I want to simulate an I2C slave device using a generic 8051 MPU which doesn't have hardware I2C(not like 80C552). I know it is easy to implement software simulated I2C in master mode, but I want to turn my 8051 MPU to be a slave device. How can?
Thanks Eric, I know how to deal with slave I2C with the on-chip I2C controller. But if there is no on-chip I2C controller, how can? It seems difficult to implement. First the 8051 speed must be high (> 30M), and the I2C speed shall be slowed down so that software can simulate the I2C. Anyone has experience on it?
Hi, you can check your code with my I²C simulation (works with µVision2) (http://www.c51.de/c51.de/Dateien/uVision2DLLs.php3?Spr=EN). You can find also a I²C library http://www.c51.de/c51.de/Dateien/Liste.php3?Edit=0&showHerst=1&showArt=1&RubrikID=15 and search I2c_lib (suchen == search) Michael
Thanks Michael, I've already known your simulation DLL. You did a great job. Yes, your I2C simulation works in slave mode, but your I2c_lib only works in master mode, right? What I want is to let my 8051 MPU work in slave mode, so that other MPU, or PC can send data to it via I2C. Anyway, it is not critical, I can use another I2C device like I2C memory to store the intermedial data, or use UART to transfer data. But I'm interested in finding a way that costs little. That's why I don't want to use on-chip I2C controller or UART or third I2C device.
Hi Archie, yes it's only for slave communication, sorry. Michael