78 lines
1.7 KiB
C++
78 lines
1.7 KiB
C++
/*
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* lecture des capteurs de temperature LM35
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*/
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/* -------------------------------------------------- */
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#define NBVAL 4
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#define DELAI 10000
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/* -------------------------------------------------- */
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void setup() {
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Serial.begin(9600);
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pinMode(LED_BUILTIN, OUTPUT);
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Serial.print("\n");
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/* XXX */
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/* changing the voltage reference of the ADC
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* greatly increase the prcision on the limited
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* range of our temperatures.
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*/
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analogReference(INTERNAL1V1); // Pour Arduino Mega2560
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delay(1000);
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Serial.print("M running\n");
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}
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/* -------------------------------------------------- */
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/* ================================================== */
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short adc_pins[] = { A0, A1, A2, A4 };
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#define NB_PASSE 4
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/* -------------------------------------------------- */
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void updatevalues(short *ptr)
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{
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short foo, pass;
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for (foo=0; foo<NBVAL; foo++) {
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ptr[foo] = 0;
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}
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digitalWrite(LED_BUILTIN, HIGH);
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for (pass=0; pass<NB_PASSE; pass++) {
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for (foo=0; foo<NBVAL; foo++) {
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ptr[foo] += analogRead(adc_pins[foo]);
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delay(100);
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}
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}
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for (foo=0; foo<NBVAL; foo++) {
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ptr[foo] /= NB_PASSE;
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}
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digitalWrite(LED_BUILTIN, LOW);
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}
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/* -------------------------------------------------- */
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void sendvalues(short *ptr)
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{
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int foo;
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Serial.print("T");
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for (foo=0; foo<NBVAL; foo++) {
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Serial.print(" ");
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Serial.print(ptr[foo]);
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}
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Serial.print("\n");
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}
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/* -------------------------------------------------- */
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void update_and_send(void)
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{
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short values[NBVAL];
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updatevalues(values);
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sendvalues(values);
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}
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/* ================================================== */
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void loop() {
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update_and_send();
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delay(DELAI);
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}
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/* -------------------------------------------------- */
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