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 |