Set Peripheral modules to idle mode and how to activate this module

---------------- How to set the peripheral module to idle -----------------------

Each peripheral module can be set to idle mode as follows:

1. Write 1 to the corresponding bit of picr, and the corresponding bit is the bit corresponding to the peripheral.
2. Write 1 to the peri bit of the back-to-back office.
3. Run the idle command
4. The peripherals of the corresponding picr bit will enter the idle state.

Picr registers such as ------------------ methods for recovering the peripheral module from the idle state --------------------- one-time activation of all peripherals:

1. Write 0 to the back-to-back Peri bit.
2. Run the idle command
3. All peripherals are activated.

How to activate some peripherals:

1. Write 0 to the corresponding peripheral bit of picr

After writing, the corresponding peripherals are activated. ----------------------------------------------------------------------- Note:

1. Picr: Peripheral idle control register
2. If a module is not used and tries to set it to idle mode for the reusable peripherals, such as mcbsp2 and UART, it will cause a bus error.