ac97_example.c

含t h r e a d x,u c o s 的b s p

/***********************************************************************
 * $Workfile:   ac97_example.c  $
 * $Revision:   1.3  $
 * $Author:   WellsK  $
 * $Date:   Oct 01 2003 12:03:58  $
 *
 * Project: AC97 interrupt mode driver example
 *
 * Description:
 *     A AC97 driver (interrupt mode) example.
 *
 * Revision History:
 * $Log:   //smaicnt2/pvcs/VM/sharpmcu/archives/sharpmcu/software/csps/lh7a404/bsps/sdk7a404/examples/ac97_int_play/ac97_example.c-arc  $
 * 
 *    Rev 1.3   Oct 01 2003 12:03:58   WellsK
 * Added logic to get TTB address from register CP15 TTB.
 * 
 *    Rev 1.2   Sep 18 2003 09:26:32   WellsK
 * Updated example for MMU and VIC driver changes.
 * 
 *    Rev 1.1   Jul 18 2003 09:35:40   WellsK
 * Added reset of CODEC after ac97_open() command.
 * 
 *    Rev 1.0   Jul 07 2003 09:40:22   WellsK
 * Initial revision.
 * 
 *
 ***********************************************************************
 * SHARP MICROELECTRONICS OF THE AMERICAS MAKES NO REPRESENTATION
 * OR WARRANTIES WITH RESPECT TO THE PERFORMANCE OF THIS SOFTWARE,
 * AND SPECIFICALLY DISCLAIMS ANY RESPONSIBILITY FOR ANY DAMAGES, 
 * SPECIAL OR CONSEQUENTIAL, CONNECTED WITH THE USE OF THIS SOFTWARE.
 *
 * SHARP MICROELECTRONICS OF THE AMERICAS PROVIDES THIS SOFTWARE SOLELY 
 * FOR THE PURPOSE OF SOFTWARE DEVELOPMENT INCORPORATING THE USE OF A 
 * SHARP MICROCONTROLLER OR SYSTEM-ON-CHIP PRODUCT. USE OF THIS SOURCE
 * FILE IMPLIES ACCEPTANCE OF THESE CONDITIONS.
 *
 * COPYRIGHT (C) 2001 SHARP MICROELECTRONICS OF THE AMERICAS, INC.
 *     CAMAS, WA
 **********************************************************************/

#include "abl_types.h"
#include "abl_irq_fiq.h"
#include "abl_arm922t_cp15_driver.h"
#include "lh7a404_ac97_driver.h"
#include "lh7a404_timer_driver.h"
#include "lh7a404_vic_driver.h"
#include "sdk7a404_cpld_driver.h"
#include "sma_pacmanva.h"

/* Sample complete flag, set by callback function */
volatile BOOL_32 sample_complete;

/***********************************************************************
 *
 * Function: c_entry
 *
 * Purpose: Interrupt mode AC97 driver example
 *
 * Processing:
 *     See function. This example sets up the CODEC to play a stereo
 *     sample on the PCM output.
 *
 * Parameters: None
 *
 * Outputs: None
 *
 * Returns: Always returns 1
 *
 * Notes: None
 *
 **********************************************************************/
STATIC INT_32 ac97_int_cb(INT_32 bytes_transferred)
{
    /* Suppress compiler warning */
    bytes_transferred = bytes_transferred;

    /* Signal the main task that the sample has completed playing */
    sample_complete = TRUE;

    return 0;
}

/***********************************************************************
 *
 * Function: c_entry
 *
 * Purpose: Interrupt mode AC97 driver example
 *
 * Processing:
 *     See function. This example sets up the CODEC to play a stereo
 *     sample on the PCM output.
 *
 * Parameters: None
 *
 * Outputs: None
 *
 * Returns: Always returns 1
 *
 * Notes: None
 *
 **********************************************************************/
int c_entry(void)
{
    INT_32 xa, ac97dev1, iter;
    AC97_VOLUME_T vol;
    AC97_MIX_GAIN_T mix;
    AC97_TONE_T tone;
    AC97_CHANNEL_CONFIG_T chcfg;
    AC97_BKG_T ac97int;

    /* Disable interrupts */
    disable_irq_fiq();

    /* Initialize CPLD */
    cpld_init();

    /* Set virtual address of MMU table (needed for VIC driver
       functions) */
    cp15_set_vmmu_addr((UNS_32 *) cp15_get_ttb());

    /* Initialize interrupt system */
    vic_initialize(0xC0000000);

    /* Install standard IRQ dispatcher at ARM IRQ vector */
    vic_install_arm_handler(IRQ_VEC, (PFV) vic_arm_irq_dispatcher);

    /* Install VIC1 and VIC2 handlers */
    vic_install_arm_handler(VIC1_IRQ_VEC, (PFV) vic1_irq_dispatcher);
    vic_install_arm_handler(VIC2_IRQ_VEC, (PFV) vic2_irq_dispatcher);

    /* Install AC97 handler in the IRQ dispatcher */
    vic_install_handler(VIC_AACINTR, VIC_IRQ, (PFV) ac97_isr);

    /* Open the AC97 controller channel #1 */
    if ((ac97dev1 = ac97_open(AAC, 0)) == (INT_32) NULL)
    {
        return 0;
    }

    /* Reset AC97 CODEC power and allow a small delay (300mS) for
       device to re-initialize correctly */
    ac97_ioctl(ac97dev1, AC97_DO_RESET, 1);
    timer_wait_us(TIMER1, (300 * 1000));

    /* Enable IRQ interrupts in the ARM core */
    enable_irq();

    /* Enable AC97 interrupt in the interrupt controller */
    vic_int_enable(VIC_AACINTR, TRUE);

    /* Set CODEC volumes to MAX (all CODEC outputs) */
    vol.mute   = FALSE;
    vol.left   = AC97_MAX_VOL;
    vol.right  = AC97_MAX_VOL;
    vol.select = MASTER_OUT;
    ac97_ioctl(ac97dev1, AC97_SET_VOL, (INT_32) &vol);
    vol.select = AUX_OUT;
    ac97_ioctl(ac97dev1, AC97_SET_VOL, (INT_32) &vol);
    vol.select = MONO_OUT;
    ac97_ioctl(ac97dev1, AC97_SET_VOL, (INT_32) &vol);

    /* Mute all CODEC mixer channels */
    mix.mute   = FALSE;
    mix.left   = AC97_MIX_GN_MIN;
    mix.right  = AC97_MIX_GN_MIN;
    for (xa = BEEP_OUT; xa < PCM_OUT; xa++)
    {
        mix.select = (AC97_MIX_GAIN_SEL_T) xa;
        ac97_ioctl(ac97dev1, AC97_SET_MIXGAIN, (INT_32) &mix);
    }

    /* Set PCM output channel to max gain in mixer (volume) */
    mix.mute   = FALSE;
    mix.left   = AC97_REC_GN_MAX;
    mix.right  = AC97_REC_GN_MAX;
    mix.select = PCM_OUT;
    ac97_ioctl(ac97dev1, AC97_SET_MIXGAIN, (INT_32) &mix);

    /* Set bass and treble tone control to bypass */
    tone.bass_gain = AC97_TONE_BYPASS;
    tone.treble_gain = AC97_TONE_BYPASS;
    ac97_ioctl(ac97dev1, AC97_SET_TONE, (INT_32) &tone);

    /* Play sample using interrupts */
    chcfg.srate = BPSEC_11025;
    chcfg.ssize = BPSAM_16;
    chcfg.channels = 2;
    chcfg.compact = TRUE;
    chcfg.dir = PLAYBACK;
    chcfg.tmode = AC97_INTERRUPT;
    ac97_ioctl(ac97dev1, AC97_SET_CHANNEL, (INT_32) &chcfg);

    /* Play sample 3 times at different rates */
    for (iter = 0; iter < 3; iter++)
    {
        ac97_ioctl(ac97dev1, AC97_SET_CHANNEL, (INT_32) &chcfg);
        chcfg.srate++;

        /* Set buffer to play */
        ac97int.buffer = (UNS_16 *) sma_pacmanva;

        /* Number of samples x 2(stereo) x size of sample(UNS_16) */
        ac97int.transfer_size = (SMA_PACMANVA_NUM_SAMPLES  * 2
            * sizeof (UNS_16));

        /* Set the trip size so it will the user callback function at
           the end of the audio clip */
        ac97int.transfer_trip_size = ac97int.transfer_size;
        ac97int.funcptr = (AC97_CB_FUNC_T) ac97_int_cb;

        /* Start audio playback of data */
        ac97_ioctl(ac97dev1, AC97_INT_START, (INT_32) &ac97int);

        /* Wait for channel to finish sample */
        sample_complete = FALSE;
        while (sample_complete == FALSE);

        /* Get the byte count transferred */
        xa = ac97_ioctl(ac97dev1, AC97_GET_STATUS, AC97_TRANSFER_CT);
    }

    /* Disable AC97 interrupt in the interrupt controller */
    vic_int_enable(VIC_AACINTR, FALSE);

    /* Disable ARM core IRQ interrupts */
    disable_irq();

    return 1;
}

#ifndef __GNUC__
/* With ARM and GHS toolsets, the entry point is main() - this will
   allow the linker to generate wrapper code to setup stacks, allocate
   heap area, and initialize and copy code and data segments. For GNU
   toolsets, the entry point is through __start() in the crt0_gnu.asm
   file, and that startup code will setup stacks and data */
int main(void)
{
    return c_entry();
}
#endif