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by Abhishek
Mon Jun 11, 2012 7:48 am
Forum: User Projects
Topic: STM32F4 Discovery MP3 player working - with source code
Replies: 15
Views: 45647

Re: STM32F4 Discovery MP3 player working - with source code

I tested your code a week ago. Works great, however 44.1 kHz doesn't seem to be working right, I get lower pitch and slow playback speed, and about 80% of my mp3 collection is in 44.1kHz! With some quick calculations I figured out that with the default settings for PLLI2S (PLLI2S VCO=86 MHz=258/3), ...
by Abhishek
Sun Jun 10, 2012 3:54 pm
Forum: LCD Driver and Graphic Framework
Topic: GLCD and Touchpad Library
Replies: 137
Views: 35376

Re: GLCD and Touchpad Library

An advice for Backlight PWM control: I tried to use ChibiOS HAL Code to drive my LCD Backlight (PWM pin active low), but it doesn't work properly, backlight flickers, especially in low brightness. If you will try fade effects, it fails miserably. After a few hours, I came up with a solution: bypasse...
by Abhishek
Sun Jun 10, 2012 3:11 pm
Forum: User Projects
Topic: STM32F4 LCD GUI WavePlayer Demo
Replies: 6
Views: 11703

Re: STM32F4 LCD GUI WavePlayer Demo

I've forked your repository:
https://github.com/abhishek-kakkar/ChibiOS-LCD-Driver

I'm currently writing code for S6D1121 initializations. I'll need to test for portrait/landscape Orientations, though.

Maybe we could move all driver related discussions to the 'LCD Driver' thread?
by Abhishek
Sun Jun 10, 2012 2:32 pm
Forum: User Projects
Topic: STM32F4 LCD GUI WavePlayer Demo
Replies: 6
Views: 11703

Re: STM32F4 LCD GUI WavePlayer Demo

Thank you for your appreciations! We could begin by writing a common architecture for LCD initializations: I've observed that all LCD register addresses are 8-bit, so maybe we could use the extra bits to encode, delays in between display charging applications, and end of sequence? We could have some...
by Abhishek
Sun Jun 10, 2012 2:17 pm
Forum: LCD Driver and Graphic Framework
Topic: GLCD and Touchpad Library
Replies: 137
Views: 35376

Re: GLCD and Touchpad Library

Hello people, I have also a simple GUI Library for my 2.4" LCD (S6D1121 controller) in 16-bit bitbang and also a wavePlayer working on my STM32F4 Discovery board. Please see my forum post in the User Projects Section. http://forum.chibios.org/phpbb/viewtopic.php?f=8&t=468&p=4184 @indigo...
by Abhishek
Sun Jun 10, 2012 1:36 pm
Forum: User Projects
Topic: STM32F4 LCD GUI WavePlayer Demo
Replies: 6
Views: 11703

STM32F4 LCD GUI WavePlayer Demo

Hello Giovanni and fellow ChibiOS users, This is my first post at this site. I have been building electronic circuits ever since I was 9 years old. I've been working on the 8051 family(2007-09), AVR family (2010-2011) and lately on the STM32.I came to know about ChibiOS in late 2011 and was followin...

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