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[stm32f4] add I2C frequencies 

STM32F4 allows I2C frequencies up to 42 MHz, this commit adds the missing
defines.
This commit is contained in:
Stefan Agner 2014-01-01 21:56:33 +01:00
parent fe6b542357
commit b4eb8a6971
1 changed files with 8 additions and 1 deletions
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9
include/libopencm3/stm32/common/i2c_common_all.h
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@ -165,7 +165,8 @@ specific memorymap.h header before including this header file.*/
/* Note: Bits [7:6] are reserved, and forced to 0 by hardware. */
/* FREQ[5:0]: Peripheral clock frequency (valid values: 2-36 MHz) */
/* FREQ[5:0]: Peripheral clock frequency (valid values: 2-36 MHz, 2-42 MHz for
* STM32F4 respectivly) */
/****************************************************************************/
/** @defgroup i2c_clock I2C clock frequency settings
@ingroup i2c_defines
@ -206,6 +207,12 @@ specific memorymap.h header before including this header file.*/
#define I2C_CR2_FREQ_34MHZ 0x22
#define I2C_CR2_FREQ_35MHZ 0x23
#define I2C_CR2_FREQ_36MHZ 0x24
#define I2C_CR2_FREQ_37MHZ 0x25
#define I2C_CR2_FREQ_38MHZ 0x26
#define I2C_CR2_FREQ_39MHZ 0x27
#define I2C_CR2_FREQ_40MHZ 0x28
#define I2C_CR2_FREQ_41MHZ 0x29
#define I2C_CR2_FREQ_42MHZ 0x2a
/**@}*/
/* --- I2Cx_OAR1 values ---------------------------------------------------- */