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Yampp-3U 

 

Reference Manual

 

Contents 

 

Version 1.10, 

11/10/2005 

 

Page 13 of 13 

5  Power up the player 

 

Here are some VERY IMPORTANT tips when powering the player. 

 

Do not connect the hard disk for the moment. We must verify if the board work perfectly before. 
 

Connect a 7-15V supply to the power connector (J5). DON'T connect your 30 Amps PC supply 

or similar, but use a power supply with current limiting, or use a series resistor of about 22 - 33 

Ohms. This will limit the current to about 50mA.  

 

When the power is connected, D1 should be lit. If not, there's a power short circuit somewhere, 
or the LED is mounted the wrong way. Next, check the VCC* voltage value. This should be near 

to 5V. 

 

But I'll assume that all goes well, and you can probably remove the series resistor. Now check 

the voltage from the LP2980 regulator (IC5). Measure the voltage at the wires between L1/C5 

and L2/C6. You should measure 3.0 Volt. 
 

6  Program the boot loader 

 

Before you can download the firmware via USB, you need to program the player with the boot 

loader code. This has to be done using the in-circuit programming interface, which you can get 
access with the programming connector (J1). 

 

To program the bootloader you will need a piece of Windows software called “YAAP”, a parallel 

port driver software and a programming adapter. You can download the application and the 

parallel port driver here: 

http://www.myplace.nu/avr/yaap/index.htm

. You can download the 

latest version of the boot loader in the software section of this page: 

http://www.myplace.nu/mp3/index2.htm

. If you are using the Nokia display, use the boot loader 

including the character set (V3.00). 

 

 

Step 1: Download and install DLPortIO Driver. 

 

 

Step 2: Download the YAPP application, unzip and copy all the files to a directory of your 
choice. 

 

 

Step 3: Build and connect this programming adaptor to your YAMPP-3U. This 

programming adaptor is derived from the Jesper’s Original programming adaptor. 

 

PROG

J1

1

3

5

7

9

2

4

6

8

10

SCK

MOSI

GND

RST

MISO

R1

R2

R3

R4

R1 - R4 are 100 ohm resistors

DB-25 Connector

2

18

3

11

8

5

15

 

 

 

Содержание 3U

Страница 1: ...Yampp 3U Reference Manual Written by Eric Guérard Version 1 11 ...

Страница 2: ... 3310 GRAPHIC LCD INSTALLATION 9 4 3 COLOR GRAPHIC LCD INSTALLATION 10 4 3 1 WHAT YOU NEED 10 4 3 2 DISPLAY CONNECTIONS 10 4 3 3 FIRMWARE 11 4 3 4 GRAPHICS SKIN UPLOAD 12 5 POWER UP THE PLAYER 13 6 PROGRAM THE BOOT LOADER 13 7 USB DRIVERS INSTALLATION 15 8 PROGRAM TEST FIRMWARE 16 8 1 PROGRAMMING 16 8 2 HARDWARE TESTING 16 9 PROGRAM PLAYER FIRMWARE 17 10 GENERAL CHARACTERISTICS 17 ...

Страница 3: ...per Hansen Keyboard layout fix This document will guide you step by step to the building process of the yampp 3U Rev D MP3 player It is very important to follow each step For further information go to the Yampp website http www yampp com 2 PCB Assembly Here are the step by step instructions for the building process of the Yampp3U Step 1 Install the processor ATMEGA162 Carefully verify the orientat...

Страница 4: ...Page 4 of 13 Step 2 Install the USB chip FT245BM and some surface mount IC IC12 is optional Mount either IC4 or IC12 but not both together Once again don t forget to verify the parts orientations Step 3 Install the MP3 Decoder VS1001K and some surface mount IC ...

Страница 5: ...Yampp 3U Reference Manual Contents Version 1 10 11 10 2005 Page 5 of 13 Step 4 Install the buffer IC 74LVC245 Step 5 Install all the small surface mount parts such as resistors and capacitors ...

Страница 6: ...Yampp 3U Reference Manual Contents Version 1 10 11 10 2005 Page 6 of 13 Step 6 Install the larger surface mount parts Step 7 Install the entire thru hole components ...

Страница 7: ...ure of updating the firmware is explained in section 8 1 Note It s not possible to press 2 buttons at the same time This will cause a bus conflict KEYS AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 Keyboard Display J2 8 6 4 2 7 5 3 1 AD2 AD3 AD4 AD6 KEYS AD5 AD7 TX_EN 9 11 13 15 16 14 12 10 GND V0 VEE A1 R W AD0 AD1 LCD_E E A0 RS VCC Here is an alternative to correct the bus conflict problem You simply have to ...

Страница 8: ...0 4x16 and 4x20 characters displays You must edit the constant h in the firmware package to define the display that will be use and you must rebuild and update the firmware The procedure of updating the firmware is explained in section 8 1 The next table shows you how to connect the character LCD module The pinout of the LCD module can be different from a model to another one So it is very importa...

Страница 9: ...p3U board Be very careful when soldering on the LCD You must edit the constant h in the firmware package to define the display that will be use and you must rebuild and update the firmware The procedure of updating the firmware is explained in section 8 1 Tips I suggest you to apply 2 little drops of epoxy glue on each side of the connector See the red arrows NOKIA DISPLAY J9 8 6 4 2 7 5 3 1 VDD S...

Страница 10: ...after removing the sticker on the backside of the display You can solder wires directly on these gold pads Solder carefully without using too much heat Pin 9 and pin 10 from LCD are used for backlight connections If you have the Epson based controller you will not find the gold pads You must use a connector or you can solder the wires directly on it Additionally you must insert a 1N4148 diode in s...

Страница 11: ... This option provides two ways for storing the characters table in the player The characters table can be stored in Flash memory of the microcontroller or in the hard disk If this definition is uncommented the characters table will be located in the flash memory of the microcontroller Unfortunately this option will consume about 1720 bytes of code space memory For code space problem you can disabl...

Страница 12: ...er use COM5 or edit the download bat file to setup the COM number and the YLINK path then run the batch file 4 3 4 Graphics Skin Upload The display is connected and the new firmware is burned into the chip Now it s time to upload the graphic layout into the Hard disk You can find the default graphic files Skins inside the SKINS folder If you don t upload any graphics you will only see a black scre...

Страница 13: ...loader Before you can download the firmware via USB you need to program the player with the boot loader code This has to be done using the in circuit programming interface which you can get access with the programming connector J1 To program the bootloader you will need a piece of Windows software called YAAP a parallel port driver software and a programming adapter You can download the applicatio...

Страница 14: ... sure everything is blank Select the Program Blank Check menu and follow the directions Step 9 Program the Boot loader Click anywhere in the Flash window then select the File Load menu Choose the y3_boot_M161C_mode hex File The Boot loader should be in the computer memory Step 10 Now it s time to transfer the Boot loader into the ATMega162 Select Program Write Flash menu and follow the directions ...

Страница 15: ...npack the drivers on a directory on your PC Plug in the yampp 3U player and you should be prompted for the location of the drivers You must power up the player before connecting the USB cable Browse to the drivers and follow the installation instructions You should see the USB device in the USB Controller section as USB High Speed Serial Controller and you should have a new comport too You need to...

Страница 16: ...nking This will indicate that the player is ready to receive the new firmware Step 4 Reconnect the USB cable Step 5 Start the yamppLink application and select Update Firmware on the Actions menu You will be prompted for a BIN file to download Browse to the file you want and press Ok The file will be downloaded and the download progress shown in the progress bar at the lower right of the window 8 2...

Страница 17: ... on the screen Step 4 Do the entire hardware test 9 Program Player Firmware To program the latest firmware you simply have to do the procedure explained in section 8 1 Once the firmware is up and running you are ready to transfer songs with the help of Yampplink software 10 General Characteristics Min Typ Max Units USB Transfer Speed TBD 230 KB s Power consumption playing TBD 250 TBD mA Power cons...

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