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VS1011E play code
Hello , I'm designing an mp3 using vs1011E, sd card and xmega256A3, getting this thing to play correctly is workin' my last nerve. I can init. / control the SD card,and the '...
Tue. Nov 17, 2009 - 12:12 AM
XMEGA256 Driving LED
I'm trying to drive a std. LED using an XMEGA256 at 3.2V uC isn't connected to or doing anything else. Using latest WinAvr and PN. The code is: PORTF_DIRSET = 0x80;...
Thu. Nov 5, 2009 - 02:19 AM
VS1011 + SD card + SPI loading
MP3 pjt. using m644, vs1011E and 2 GB sd card all at 3.2V ( 8mhz uC ). uCVS1011 works!! uC SD card works too, but when i tie all 3 together, the SD card doesn't work( doesn't read...
Thu. Oct 22, 2009 - 12:32 AM
Buffer for SD card
I'm using a m644 and I want to reserve the 1st 512 bytes of sram to buffer 1 FAT sector of an SD card and also 6 sectors for mp3 data using Winavr ( 20090313 ). How do I do this...
Sat. Oct 10, 2009 - 06:16 AM
STA013 ident problem ( $87 not $AC )
This is the inc file for yet another mp3 player. Iuse an m644 1Mhz and sta013 at 3.2V, avrstd 4.15. twbr=30d 10mS reset applied in asm code, and 50ms delay after that ( P.Stang...
Sun. Sep 27, 2009 - 06:09 PM
m644 TWINT won't set
I'm using std 4.15 and my m644 is connected to a sta013 at 3.2V. The twint bit never sets. But this code worked on an m8535!!! twi_start: push r18 push r11 in r11,...
Sun. Sep 27, 2009 - 01:27 AM
SD card and Winhex
I'm viewing a 2 GB SD card via WinHex and when i view it as a logical drive sector 0 is filled w/ #s ( MBR ?, right ). Viewed as a physical drive, sector 0 only has #s in the...
Wed. Sep 9, 2009 - 04:50 PM
Bad simulator result ( stack o.flow )
I'm using AVR studio 4.15 build 623, and I get a "uninitialized stack pointer at x0053" when sd_cmd is called in the simulator the 1st time. Then as the code continues sim. just...
Wed. Sep 9, 2009 - 01:35 AM
Fuses
I have a ckt that was working fine then spontaneously started acting up. I use a mega16 and a 10k pullup on /rst. I use PC3 ( TMS ) to PWM leds thru a cable. I disconnect the LEDs...
Fri. Apr 3, 2009 - 08:27 AM
TWI bit of a problem
I'm I/F'ing a m8535 w/ a max7310 8 bit expander using TWI. I've isolated the problem already but I don't understand WHY it's wrong. I've showed where in code it is to save you...
Tue. Jan 13, 2009 - 06:56 PM
IDE Interface
1)I'm trying to build an IDE I/F using a m162 and a 2.5" HD. When I try to set the sector cnt reg = 1 and set drive reg = $E0, i don't think it works. When i do a read of each reg...
Tue. Nov 18, 2008 - 11:46 PM
LCD 4 line initialization problem
I have a 20 x 4 LCD ( industry std. Hitachi HD' ). When I set it for 2 line display, i can print anything i want to the 1st and 3rd rows ( w/ all columns ). So, my LCD code and uC...
Wed. Jan 16, 2008 - 06:16 AM

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