Emcraft Systems
2.
Develop STM32F4 SOM Rev 2A.
ID
: RT 88247.
3.
Port U-boot and Linux to STM32F4 SOM Rev 2A.
ID
: RT 90499.
3.3. Known Problems & Limitations
This section lists known problems and limitations of this release:
1.
CONFIG
_
KERNEL
_
IN
_
ENVM
requires disabling
CONFIG
_
ARM
_
UNWIND
and
CONFIG
_
EARLY
_
PRINTK
.
ID
: RT 74683.
Workaround
: When enabling
CONFIG
_
KERNEL
_
IN
_
ENVM
in the kernel, disable
CONFIG
_
ARM
_
UNWIND
and
CONFIG
_
EARLY
_
PRINTK
.
2.
Debugging of multi-threaded applications using GDB is not supported.
ID
: RT 77243.
Workaround
: None. This issue will be resolved in future releases of the product.
3.
Some LCD signals are not available on the SOM interface connectors. Specifically, the
following signals overlap with the SDRAM interface used on the SOM to connect to the
external RAM and are missing on the interface connectors: LCD_B0, LCD_B3, LCD_G0,
and LCD_G1. An implication of this problem is that colors may be slightly distorted on a
connected LCD.
ID:
RT 101381.
Workaround:
None.
4.
JTAG debugging rates are limited to 1 KHz.
ID:
RT 101140.
Workaround:
None.
4. Hardware Setup
This section explains how to set up the Emcraft Systems STM32F4 SOM board in harness
with the Emcraft Systems SOM-BSB-EXT baseboard.
4.1. Hardware Interfaces
The STM32F4 SOM board in harness with the Emcraft Systems SOM-BSB-EXT baseboard
provides the following components and interfaces:
Emcraft Systems STM32F4 SOM Starter Kit Guide
6/12
Release 1.12.0