i2c: set high and low times to values that conform to the i2c specification (#314)
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@ -67,8 +67,8 @@ uint i2c_set_baudrate(i2c_inst_t *i2c, uint baudrate) {
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// TODO there are some subtleties to I2C timing which we are completely ignoring here
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uint period = (freq_in + baudrate / 2) / baudrate;
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uint hcnt = period * 3 / 5; // oof this one hurts
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uint lcnt = period - hcnt;
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uint lcnt = period * 3 / 5; // oof this one hurts
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uint hcnt = period - lcnt;
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// Check for out-of-range divisors:
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invalid_params_if(I2C, hcnt > I2C_IC_FS_SCL_HCNT_IC_FS_SCL_HCNT_BITS);
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invalid_params_if(I2C, lcnt > I2C_IC_FS_SCL_LCNT_IC_FS_SCL_LCNT_BITS);
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