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Hello to all. I am working todays on some projects that need controlling a solenoid valve with a at91sam7x256. I want to know what extra hard I need. I meen the driver of the solenoid valve. Actually I know we shall not connect that 2 pieces directly, but how and why? Another question is that which port of that micro best suits such a hardware if we need high speed serial communication. Thanks in advance for your attention.
He hight have thought about CAN for serial communication.
But if the specific chip happens to support CAN, then there should be no need to ask which pins to use for that task. Same should normally be true for UART, I2C, SPI, USB, Ethernet, ... so we do require more information.
then there should be no need to ask which pins to use for that task
Not only no need, but no possibility either. You do not want to bit-bang CAN. Not even on an ARM. Asynchronous multi-master serial communication with a requirement to check a CRC within a single bit time to decide whether to ACK may not be completely impossible --- but it would be enormously wasteful to try. Some goes, with even more certainty, for USB and Ethernet.
UART, SPI and I2C can often be handled by bit-banging, but you should still only do that if there are no dedicated peripherals available.