SPI ARDUINO CONTROLLER SERIAL

For example if you want to have a SPI throughput of 8 Mbits/s and your chip rate is 16 MHz you use the following function with the parameter setClockDivider(SPI_CLOCK_DIV2). To set the SPI clock relative to the system clock you use the function setClockDivider(). The ESP8266 has a higher chip rate compared to the Arduino microcontroller with 80 MHz and it is recommended to reduce the communication speed for the ESP8266 microcontroller too. Most Arduino microcontroller have a chip rate of 16 MHz but it is recommend to set the communication speed to ½ of the chip rate 8 MHz (8,000,000 bits/s).

The speed which can be used by the microcontroller is based on the chip rate (clock rate). The maximal throughput is up to 10,000,000 bits/s and much faster than I2C and UART. SPI is recommended when the communication speed needs to bet very fast.

SPI ARDUINO CONTROLLER SERIAL

Like I2C, SPI is a synchronous serial data protocol and therefore need a clock to synchronize the communication between master and slave devices. The transferred data is grouped in packages / messages, made of a header and a payloadĭata is transferred bit by bit along a single wire You can connect multiple salves to a single master You can have multiple masters controlling one or multiple slaves

Instead of a clock signal the data steam itself contain start and stop signals 1960 by Gordon Bell at Digital Equipment CorporationĪ clock line is required to synchronize the communication

Spi arduino controller