Hi all, I'm playing with a DS28EA00's PIOs and a LM393 based rain detector (the classical schema used as well on light detector, vibration detector, etc ...).
* PIO.A is used to switch ON / OFF the detector by controlling it's VCC through a transistor : no problem here. * PIO.B is connected LM393 output with an inboard pull-up. The problem is if LM393 is low when PIO.A is set low (to switch on the detector), PIO.B is forced as output LOW. It's clearly an issue with OWFS as I tested with an ESP8266 with following code and I haven't this issue : --- #include <OWBus.h> #include <OWBus/DS28EA00.h> #define ONE_WIRE_BUS 5 // Where 1-wire bus is connected to (GPIO-5) OneWire oneWire(ONE_WIRE_BUS); // Initialize oneWire library OWBus bus(&oneWire); void setup() { Serial.begin(115200); delay(100); } void status(DS28EA00 &p){ uint8_t pios = p.readPIOs(); Serial.print(pios, HEX); Serial.print(" (val, flipflop) PIO.A : "); Serial.print(p.getPIOA() ? "1,":"0,"); Serial.print(p.getFlipFlopA() ? "1":"0"); Serial.print(" / PIO.B : "); Serial.print(p.getPIOB() ? "1,":"0,"); Serial.println(p.getFlipFlopB() ? "1":"0"); } void loop() { DS28EA00 p( bus, 0x42886847000000bf ); p.readPIOs(); // Get "initial" value Serial.println("\nPIO.A = On (0)"); p.writePIOs( p.getFlipFlopB() ? DS28EA00::PIObitsvalue::PIOBbit : 0 ); // PIO.A set to 0, PIO.B value kept status(p); delay(1e3); Serial.println("Retour état initial (PIO.A = 1)"); p.writePIOs( DS28EA00::PIObitsvalue::PIOAbit | // set PIO.A to HIGH ( p.getFlipFlopB() ? DS28EA00::PIObitsvalue::PIOBbit : 0 ) // and keep PIO.B ); status(p); delay(1e3); } --- As you know, both PIOs are set at the same time and I suspect the status of PIO.B latch is not checked and then resent when PIO.A is modified. Consequently, its bit is set low and makes its transistor conducting. Best regards, Laurent ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers