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i2c: fix I2C slave clock source selection

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In I2C slave mode, clock source can now be changed, according to
the flags specified in `i2c_config_t` structure. Thus, ESP32-S2
can now act as an I2C slave, even with a 400KHz master clock.
This commit is contained in:
Omar Chebib
2021-05-24 10:51:38 +08:00
parent f29d873c54
commit 2575c0d49f
4 changed files with 42 additions and 14 deletions
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components/driver/include/driver/i2c.h
+7 -6
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@@ -74,14 +74,15 @@ typedef struct{
union {
struct {
uint32_t clk_speed; /*!< I2C clock frequency for master mode, (no higher than 1MHz for now) */
} master; /*!< I2C master config */
uint32_t clk_speed; /*!< I2C clock frequency for master mode, (no higher than 1MHz for now) */
} master; /*!< I2C master config */
struct {
uint8_t addr_10bit_en; /*!< I2C 10bit address mode enable for slave mode */
uint16_t slave_addr; /*!< I2C address for slave mode */
} slave; /*!< I2C slave config */
uint8_t addr_10bit_en; /*!< I2C 10bit address mode enable for slave mode */
uint16_t slave_addr; /*!< I2C address for slave mode */
uint32_t maximum_speed; /*!< I2C expected clock speed from SCL. */
} slave; /*!< I2C slave config */
};
uint32_t clk_flags; /*!< Bitwise of ``I2C_SCLK_SRC_FLAG_**FOR_DFS**`` for clk source choice*/
uint32_t clk_flags; /*!< Bitwise of ``I2C_SCLK_SRC_FLAG_**FOR_DFS**`` for clk source choice*/
} i2c_config_t;