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Flashing CC2531 with approx 250 KB firmware takes 2 hours #25

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@mmithril

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@mmithril
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INFO: Found a CC2531 chip on /dev/ttyACM0

Chip information:
      Chip ID : 0xb524
   Flash size : 256 Kb
    Page size : 2 Kb
    SRAM size : 8 Kb
          USB : Yes
Sections in CC2531ZNP-Pro-Secure_LinkKeyJoin_mod.hex:

 Addr.    Size
-------- -------------
 0x0000   8176 B
 0x1ff6   10 B
 0x3fff0   1 B
 0x2000   239616 B

This is going to ERASE and REPROGRAM the chip. Are you sure? <y/N>:  y

Flashing:
 - Chip erase...
 - Flashing 4 memory blocks...
 -> 0x0000 : 8176 bytes
    Progress 100%... OK
 -> 0x1ff6 : 10 bytes
    Progress 100%... OK
 -> 0x3fff0 : 1 bytes
    Progress 100%... OK
 -> 0x2000 : 239616 bytes
    Progress 0%...
    Progress 79%...

Each percent in final stage takes approximatelly 60 s. Is it inherent to the CC Debug protocol?

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