Detailed Description

Inter-intergrated circuit (I2C) peripheral API.

Version: 5.1.2

License

Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:

The origin of this software must not be misrepresented; you must not claim that you wrote the original software.
Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
This notice may not be removed or altered from any source distribution.

DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no obligation to support this Software. Silicon Labs is providing the Software "AS IS", with no express or implied warranties of any kind, including, but not limited to, any implied warranties of merchantability or fitness for any particular purpose or warranties against infringement of any proprietary rights of a third party.

Silicon Labs will not be liable for any consequential, incidental, or special damages, or any other relief, or for any claim by any third party, arising from your use of this Software.

Definition in file em_i2c.h.

#include "em_device.h"
#include <stdbool.h>

Go to the source code of this file.

Data Structures
struct	I2C_Init_TypeDef

struct	I2C_TransferSeq_TypeDef
	Master mode transfer message structure used to define a complete I2C transfer sequence (from start to stop). More...

Macros
#define	I2C_FLAG_10BIT_ADDR 0x0010

#define	I2C_FLAG_READ 0x0002
	Indicate plain read sequence: S+ADDR(R)+DATA0+P. More...

#define	I2C_FLAG_WRITE 0x0001
	Indicate plain write sequence: S+ADDR(W)+DATA0+P. More...

#define	I2C_FLAG_WRITE_READ 0x0004
	Indicate combined write/read sequence: S+ADDR(W)+DATA0+Sr+ADDR(R)+DATA1+P. More...

#define	I2C_FLAG_WRITE_WRITE 0x0008
	Indicate write sequence using two buffers: S+ADDR(W)+DATA0+DATA1+P. More...

#define	I2C_FREQ_FAST_MAX 392157
	Fast mode max frequency assuming using 6:3 ratio for Nlow:Nhigh. More...

#define	I2C_FREQ_FASTPLUS_MAX 987167
	Fast mode+ max frequency assuming using 11:6 ratio for Nlow:Nhigh. More...

#define	I2C_FREQ_STANDARD_MAX 93000
	Standard mode max frequency assuming using 4:4 ratio for Nlow:Nhigh. More...

#define	I2C_INIT_DEFAULT

Enumerations
enum	I2C_ClockHLR_TypeDef { i2cClockHLRStandard = _I2C_CTRL_CLHR_STANDARD, i2cClockHLRAsymetric = _I2C_CTRL_CLHR_ASYMMETRIC, i2cClockHLRFast = _I2C_CTRL_CLHR_FAST }

enum	I2C_TransferReturn_TypeDef { i2cTransferInProgress = 1, i2cTransferDone = 0, i2cTransferNack = -1, i2cTransferBusErr = -2, i2cTransferArbLost = -3, i2cTransferUsageFault = -4, i2cTransferSwFault = -5 }

Functions
uint32_t	I2C_BusFreqGet (I2C_TypeDef *i2c)
	Get current configured I2C bus frequency. More...

void	I2C_BusFreqSet (I2C_TypeDef *i2c, uint32_t freqRef, uint32_t freqScl, I2C_ClockHLR_TypeDef i2cMode)
	Set I2C bus frequency. More...

void	I2C_Enable (I2C_TypeDef *i2c, bool enable)
	Enable/disable I2C. More...

void	I2C_Init (I2C_TypeDef i2c, const I2C_Init_TypeDef init)
	Initialize I2C. More...

__STATIC_INLINE void	I2C_IntClear (I2C_TypeDef *i2c, uint32_t flags)
	Clear one or more pending I2C interrupts. More...

__STATIC_INLINE void	I2C_IntDisable (I2C_TypeDef *i2c, uint32_t flags)
	Disable one or more I2C interrupts. More...

__STATIC_INLINE void	I2C_IntEnable (I2C_TypeDef *i2c, uint32_t flags)
	Enable one or more I2C interrupts. More...

__STATIC_INLINE uint32_t	I2C_IntGet (I2C_TypeDef *i2c)
	Get pending I2C interrupt flags. More...

__STATIC_INLINE uint32_t	I2C_IntGetEnabled (I2C_TypeDef *i2c)
	Get enabled and pending I2C interrupt flags. Useful for handling more interrupt sources in the same interrupt handler. More...

__STATIC_INLINE void	I2C_IntSet (I2C_TypeDef *i2c, uint32_t flags)
	Set one or more pending I2C interrupts from SW. More...

void	I2C_Reset (I2C_TypeDef *i2c)
	Reset I2C to same state as after a HW reset. More...

__STATIC_INLINE uint8_t	I2C_SlaveAddressGet (I2C_TypeDef *i2c)
	Get slave address used for I2C peripheral (when operating in slave mode). More...

__STATIC_INLINE uint8_t	I2C_SlaveAddressMaskGet (I2C_TypeDef *i2c)
	Get slave address mask used for I2C peripheral (when operating in slave mode). More...

__STATIC_INLINE void	I2C_SlaveAddressMaskSet (I2C_TypeDef *i2c, uint8_t mask)
	Set slave address mask used for I2C peripheral (when operating in slave mode). More...

__STATIC_INLINE void	I2C_SlaveAddressSet (I2C_TypeDef *i2c, uint8_t addr)
	Set slave address to use for I2C peripheral (when operating in slave mode). More...

I2C_TransferReturn_TypeDef	I2C_Transfer (I2C_TypeDef *i2c)
	Continue an initiated I2C transfer (single master mode only). More...

I2C_TransferReturn_TypeDef	I2C_TransferInit (I2C_TypeDef i2c, I2C_TransferSeq_TypeDef seq)
	Prepare and start an I2C transfer (single master mode only). More...

Detailed Description

License

Data Structures

Macros

Enumerations

Functions