Sensor/Actuator I2C & SPI interface functions, used by Baremetal Sensor/Actuator interface. More...

Collaboration diagram for Baremetal I2C & SPI interface abstraction:

Macros
#define	SENSORIF_I2C_TIMEOUT 100 /* I2C bus access time-out time in [ms] */

#define	SENSORIF_I2C_CLK_FREQUENCY 100000 /* I2C SCL frequency [Hz], 100kHz (full-speed) */

#define	SENSORIF_INT_PULLUPS 0 /* I2C use internal pull-ups flag */

#define	SENSORIF_SPI_CLK_FREQUENCY 4000000 /* SPI CLK frequency [Hz], 4MHz (max frequency for E-paper display) */

#define	SENSORIF_SPI_DATA_WIDTH 8

#define	UART_SENSORIF_BAUDRATE 115200

Enumerations
enum	sensorif_i2c_status { SENSORIF_I2C_ST_START = 0x08 , SENSORIF_I2C_ST_RSTART = 0x10 , SENSORIF_I2C_ST_TX_AD_ACK = 0x18 , SENSORIF_I2C_ST_TX_AD_NACK = 0x20 , SENSORIF_I2C_ST_TX_DT_ACK = 0x28 , SENSORIF_I2C_ST_TX_DT_NACK = 0x30 , SENSORIF_I2C_ST_ARB_LOST = 0x38 , SENSORIF_I2C_ST_RX_AD_ACK = 0x40 , SENSORIF_I2C_ST_RX_AD_NACK = 0x48 , SENSORIF_I2C_ST_RX_DT_ACK = 0x50 , SENSORIF_I2C_ST_RX_DT_NACK = 0x58 , SENSORIF_I2C_ST_BUS_ERROR_RAW = 0x00 , SENSORIF_I2C_ST_STOP = 0xF0 , SENSORIF_I2C_ST_RELEASED = 0xF8 , SENSORIF_I2C_ST_NOT_IMPLEMENTED = 0xFE , SENSORIF_I2C_ST_SUCCESS = 0x00 , SENSORIF_I2C_ST_TIMEOUT = 0xFF , SENSORIF_I2C_ST_BUS_ERROR = 0xF1 }
	I2C master status enumerations. More...

enum	PWM_type_t { NOT_INITIALISED = 0 , USING_BPWM = 1 , USING_EPWM = 2 }

Functions
void	SENSORIF_I2C_Init (void)
	Initialises and enables I2C interface. More...

void	SENSORIF_I2C_Deinit (void)
	Disables I2C interface. More...

enum sensorif_i2c_status	SENSORIF_I2C_Write (u8_t slaveaddr, u8_t data, u32_t len)
	Writes bytes to I2C slave. More...

enum sensorif_i2c_status	SENSORIF_I2C_Read (u8_t slaveaddr, u8_t pdata, u32_t plen)
	Reads bytes from I2C slave. More...

void	SENSORIF_SPI_Init (bool is_eink_display_present)
	Initialises and enables SPI interface. More...

void	SENSORIF_SPI_Deinit (void)
	Disables SPI interface. More...

ca_error	SENSORIF_SPI_Write (u8_t out_data)
	Writes bytes to SPI slave. More...

void	SENSORIF_SPI_FULL_DUPLEX_RXONLY (u8_t *RxBuf, u8_t RxLen)
	Read data in the RX while sending IDLE data to TX. More...

void	SENSORIF_SPI_WRITE_THEN_READ (u8_t RxBuf, u8_t TxBuf, u8_t RxLen, u8_t TxLen)
	Exchange bytes between SPI slave and master. More...

void	SENSORIF_UART_Init (void)
	Initialises and enables UART interface. More...

void	SENSORIF_UART_Deinit (void)
	Disables UART interface. More...

u32_t	SENSORIF_UART_Write (u8_t *out_data, u32_t writebytes)
	Writes bytes to UART slave. More...

u32_t	SENSORIF_UART_Read (u8_t *in_data, u32_t readbytes)
	Read bytes to UART slave. More...

void	SENSORIF_I2C_Config (u32_t portnum)
	Set I2C Configuration. More...

void	SENSORIF_SPI_Config (u32_t portnum)
	Set SPI Configuration. More...

void	SENSORIF_UART_Config (u32_t portnum)
	Set UART Configuration. More...

ca_error	SENSORIF_PWM_Init (u8_t pin, u32_t u32Frequency, u32_t u32DutyCycle)
	Initialises and enables PWM for the specified frequency and duty cycle. More...

void	SENSORIF_PWM_Deinit (void)
	Deinitialises and disables PWM. More...

void	SENSORIF_PWM_SetDutyCycle (u32_t u32DutyCycle)
	Changes the duty cycle of the PWM. More...

Detailed Description

Sensor/Actuator I2C & SPI interface functions, used by Baremetal Sensor/Actuator interface.

Macro Definition Documentation

◆ SENSORIF_I2C_CLK_FREQUENCY

#define SENSORIF_I2C_CLK_FREQUENCY 100000 /* I2C SCL frequency [Hz], 100kHz (full-speed) */

◆ SENSORIF_I2C_TIMEOUT

#define SENSORIF_I2C_TIMEOUT 100 /* I2C bus access time-out time in [ms] */

◆ SENSORIF_INT_PULLUPS

#define SENSORIF_INT_PULLUPS 0 /* I2C use internal pull-ups flag */

◆ SENSORIF_SPI_CLK_FREQUENCY

#define SENSORIF_SPI_CLK_FREQUENCY 4000000 /* SPI CLK frequency [Hz], 4MHz (max frequency for E-paper display) */

◆ SENSORIF_SPI_DATA_WIDTH

#define SENSORIF_SPI_DATA_WIDTH 8

◆ UART_SENSORIF_BAUDRATE

#define UART_SENSORIF_BAUDRATE 115200

Enumeration Type Documentation

◆ PWM_type_t

enum PWM_type_t

Enumerator
NOT_INITIALISED
USING_BPWM
USING_EPWM

◆ sensorif_i2c_status

enum sensorif_i2c_status

I2C master status enumerations.

Enumerator
SENSORIF_I2C_ST_START	start
SENSORIF_I2C_ST_RSTART	repeat start
SENSORIF_I2C_ST_TX_AD_ACK	transmit address ACKed
SENSORIF_I2C_ST_TX_AD_NACK	transmit address NACKed
SENSORIF_I2C_ST_TX_DT_ACK	transmit data ACKed
SENSORIF_I2C_ST_TX_DT_NACK	transmit data NACKed
SENSORIF_I2C_ST_ARB_LOST	arbitration lost
SENSORIF_I2C_ST_RX_AD_ACK	receive address ACKed
SENSORIF_I2C_ST_RX_AD_NACK	receive address NACKed
SENSORIF_I2C_ST_RX_DT_ACK	receive data ACKed
SENSORIF_I2C_ST_RX_DT_NACK	receive data NACKed
SENSORIF_I2C_ST_BUS_ERROR_RAW	bus error code transmitted over wire
SENSORIF_I2C_ST_STOP	on reset or stop
SENSORIF_I2C_ST_RELEASED	bus released
SENSORIF_I2C_ST_NOT_IMPLEMENTED	not implemented
SENSORIF_I2C_ST_SUCCESS	successful transfer
SENSORIF_I2C_ST_TIMEOUT	bus access time-out
SENSORIF_I2C_ST_BUS_ERROR	bus error re-mapped from 0x00 for status return

Function Documentation

◆ SENSORIF_I2C_Config()

void SENSORIF_I2C_Config ( u32_t portnum )

Set I2C Configuration.

Parameters

portnum - I2C port number

◆ SENSORIF_I2C_Deinit()

void SENSORIF_I2C_Deinit ( void )

Disables I2C interface.

◆ SENSORIF_I2C_Init()

void SENSORIF_I2C_Init ( void )

Initialises and enables I2C interface.

◆ SENSORIF_I2C_Read()

enum sensorif_i2c_status SENSORIF_I2C_Read	(	u8_t	slaveaddr,
		u8_t *	pdata,
		u32_t *	plen
	)

Reads bytes from I2C slave.

Parameters

slaveaddr	- 6-Bit Slave Address
pdata	- Pointer to Data Buffer
plen	- Pointer to Buffer Length (actual length is returned in plen)

Returns: Status. 0: success, other: either I2C status or re-mapped

◆ SENSORIF_I2C_Write()

enum sensorif_i2c_status SENSORIF_I2C_Write	(	u8_t	slaveaddr,
		u8_t *	data,
		u32_t *	len
	)

Writes bytes to I2C slave.

Parameters

slaveaddr	- 6-Bit Slave Address
data	- Pointer to Data Buffer
len	- Pointer to Buffer Length (actual length is returned in plen)

Returns: Status. 0: success, other: either I2C status or re-mapped

◆ SENSORIF_PWM_Deinit()

void SENSORIF_PWM_Deinit ( void )

Deinitialises and disables PWM.

◆ SENSORIF_PWM_Init()

ca_error SENSORIF_PWM_Init	(	u8_t	pin,
		u32_t	u32Frequency,
		u32_t	u32DutyCycle
	)

Initialises and enables PWM for the specified frequency and duty cycle.

Note: After initialisation, change the duty cycle by calling SENSORIF_PWM_SetDutyCycle(). To change the frequency, deinitialise the PWM with SENSORIF_PWM_Deinit(), then call this function again with the required frequency.

Parameters

pin	- Number of the pin (e.g. 31) which the PWM will drive
u32Frequency	- Frequency of the PWM output waveform
u32DutyCycle	- Duty cycle as a percentage (number between 0 and 100)

Returns: Error status, indicating whether the initialisation succeeded or failed.

Return values

CA_ERROR_SUCCESS	- Initialisation succeeded
CA_ERROR_INVALID_ARGS	- Pin doesn't support PWM
CA_ERROR_ALREADY	- PWM already initialised. Call Deinit() first before reinitialising.

◆ SENSORIF_PWM_SetDutyCycle()

void SENSORIF_PWM_SetDutyCycle ( u32_t u32DutyCycle )

Changes the duty cycle of the PWM.

Parameters

u32DutyCycle - PWM Duty Cycle as a percentage (number between 0 and 100)

◆ SENSORIF_SPI_Config()

void SENSORIF_SPI_Config ( u32_t portnum )

Set SPI Configuration.

Parameters

portnum - SPI port number

◆ SENSORIF_SPI_Deinit()

void SENSORIF_SPI_Deinit ( void )

Disables SPI interface.

◆ SENSORIF_SPI_FULL_DUPLEX_RXONLY()

void SENSORIF_SPI_FULL_DUPLEX_RXONLY	(	u8_t *	RxBuf,
		u8_t	RxLen
	)

Read data in the RX while sending IDLE data to TX.

This is intended for receive-only transmission from the slave.

Parameters

RxBuf	- read data buffer
RxLen	- the data length

Returns: Return CA_ERROR_SUCCESS = 0x00 if successful and CA_ERROR_FAIL = 0x01 if transmit FIFO is full

◆ SENSORIF_SPI_Init()

void SENSORIF_SPI_Init ( bool is_eink_display_present )

Initialises and enables SPI interface.

Parameters

is_eink_display_present whether the SPI interface is used for communicating with a eink display. This configures it to half-duplex mode (MOSI only) and frees up PB5, which is usually used as an interrupt pin for the display.

◆ SENSORIF_SPI_Write()

ca_error SENSORIF_SPI_Write ( u8_t out_data )

Writes bytes to SPI slave.

Parameters

out_data - 8-bit data to send

Returns: Return CA_ERROR_SUCCESS = 0x00 if successful and CA_ERROR_FAIL = 0x01 if transmit FIFO is full

◆ SENSORIF_SPI_WRITE_THEN_READ()

void SENSORIF_SPI_WRITE_THEN_READ	(	u8_t *	RxBuf,
		u8_t *	TxBuf,
		u8_t	RxLen,
		u8_t	TxLen
	)

Exchange bytes between SPI slave and master.

 ***   Not being tested yet   ***

Parameters

RxBuf	- read data buffer
TxBuf	- write data buffer
RxLen	- read data length
TxLen	- write data length This function exchange data between SPI slave and master. It is able to transmit data and receive data.

Returns: Return CA_ERROR_SUCCESS = 0x00 if successful and CA_ERROR_FAIL = 0x01 if transmit FIFO is full

◆ SENSORIF_UART_Config()

void SENSORIF_UART_Config ( u32_t portnum )

Set UART Configuration.

Parameters

portnum - UART port number

◆ SENSORIF_UART_Deinit()

void SENSORIF_UART_Deinit ( void )

Disables UART interface.

◆ SENSORIF_UART_Init()

void SENSORIF_UART_Init ( void )

Initialises and enables UART interface.

◆ SENSORIF_UART_Read()

u32_t SENSORIF_UART_Read	(	u8_t *	in_data,
		u32_t	readbytes
	)

Read bytes to UART slave.

Parameters

in_data	- 8-bit data to read
readbytes	- number of bytes to read

Returns: Return read bytes

◆ SENSORIF_UART_Write()

u32_t SENSORIF_UART_Write	(	u8_t *	out_data,
		u32_t	writebytes
	)

Writes bytes to UART slave.

Parameters

out_data	- 8-bit data to send
writebytes	- number of bytes to write

Returns: Return write bytes

Macros

Enumerations

Functions

Detailed Description

Macro Definition Documentation

◆ SENSORIF_I2C_CLK_FREQUENCY

◆ SENSORIF_I2C_TIMEOUT

◆ SENSORIF_INT_PULLUPS

◆ SENSORIF_SPI_CLK_FREQUENCY

◆ SENSORIF_SPI_DATA_WIDTH

◆ UART_SENSORIF_BAUDRATE

Enumeration Type Documentation

◆ PWM_type_t

◆ sensorif_i2c_status

Function Documentation

◆ SENSORIF_I2C_Config()

◆ SENSORIF_I2C_Deinit()

◆ SENSORIF_I2C_Init()

◆ SENSORIF_I2C_Read()

◆ SENSORIF_I2C_Write()

◆ SENSORIF_PWM_Deinit()

◆ SENSORIF_PWM_Init()

◆ SENSORIF_PWM_SetDutyCycle()

◆ SENSORIF_SPI_Config()

◆ SENSORIF_SPI_Deinit()

◆ SENSORIF_SPI_FULL_DUPLEX_RXONLY()

◆ SENSORIF_SPI_Init()

◆ SENSORIF_SPI_Write()

◆ SENSORIF_SPI_WRITE_THEN_READ()

◆ SENSORIF_UART_Config()

◆ SENSORIF_UART_Deinit()

◆ SENSORIF_UART_Init()

◆ SENSORIF_UART_Read()

◆ SENSORIF_UART_Write()