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Check freq != 0 in PWMSpindle to prevent div-by-0 crashes

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This commit is contained in:
Mitch Bradley
2021-05-21 13:53:58 -10:00
parent fe41a4d516
commit d1d74165f6
1 changed files with 3 additions and 0 deletions
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3
Grbl_Esp32/src/Spindles/PWMSpindle.cpp
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@@ -225,6 +225,9 @@ namespace Spindles {
*/ */
uint8_t PWM::calc_pwm_precision(uint32_t freq) { uint8_t PWM::calc_pwm_precision(uint32_t freq) {
uint8_t precision = 0; uint8_t precision = 0;
if (freq == 0) {
return precision;
}
// increase the precision (bits) until it exceeds allow by frequency the max or is 16 // increase the precision (bits) until it exceeds allow by frequency the max or is 16
while ((1 << precision) < (uint32_t)(80000000 / freq) && precision <= 16) { while ((1 << precision) < (uint32_t)(80000000 / freq) && precision <= 16) {