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    Product Updates
          Products >  Development Boards >  MYD-AM335X TI Series > MYD-AM335X Development Board
 
MYD-AM335X Development Board

MYD-AM335X Development Board

- MYC-AM335X CPU Module as Controller Board
- Up to 1GHz TI AM335X Series ARM Cortex-A8 Processors
- 512MB DDR3 SDRAM (256MB compatible)
- 512MB Nand Flash (256MB compatible)
- Serial ports, 4 x USB Host, OTG, 2 x Gigabit Ethernet, CAN, RS485, TF, Audio
- Supports HDMI and LCD Display
- Optional 4.3- or 7- inch LCD, WiFi, Camera, 3G and GPS Modules
- Supports for Linux 3.2.0, Android 4.2.2 and Windows Embedded Compact 7
 

Description

The MYD-AM335X Development Board designed by MYIR is a high-performance ARM Evaluation Module (EVM) using the MYC-AM335X CPU module as the core controller board. It is based on 800MHz Texas Instruments (TI) Sitara AM335x family of ARM Cortex-A8 Microprocessors (MPUs) that deliver high DMIPs at a low cost while also delivering optional 3D graphics acceleration and key peripherals. These TI Cortex-A8 MPUs include industrial interface options, such as EtherCAT and PROFIBUS, and can support the Linux, Android and Windows CE high-level operating systems. The combination of graphics and connectivity support makes TI AM335x MPUs ideal for home automation, industrial automation, enterprise/educational tablets, portable navigation devices and networking. The board can work in harsh environment supporting -40 to +85 Celsius extended temperature operation for industrial embedded applications.


MYD-AM335X Development Board


The TI AM335x consists of 6 pin-pin compatible devices (AM3352, AM3354, AM3356, AM3357, AM3358 and AM3359) with various options including speed grades, packages, graphics and peripherals. MYIR is using the 15x15 mm, 0.8-mm ball pitch, ZCZ package AM335x ARM CPU on the MYC-AM335X CPU Module which is an SOM (System on Module) and has the core components AM335x processor (800MHz by default), 512MB DDR3 SDRAM, 512MB Nand Flash and Gigabit Ethernet PHY chip on board and can be served as the core of your embedded system. It has two 2.0mm pitch 60-pin male expansion connectors, one 2.0mm pitch 26-pin interface and one 2.0mm pitch 10-pin interface to allow extension of all the controller signals and ports to the base board through headers and connectors, thus exposing more features of the AM335x Cortex-A8 Processors.


MYC-AM335X CPU Module


The MYD-AM335X base board has extended many features and peripherals with the support of the MYC-AM335X SOM and some extended controller chips including two serial ports, four USB Host ports, one USB OTG port, dual Gigabit Ethernet ports, one CAN, one RS485, one Micro SD, HDMI, LCD, Touch screen and more others.


User can integrate a different MYC-AM335X SOM on the same base board, thus making six variants of AM335x evaluation boards.

MYD-AM3359 Development Board – with MYC-AM3359 CPU Module for TI AM3359

MYD-AM3358 Development Board – with MYC-AM3358 CPU Module for TI AM3358

MYD-AM3357 Development Board – with MYC-AM3357 CPU Module for TI AM3357

MYD-AM3356 Development Board – with MYC-AM3356 CPU Module for TI AM3356

MYD-AM3354 Development Board – with MYC-AM3354 CPU Module for TI AM3354

MYD-AM3352 Development Board – with MYC-AM3352 CPU Module for TI AM3352



The MYD-AM335X series ARM Cortex-A8 boards have many features in common only with some differences depending on the AM335x Cortex-A8 CPU features. You can get to know the differences from above image.


The MYD-AM335X board comes with Linux 3.2.0, Android 4.2.2 and Windows CE7 software packages, detailed documents, necessary cable accessories as well as optional 4.3- and 7-inch LCD (with touch screen), WiFi, Camera, 3G and GPS extension modules to provide an AM335x starter kit and enable a quickly start of evaluation of AM335x Cortex-A8 MPUs.


Features

Mechanical Parameters

  • Dimensions: 130mm x 100mm (base board), 70mm x 50mm (CPU Module)
  • PCB Layers: 4-layer design (base board), 6-layer design (CPU Module)
  • Power supply: +5V/2A (base board), +3.3V/0.8A (CPU Module)
  • Working temperature: 0~70 Celsius (commercial grade) or -40~85 Celsius (industrial grade)

OS Support

  • Linux 3.2.0
  • Android 4.2.2
  • Windows CE7

The MYD-AM335X Controller Board (MYC-AM335X CPU Module)

Processor

  • TI AM3352, AM3354, AM3356, AM3357, AM3358, AM3359 (15x15 mm, 0.8-mm ball pitch, ZCZ package)
    - 800MHz ARM Cortex-A8 32-bit RISC MPU (Up to 1GHz)
    - NEON™ SIMD Coprocessor
    - 32KB/32KB of L1 Instruction/Data Cache with Single-Error Detection (parity)
    - 256KB of L2 Cache with Error Correcting Code (ECC)
    - SGX530 Graphics Engine
    - Programmable Real-Time Unit Subsystem

Memory

  • 512MB (2*256MB) DDR3 SDRAM (2*128MB compatible)
  • 512MB Nand Flash (256MB compatible)

Peripherals and Signals Routed to Pins

  • On-board Gigabit Ethernet PHY
  • One power indicator (Red LED)
  • One user LED (Green)
  • Two 2.0mm pitch 60-pin expansion connectors can carry out interfaces below
    - 2 x USB2.0 OTG ports
    - 6 x Serial ports
    - 2 x I2C
    - 1 x SPI
    - 7 x ADC
    - 2 x PWM
    - 3 x SDIO
  • One 2.0mm pitch 26-pin expansion connector
  • One 2.0mm pitch 10-pin expansion connector

The MYD-AM335X Base Board

  • Serial ports
    - 1 x 3-wire RS232 Debug serial port (DB9)
    - 1 x 3-wire RS232 serial port (UART1)
    - 1 x RS485 (with isolation)
  • USB
    - 4 x USB2.0 Host ports
    - 1 x USB2.0 OTG ports
  • 2 x 10/100/1000Mbps Ethernet interfaces
  • 1 x CAN interface (with isolation)
  • 1 x TF card slot
  • 1 x HDMI interface
  • 1 x LCD interface (16-bit true color, supports optional 4.3-inch and 7-inch TFT LCD with 4.3-inch resistive or 7-inch resistive or 7-inch capacitive touch screen)
  • 1 x 4-wire resistive touch screen interface
  • 1 x Audio input port (3.5mm jack)
  • 1 x Stereo Audio output port (3.5mm jack)
  • 4 x Buttons (1 x Reset button, 3 x User buttons)
  • 1 x Power indicator (Red LED)
  • 2 x 2.0mm 20-pin expansion connectors
    - 7 x ADC
    - 1 x SPI
    - 2 x I2C
    - 4 x UART


Similar Products

MYD-AM335X-Y Development Board MYD-AM335X-J Development Board






Hardware Specification

The MYD-AM335X series ARM Cortex-A8 boards have many features in common only with some differences depending on the AM335x Cotex-A8 CPU features. You can get to know the differences and more features of the AM335x series processors from below table. MYIR deliveries the MYD-AM3352 and MYD-AM3359 by default according to customer’s specified model. Other four models are only available for mass quantity demand.

The
TI AM335x microprocessors, based on the ARM Cortex-A8, operating at up to 1GHz, are enhanced with image, graphics processing, peripherals and industrial interface options such as EtherCAT and PROFIBUS. The device supports the following high-level operating systems (HLOSs) that are available free of charge from TI:

  • Linux®
  • Android™

The AM335x microprocessor contains these subsystems:

  • Microprocessor unit (MPU) subsystem based on the ARM Cortex-A8 microprocessor.
  • POWERVR SGX™ Graphics Accelerator subsystem for 3D graphics acceleration to support display and gaming effects.
  • The Programmable Real-Time Unit and Industrial Communication Subsystem (PRU-ICSS) is separate from the ARM core, allowing independent operation and clocking for greater efficiency and flexibility.
  • The PRU-ICSS enables additional peripheral interfaces and real-time protocols such as EtherCAT, PROFINET, EtherNet/IP, PROFIBUS, Ethernet Powerlink, Sercos, and others.

AM335x ARM Cortex™-A8 Processors

Core Feature

AM3352

AM3354

AM3356

AM3357

AM3358

AM3359

Package

15x15mm, 0.8mm (ZCZ)

CPU Speed (MHz)

300, 600, 800, 1000

600, 800,1000

300, 600,800

300, 600,800

600, 800,1000

800

Core Internal Memory

64KB SRAM shared w/
Data 32KB Cache, Programmable 32KB Cache

On-chip L2 (KB)

256

External Memory Interface

DDR2/DDR3/DDR3L/mDDR (LPDDR), 2x16-bit, NAND ECC

Graphics

-

3D Graphics

-

3D Graphics

OS Support

Linux, Android, RTOS, Windows Embedded, no-OS

Other Hardware Acceleration

Crypto Accelerator

Crypto
Accelerator

2 PRU-ICSS
Crypto Accelerator

2 PRU-ICSS
Crypto Accelerator   + EtherCAT slave support

2 PRU-ICSS
Crypto Accelerator

2 PRU-ICSS
Crypto Accelerator
+ EtherCAT slave support

10/100/1000 EMAC

2 port switch

USB 2.0 OTG + PHY

2

Serial Ports

6 UART, 2 SPI, 3 I2C, 2 McASP, 2 CAN, 8 Timers

System

EDMA, WDT, RTC, 3 eQEP, 3 eCAP, JTAG, ADC (8ch)

Parallel

3 MMC/SD/SDIO, GPIO


Function Block Diagram of MYD-AM335X



Dimension Chart of MYD-AM335X


Software Features

MYIR’s AM335x Starter Kit MYD-AM335X supports for Linux, Android and WinCE and is provided with software packages. Many peripheral drivers are in source code to help accelerate customers’ designs with a stable and reliable hardware and software platform. The software features are summarized as below:


OS

Item

Features

Description

Linux

Bootstrap program

SPI

The primary bootstrap

u-boot

The secondary bootstrap

Kernel

Version

Linux 3.2.0

Drivers

USB OTG, USB WiFi, Gigabit Ethernet, MMC/SD/TF, NandFlash, CAN, RS485, Audio, LCD Controller (supports 4.3- and 7-inch LCD), RTC, HDMI, Touch driver, Button, UART, LED

File system

UBIFS

Provide image file

Android

Bootstrap program

Bootstrap

Used for u-boot

u-boot

The secondary bootstrap

Kernel

Version

Linux 3.2.0

Drivers

USB OTG, Ethernet, SD, Audio, LCD Controller (supports 4.3- and 7-inch LCD), RTC, HDMI, Touch driver, Button

File system

Android 4.2.2 file system

Provide binary image file

WinCE

Bootstrap program
X-loader
The primary bootstrap
e-boot
The secondary bootstrap
Kernel Version Windows Embedded Compact 7
Drivers USB OTG, Gigabit Ethernet, GPIO, MMC/SD/TF, NandFlash, I2C, MCASP, Audio, LCD Controller (supports 4.3- and 7-inch LCD), Touch driver, Backlight, Battery, RPU, UART, GPIO Keyboard, DMA, LED
File system BINFS Provide binary image file


Relative Download and Links

You can download relative chip datasheet, products datasheet, user manual, software package from below. Any inquiry, please contact MYIR.


1 TI AM335x Datasheet 2.80 MB
2 TI AM335x Technical Reference Manual 19.7 MB
3 MYD-AM335X Development Board Overview 1.12 MB
4 MYC-AM335X CPU Module Overview 1.03 MB
5 MYC-AM335X CPU Module Dimensions 844 KB
6 MYD-AM335X Development Board Dimensions 138 KB



MYD-AM335X Development Board



MYC-AM335X CPU Module Top-view



MYC-AM335X CPU Module Bottom-view



MYD-AM335X Development Board Base Board


Price and Ordering


Item

Part No.

Unit Price

Ordering

MYD-AM335X Development Board (commercial, 512MB DDR3, 512MB Flash)

MYD-AM335X

USD139

MYD-AM335X Development Board (industrial, 512MB DDR3, 512MB Flash)
MYD-AM335X-I
USD159

MYD-AM335X Development Board (industrial, 256MB DDR3, 256MB Flash)
MYD-AM335X-I-256
USD139

MYC-AM335X CPU Module (optional, commercial, 512MB DDR3, 512MB Flash)
MYC-AM335X
USD68
MYC-AM335X CPU Module (optional, industrial, 512MB DDR3, 512MB Flash)
MYC-AM335X-I
USD88
MYC-AM335X CPU Module (optional, industrial, 256MB DDR3, 256MB Flash)
MYC-AM335X-I-256
USD68

4.3 inch LCD Module with resistive touch screen (optional)

MY-LCD43TP

USD60

7 inch LCD Module with resistive touch screen (optional)

MY-LCD70TP

USD99

7 inch LCD Module with capacitive touch screen (optional)
MY-LCD70TP-C
USD99

MY-WF003U USB WiFi Module (optional) MY-WF003U USD25
MY-CAM001U USB Camera Module (optional) MY-CAM001U USD29
MY-CU005U USB 3G Module (optional) MY-CU005U USD69
MY-GPS008C GPS Module (optional) MY-GPS008C USD49

Note:

1. One MYD-AM335X Development Board includes one CPU module MYC-AM335X mounted on the base board by default. If you need more CPU module, you can order extra ones.

2 . Please contact MYIR to specify which CPU (TI AM3352/AM3354/AM3356/AM3357/AM3358/AM3359) you need after ordering.

3. Discount is available for mass orders. Please contact MYIR for inquiries.

4. The boards of commercial grade  can work in temperature ranging from 0~70 Celsius. The boards of industrial grade can work in temperature ranging from -40~85 Celsius. The HDMI chip on board can only work in temperature ranging from -20~70 Celsius.

5. We accept custom design based on the MYD-AM335X, whether reducing, adding or modifying the existing hardware according to customer’s requirement.




Packing List


NO. Item Qty Description
1 MYD-AM335X board 1pc MYD-AM3352/MYD-AM3354/MYD-AM3356/MYD-AM3357/MYD-AM3358/MYD-AM3359
2 Power adapter 1pc 5V/2A Power adapter
3 Ethernet cable 1pc
4 USB Cable 1pc
5 MY-LCD43TP (optional) 1pc 4.3 inch LCD with resistive touch screen
6 MY-LCD70TP (optional) 1pc 7 inch LCD with resistive touch screen
7 MY-LCD70TP-C (optional) 1pc 7 inch LCD with capacitive touch screen
8 MY-WF003U (optional) 1pc USB WiFi module
9 DVD 1pc user manual, base board schematic in PDF format, datasheet, software package


More FAQ >>


1. Does the MYD-AM335X have OpenGL ES2.0 implemented into the Windows CE7 kernel?

Question:
Does the MYD-AM335X have OpenGL ES2.0 implemented into the Windows CE7 kernel?

Answer:
Yes, we have implemented OpenGL ES2.0 into the Windows CE7 kernel for the MYD-AM335X development board.

2. What are the differences for the AM3352, 3354, 3356, 3357, 3358 and 3359 boards?

Question:
What are the differences for the AM3352, 3354, 3356, 3357, 3358 and 3359 boards?

Answer:

MYIR is using the 15x15 mm, 0.8-mm ball pitch, ZCZ package AM335x ARM CPU on the MYC-AM335X CPU Module and the main differences of the MYD-AM335X boards are from the CPU (AM3352, AM3354, AM3356, AM3357, AM3358 and AM3359) features including speed grades, packages, graphics and peripherals. Please refer to the file below:

 AM335x_Devices 


3. How to use extended UART on the MYD-AM335X board?

Question:
Hello, I want to know how to use the extended UART on the MYD-AM335X board and how do you define the UART numbers as for tty0~63, ttyO1~5 and ttyS0~5?

Answer:

Please refer to the MYD-AM335X user manual Figure 2-11 and Figure 2-12 as captured below:


Figure 2-11


Figure 2-12

Combine the MYC-AM335X user manual about the pin allocations, you will know how to use the extended UART.


About the UART numbers, please refer to below:

 ttyO1 --- UART1 
 ttyO2 --- UART2 
 ...... 
 ttyO5 --- UART5







4. How to use six serial ports of the MYD-AM335X board?

Question:
The MYD-AM335X board has six serial ports. How can I use all the serial ports?

Answer:

The MYD-AM335X board has six serial ports. But UART4 and UART5 have been reused with other functions. If sometimes you need to use all the six serial ports, we can modify the kernel.


  • The UART4 is reused with CAN, we use CAN by default


  • The UART5 is reused with K2/K3 button, we use K2/K3 button by default.

Note: So if you want to use UART4 and UART5, you can not use the CAN and K2/K3 button then.


Please make modifications about kernel as below:

1. Open the kernel file

$vi arch/arm/mach-omap2/board-am335xevm.c


2. Add UART4 and UART5 function definition codes if not exist.

/* Module pin mux for uart3 */
static struct pinmux_config uart3_pin_mux[] = {
        {"spi0_cs1.uart3_rxd", OMAP_MUX_MODE1 | AM33XX_PIN_INPUT_PULLUP},
        {"ecap0_in_pwm0_out.uart3_txd", OMAP_MUX_MODE1 | AM33XX_PULL_ENBL},
        {NULL, 0},
};

/* Module pin mux for uart4 */
static struct pinmux_config uart4_pin_mux[] = {
        {"uart0_ctsn.uart4_rxd", OMAP_MUX_MODE1 | AM33XX_PIN_INPUT_PULLUP},
        {"uart0_rtsn.uart4_txd", OMAP_MUX_MODE1 | AM33XX_PULL_ENBL},
        {NULL, 0},
};

/* Module pin mux for uart5 */
static struct pinmux_config uart5_pin_mux[] = {
        {"mii1_col.uart5_rxd", OMAP_MUX_MODE3 | AM33XX_PIN_INPUT_PULLUP},
        {"rmii1_refclk.uart5_txd", OMAP_MUX_MODE3 | AM33XX_PULL_ENBL},
        {NULL, 0},


3. Add UART initialization code if not exist, as below in blue words.

static void uart3_init(int evm_id, int profile)
{
        printk("--------uart3_init\n");

        /* Configure Uart3*/
        setup_pin_mux(uart3_pin_mux);
        return;
}

static void uart4_init(int evm_id, int profile)
{
        printk("--------uart4_init\n");

        /* Configure Uart4*/
        setup_pin_mux(uart4_pin_mux);
        return;
}

static void uart5_init(int evm_id, int profile)
{
        printk("--------uart5_init\n");

        /* Configure Uart4*/
        setup_pin_mux(uart5_pin_mux);
        return;
}

4. Add registration for the UART4 and UART5 and comment out the CAN and keys functions as in below red codes.

 {uart1_init,    DEV_ON_BASEBOARD, PROFILE_ALL},
        {uart2_init,    DEV_ON_BASEBOARD, PROFILE_ALL},
        {uart3_init,    DEV_ON_BASEBOARD, PROFILE_ALL},
        {uart4_init,    DEV_ON_BASEBOARD, PROFILE_ALL},
        {uart5_init,    DEV_ON_BASEBOARD, PROFILE_ALL},
//      {d_can_init,    DEV_ON_BASEBOARD, PROFILE_ALL},
//      {gpio_keys_init,  DEV_ON_BASEBOARD, PROFILE_ALL},
        {gpio_led_init,  DEV_ON_BASEBOARD, PROFILE_ALL},
        {NULL, 0, 0},


5. Re-compile the kernel and update the system.


5. How to download kernel and file system through tftp in u-boot?

Question:
How to download kernel and file system through tftp in u-boot?

Answer:

1. Install TFTP on Ubuntu. 

2. Please copy the kernel and file system to tftp directory under Ubuntu system, for example, copy uImage and ubi.img to the /tftpboot directory under Ubuntu system. 

3. 1) Press “Enter” to get into u-boot command mode when the board start countdown; 

2) Configure u-boot environment; 

1 set ipaddr 192.168.1.250 

2 set ethaddr 88:33:14:f6:c0:d4 

3 set serverip 192.168.1.220 

4 saveenv 

5 reset 

The above commands are used for setting IP address of the board, MAC address of the Ethernet, IP address of the Ubuntu Host server, saving variables and restart. Then use ping command to ensure the board pings through with the Host. 

1 ping 192.168.1.220 

2 Auto negotitation failed 

3 link up on port 0, speed 100, full duplex 

4 Using cpsw device 

5 host 192.168.1.220 is alive 


For above, if prompts “host xxx is alive”, it means the board has pinged through with the Host successfully. If failed, it will prompts as below: 

1 MYD_AM335X# ping 192.168.1.220 

2 Auto negotitation failed 

3 Auto negotitation failed 

4 Using cpsw device 

5 ping failed; host 192.168.1.220 is not alive


3) Acquire Address Assignment Use printenv to check u-boot environment variables 

1 printenv 

There will be some output as below: 

"updatesys=nand erase.chip;mmc rescan; fatload mmc 0 82000000 MLO;nandecc hw 2;nand write.i 82000000 0 ${filesize}; fatload mmc 0 82000000 u-boot.img;nandecc hw 2;nand write.i 82000000 80000 ${filesize}; fatload mmc 0 82000000 uImage;nandecc hw 2;nand write.i 82000000 280000 ${filesize}; fatload mmc 0 82000000 ubi.img;nandecc sw;nand write.i 82000000 780000 ${filesize};led flash all"


all The purple part indicates programming MLO; the red part indicates programming u-boot; the green part indicates programming uImage; the blue part indicates programming filesystem, the nandecc hw 2 and the nandecc sw need ECC hardware checking and software checking. 


The address assignment is as below: 

First boot address: 0x0 

RAM memory address: 0x82000000 

u-boot address: 0x80000 

kernel address: 0x280000 ubi.img 

filesystem address: 0x780000 


4) Download kernel Download kernel from PC to the board RAM 0x82000000, the length will be reminded after succeed such as Bytes transferred = 3605768 (370508 hex) 

1 2 tftp 0x82000000 uImage nandecc hw 

2 #AM335X kernel needs ecc checking or it will have error: ECC: uncorrectable. 


If executing above command, it displays “#”, it means transmitting file; if prompts “TTT…”, it means transmitting overtime, you may need to check if the board has pinged through Host successfully. Erase the content of 0x370508 byte from 0x280000 address: 

1 nand erase 0x280000 0x370508 


Write the content of RAM 0x82000000 to Flash address 0x280000, length is 0x3605768: 

1 nand write.i 0x82000000 0x280000 0x370508 


 For above 

  • nand write.jffs2 program JFFS2 file system, jump over the bad block 
  • nand write.i equal to nand write.jffs2 
  • nand write.yaffs program yaffs2 file system, need page aligned 
Download file sytem 


Download file system from PC to the board RAM 0x82000000, the length will be prompted after downloading successfully, using hexadecimal, command is as below: 

1 tftp 0x82000000 ubi.img 

2 nandecc sw        #AM335X kernel needs ecc software checking 


Note: due to the large size of filesystem, please do not interrupt during the filesystem transmitting to avoid failure. 


Erase the content of 0x3da000 byte from 0x780000 

1 nand erase 0x780000 0x3da0000 


Write the content of RAM 0x82000000 to the FLASH 0x780000 with length 0x3da0000: 

1 nand write.i 0x82000000 0x780000 0x3da0000


6. map_hwmod: wd_timer2: __wait_target_disable failed

Question:
When using the watchdog on MYD-AM335X board, there will appear below error information: map_hwmod: wd_timer2: __wait_target_disable failed It doesn't affect the using of watchdog, but it will appear always, how to remove this information?

Answer:

We can remove this information through modifying linux-3.2/arch/arm/mach-omap2/omap_hwmod.c

--- linux/arch/arm/mach-omap2/omap_hwmod.c.orig    2012-06-12 16:13:11.166367276 +0200
+++ linux/arch/arm/mach-omap2/omap_hwmod.c    2012-06-12 16:15:56.319482962 +0200
@@ -781,6 +781,8 @@
                          oh->prcm.omap4.clkctrl_offs);
 }
  
+#define WD_FILTER    "wd_timer2"
+
 /**
  * _omap4_disable_module - enable CLKCTRL modulemode on OMAP4
  * @oh: struct omap_hwmod *
@@ -807,10 +809,10 @@
             oh->prcm.omap4.clkctrl_offs);
  
     v = _omap4_wait_target_disable(oh);
-    if (v)
-        pr_warn("omap_hwmod: %s: _wait_target_disable failed\n",
-                oh->name);
-
+    if (v) {
+        if (strcmp(oh->name, WD_FILTER))
+            pr_warn("omap_hwmod: %s: _wait_target_disable failed\n", oh->name);
+    }
     return 0;
 }




7. How many USB can be used on the MYD-AM335X board?

Question:
How many USB can be used on the MYD-AM335X board?

Answer:

The AM335x CPU has two USB signals: USB0 and USB1. MYIR's MYD-AM335X development board has total 5 USB port including the 1 USB OTG port. We have used USB Hub chip USB2514 on our board to extend USB1 to 4 channels. The USB OTG is connected to the USB0 signal. So there are total 5 USB can be used on the MYD-AM335x board.


You may don't need so 4 USB Host, you can tailor to your requirement. For example, if you only need to use one USB Host, you need only connect USB to USB1_DM and USB1_DP, plus the USB1_DRVVBUS driver that's OK. The USB1_ID is connected to GND. 


AM335x has two USB signals



AM335x USB pin list



MYD-AM335X USB OTG


MYD-AM335X USB Host



MYD-AM335X USB Host driver circuit



8. How to tailor to MYD-AM335X kernel?

Question:
How to tailor to MYD-AM335X kernel?

Answer:

LCD and USB parts, remove or comment out below code:

source code path: arch/arm/mach-omap2/board-am335xevm.c



I2C part, remove or comment out below code:

source code path: arch/arm/mach-omap2/board-am335xevm.c 


Audio part: remove or comment out below codes in kernel source code

source code path: arch/arm/mach-omap2/devices.c


HDMI and touch screen driver

remove or comment out below codes in file system:

script files: /etc/init.d/rc file or /etc/init.d/rcS file


9. How to load LCD and HDMI driver location in Linux?

Question:
How to load LCD and HDMI driver location in Linux?

Answer:

V6 or before V6 edition of the product disk file system: /etc/init.d/rc file

Or V7 and after that edition of the product disk file system: /etc/init.d/rcS file 





10. Troubleshooting TF card

Question:
When I switch the jumper to run the board from the TF card, the board only outputs " CCCCC" to the terminal screen. What's the problem?

Answer:
There are two reasons to cause the problem:
1. You have not used the HP USB Disk Storage Format Tool 2.0.6.EXE” tool to format the TF card, please use the tool we provided in the product disk under 03-Tools folder;
2. If the TF card has a special write lockout function and was written protected.

More FAQ >>


 

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