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I2C: Make I2C clock frequency accurate

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This commit is contained in:
Cao Sen Miao
2022-06-27 12:00:04 +08:00
parent cf41c255bb
commit e218723e0e
11 changed files with 293 additions and 50 deletions
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33
components/hal/esp32/include/hal/i2c_ll.h
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@@ -890,6 +890,39 @@ static inline void i2c_ll_update(i2c_dev_t *hw)
;// ESP32 do not support
}
/**
* @brief Configure I2C SCL timing
*
* @param hw Beginning address of the peripheral registers
* @param high_period The I2C SCL hight period (in core clock cycle, hight_period > 2)
* @param low_period The I2C SCL low period (in core clock cycle, low_period > 1)
* @param wait_high_period The I2C SCL wait rising edge period.
*
* @return None.
*/
static inline void i2c_ll_set_scl_clk_timing(i2c_dev_t *hw, int high_period, int low_period, int wait_high_period)
{
(void)wait_high_period;
hw->scl_low_period.period = low_period;
hw->scl_high_period.period = high_period;
}
/**
* @brief Get I2C SCL timing configuration
*
* @param hw Beginning address of the peripheral registers
* @param high_period Pointer to accept the SCL high period
* @param low_period Pointer to accept the SCL low period
*
* @return None
*/
static inline void i2c_ll_get_scl_clk_timing(i2c_dev_t *hw, int *high_period, int *low_period, int *wait_high_period)
{
*wait_high_period = 0; // Useless
*high_period = hw->scl_high_period.period;
*low_period = hw->scl_low_period.period;
}
#ifdef __cplusplus
}
#endif