參數(shù)資料
型號(hào): VS1001K
廠商: Electronic Theatre Controls, Inc.
元件分類: Codec
英文描述: MPEG AUDIO CODEC
中文描述: MPEG音頻編解碼器
文件頁數(shù): 36/39頁
文件大?。?/td> 415K
代理商: VS1001K
VLSI
Solution
y
DATASHEET
VS1001
K
9. WRITING SOFTWARE
9.6.3
DataWords(), 0x4012
VS DSP C prototype:
u int16 DataWords(void);
If the user has taken over the normal operation of the system by switching the pointer in UserCodec
to point to his own code, he may read data from the Data Interface through this and the following two
functions. This function returns the number of data words (each containing two bytes of data) that can be
read. If there is not enough data available, data acquisition functions GetDataByte() and GetDataWords()
may NOT be called!
9.6.4
GetDataByte(), 0x4013
VS DSP C prototype:
u int16 GetDataByte(void);
Reads and returns one data byte from the Data Interface.
Before calling this function, always check first that there are at least 1 word waiting with function Data-
Words().
9.6.5
GetDataWords(), 0x4014
VS DSP C prototype:
void GetDataWords(register
i0
y u int16 *d, register
a0 u int16 n);
Read
n
data byte pairs and copy them in big-endian format (first byte to MSBs) to
d
.
Before calling this function, always check first that there are at least 1+
n
words waiting with function
DataWords().
Version 4.11,
2003-09-18
36
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