lib_apmc.c

ARM9200开发板的ROM boot程序源码1.0

//*----------------------------------------------------------------------------
//*         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_apmcBooster.c
//* Object              : Advanced Power Management Controller Library.
//*
//* 1.0 10/10/01  HI    : Creation
//*----------------------------------------------------------------------------

#include   "lib_apmc.h"
#include   "periph\stdc\lib_err.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 ( AT91PS_APMC pApmc, u_int mode )
{
    //* Depending on the required mode
    switch (mode)
    {
        //* Idle mode required
        case PS_MODE_IDLE:
            //* Write the System Clock Disable Register
            pApmc->APMC_SCDR = APMC_PROC ;
            break ;

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

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

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

//*----------------------------------------------------------------------------
//* 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 (AT91PS_APMC pApmc, u_int periph_id )
{
    //* Write the Peripheral Clock Enable Register
    pApmc->APMC_PCER = (1 << periph_id) ;
}


//*----------------------------------------------------------------------------
//* 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 (AT91PS_APMC pApmc, u_int periph_id )
{
    //* Write the Peripheral Clock Disable Register
    pApmc->APMC_PCDR = (1 << periph_id) ;
}


//*----------------------------------------------------------------------------
//* 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 (AT91PS_APMC pApmc, u_int periph_id )
{
    //* Return the Peripheral Clock Status Register
    return ( pApmc->APMC_PCSR & (1<<periph_id) ) ;
}


#if 0
//*----------------------------------------------------------------------------
//* Function Name       : at91_clock_get_pll_status
//* Object              : Return the APMC Status Register
//* Input Parameters    : none
//* Output Parameters   : none
//* Functions called    : none
//*----------------------------------------------------------------------------
u_int at91_clock_get_pll_status ( AT91PS_APMC pApmc )
{
    //* Return the PMC Status Register
    return ( pApmc->APMC_SR ) ;
}


//*----------------------------------------------------------------------------
//* Function Name       : at91_clock_generator_mode
//* Object              : Set Master Clock selection, Main OSC & PLL
//* Input Parameters    : none
//* Output Parameters   : none
//* Functions called    : none
//*----------------------------------------------------------------------------
void at91_clock_generator_mode (AT91PS_APMC pApmc, u_int source, u_int mode )
{
	//* Depending on the required source
    switch (source)
    {
        //* MCK source
        case APMC_MCK:
            //* Write the Master Register
            pApmc->APMC_MCKR = mode ;
            break ;
 		//* PCK0 source
        case APMC_PCK0:
            //* Write the Pad0 Register
            pApmc->APMC_PCKR[0] = mode ;
            break ;
		//* PCK1 source
        case APMC_PCK1:
            //* Write the Pad1 Register
            pApmc->APMC_PCKR[1] = mode ;
            break ;
		//* PCK2 source
        case APMC_PCK2:
            //* Write the Pad2 Register
            pApmc->APMC_PCKR[2] = mode ;
            break ;
		//* PCK3 source
        case APMC_PCK3:
            //* Write the Pad3 Register
            pApmc->APMC_PCKR[3] = mode ;
            break ;
	}
}
#endif