VLSI Solution Oy Evaluation MP3 Player Source Code Documentation

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 00035 void Delay(int milliseconds){ 00036 for (;milliseconds;milliseconds--){ /* for n times do: */ 00037 InitiateDelay (1000); 00038 WaitOutDelay(); /* 1 ms delay */ 00039 } 00040 } 00041 00043 void InitBoard() 00044 { 00045 AUXR = 0x11; /* Take full memory into use */ 00046 MP3_XRESET = 0; /* Put the MP3 chip into reset */ 00047 MMC_OFF = 1; /* Turn mmc power off */ 00048 00049 00050 SPCON = 0xF2; /* Set slow spi clock */ 00051 CKCON0 = 0x01; /* CPU x 2, timer2 x 1 */ 00052 IEN0 = 0; /* Disable all interrupts */ 00053 00054 BDRCON = 0x1F; /* Set uart for 115200,8n1 */ 00055 PCON = 0x80; /* Double Baud Rate */ 00056 BRL = 248; 00057 SCON = 0x50; /* Serial Port Control Register */ 00058 TI = 1; 00059 00060 ConsoleWrite ("\r\r\rBoard: Console is up.\r"); 00061 00062 00063 TMOD = 1; 00064 00065 00066 RCAP2H = 143; /* Set timer2 for 128 interrupts in second */ 00067 RCAP2L = 89; 00068 TH2 = 143; 00069 TL2 = 89; 00070 T2CON = 0; 00071 T2MOD = 0; 00072 00073 TR2 = 1; /* Start timer2 */ 00074 // ET2 = 1; /* Enable timer2 interrupts */ 00075 00076 P2 = 0xEF; 00077 P3 = 0xFF; 00078 00079 InitiateDelay(0); /* Initialize the Delay System */ 00080 00081 ConsoleWrite ("Init: Board; supports: AT89C51RD2, MMC, VS10xx, RS232\r"); 00082 00083 00084 // EA = 1; /* Global enable for interrupts */ 00085 } 00086 00087 00088

board.c