类似于下面的这个
Here's a list of the things you can currently do with the AVR Shell:
- Read all your Data Direction Registers (DDRn), ports, and pins in real-time
- Write to all your DDRn's, ports, and pins to turn on motors, LED's, or read sensors in real-time
- List all known registers on the system
- Create and store values in user-defined variables backed up by EEPROM.
- Create a root password and authenticate against it (used for telnet access)
- Read the configured CPU clock speed
- Change your CPU clock speed by setting a prescaler
- Start and stop 16-bit timers for timing of various things
- Power up and/or power down peripheral sub-systems: Analog to Digital Converters (ADC), Serial Peripheral Interface (SPI), Two-wire Interface (TWI/I2C), UART/USART. Useful for when you want to reduce power consumption of the microcontroller or to enable certain functions.
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