannot program a .hex. I can (twice) read the PIC, but of course it is empty as I just got it! It seems that whatever internal check the software does triggers the VPP error and I have to 'Check Communication' to get the software to talk to the board again.
I am happy to try any tests people suggest with a meter. The BS250 is currently removed and I only have a 180mA replacement, the Junebug manual suggests 250mA. The replacement I bought is: UNBRANDED | BS250-MBR | CPC
Does anybody have any ideas? I've almost given up which is sad as the board is great and I can't wait to start programming.
However, I get an error as soon as I start PICkit 2 or attempt any action (reading the tutor PIC etc.). The error reads "PICkit 2 VPP voltage level error. Check target & retry operation". I have attached a screenshot of this.
Between U5V and GND is just under 5V. No difference using a powered USB hub.
I have been through the troubleshooting section of the program a few hundred times now Essentially, with /MCLR ON and VPP tested, a short circuit is detected by the software and VPP is turned off. I have checked the datasheet for the BS250K. With /MCLR OFF, VPP is detected between 11.9 and 12.1V and the test passes. When VPP is on in any MCLR state, there is a high pitched hum/whine from something that can be heard from a few cm away. Does anybody else notice this with their Junebug?
I replaced the 2N7000 with a new one in case (I thought I damaged it during construction). I also removed the BS250K and jumpered between U5V and +5V at Bill's suggestion. No difference and the problem persists without the BS250. The high pitched 'hum' when VPP is on also persists, so it wasn't the BS250.
On the few occasions where I have convinced the Junebug to see the tutor PIC, I cannot program a .hex. I can (twice) read the PIC, but of course it is empty as I just got it! It seems that whatever internal check the software does triggers the VPP error and I have to 'Check Communication' to get the software to talk to the board again.
I am happy to try any tests people suggest with a meter. The BS250 is currently removed and I only have a 180mA replacement, the Junebug manual suggests 250mA. The replacement I bought is: UNBRANDED | BS250-MBR | CPC
Does anybody have any ideas? I've almost given up which is sad as the board is great and I can't wait to start programming.