Skip to content

Rethink STM32 I2C v2 HAL #15350

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 4 commits into from
Dec 5, 2022
Merged

Rethink STM32 I2C v2 HAL #15350

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
0751932
Rethink STM32 I2C v2 HAL
Nov 21, 2022
63fbaaf
Add documentation for I2C_EVENT macros
multiplemonomials Nov 28, 2022
0c2ee4f
Add some additional I2C error codes
multiplemonomials Nov 28, 2022
d59c34b
Fix compile error on static pinmap targets
multiplemonomials Dec 4, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
31 changes: 29 additions & 2 deletions hal/include/hal/i2c_api.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -35,10 +35,36 @@
*
* @{
*/

/**
* Indicates that an unspecified error has occurred in the transfer. This usually means
* either an internal error in the Mbed MCU's I2C module, or something like an arbitration loss.
* Does not indicate a NACK.
*/
#define I2C_EVENT_ERROR (1 << 1)

/**
* Indicates that the slave did not respond to the address byte of the transfer.
*/
#define I2C_EVENT_ERROR_NO_SLAVE (1 << 2)

/**
* Indicates that the transfer completed successfully.
*/
#define I2C_EVENT_TRANSFER_COMPLETE (1 << 3)

/**
* Indicates that a NACK was received after the address byte, but before the requested number of bytes
* could be transferred.
*
* Note: Not every manufacturer HAL is able to make a distinction between this flag and #I2C_EVENT_ERROR_NO_SLAVE.
* On a NACK, you might conceivably get one or both of these flags.
*/
#define I2C_EVENT_TRANSFER_EARLY_NACK (1 << 4)

/**
* Use this macro to request all possible I2C events.
*/
#define I2C_EVENT_ALL (I2C_EVENT_ERROR | I2C_EVENT_TRANSFER_COMPLETE | I2C_EVENT_ERROR_NO_SLAVE | I2C_EVENT_TRANSFER_EARLY_NACK)

/**@}*/
Expand All @@ -61,7 +87,8 @@ typedef struct i2c_s i2c_t;

enum {
I2C_ERROR_NO_SLAVE = -1,
I2C_ERROR_BUS_BUSY = -2
I2C_ERROR_BUS_BUSY = -2,
I2C_ERROR_INVALID_USAGE = -3 ///< Invalid usage of the I2C API, e.g. by mixing single-byte and transactional function calls.
};

typedef struct {
Expand Down Expand Up @@ -229,7 +256,7 @@ int i2c_byte_read(i2c_t *obj, int last);
*
* @param obj The I2C object
* @param data Byte to be written
* @return 0 if NAK was received, 1 if ACK was received, 2 for timeout.
* @return 0 if NAK was received, 1 if ACK was received, 2 for timeout, or 3 for other error.
*/
int i2c_byte_write(i2c_t *obj, int data);

Expand Down
33 changes: 0 additions & 33 deletions targets/TARGET_STM/TARGET_STM32F0/objects.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -77,39 +77,6 @@ struct serial_s {
#endif
};

struct i2c_s {
Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

It's a bit silly that this structure is copied verbatim into like 10 different objects.h headers, despite all of them being identical and being used by a single version of i2c_api.c. Since I had to modify the structure, I consolidated these into a single version in stm_i2c_api.h while I was at it.

/* The 1st 2 members I2CName i2c
* and I2C_HandleTypeDef handle should
* be kept as the first members of this struct
* to ensure i2c_get_obj to work as expected
*/
I2CName i2c;
I2C_HandleTypeDef handle;
uint8_t index;
int hz;
PinName sda;
PinName scl;
IRQn_Type event_i2cIRQ;
IRQn_Type error_i2cIRQ;
uint32_t XferOperation;
volatile uint8_t event;
volatile int pending_start;
int current_hz;
#if DEVICE_I2CSLAVE
uint8_t slave;
volatile uint8_t pending_slave_tx_master_rx;
volatile uint8_t pending_slave_rx_maxter_tx;
uint8_t *slave_rx_buffer;
volatile uint16_t slave_rx_buffer_size;
volatile uint16_t slave_rx_count;
#endif
#if DEVICE_I2C_ASYNCH
uint32_t address;
uint8_t stop;
uint8_t available_events;
#endif
};

struct analogin_s {
ADC_HandleTypeDef handle;
PinName pin;
Expand Down
35 changes: 0 additions & 35 deletions targets/TARGET_STM/TARGET_STM32F3/objects.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -90,41 +90,6 @@ struct serial_s {
#endif
};

struct i2c_s {
/* The 1st 2 members I2CName i2c
* and I2C_HandleTypeDef handle should
* be kept as the first members of this struct
* to ensure i2c_get_obj to work as expected
*/
I2CName i2c;
I2C_HandleTypeDef handle;
uint8_t index;
int hz;
PinName sda;
PinName scl;
int sda_func;
int scl_func;
IRQn_Type event_i2cIRQ;
IRQn_Type error_i2cIRQ;
uint32_t XferOperation;
volatile uint8_t event;
volatile int pending_start;
int current_hz;
#if DEVICE_I2CSLAVE
uint8_t slave;
volatile uint8_t pending_slave_tx_master_rx;
volatile uint8_t pending_slave_rx_maxter_tx;
uint8_t *slave_rx_buffer;
volatile uint16_t slave_rx_buffer_size;
volatile uint16_t slave_rx_count;
#endif
#if DEVICE_I2C_ASYNCH
uint32_t address;
uint8_t stop;
uint8_t available_events;
#endif
};

struct dac_s {
DACName dac;
PinName pin;
Expand Down
33 changes: 0 additions & 33 deletions targets/TARGET_STM/TARGET_STM32F7/objects.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -108,39 +108,6 @@ struct serial_s {
#endif
};

struct i2c_s {
/* The 1st 2 members I2CName i2c
* and I2C_HandleTypeDef handle should
* be kept as the first members of this struct
* to ensure i2c_get_obj to work as expected
*/
I2CName i2c;
I2C_HandleTypeDef handle;
uint8_t index;
int hz;
PinName sda;
PinName scl;
IRQn_Type event_i2cIRQ;
IRQn_Type error_i2cIRQ;
uint32_t XferOperation;
volatile uint8_t event;
volatile int pending_start;
int current_hz;
#if DEVICE_I2CSLAVE
uint8_t slave;
volatile uint8_t pending_slave_tx_master_rx;
volatile uint8_t pending_slave_rx_maxter_tx;
uint8_t *slave_rx_buffer;
volatile uint16_t slave_rx_buffer_size;
volatile uint16_t slave_rx_count;
#endif
#if DEVICE_I2C_ASYNCH
uint32_t address;
uint8_t stop;
uint8_t available_events;
#endif
};

struct analogin_s {
ADC_HandleTypeDef handle;
PinName pin;
Expand Down
35 changes: 0 additions & 35 deletions targets/TARGET_STM/TARGET_STM32G0/objects.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -89,41 +89,6 @@ struct serial_s {
#endif
};

struct i2c_s {
/* The 1st 2 members I2CName i2c
* and I2C_HandleTypeDef handle should
* be kept as the first members of this struct
* to ensure i2c_get_obj to work as expected
*/
I2CName i2c;
I2C_HandleTypeDef handle;
uint8_t index;
int hz;
PinName sda;
PinName scl;
int sda_func;
int scl_func;
IRQn_Type event_i2cIRQ;
IRQn_Type error_i2cIRQ;
uint32_t XferOperation;
volatile uint8_t event;
volatile int pending_start;
int current_hz;
#if DEVICE_I2CSLAVE
uint8_t slave;
volatile uint8_t pending_slave_tx_master_rx;
volatile uint8_t pending_slave_rx_maxter_tx;
uint8_t *slave_rx_buffer;
volatile uint16_t slave_rx_buffer_size;
volatile uint16_t slave_rx_count;
#endif
#if DEVICE_I2C_ASYNCH
uint32_t address;
uint8_t stop;
uint8_t available_events;
#endif
};

struct flash_s {
/* nothing to be stored for now */
uint32_t dummy;
Expand Down
35 changes: 0 additions & 35 deletions targets/TARGET_STM/TARGET_STM32G4/objects.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -88,41 +88,6 @@ struct serial_s {
#endif
};

struct i2c_s {
/* The 1st 2 members I2CName i2c
* and I2C_HandleTypeDef handle should
* be kept as the first members of this struct
* to ensure i2c_get_obj to work as expected
*/
I2CName i2c;
I2C_HandleTypeDef handle;
uint8_t index;
int hz;
PinName sda;
PinName scl;
int sda_func;
int scl_func;
IRQn_Type event_i2cIRQ;
IRQn_Type error_i2cIRQ;
uint32_t XferOperation;
volatile uint8_t event;
volatile int pending_start;
int current_hz;
#if DEVICE_I2CSLAVE
uint8_t slave;
volatile uint8_t pending_slave_tx_master_rx;
volatile uint8_t pending_slave_rx_maxter_tx;
uint8_t *slave_rx_buffer;
volatile uint16_t slave_rx_buffer_size;
volatile uint16_t slave_rx_count;
#endif
#if DEVICE_I2C_ASYNCH
uint32_t address;
uint8_t stop;
uint8_t available_events;
#endif
};

struct dac_s {
DACName dac;
PinName pin;
Expand Down
33 changes: 0 additions & 33 deletions targets/TARGET_STM/TARGET_STM32H7/objects.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -97,39 +97,6 @@ struct serial_s {
#endif
};

struct i2c_s {
/* The 1st 2 members I2CName i2c
* and I2C_HandleTypeDef handle should
* be kept as the first members of this struct
* to ensure i2c_get_obj to work as expected
*/
I2CName i2c;
I2C_HandleTypeDef handle;
uint8_t index;
int hz;
PinName sda;
PinName scl;
IRQn_Type event_i2cIRQ;
IRQn_Type error_i2cIRQ;
uint32_t XferOperation;
volatile uint8_t event;
volatile int pending_start;
int current_hz;
#if DEVICE_I2CSLAVE
uint8_t slave;
volatile uint8_t pending_slave_tx_master_rx;
volatile uint8_t pending_slave_rx_maxter_tx;
uint8_t *slave_rx_buffer;
volatile uint16_t slave_rx_buffer_size;
volatile uint16_t slave_rx_count;
#endif
#if DEVICE_I2C_ASYNCH
uint32_t address;
uint8_t stop;
uint8_t available_events;
#endif
};

struct analogin_s {
ADC_HandleTypeDef handle;
PinName pin;
Expand Down
35 changes: 0 additions & 35 deletions targets/TARGET_STM/TARGET_STM32L0/objects.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -91,41 +91,6 @@ struct serial_s {
#endif
};

struct i2c_s {
/* The 1st 2 members I2CName i2c
* and I2C_HandleTypeDef handle should
* be kept as the first members of this struct
* to ensure i2c_get_obj to work as expected
*/
I2CName i2c;
I2C_HandleTypeDef handle;
uint8_t index;
int hz;
PinName sda;
PinName scl;
int sda_func;
int scl_func;
IRQn_Type event_i2cIRQ;
IRQn_Type error_i2cIRQ;
uint32_t XferOperation;
volatile uint8_t event;
volatile int pending_start;
int current_hz;
#if DEVICE_I2CSLAVE
uint8_t slave;
volatile uint8_t pending_slave_tx_master_rx;
volatile uint8_t pending_slave_rx_maxter_tx;
uint8_t *slave_rx_buffer;
volatile uint16_t slave_rx_buffer_size;
volatile uint16_t slave_rx_count;
#endif
#if DEVICE_I2C_ASYNCH
uint32_t address;
uint8_t stop;
uint8_t available_events;
#endif
};

#if DEVICE_FLASH
struct flash_s {
/* nothing to be stored for now */
Expand Down
35 changes: 0 additions & 35 deletions targets/TARGET_STM/TARGET_STM32L4/objects.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -87,41 +87,6 @@ struct serial_s {
#endif
};

struct i2c_s {
/* The 1st 2 members I2CName i2c
* and I2C_HandleTypeDef handle should
* be kept as the first members of this struct
* to ensure i2c_get_obj to work as expected
*/
I2CName i2c;
I2C_HandleTypeDef handle;
uint8_t index;
int hz;
PinName sda;
PinName scl;
int sda_func;
int scl_func;
IRQn_Type event_i2cIRQ;
IRQn_Type error_i2cIRQ;
uint32_t XferOperation;
volatile uint8_t event;
volatile int pending_start;
int current_hz;
#if DEVICE_I2CSLAVE
uint8_t slave;
volatile uint8_t pending_slave_tx_master_rx;
volatile uint8_t pending_slave_rx_maxter_tx;
uint8_t *slave_rx_buffer;
volatile uint16_t slave_rx_buffer_size;
volatile uint16_t slave_rx_count;
#endif
#if DEVICE_I2C_ASYNCH
uint32_t address;
uint8_t stop;
uint8_t available_events;
#endif
};

struct flash_s {
/* nothing to be stored for now */
uint32_t dummy;
Expand Down
Loading