SPI CASE STUDY AND IMPLEMENTATON by Rishyab
SPI Serial Peripheral Interface (SPI) is an interface bus commonly used to send data between microcontrollers and small peripherals such as shift registers, sensors, and SD cards. It uses separate clock and data lines, along with a select line to choose the device you wish to talk to. Some sensors implement SPI (Serial Peripheral Interface) protocol for data transfer. The SPI protocol basically defines a bus with four wires (four signals) and a common ground. There is one master device controlling the activity on the bus, and one slave device. The slave is active only when one of the signals, Slave Select (SS) enables it. This signal is always provided by the master. There can be more than one slave connected to the SPI bus, but each slave requires its own Slave Select signal, see Fig. 1. The data gets transferred serially bit ‐ by ‐ bit. There are basically two signals to carry information, one from master to slave (MOSI, Master Output Slave Input, driven by master), and one for the o...