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由 yungchi@cs.nctu.edu.tw 提交于
Add I2C driver and a 24LC024H i2c eeprom usage example Now only support I2C1, not yet fully support I2C2 ****GPIO Config**** I2C1 SDA -> PB8 I2C1 SCL -> PB9 git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1716 bbd45198-f89e-11dd-88c7-29a3b14d5316
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