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SDA,SCL任一引脚低电平Busy会置位，例程里面总线如果一直Busy就是锁死，超时100ms复位IIC。 #101

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SDA,SCL任一引脚低电平Busy会置位，例程里面总线如果一直Busy就是锁死，超时100ms复位IIC。 #101

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11 changes: 9 additions & 2 deletions libraries/Wire/examples/slave_sender/slave_sender.ino
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,7 @@


#include <Wire.h>

unsigned long IICfreetime = 0;
void setup()
{
Wire.begin(2); // join i2c bus with address #2
Expand All @@ -20,7 +20,14 @@ void setup()

void loop()
{
delay(100);
if (__HAL_I2C_GET_FLAG(Wire.getHandle(), I2C_FLAG_BUSY) == RESET) {
IICfreetime = millis(); //总线不忙
} else if ((millis() - IICfreetime) > 100) { //总线忙超过100ms复位
Wire.end();
Wire.begin(2);
Wire.onRequest(requestEvent);
}
delay(1);
}

// function that executes whenever data is requested by master
Expand Down