ssp_dma_audio.c

SHARP_ARM720T_LH79524/5软件开发包_支持TFT_LCD_NAND_FLASH_ETH_USB

/**********************************************************************
 * Copyright (c) 2002 Sharp Microelectronics of the Americas
 *
 *        All rights reserved
 *      
 * $Workfile:   ssp_dma_audio.c  $
 * $Revision:   1.0  $
 * $Author:   ZhangJ  $
 * $Date:   Oct 20 2004 09:03:30  $
 *
 * 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.
 *
 * Project: LH79520 EVB Example Code
 *
 * Description:
 *    This example will generate SSP signal on SSP0 and SSP1
 *
 * Notes:
 *  
 * Revision History:
 * $Log:   //smaicnt2/pvcs/VM/sharpmcu/archives/sharpmcu/software/csps/lh79524/bsps/sdk79524/examples/audio/ssp_dma_audio.c-arc  $
 * 
 *    Rev 1.0   Oct 20 2004 09:03:30   ZhangJ
 * Initial revision.
 * 
 *    Rev 1.0   Jul 09 2003 09:13:30   LiJ
 * Initial revision.
 * 
 * 
 *********************************************************************/

#include <string.h> 
#include "lh79524_rcpc.h"
#include "lh79524_int_driver.h"
#include "lh79524_ssp_driver.h"
#include "lh79524_sdk_audio_driver.h"

#include "sma_tk_16.h"

#define LED_ADDR    0x4cb00000

STATIC INT_32 dev_ssp = 0, dev_irq = 0;
STATIC volatile INT_32 ssp_occured = 0;

volatile int ssp_done = 0; 
volatile int ssp_data_left = 0, ssp_data_current = 0; 
volatile short *ssp_data_source; 

    CHAR   tmp_char[] = "ssp testing sentense!";
    CHAR   tmp_new_char[80];
      
  
     
/**********************************************************************
*
* Function: dma1_int_handler
*
* Purpose:
*   DMA interruption handler 
*  
* Processing:
*
* Parameters:
*   None
*
* Outputs:
*   None
*
* Returns:
*   Nothing
*
* Notes:
*   None
*
**********************************************************************/
void dma1_int_handler(void)
{
    /* Clear ssp int bit */
    ssp_ioctl(dev_ssp, SSP_DMA_TX_INT_HANDLER, 0);
    
    /* Set indication bit */
    ssp_occured = 1;    
}

/**********************************************************************
*
* Function: init_ssp_slave_audio
*
* Purpose:
*   init the ssp in slave mode to drive the audio chip
*  
* Processing:
*
* Parameters:
*   None
*
* Outputs:
*   None
*
* Returns:
*   Nothing
*
* Notes:
*   None
*
**********************************************************************/
int init_ssp_slave_audio(short * source, int count)
{

    /* Open SSP */
    if ((dev_ssp = ssp_open(SSP,0)) == 0x0)
    {
        /* Error opening the device */
        return 0;
    }
    
    /* Set SSP frame format */
    ssp_ioctl(dev_ssp, SSP_SET_FRAME_FORMAT, SSP_MODE_TI);
    
    /* Set SSP in slave mode */
    ssp_ioctl(dev_ssp, SSP_SET_SLAVE, 1);
    
     /* Set SSP data size */
    ssp_ioctl(dev_ssp, SSP_SET_DATA_SIZE, 16);
    
    /* Init SSP DMA mode */
    ssp_ioctl(dev_ssp, SSP_DMA_TX_INIT, 0);
        
    /* Set source address */
    ssp_ioctl(dev_ssp, SSP_DMA_SET_SOURCE, (INT_32)source);

    /* Set count */
    ssp_ioctl(dev_ssp, SSP_DMA_SET_COUNT, count);
            
     /* Enable TX FIFO int */
    //ssp_ioctl(dev_ssp, SSP_INT_ENABLE, SSP_TRANSMIT_FIFO_INT);
            
    ssp_data_source = source;
    
    ssp_data_left = count;
    
    ssp_data_current = 0;
    
    /* Open IRQ */
    if ((dev_irq = irq_open(0,0)) == 0x0)
    {
        /* Error opening the device */
        return 0;
    }
    /* Enable IRQ source */
    irq_ioctl(dev_irq, IRQ_ENABLE_SOURCE, VIC_DMA1);
    
    /* Set up priority for SSP interrupt */
    irq_ioctl(dev_irq, IRQ_SET_PRIORITY, 1);
    
    /* Set up interruption handler */
    irq_ioctl(dev_irq, IRQ_SET_HANDLER, (INT_32)dma1_int_handler);
    
    /* Enable SSP */
    ssp_ioctl(dev_ssp, SSP_ENABLE, 1);

    /* Start SSP */
    ssp_ioctl(dev_ssp, SSP_DMA_TX_START, 0);
            
    /* Enable global IRQ bit */
    irq_ioctl(dev_irq, IRQ_GLOBAL_ENABLE, 1);
    
    return -1;
    
}
/**********************************************************************
*
* Function: c_entry
*
* Purpose:
*   Function entry point from the startup code.
*  
* Processing:
*   
*
* Parameters:
*   None
*
* Outputs:
*   None
*
* Returns:
*   Nothing
*
* Notes:
*   None
*
**********************************************************************/
INT_32 c_entry (void)
{
    int i;
    
    UNS_16 * sound_source, num_samples;
    
	audio_tl320dac23_configure(SAMPLE_44P1_KHZ);
    
	num_samples = SMA_TK_16_NUM_SAMPLES;	

	sound_source = (UNS_16 *)sma_tk_16;

	init_ssp_slave_audio((short *)sound_source, num_samples);
    
    /* Wait until it is done */
    while(ssp_occured == 0);

        /* string match, no error, turn on LED */
        *(volatile UNS_16 *)(LED_ADDR) = 0x2;

    for(i=0;i<1000000;i++);
    /* Done with the SSP DMA operation, close device */
    
    /* Disable IRQ source */
    irq_ioctl(dev_irq, IRQ_DISABLE_SOURCE, VIC_DMA1);
    
    /* Remove IRQ  handler */
    irq_ioctl(dev_irq, IRQ_REMOVE_HANDLER, VIC_DMA1);
        
    /* Disable global IRQ bit */
    irq_ioctl(dev_irq, IRQ_GLOBAL_ENABLE, 0);
    
    /* Close SSP */
    ssp_close(dev_ssp);
    
    /* Close IRQ */
    irq_close(dev_irq);
    
    return 1;
}



#ifdef __iar

void main(void)
{
	c_entry();
	while(1);
}

#endif