EFM32 Gecko Software Documentation
efm32g-doc-5.1.2
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Inter-intergrated circuit (I2C) peripheral API.
Copyright 2016 Silicon Laboratories, Inc. http://www.silabs.com
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Definition in file em_i2c.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... | |