VLSI Solution Oy Evaluation MP3 Player Source Code Documentation

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 }


Classes
union	Temp
	Generic temp variable for non-reentrant main routines. More...
Defines
#define	MP3_XRESET P2_4
	Chip Reset.
#define	Mp3PutInReset() {MP3_XRESET=0;}
	Put the MP3 player chip in reset.
#define	Mp3ReleaseFromReset() {MP3_XRESET=1;}
	Release the MP3 player chip from reset.
#define	MP3_XCS P2_3
	Control Chip Select (for accessing SPI Control/Status registers).
#define	Mp3SelectControl() {MP3_XCS=0;}
	Pull the VS10xx Control Chip Select line Low.
#define	Mp3DeselectControl() {MP3_XCS=1;}
	Pull the VS10xx Control Chip Select line High.
#define	MP3_XDCS P2_5
	Data Chip Select / BSYNC.
#define	Mp3SelectData() {MP3_XDCS=0;}
	Pull the VS10xx Data Chip Select line Low.
#define	Mp3DeselectData() {MP3_XDCS=1;}
	Pull the VS10xx Data Chip Select line High.
#define	MP3_DREQ P3_2
	Data Request: Player asks for more data.
#define	RED_LED P3_3
	Red LED in multicolor LED, 0 = on, 1 = off.
#define	GREEN_LED P3_7
	Green LED in multicolor LED, 0 = on, 1 = off.
#define	LED_ON 0
	LED is active low.
#define	LED_OFF 1
	LED is inactive high.
#define	KEY_BUTTON !(P1_2)
	Center push-button, 1 when pressed.
#define	KEY_FARRIGHT !(P1_1)
	Far-left key, 1 when pressed.
#define	KEY_RIGHT !(P1_0)
	Left key, 1 when pressed.
#define	KEY_LEFT !(P1_3)
	Right key, 1 when pressed.
#define	KEY_FARLEFT !(P3_4)
	Far-right key, 1 when pressed.
#define	LCD_DATABUS P0
	LCD Data pins are connected to DATA bus (P0).
#define	LCD_RS P2_0
	LCD Register Select: 0=Control, 1=Data.
#define	LCD_ENABLE P2_2
	LCD Clock Pulse (Active high).
#define	LCD_RW 0
	LCD is only in write mode, read not possible.
#define	LCD_COMMAND_MODE 0
	LCD RS is 0 in LCD Command Mode.
#define	LCD_DATA_MODE 1
	LCD RS is 1 in LCD Data Mode.
#define	RSEN P2_1
	RS-232 Buffer Enable.
#define	YES 1
	YES = 1.
#define	NO 0
	NO = 0.
#define	MMC_OFF P2_7
	MMC Off (MMC Power Off).
#define	MMC_XCS P2_6
	MMC Chip Select (Active Low).
#define	MMC_SELECTED 0
	MMC is selected when MMC_XCS is low.
#define	MMC_NOT_SELECTED 1
	MMC is not selected when MMC_XCS is high.
#define	ClearPCAOverflow() {CCON &= 0x7f;}
	Clear PCA core counter overflow flag.
#define	PCARun() {CCON \|= 0x40;}
	Start Programmable Counter Array core counter.
#define	PCAHalt() {CCON &= 0xBF;}
	Stop Programmable Counter Array core counter.
#define	PCAHaltAndClearOV() {CCON &= 0x3F;}
	Stop PCA core counter and clear overflow flag.
#define	SetPCAValue(v) {CH = ((unsigned)(v)) >> 8; CL = (v) & 0xff;}
	Set PCA core counter value.
#define	SetPCADelayValue(microseconds) {SetPCAValue(65535-(unsigned int)((microseconds)/0.4069010));}
	Calculate and set Time-Until-Overflow to PCA in microseconds.
#define	InitiateDelay(microseconds) {PCAHaltAndClearOV(); SetPCADelayValue(microseconds); PCARun();}
	Initiate Delay of n microseconds.
#define	WaitOutDelay() {while (!(CCON & 0x80));}
	Busy loop until the end of the delay time.
#define	SPISetFastClock() {SPCON=0x71;} /* 0x73 is much slower*/
	switch to fast SPI Clock
#define	SPIWait() {while(!(SPSTA & 0x80));;}
	Wait for SPI ready to send a new character (previous sent).
#define	SPIPutChar(c) {SPIWait();SPDAT=(c);}
	Wait for SPI ready, then initiate character sending.
#define	SPIPutCharWithoutWaiting(c) {SPDAT=(c);}
	Initiate SPI character sending.
#define	SPI_RESULT_BYTE SPDAT
	SPI data return register.
#define	Public
	"Public" has no code meaning but it is meant for the programmer to remember that this function is called from outside the module
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.

board.h File Reference

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Defines

Functions

Variables

Detailed Description

Define Documentation

Function Documentation

Variable Documentation