hello... i'm very new to SPI and i'm not quite understanding how to connect my nokia screen and sd card reader to spi..
here's my understanding of SPI. i have MOSI and MISO pins, a serial clock pin.. and then the slave select. if i hook up my screen to the arduino directly, i can also hook up the SD card reader to the same pins and have a different slave select pin for that... thus saving some valuable pins in the process. it makes sence.. but i have no idea how to go about doing that.
for anyone that wishes to help... http://ladyada.net/products/nokia5110/ here's a tutorial for the nokia lcd screen that comes with example code.. and the sd chip library is in the arduino ide already.
can someone write a really basic bare bones code example of using these via SPI together. i honestly have no idea how to do it, but i really do need to save all the pins i can with my current project. (a wristwatch computer terminal) i can show anyone interested the code which includes the circuit and chips included written down. so far, it's an extremely affordable project.
but i thank you in advance, anyone who can give me any tips or example code.