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--- module:microcontroller:stm32f103pcf8574portwrite:stm32f103pcf8574portwrite [2022/11/19 14:12] – [211119] omdevelop
+++ module:microcontroller:stm32f103pcf8574portwrite:stm32f103pcf8574portwrite [2022/11/19 15:46] (current) – [Abstract] omdevelop
@@ Line 1: / Line 1: @@
 ====== STM32F103PCF8574PortWrite ======
+[[http://www.openhardsoftware.de/ | Open Hard- & Software]]
+[[http://www.openhardsoftware.de/dokuwiki | DokuWiki]]
+[[http://www.openhardsoftware.de/dokuwiki/doku.php?id=module:module | Module]]
+[[http://www.openhardsoftware.de/dokuwiki/doku.php?id=module:microcontroller:microcontroller | MicroController]]
 ===== Abstract =====
+  * Ansteuerung des PCF8574 mit STM32F103C8T6 über I2C-Bus (Pullups 1k)
+  * beide I2C-Busse des STM32F103C8T6 mit gleicher Software benutzbar
+  * benutzte Arduino-PCF8574-I2C-Library (hier benutzt: Version 0.3.7):
+  * [[https://github.com/RobTillaart/PCF8574 | PCF8574 by Rob Tillaar]]
+  * funktioniert mit I2C-Bus-Versorgung 3V3 und 5V0
 ===== ToDo =====
 ===== Done =====
 ==== 211119 ====
+  * Ansteuerung des PCF8574 über zwei beim STM32F103 vorhandene getrennte I2C-Busse
   * Download : {{:module:microcontroller:stm32f103pcf8574portwrite:2211191158_stm32f103pcf8574portwrite_01v02.zip | 2211191158_STM32F103PCF8574PortWrite_01V02.zip}}
+<code>
+#include <Arduino.h>
+#include "PCF8574.h"
+//
+const int PIN_LEDSYSTEM = PC13;
+const int I2C1_SDA = PB7;
+const int I2C1_SCL = PB6;
+const int I2C2_SDA = PB11;
+const int I2C2_SCL = PB10;
+//
+TwoWire I2CA(I2C1_SDA, I2C1_SCL);
+TwoWire I2CB(I2C2_SDA, I2C2_SCL);
+//
+// OK PCF8574 PCF8574Device(0x38, &I2CA);
+// OK
+PCF8574 PCF8574Device(0x38, &I2CB);
+//
+void setup()
+{
+  pinMode(PIN_LEDSYSTEM, OUTPUT);
+  digitalWrite(PIN_LEDSYSTEM, LOW);
+  //
+  PCF8574Device.begin();
+  delay(100);
+}
+//
+void loop()
+{
+  PCF8574Device.write8(0xFF);
+  digitalWrite(PIN_LEDSYSTEM, LOW);
+  delayMicroseconds(100000);
+  PCF8574Device.write8(0x00);
+  digitalWrite(PIN_LEDSYSTEM, HIGH);
+  delayMicroseconds(1);
+}
+</code>
+{{:module:microcontroller:stm32f103pcf8574portwrite:2211191452_stm32f103i2cpcf8574.mp4?600 | 2211191452_STM32F103I2CPCF8574.mp4}}
+\\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\
 ==== 211119 ====
+  * Ansteuerung des PCF8574 mit STM32F103C8T6
   * Download : {{:module:microcontroller:stm32f103pcf8574portwrite:2211191107_stm32f103pcf8574portwrite_01v01.zip | 2211191107_STM32F103PCF8574PortWrite_01V01.zip}}
+  * verwendete Library (zwei Dateien: PCF8574.cpp und PCF8574.h)
+{{:module:microcontroller:stm32f103pcf8574portwrite:2211191419_library_manager.png?600 | 2211191419_Library Manager.png}}
+\\ \\ \\ \\ \\ \\ \\ \\ \\ \\
+--------------
+[[http://www.openhardsoftware.de/ | Open Hard- & Software]]
+[[http://www.openhardsoftware.de/dokuwiki | DokuWiki]]
+[[http://www.openhardsoftware.de/dokuwiki/doku.php?id=module:module | Module]]
+[[http://www.openhardsoftware.de/dokuwiki/doku.php?id=module:microcontroller:microcontroller | MicroController]]