I2C Scanner examples #303
I2C Scanner examples #303
Conversation
Tested on Bluepill for all three I2c (TWI 1 - TWI 1 alternative pin - TWI 2)
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Thanks @Testato |
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| // Pinmap for Bluepill I2Cs (by Testato) |
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I wonder if it's really needed to add specific board pins?
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yes, i think it is very useful add at least one examples for a board, and the Bluepill is the most famous ST variant
| // I2C-1 alternative pins: PB9(sda) PB8(scl) | ||
| // TwoWire Wire_alt(PB9,PB8); | ||
| // | ||
| // I2C-2: PB9(sda) PB8(scl) |
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If kept, this line need to be updated:
// I2C-2: PB11(sda) PB10(scl)
| void setup() { | ||
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| Serial.begin(9600); | ||
| Wire.begin(); |
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Other method to use another I2C pin or instance, it to update the Pins before call Begin().
This allow to kept Wire instance and declare a new one.
Example for the BP:
Wire.setSDA(PB9);
Wire.setSCL(PB8);
Wire.begin();
or
Wire.setSDA(PB11);
Wire.setSCL(PB10);
Wire.begin();
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yes, i also think is better, but you cannot use two I2c in the sametime, so the second must have a second declaration.
I will modifie the example, look if you like it
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I know :)
I only gave several example to use only one but with different pins possibilities.
I2C Scanner examples
Tested on Bluepill for all three I2c (TWI 1 - TWI 1 alternative pin - TWI 2)