setting frequency in axepad

[axegrinder]

hi peops

Using linAXEpad 0.1.4 i am successfully downloading programs into my 28x in a project board but i cannot download into my project that has a 16mhz resonator in it.

is this a limitation with axepad or is there a setting i am missing

Malcolm

 

[axegrinder]

frequency of resonator

Jut changer resonator and could download to chip. give me a problem as i would like to use faster resonator and down load to picaxe without having to open up project. at least i know my circuit is good.

Malcolm

 

[hippy]

Yes, this is a limitation of AXEpad, it only supports download to 28X and 40X at 4MHz.

Either run the 28X with a 4MHz resonator, or switch resonators for downloading. It may be possible to use a DPDT switch to make change-over easier. Using a SPDT switch and two-leg crystals should also work, it did for me with old Motorola 6800 hardware ...

        .---------.------.----------> XI
      __|__       |     _|_
4MHz  --.--       O     -.- XpF
        |       /        |
        }------O         }----.
      __|__              |   _|_ 0V
8MHz  --.--       O     _|_
        |         |     -.- XpF
        `---------^------^----------> XO

Alternatively, the best course may be to upgrade to the PICAXE-28X1 or 28X2.