General Description

Reference I2C port functions for PSOC Edge E84.

Functions
uint32_t	touchpad_i2c_init (void)
	Initializes the I2C interface for the touchpad.

uint32_t	touchpad_i2c_read (uint16_t subaddress, uint8_t data, uint16_t length, void intf_ptr)
	Reads data from the touchpad device over I2C.

uint32_t	touchpad_i2c_write (uint16_t subaddress, uint8_t data, uint16_t length, void intf_ptr)
	Writes data to the touchpad device over I2C.

Function Documentation

◆ touchpad_i2c_init()

uint32_t touchpad_i2c_init ( void )

Initializes the I2C interface for the touchpad.

This function initializes the I2C peripheral and configures it for communication with the touchpad device. It must be called before any read or write operations are performed.

Returns: : 0 - Initialization successful Non-zero - Initialization failed

Note: Ensure that the I2C hardware and pins are properly configured.

◆ touchpad_i2c_read()

uint32_t touchpad_i2c_read	(	uint16_t	subaddress,
		uint8_t *	data,
		uint16_t	length,
		void *	intf_ptr )

Reads data from the touchpad device over I2C.

This function reads a specified number of bytes from the given subaddress (register) of the touchpad device and stores the data in the provided buffer.

Parameters

[in]	subaddress	: Register address to read from.
[out]	data	: Pointer to buffer where read data will be stored.
[in]	length	: Number of bytes to read.
[in]	intf_ptr	: Pointer to interface-specific context (e.g., I2C handle or slave address).

Returns: : 0 - Read successful Non-zero - Read failed

Note: The 'data' pointer must be valid and have sufficient space.

◆ touchpad_i2c_write()

uint32_t touchpad_i2c_write	(	uint16_t	subaddress,
		uint8_t *	data,
		uint16_t	length,
		void *	intf_ptr )

Writes data to the touchpad device over I2C.

This function writes a specified number of bytes to the given subaddress (register) of the touchpad device using the provided data buffer.