Example : I2C

I2C components of OSS-EC

In this section, we will use the OSS-EC I2C component ( I2C IC ) as an example.

• The software architecture of the OSS-EC is configured to pair with the hardware architecture of the I2C component, as shown in ( fig.1 ).
• The state of an I2C component is changed by a command from the application as shown in ( fig.2).
• The interface between the application and PCMP is the argument structure cmd and the return value structure res, as shown in ( fig.3 ).
• Command sequence ( fig.4 )
• Data table

Blue label characters are data related to Application & circuit & MPU.

Data table

#define Label	Value	Data contents
iPCMP_Cyc	1000U	PCMP Function call cycle 1000[ms]
iError_times	3U	PCMP Error times 3times
iCom_retry_num	3U	I2C communication retry 3times
iTemp_low	5.0F	Judgment temperature value 5.0[℃] for turning on the heater
iEndian	iBig	Endian select
iI2C_SDA	D14	SDA Pin
iI2C_SCL	D15	SCL Pin
iI2C_frequency	4000U	Frequency 4kHz