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Code Issues Releases Activity

Merge pull request #1912 from Lauszus/issues440

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Enable user to change the I2C clock frequency by calling setClock in the Wire library
This commit is contained in:
Cristian Maglie 2014-07-02 15:37:30 +02:00
commit 49ec540204
3 changed files with 9 additions and 2 deletions
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5
hardware/arduino/avr/libraries/Wire/Wire.cpp
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@ -75,6 +75,11 @@ void TwoWire::begin(int address)
begin((uint8_t)address);
}
void TwoWire::setClock(uint32_t frequency)
{
TWBR = ((F_CPU / frequency) - 16) / 2;
}
uint8_t TwoWire::requestFrom(uint8_t address, uint8_t quantity, uint8_t sendStop)
{
// clamp to buffer length

1
hardware/arduino/avr/libraries/Wire/Wire.h
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@ -49,6 +49,7 @@ class TwoWire : public Stream
void begin();
void begin(uint8_t);
void begin(int);
void setClock(uint32_t);
void beginTransmission(uint8_t);
void beginTransmission(int);
uint8_t endTransmission(void);

1
hardware/arduino/avr/libraries/Wire/keywords.txt
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@ -11,6 +11,7 @@
#######################################
begin KEYWORD2
setClock KEYWORD2
beginTransmission KEYWORD2
endTransmission KEYWORD2
requestFrom KEYWORD2