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DCM: prevent a segmentation fault when compass is not enabled 

when compass is disabled _compass is NULL
This commit is contained in:
Andrew Tridgell 2012-01-13 15:48:07 +11:00
parent 9846822748
commit 15d446bde2
1 changed files with 8 additions and 3 deletions
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11
libraries/AP_DCM/AP_DCM.cpp
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@ -195,7 +195,9 @@ AP_DCM::accel_adjust(void)
void
AP_DCM::matrix_reset(void)
{
_compass->null_offsets_disable();
if (_compass != NULL) {
_compass->null_offsets_disable();
}
_dcm_matrix.a.x = 1.0f;
_dcm_matrix.a.y = 0.0f;
_dcm_matrix.a.z = 0.0f;
@ -208,8 +210,11 @@ AP_DCM::matrix_reset(void)
_omega_I.x = 0.0f;
_omega_I.y = 0.0f;
_omega_I.z = 0.0f;
_compass->null_offsets_enable(); // This call is needed to restart the nulling
// Otherwise the reset in the DCM matrix can mess up the nulling
if (_compass != NULL) {
_compass->null_offsets_enable(); // This call is needed to restart the nulling
// Otherwise the reset in the DCM matrix can mess up
// the nulling
}
}
/*************************************************