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softi2c_master: improve pin configuration

This commit is contained in:
King Kévin 2022-07-11 18:47:36 +02:00
parent ba1752a409
commit e7d3a86e45
1 changed files with 2 additions and 2 deletions
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4
softi2c_master.c
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@ -83,11 +83,11 @@ bool softi2c_master_setup(uint16_t freq_khz)
// switch pins to open drain
SCL_PORT->ODR.reg |= SCL_PIN; // ensure clock is high
SCL_PORT->DDR.reg |= SCL_PIN; // switch pin to output
SCL_PORT->CR1.reg &= ~SCL_PIN; // use in open-drain mode
SCL_PORT->DDR.reg |= SCL_PIN; // switch pin to output
SDA_PORT->ODR.reg |= SDA_PIN; // ensure data is high
SDA_PORT->DDR.reg |= SDA_PIN; // switch pin to output
SDA_PORT->CR1.reg &= ~SDA_PIN; // use in open-drain mode
SDA_PORT->DDR.reg |= SDA_PIN; // switch pin to output
I2C_delay(); // give time to get high
return (read_SCL() && read_SDA()); // line is ready when the two lines are high