main.c File Reference

Butterfly MP3 main. More...

#include <avr/io.h>
#include <avr/pgmspace.h>
#include <avr/interrupt.h>
#include "main.h"
#include "types.h"
#include "uart.h"
#include "delay.h"
#include "vs1001.h"
#include "mmc.h"
#include "avrfat16.h"
#include "timer0.h"
#include "button.h"
#include "eeprom.h"
#include "lcdgraphics.h"
#include "power.h"
#include "utils.h"
#include "BCD.h"

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Functions
const uint8	__attribute__ ((progmem))
	setup volume levels 0 1 2 3 4 5 6 7 8 9
void	flush_decoder (char reset_type)
	flush_decoder
void	cue_file (void)
	cue_file
void	streaming (void)
	Data Streaming.
void	handle_interface (void)
	handle_interface
void	update_LCD (void)
	update_LCD
void	mainTimer (void)
uint8	init_mmc_fat (void)
	init_mmc_fat
uint8	handle_mmc (uint8 MMC_present)
	handle_mmc
void	init_HW (void)
	init_HW
uint8	open_Dir (uint32 dir_lba)
uint8	restore_player (void)
	restore_player
void	play_track_number (uint8 num)
	play_track_number
void	volume_up (void)
void	volume_down (void)
int	main (void)
	main
Variables
const char VERSIONINFO1[]	PROGMEM = "ButterflyMP3_sf_net V0.7"
	tag rom with verion info
uint8	gmusic_vol = 5
	music volume.
volatile uint8	gbass_boost = 0
	bass boost off.
volatile uint8	gFastForward = 0
	Fast forward mode.
uint8	gMode = 0
	mode of player, idle, playing, off, etc
char	gLCD_Refresh
	Update LCD.
uint32	gFAT_entry = 0
	global current entry number in FAT table. (aka file number)
uint32	gCluster
	current cluster in song
uint32	gFileSectorSize
	size of current file in complete sectors.
uint32	gFileSectorsPlayed
	number of full sectors played. (aka position)
char	gFile_good
	File has been read from Fat and ready to go.
char	cluster_pos = 0
	position in cluster
char	buff_pos = 16
	position in buffer
volatile uint16	gPlayTimeSeconds
	# of seconds current file has been playing.
uint8	gDisplayTimeOut = 0
	# of seconds+1 before changing display;

---

Detailed Description

Butterfly MP3 main.

Author:

Nick Lott

Date:

November 2004

Id:

main.c,v 1.60 2009/01/19 23:36:08 brokentoaster Exp

Definition in file main.c.

---

Function Documentation

const uint8 __attribute__

(

(progmem)

)

setup volume levels 0 1 2 3 4 5 6 7 8 9

Definition at line 96 of file main.c.

Referenced by __attribute__().

void cue_file

(

void

)

cue_file

Gets file info for file pointed to by gFAT_entry and inits MP3 chip. Checks for MMC card as well. Reads ID3v2 tag for title and artist If successful then gFile_good is set

Definition at line 481 of file main.c.

References buff_pos, cluster_pos, EOL, FALSE, FAT16_dir_first_sector, FAT16_filetype, FAT16_LFNArtistLen, FAT16_LFNTitleLen, FAT16_longfilename, FAT16_sectors_per_cluster, FAT_buffer, FAT_NextCluster(), FAT_readCluster(), FAT_readFile(), FAT_scratch, FAT_Scratch2Cluster(), FILE_TYPE_DIR, flush_decoder(), gCluster, gFAT_entry, gFile_good, gFileSectorSize, gFileSectorsPlayed, gPlayTimeSeconds, LFN_ARTIST_INDEX, LFN_ARTIST_LENGTH, LFN_TITLE_INDEX, LFN_TITLE_LENGTH, LFN_TYPE_ID3_ARTIST, LFN_TYPE_ID3_TITLE, LFN_TYPE_INDEX, PRINT, SOFT_RESET, strLen(), TRUE, and UART_Printfu32().

Referenced by handle_interface(), open_Dir(), play_track_number(), restore_player(), and streaming().

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void flush_decoder

(

char

reset_type

)

flush_decoder

Resets the decoder and prepares it for a new stream of audio data. all setup params must be resent.

Definition at line 432 of file main.c.

References gbass_boost, gFastForward, gmusic_vol, SCI_CLOCKF, SCI_MODE, SM_SDINEW, vs1001_read(), vs1001_reset(), vs1001_write(), and vs_1001_setvolume().

Referenced by cue_file(), handle_interface(), and streaming().

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void handle_interface

(

void

)

handle_interface

Scans for button presses and change activity accordingly

Definition at line 997 of file main.c.

References cue_file(), EOL, FAT16_dir_first_sector, FAT16_entryMAX, FAT16_entryMIN, FAT16_filetype, FAT_cluster2lba(), FAT_getNextSong(), FAT_getParentDir(), FAT_getPrevSong(), FAT_readFile(), FAT_Scratch2Cluster(), FILE_TYPE_DIR, flush_decoder(), gCluster, getkey(), gFastForward, gFAT_entry, gFile_good, gLCD_Refresh, gMode, gPowerSaveTimer, KEY_ENTER, KEY_JOYSTICKMAX, KEY_MINUS, KEY_NEXT, KEY_NULL, KEY_PLUS, KEY_PREV, MODE_IDLE, MODE_PAUSE, MODE_PLAY, MODE_STOP, open_Dir(), play_track_number(), Power_off(), PRINT, SAMPLEMODE_ALLBUTONS, SCAN_JUMPTOSTART, SOFT_RESET, TRUE, UART_HasChar(), UART_Printfu08(), UART_ReceiveByte(), volume_down(), volume_up(), and vs1001_sine_test().

Referenced by main().

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uint8 handle_mmc

(

uint8

MMC_present

)

handle_mmc

Check for MMC insertion/removal

Parameters:

old	status of MMC

Returns:

new status of MMC

Definition at line 881 of file main.c.

References EOL, FALSE, FAT16_entryMAX, FAT16_entryMIN, gFAT_entry, gFile_good, gLCD_Refresh, gMode, gPowerSaveTimer, init_mmc_fat(), MMC_Check(), MMC_Detect(), MMC_Reset(), MODE_IDLE, MODE_STOP, PRINT, and TRUE.

Referenced by main(), and restore_player().

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void init_HW

(

void

)

init_HW

Initialize basic hardware for the butterfly.

Definition at line 142 of file main.c.

References Button_Init(), EOL, FAT16_entryMAX, FAT16_entryMIN, FAT_buffer, FAT_read, FAT_scratch, gmusic_vol, LCD_Initialize(), load_player_options(), mainTimer(), MMC_Read(), mmc_sbuf, mmc_scratch, Power_check(), Power_Init(), PRINT, PWR_MIN_V, SpiInit(), Timer0_Init(), Timer0_RegisterCallbackFunction(), UART_Init(), vs1001_init_chip(), vs1001_init_io(), and vs_1001_setvolume().

Referenced by main().

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uint8 init_mmc_fat

(

void

)

init_mmc_fat

Returns:

error from MMC or fat initialization or 0 for everything okay

initialize the mmc and read fat/partition details from the disk. Needs to be run everytime MMC is changed.

Definition at line 401 of file main.c.

References EOL, FAT16_entryMAX, FAT16_entryMIN, FAT16_root_dir_first_sector, FAT_initFat16(), gFAT_entry, MMC_Reset(), open_Dir(), and UART_Printfu32().

Referenced by handle_mmc().

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int main

(

void

)

main

The guts.

Returns:

int (never returns)

Definition at line 1294 of file main.c.

References AUTOPOWEROFF_TIMEOUT, DREQ_PIN, DREQ_PORT, gLCD_Refresh, gMode, gPowerSaveTimer, handle_interface(), handle_mmc(), init_HW(), MODE_IDLE, MODE_PLAY, Power_idle(), Power_off(), restore_player(), streaming(), TRUE, and update_LCD().

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void mainTimer

(

void

)

do stuff every second in here

Definition at line 202 of file main.c.

References AUTOPOWEROFF_TIMEOUT, BUTTON_TIMEOUT_VALUE, EOL, gButtonTimeout, gDisplayTimeOut, gLCD_Refresh, gMode, gPlayTimeSeconds, gPowerSaveTimer, LCD_FileName(), MODE_PAUSE, MODE_PLAY, Power_check(), PRINT, PWR_ABS_MIN_V, PWR_GOOD_V, PWR_LOW_V, PWR_MIN_V, save_player_options(), save_player_state(), TIMER0_TICKSPERSECOND, and TRUE.

Referenced by init_HW().

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uint8 open_Dir

(

uint32

dir_lba

)

Definition at line 314 of file main.c.

References cue_file(), FAT16_entryMIN, FAT_scanDir_lba(), gFAT_entry, LCD_FileName(), LCD_Scanning(), and TRUE.

Referenced by handle_interface(), init_mmc_fat(), and restore_player().

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void play_track_number

(

uint8

num

)

play_track_number

will find and play the track whos filename starts with 'nn' where nn is a number from 00-99 with a leading zero

Definition at line 940 of file main.c.

References CHAR2BCD2(), cue_file(), FAT16_dir_first_sector, FAT_getNumberedSong(), gCurrentSongNum, gFAT_entry, gLCD_Refresh, gMode, MODE_PLAY, SAMPLEMODE_CONTROLOUT_PIN, SAMPLEMODE_CONTROLOUT_PORT, and TRUE.

Referenced by handle_interface().

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uint8 restore_player

(

void

)

restore_player

Returns:

MMC Card Status

Restore the player state from eeprom if possible

Definition at line 341 of file main.c.

References cue_file(), FALSE, FAT16_entryMIN, FAT_getNextSong(), gCluster, gFAT_entry, gFileSectorsPlayed, gLCD_Refresh, gMode, gPlayTimeSeconds, handle_mmc(), load_player_state(), MODE_IDLE, MODE_PAUSE, open_Dir(), and TRUE.

Referenced by main().

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void streaming

(

void

)

Data Streaming.

Take care of feeding data to mp3 chip and reading mmc in free time. AKA playing.

Definition at line 798 of file main.c.

References buff_pos, cluster_pos, cue_file(), DREQ_PIN, DREQ_PORT, FALSE, FAT16_dir_first_sector, FAT16_entryMIN, FAT16_filetype, FAT16_sectors_per_cluster, FAT_buffer, FAT_getNextSong(), FAT_NextCluster(), FAT_readCluster(), FILE_TYPE_DIR, flush_decoder(), gCluster, gFAT_entry, gFile_good, gFileSectorsPlayed, gLCD_Refresh, gMode, MMC_Reset(), MODE_PLAY, MODE_STOP, PLAY_NEXT_SONG, PLAY_REPEAT_ALL, RECURSE_DIRECTORIES, SAMPLEMODE_CONTROLOUT_PIN, SAMPLEMODE_CONTROLOUT_PORT, SOFT_RESET, TRUE, and vs1001_send_32().

Referenced by main().

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void update_LCD

(

void

)

update_LCD

Update the display depending on mode.

Definition at line 1180 of file main.c.

References FALSE, gbass_boost, gDisplayTimeOut, gFAT_entry, gLCD_Refresh, gMode, gmusic_vol, gPlayTimeSeconds, LCD_Battery(), LCD_Blank(), LCD_FileName(), LCD_Pause(), LCD_Play(), LCD_Stop(), LCD_Tester(), LCD_Time(), LCD_Vol(), MODE_IDLE, MODE_PAUSE, MODE_PLAY, MODE_STOP, Power_check(), Power_pcnt(), and STAT_DISPLAY_TIME.

Referenced by main().

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void volume_down

(

void

)

Definition at line 982 of file main.c.

References gLCD_Refresh, gmusic_vol, TRUE, and vs_1001_setvolume().

Referenced by handle_interface().

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void volume_up

(

void

)

Definition at line 973 of file main.c.

References gLCD_Refresh, gmusic_vol, TRUE, and vs_1001_setvolume().

Referenced by handle_interface().

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Variable Documentation

char buff_pos = 16

position in buffer

Definition at line 84 of file main.c.

Referenced by cue_file(), and streaming().

char cluster_pos = 0

position in cluster

Definition at line 83 of file main.c.

Referenced by cue_file(), and streaming().

volatile uint8 gbass_boost = 0

bass boost off.

Definition at line 71 of file main.c.

Referenced by flush_decoder(), and update_LCD().

uint32 gCluster

current cluster in song

current sector (cluster) in song main.h

Definition at line 79 of file main.c.

Referenced by cue_file(), FAT_Scratch2Cluster(), handle_interface(), restore_player(), save_player_state(), and streaming().

uint8 gDisplayTimeOut = 0

# of seconds+1 before changing display;

Definition at line 93 of file main.c.

Referenced by mainTimer(), and update_LCD().

volatile uint8 gFastForward = 0

Fast forward mode.

Definition at line 72 of file main.c.

Referenced by flush_decoder(), and handle_interface().

uint32 gFAT_entry = 0

global current entry number in FAT table. (aka file number)

Definition at line 78 of file main.c.

Referenced by cue_file(), handle_interface(), handle_mmc(), init_mmc_fat(), open_Dir(), play_track_number(), restore_player(), save_player_state(), streaming(), and update_LCD().

char gFile_good

File has been read from Fat and ready to go.

Definition at line 82 of file main.c.

Referenced by cue_file(), handle_interface(), handle_mmc(), and streaming().

uint32 gFileSectorSize

size of current file in complete sectors.

Definition at line 80 of file main.c.

Referenced by cue_file().

uint32 gFileSectorsPlayed

number of full sectors played. (aka position)

Definition at line 81 of file main.c.

Referenced by cue_file(), restore_player(), save_player_state(), and streaming().

char gLCD_Refresh

Update LCD.

Definition at line 76 of file main.c.

Referenced by handle_interface(), handle_mmc(), main(), mainTimer(), play_track_number(), restore_player(), streaming(), update_LCD(), volume_down(), and volume_up().

uint8 gMode = 0

mode of player, idle, playing, off, etc

Definition at line 75 of file main.c.

Referenced by handle_interface(), handle_mmc(), LEDMatrix_timer(), main(), mainTimer(), play_track_number(), restore_player(), save_player_state(), streaming(), and update_LCD().

uint8 gmusic_vol = 5

music volume.

Definition at line 70 of file main.c.

Referenced by flush_decoder(), init_HW(), load_player_options(), save_player_options(), update_LCD(), volume_down(), and volume_up().

volatile uint16 gPlayTimeSeconds

# of seconds current file has been playing.

Definition at line 92 of file main.c.

Referenced by cue_file(), mainTimer(), restore_player(), save_player_state(), and update_LCD().

const char VERSIONINFO2 [] PROGMEM = "ButterflyMP3_sf_net V0.7"

tag rom with verion info

tag rom with compile date and time

Definition at line 60 of file main.c.