Thanks to anyone who can show me what I am doing wrong. You can adapt these to your needs if using a different microcontroller I know its something I must have missed but I am too frustrated to see it. I'm using the ATMEGA328P here, so I'm going to define some macros to make things clearer. Before we get going, we need to set up the pins for the SPI bus on the AVR (which we're using in master mode). In our case, the ATmega is the master In Part 1 we got the SPI bus set up on an AVR ATMEGA328P microcontroller. If the ATmega is the slave, then SS must be on PB2. SS does not necessarily have to be on PB2 if the ATmega is the master. To use the built-in SPI of the ATmega328P, SCK, MISO, and MOSI must use the pins as stipulated in the comments. You can see the ATmega pin assignments on port B used for SPI. Looking at the function, initializeSPI(), there is a great deal of information in the comments. Unlike UART, SPI is synchronous, meaning data transfers are. It is the method used by programming devices like the usbtiny to transfer programs to AVR microcontrollers and is a way to interface with SD cards, among other things.
Codevisionavr xmega io input serial#
Serial Peripheral Interface (SPI) is a very useful data transfer protocol for microcontrollers.
0 kommentar(er)
