lib_pmc63200.c

ARM入门的好帮手.包含了从简单到相对较复杂的程序.

//*----------------------------------------------------------------------------
//*         ATMEL Microcontroller Software Support  -  ROUSSET  -
//*----------------------------------------------------------------------------
//* The software is delivered "AS IS" without warranty or condition of any
//* kind, either express, implied or statutory. This includes without
//* limitation any warranty or condition with respect to merchantability or
//* fitness for any particular purpose, or against the infringements of
//* intellectual property rights of others.
//*----------------------------------------------------------------------------
//* File Name           : lib_pmc63200.c
//* Object              : Power Management Controller Library.
//*
//* 1.0 01/04/00 JCZ    : Creation
//*----------------------------------------------------------------------------

#include    "periph/power_saving/lib_power_save.h"

//*----------------------------------------------------------------------------
//* Function Name       : at91_clock_set_mode
//* Object              : Set System Clock Mode.
//* Input Parameters    : <mode> = 
//* Output Parameters   : none
//* Functions called    : at91_error
//*----------------------------------------------------------------------------
void at91_clock_set_mode ( u_int mode )
//* Begin
{
    //* Depending on the required mode
    switch (mode)
    {
        //* Idle mode required
        case PS_MODE_IDLE:
            //* Write the System Clock Disable Register
            PMC_BASE->PMC_SCDR = PMC_ARM7DIS ;
            break ;

        //* Active all peripheral clocks
        case PS_ALL_PERIPH_ACTIVE:
            //* Enable all the peripheral clocks
            PMC_BASE->PMC_PCER = 0xFFFFFFFF ;
            break ;

        //* Desactive all peripheral clocks
        case PS_ALL_PERIPH_INACTIVE:
            //* Disable all the peripheral clocks
            PMC_BASE->PMC_PCDR = 0xFFFFFFFF ;
            break ;

        //* Unknown
        default:
            //* Run AT91 Library error function
            at91_error (__FILE__, __LINE__) ;
    }
    //* EndSwitch
}
//* End

//*----------------------------------------------------------------------------
//* Function Name       : at91_clock_open
//* Object              : Enable the peripheral clock
//* Input Parameters    : <periph_id> = peripheral identifier
//* Output Parameters   : none
//* Functions called    : none
//*----------------------------------------------------------------------------
void at91_clock_open ( u_int periph_id )
//* Begin
{
    //* Write the Peripheral Clock Enable Register
    PMC_BASE->PMC_PCER = (1 << periph_id) ;
}
//* End

//*----------------------------------------------------------------------------
//* Function Name       : at91_clock_close
//* Object              : Disable the clock of a Peripheral
//* Input Parameters    : <periph_id> = peripheral identifier
//* Output Parameters   : none
//* Functions called    : none
//*----------------------------------------------------------------------------
void at91_clock_close ( u_int periph_id )
//* Begin
{
    //* Write the Peripheral Clock Disable Register
    PMC_BASE->PMC_PCDR = (1 << periph_id) ;
}
//* End

//*----------------------------------------------------------------------------
//* Function Name       : at91_clock_get_status 
//* Object              : Return the Peripheral clock status 
//* Input Parameters    : <periph_id> = peripheral identifier
//* Output Parameters   : none
//* Functions called    : none
//*----------------------------------------------------------------------------
u_int at91_clock_get_status ( u_int periph_id )
//* Begin
{
    //* Return the Peripheral Clock Status Register
    return ( PMC_BASE->PMC_PCSR & (1<<periph_id) ) ;
}
//* End