i2cSlaveDemo Design

This example illustrates how to utilize the Sapphire High-Performance SoC as an I²C slave, offering the functionality of an 8-bit by 256-bit memory module. The provided i2cMasterDemo application can control the i2cSlaveDemo application as described in this section.

Upon running the program, you will have the information on the I²C configurations, including the slave address, timeout settings, and various timing configurations.

The UART console acts as an interactive terminal, facilitating the monitoring of current memory values by simply pressing the I key.

By default, the slave is configured for 1-byte register addresses. For 2-byte register addresses, you need to modify the definition of WORD_REG_ADDR to 1.

The design displays these messages in a UART terminal:

i2c 0 slave demo!
i2c 0 init done
This device will asct as I2C Slave with 8 bit x 256 bit memory
Configurations:
Slave Address = 0x67
Timeout setting = 0x4c4b40
Tsu = 166
tLow = 250
tHigh = 250
tBuf = 500

    0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff
10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff
20: ff ff ff ff ff ff ff ff ff ff ff ff ff ff
30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff
40: ff ff ff ff ff ff ff ff ff ff ff ff ff ff
50: ff ff ff ff ff ff ff ff ff ff ff ff ff ff
60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff
70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff
80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff
90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff
a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff
b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff
c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff
d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff
e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff

press i to show the memory content of I2C slave
>>