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AnalogSource: prevent a division by zero on zero ADC data

This commit is contained in:
Andrew Tridgell 2012-07-06 19:56:12 +10:00
parent 7bc724d118
commit ec70e87495
1 changed files with 5 additions and 1 deletions
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6
libraries/AP_AnalogSource/AP_AnalogSource_Arduino.cpp
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@ -94,7 +94,11 @@ uint16_t AP_AnalogSource_Arduino::read_raw(void)
// scaled read for board Vcc
uint16_t AP_AnalogSource_Arduino::read_vcc(void)
{
return 1126400UL / read_raw();
uint16_t v = read_raw();
if (v == 0) {
return 0;
}
return 1126400UL / v;
}
// read the average 16 bit value since the last