Error : 'H_MAG[16]' may be used uninitialized

ArduCopter Copter 4.0
,
1

20220104_160135
20220104_1601351920Ă—1121 210 KB

how can u fix it?

1 Like
2

What firmware version are you compiling?
Did you do any changes to the source code?

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3

arducopter 4.0.4
I can compile on another pc.

4

Do not do that. Please consider using at least ArduCopter 4.0.7.

And yes, please try another PC.

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5

What’s the cause?
Firmware Below 4.0.7 can’t compile at all.

6

The cause is that firmware bellow 4.0.7 has bugs (some critical) that have been fixed in ArduCopter 4.0.7.
We do minor software releases to fix important bugs, not for the sake of releasing new features or introducing regressions.

The ArduCopter release notes are public as the rest of the source code. There you can see exactly what changed.

And ArduCopter 4.1.3 has already been released. It has been under test for since around May 2021.

And you can just grab the precompiled firmware from our firmware server

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7

I put … #pragma GCC diagnostic ignored “-Wuninitialized”
to ignore them.

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored “-Wuninitialized”
// correct the covariance P = (I - K*H)*P
// take advantage of the empty columns in KH to reduce the
// number of operations
for (unsigned i = 0; i<=stateIndexLim; i++) {
for (unsigned j = 0; j<=2; j++) {
KH[i][j] = Kfusion[i] * H_MAG[j];
}
for (unsigned j = 3; j<=15; j++) {
KH[i][j] = 0.0f;
}
for (unsigned j = 16; j<=21; j++) {
KH[i][j] = Kfusion[i] * H_MAG[j];
}
for (unsigned j = 22; j<=23; j++) {
KH[i][j] = 0.0f;
}
}
#pragma GCC diagnostic pop