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1 To recompile the OSTC code you will need to install the following:
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2 ------------------------------------------------------------------
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3
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4 - A Mercurial client, to download the source code and updates easily.
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5 TortoiseHg is free, and works well.
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6
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7 - The Microchip MPLab IDE. This is free, and enable to recompile
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8 all the assembly code, link, and produce a .hex file.
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9
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10 - If you want to modify the decompression algorithm, you will also
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11 need the MPLab C18 compiler. There is a demo free for the first
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12 30 days.
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13 If you don't modify p2_deco.c, you don't need the C18 compiler,
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14 see below.
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15
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16 - The Tiny bootloader for windows, see the HW site.
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17
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18
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19 Creating a working project:
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20 ---------------------------
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21
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22 - Launch the MPLab IDE.
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23
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24 - Create a new project (Project > Project Wizard...)
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25 - Choose device PIC18F4685
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26 - Select Microchip C18 Toolsuite (if you installed the C18 compiler)
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27 or Microchip MPASM Toolsuite (if not)
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28 --> Make sure the paths are corect.
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29 - Choose a name and a directoty.
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30
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31 - Add the following files:
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32 <my_source_path>/code_part1/OSTC_code_asm_part1/18f4685_ostc_mkII.lkr
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33 <my_source_path>/code_part1/OSTC_code_asm_part1/MAIN.ASM
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34 <my_source_path>/code_part1/OSTC_code_c_part2/p2_deco.o
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35
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36 (or use the .c instead of the .o if you have the C18 compiler)
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37
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38 - If you want to compile C code, configure it:
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39 Project > Build Options... > Project > MPLab C18
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40 General: Default storage = Overlay (-sco)
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41 Optimization: Enable all
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42
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43 - Hit F10 to recompile everything.
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44 --> You should get a .hex file where you saved your project.
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45
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46
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47 Installing the new firmware
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48 ---------------------------
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49
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50 - Get the .hew file you want to flash onto the OSTC.
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51
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52 - Connect the OSTC, wake it up.
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53
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54 - Launch the Tiny bootloader. It should work for some time, trying to open
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55 the communication port.
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56
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57 - Once it is ready, Click Browse to select the .hex file
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58 ==> DO NOT HIT Write Flash YET !
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59
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60 - On the OSTC, go to the reset menu, select Reboot OSTC
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61 ==> DO NOT CONFIRM YET !
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62
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63 - Click "Write Flash" button. Now you have 10sec to confirm on OSTC too.
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64
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65 - The bootloader should say it found a 18F6485 device, and start uploading.
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66 The OSTC should have the blue and red led blinking rapidly.
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67 The upload time is ~ 20 secondes.
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68
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69 - Once done, the OSTC finishes its reboot.
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70
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71 - If you OSTC is stuck in some bad code, you can do the magic magnet reset
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72 instead of choosing the reboot menu, during the 10sec timeslot after
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73 starting bootloader write flash.
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74
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75
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76
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