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====== STM32F103PCF8574PortWrite ======
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[[http://www.openhardsoftware.de/dokuwiki/doku.php?id=module:module | Module]]
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===== 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}}
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==== 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}}
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--------------
[[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]]