我的程序如下，现象是无法向iis的iisfif寄存器写入wav数据，不知道为什么？
#include "44b.h"
#define uint16 unsigned short int
#define uint32 unsigned long int
#define IIS_fifoready ((rIISCON&0x80)==0x0)
//wav_play函数
void wav_play(uint32 wavaddress)
{
//定义局部变量
uint32 i;
uint16 *WavComment;
WavComment=(uint16 *)wavaddress;
WavComment+=0x2800;
/*初始化IIS*/
rCLKCON=0x7ff8;/*允许IIS时钟和GPIO时钟*/
/*rPCONC=0x000000ff;//设置GPIO管脚为IIS功能脚
rPUPC=0x???;//禁止上拉的功能*/
rPLLCON=(0x69<<12)|(0x17<<4)|0;//设置MCLK=45.1584MHZ*/
rIISCON=0x02;//dma disable;iisclk generate;prescaler enable
rIISMOD=0x89;//master mode;transmit mode;low for left channel;iis compatible format;8 bits;256fs;32fs
rIISPSR=0x33;//division factor=3
rIISFCON=0x200;//normal access mode;fifo enable;
//开始IIS操作
rIISCON|=0x1;
while(i<0xffffff)
{
if(IIS_fifoready)
{
for(i=0;i<8;i++)
{*IISFIF = (*WavComment);
WavComment++;}
}
}
}
void IIS_play(void)
{
//定义wav特性的数据结构
/*struct {
uint32 wavsize;
uint16 wavChannels;
uint32 wavSamplesPerSec;
uint32 wavAvgBytesPerSec;
uint16 wavBitsPerSample;
}wavspec;
*/
uint32 address=0x0c100000;
UART_Init();
wav_play(address);/*0x0c100000为音乐文件的首地址*/
}
/**************LED实验***************/
void Delay(int a)
{
int b;
for(b=0;b<=a;b++)
;
}
void Led_Display(void)
{
rPDATC = 0x22;
Delay(1000000);
rPDATC = 0x40;
Delay(1000000);
rPDATC = 0x44;
Delay(1000000);
}
/*进行GPIO口的初始化*/
void Gpio_Init(void)
{
rPCONA=0x1FF;
/* rPDATA= */
rPCONB=0x7FF;
/* rPDATB= */
rPCONC=0xFFFA0054;
rPUPC=0xFCFD;
/* rPDATC= */
rPCOND=0xAA00;
rPUPD=0xFF;
/* rPDATD= */
rPCONE=0x20428;
rPUPE=0xFF;
/* rPDATE= */
rPCONF=0x249000;
rPUPF=0x1FF;
/* rPDATF= */
rPCONG=0x0000;
rPUPG=0xFF;
/* rPDATG= */
rSPUCR=0x7;
/* rEXTINT=
rEXTINTPND= */
}
/****************************************************************************
【功能说明】系统主函数
****************************************************************************/
void Main(void)
{
while(1)
{ Gpio_Init();
Led_Display();
IIS_play();
}
}
|
楼主
标题置顶
标题高亮
