amf_buttoncontrol.c

来自「ADI SHARC DSP 音频算法标准模块库」· C语言 代码 · 共 117 行

// Copyright(c) 2005 Analog Devices, Inc. All Rights Reserved.
// This software is proprietary and confidential to Analog Devices, Inc. and its licensors.

// File    : $Id: //depot/Development/VisualAudio/Modules/Packs/ButtonsAndLEDs_EZKit/2.5.0/SHARC/Source/AMF_ButtonControl.c#2 $ 
// Part of : VisualAudio ButtonsAndLEDs_EZKit V2.0.1 
// Updated : $Date: 2006/10/12 $ by $Author: Fernando $



#include "AMF_ButtonControl.h"
#include <math.h>
#include "processor.h"
#include <sysreg.h>

#if __VERSIONNUM__ >= 0x07010000  //VDSP++4.0 or later
#if defined(__ADSP21364__) || defined(__ADSP21365__) || defined(__ADSP21366__)
#include <sru21365.h>
#endif
#if defined(__ADSP21369__) || defined(__ADSP21368__) || defined(__ADSP21367__)
#include <sru21369.h>
#endif
#if defined(__ADSP21262__) || defined(__ADSP21267__) || defined(__ADSP21266__)
#include <sru21262.h>
#endif
#endif

#if __VERSIONNUM__ >= 0x07000000 && __VERSIONNUM__ < 0x07010000 // VDSP++ 3.5 
#include <sru.h> 
#endif

/** Read a named integer port. */
#define RDPORT(name)    (*(const int*)(name))

void AMF_ButtonControl_Render(AMF_ButtonControl * restrict instance,float * restrict * buffers,int tickSize);

#if defined(__ADSP21369__) || defined(__ADSP21368__) || defined(__ADSP21367__)
#define GET_FLAG1_STATE(flags) (flags >> 2) & 0x1
#define GET_FLAG0_STATE(flags) (flags & 0x1)
#else
#define GET_FLAG1_STATE(flags) (flags >> 2) & 0x1
#define GET_FLAG0_STATE(flags) (flags >> 4) & 0x1
#endif

#define GET_BUTTON1_STATE(flags) GET_FLAG1_STATE(flags)
#define GET_BUTTON2_STATE(flags) GET_FLAG0_STATE(flags)
#define GET_BUTTON3_STATE(value) (value >> 18) & 0x1//(value & 0x40000)
#define GET_BUTTON4_STATE(value) (value >> 19) & 0x1//(value & 0x80000)

SEG_MOD_FAST_CODE  void AMF_ButtonControl_Render(AMF_ButtonControl * restrict instance,AMF_Signal * restrict * buffers,int tickSize) 
{
/***
    Design spec:
        The button state is scaned every time the render function is called.
        This is as "scanning" mechanism, an "asynchrous polling" which
        means the function does not wait for the polling status.
        
        The first 2 buttons are connected to the flag pins and the other 2
        buttons are hookup to the processor via the digital interface
***/    
    int i;
    AMF_Signal *pButton1Output = buffers[0];
    AMF_Signal *pButton2Output = buffers[1];
    AMF_Signal *pButton3Output = buffers[2];
    AMF_Signal *pButton4Output = buffers[3];
       int flagValue;
      int sruPinValue;

    //The initialization is required only once
    if (!instance->initialized)
    {
        //Dynamically configure the digital interface

        //setting up the button
        //assign pin buffer 19 low so it is an input
        SRU(LOW,DAI_PB19_I);

        //assign pin buffer 20 low so it is an input
        SRU(LOW,DAI_PB20_I);
        
       
        //Pin Buffer Disable in SRU_PINEN0 (Group F)
        //assign pin 19 low so it is an input
        SRU(LOW,PBEN19_I);
    
        //assign pin 20 low so it is an input
        SRU(LOW,PBEN20_I);   
        instance->initialized = 1;
    }
       flagValue = sysreg_read(sysreg_FLAGS);
      sruPinValue = RDPORT(DAI_PIN_STAT);

    *pButton1Output = GET_BUTTON1_STATE(flagValue) ? 1 : 0;
    *pButton2Output = GET_BUTTON2_STATE(flagValue) ? 1 : 0;
    *pButton3Output = GET_BUTTON3_STATE(sruPinValue) ? 1 : 0;
    *pButton4Output = GET_BUTTON4_STATE(sruPinValue) ? 1 : 0;
}

SEG_MOD_SLOW_CONST const AMF_ModuleClass AMFClassButtonControl = {
    
    /* Flags */
    0,
     
    /* Render function */
    (AMF_RenderFunction)AMF_ButtonControl_Render,

    /* Default bypass */
    (void *)0,
    
    /* Input descriptor - no inputs. */
    0, 0,

    /* Output descriptor - 4 outputs, and it is mono. */
    4, AMF_ControlPin(0)|AMF_ControlPin(1)|AMF_ControlPin(2)|AMF_ControlPin(3),
};