38 lines
796 B
C
38 lines
796 B
C
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#ifndef _FLOW_H_
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#define _FLOW_H_
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#define FLOW_PIN 19
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uint16_t flow_counter=0; //maximum counts/s measured with Eden 128 Pump was 171
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void IRAM_ATTR isr_flow();
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unsigned long last_read_flow=0;
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#define READINTERVAL_FLOW 1000
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float flow_factor=7.5; //F=7.5*flowrate[L/min]
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float flow;
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uint32_t flow_counter_sum=0;
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void flow_setup() {
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pinMode(FLOW_PIN, INPUT_PULLUP);
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attachInterrupt(FLOW_PIN, isr_flow, CHANGE);
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}
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void flow_loop(unsigned long loopmillis, unsigned long pInterval) {
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if (loopmillis>=last_read_flow+pInterval) {
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flow=flow_counter*1000.0/(loopmillis-last_read_flow)/2.0; //Frequency [Hz]
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flow/=flow_factor; //[L/min]
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flow_counter=0;
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last_read_flow=loopmillis;
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}
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}
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void IRAM_ATTR isr_flow() {
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flow_counter++;
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flow_counter_sum++;
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}
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#endif
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