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Correct test for Galileo capability #6434

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merged 3 commits into from Dec 21, 2020
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stronnag
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@stronnag stronnag commented Dec 20, 2020

@Mateyhv discovered that if one has a BN220 based on ublox-8 rather than Ublox M8N, then:

  • The versions are (HW [00080000] SW[3.01]) are the same
  • The ublox-8 does not have flash
  • The ublox-8 does NOT support Galileo

This can result in erroneously reserving channel slots that cannot be used as the device passes the HW/SW test.
See https://www.u-blox.com/sites/default/files/products/documents/u-blox8-M8_ReceiverDescrProtSpec_%28UBX-13003221%29.pdf page 5

This PR changes the test to explicitly test the version extensions for "GAL"; it may also be considered to be a corner case to far.

// after hw + sw vers; each is 30 bytes, ensure NUL terminated
for(int j = 40; j < _payload_length; j += 30) {
_buffer.bytes[j+29] = 0;
if (strstr((const char *)(_buffer.bytes+j), "GAL")) {
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Maybe better to use strnstr here and avoid adding the \0 terminator?

@stronnag stronnag merged commit a15993c into master Dec 21, 2020
@stronnag stronnag deleted the jh_improve_galileo_test branch December 21, 2020 12:41
@stronnag stronnag added this to the 2.7 milestone Dec 21, 2020
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