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Handle case for indefinite tone duration #14

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Handle case for indefinite tone duration #14

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7 changes: 6 additions & 1 deletion Core/Src/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -167,7 +167,12 @@ int main(void)
uint32_t duration;
memcpy(&frequency, &i2c_buffer[0], sizeof(frequency));
memcpy(&duration, &i2c_buffer[4], sizeof(duration));
endTone = HAL_GetTick() + duration;

// If duration is set to 0 let the tone play indefinitely
// unless the frequency is also 0 which is the case when calling the noTone function.
if((duration > 0 && frequency > 0) || (duration == 0 && frequency == 0)) {
endTone = HAL_GetTick() + duration;
}

// TODO: make the prescaler precise and configurable
uint32_t val = 0xFFFF * 180 / frequency;
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