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

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board.c File Reference

Board related utility functions such as delay(). More...

#include "board.h"
#include "lcd.h"

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Classes

union  Temp
 Generic temp variable for non-reentrant main routines. More...


Functions

unsigned char SPIGetChar ()
 Send 8 ones to SPI bus and receive the result byte.

void SPI8Clocks (unsigned char nClocks)
 Send nClocks x 8 clock transitions with MOSI=1 (0xff).

void Delay (int milliseconds)
 Busy loop delay function.

void InitBoard ()
 Startup initialization of the microcontroller board.


Variables

Temp temp
 Generic temp variable for non-reentrant main routines.

Detailed Description

Board related utility functions such as delay().

Definition in file board.c.

Function Documentation

void Delay (  int  milliseconds  ) 
 

Busy loop delay function.

Creates n times 1 ms hardware delays

Definition at line 35 of file board.c.

References InitiateDelay, and WaitOutDelay.

Referenced by InitMMC(), LcdPrintGenericResult(), LoadPatch(), Mp3Reset(), Mp3SoftReset(), RebootMMC(), Record(), and VsSineTest(). 

00035                             {
00036   for (;milliseconds;milliseconds--){  /* for n times do: */
00037     InitiateDelay (1000);
00038     WaitOutDelay(); /* 1 ms delay */
00039     }
00040 }

void InitBoard (   ) 
 

Startup initialization of the microcontroller board.

Definition at line 43 of file board.c.

References InitiateDelay, MMC_OFF, and MP3_XRESET.

Referenced by main(). 

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 }

void SPI8Clocks (  unsigned char  nClocks  ) 
 

Send nClocks x 8 clock transitions with MOSI=1 (0xff).

Definition at line 26 of file board.c.

References SPIPutCharWithoutWaiting, and SPIWait.

Referenced by MmcCommand(), MmcWaitForData(), ReadPhysicalSector(), and WritePhysicalSector(). 

00026                                       {
00027   while (nClocks--){
00028     SPIPutCharWithoutWaiting(0xff);
00029     SPIWait();
00030   }
00031 }

unsigned char SPIGetChar (   ) 
 

Send 8 ones to SPI bus and receive the result byte.

Definition at line 18 of file board.c.

References SPI_RESULT_BYTE, SPIPutCharWithoutWaiting, and SPIWait.

Referenced by ConsoleDecipherMMCResponse(), MmcCommand(), MmcGetData(), MmcWaitForData(), and WritePhysicalSector(). 

00018                           {
00019   SPIPutCharWithoutWaiting(0xff); /* send 0xff */
00020   SPIWait(); /* wait for the byte to transfer */
00021   return SPI_RESULT_BYTE; /* Return the received byte */
00022 }

Variable Documentation

union Temp temp
 

Generic temp variable for non-reentrant main routines.

Referenced by BuildFragmentTable(), FatInitGlobals(), GetAVIBlock(), InitMMC(), LoadPatch(), main(), OpenFile(), Record(), SendZerosToVS10xx(), UpdateDisplay(), and WriteClusterChain().

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