VLSI Solution Oy VLSI Solution Oy Evaluation MP3 Player Source Code Documentation

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board.c

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00001 00005 #include "board.h" 00006 #include "lcd.h" 00007 00008 00010 union Temp { 00011 unsigned char c; 00012 unsigned int i; 00013 unsigned long l; 00014 } temp; 00015 00016 00018 unsigned char SPIGetChar(){ 00019 SPIPutCharWithoutWaiting(0xff); /* send 0xff */ 00020 SPIWait(); /* wait for the byte to transfer */ 00021 return SPI_RESULT_BYTE; /* Return the received byte */ 00022 } 00023 00024 00026 void SPI8Clocks(unsigned char nClocks){ 00027 while (nClocks--){ 00028 SPIPutCharWithoutWaiting(0xff); 00029 SPIWait(); 00030 } 00031 } 00032 00033 00036 void Delay(int milliseconds){ 00037 for (;milliseconds;milliseconds--){ /* for n times do: */ 00038 InitiateDelay (1000); 00039 WaitOutDelay(); /* 1 ms delay */ 00040 } 00041 } 00042 00044 void InitBoard() 00045 { 00046 AUXR = 0x11; /* Take full memory into use */ 00047 00048 Mp3PutInReset(); 00049 00050 // MP3_XRESET = 0; /* Put the MP3 chip into reset */ 00051 00052 MMC_OFF = 1; /* Turn mmc power off */ 00053 00054 00055 SPCON = 0xF2; /* Set slow spi clock */ 00056 CKCON0 = 0x01; /* CPU x 2, timer2 x 1 */ 00057 IEN0 = 0; /* Disable all interrupts */ 00058 00059 BDRCON = 0x1F; /* Set uart for 115200,8n1 */ 00060 PCON = 0x80; /* Double Baud Rate */ 00061 BRL = 248; /* 248 for 115200 */ 00062 SCON = 0x50; /* Serial Port Control Register */ 00063 TI = 1; 00064 00065 ConsoleWrite ("\r\r\rBoard: Console is up.\r"); 00066 00067 00068 TMOD = 1; 00069 00070 00071 RCAP2H = 143; /* Set timer2 for 128 interrupts in second */ 00072 RCAP2L = 89; 00073 TH2 = 143; 00074 TL2 = 89; 00075 T2CON = 0; 00076 T2MOD = 0; 00077 00078 TR2 = 1; /* Start timer2 */ 00079 // ET2 = 1; /* Enable timer2 interrupts */ 00080 00081 // P2 = 0xEF; 00082 //P3 = 0xFF; 00083 00084 InitiateDelay(0); /* Initialize the Delay System */ 00085 00086 ConsoleWrite ("Init: Board; supports: AT89C51RD2, MMC, VS10xx, RS232\r"); 00087 00088 00089 // EA = 1; /* Global enable for interrupts */ 00090 } 00091 00092 00093

All software copyright 2000-2004 VLSI Solution OY. Redistribution of these software modules are limited to promotional use only and only with the VS1011 / VS1002 / VS1003 MP3-Evakit evaluation boards. Free or commercial use of these software modules in MP3 players is ok if the product includes MP3 decoder chip(s) from VLSI. You can request the complete (compilable) package from mp3@vlsi.fi