1. Add the missing file, "mma7455l.h"
2. Modify Ethernet DEMO according to the changes of lwIP API in reversion 1668 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1680 bbd45198-f89e-11dd-88c7-29a3b14d5316

1. Add interrupt context check function (context_gcc.S)
2. Add lock (semaphore) for IIC, USART and Ethernet drivers to prevent simultaneously access
3. Add multiple channels support for scan mode of ADC driver
4. Modify miscellaneous drivers according to ADC driver changes
5. Add SWO output enable function (board.c)
6. Disable all interrupts in GPIO interrupt handler (hdl_interrupt.c)
7. Add two Ethernet utility functions (drv_ethernet.c)
8. Add accelerometer driver (analog output)
9. Add accelerometer demo (draft, application.c)

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1654 bbd45198-f89e-11dd-88c7-29a3b14d5316

1. Solve the problem mentioned in revision 1623 (runtime error) 
   - Cause: In the EFM32 demo application, some TCP/IP functions are called in non-task context (e.g. "tcp_new()"). And after revision 1621, those functions will trigger the scheduler ("rt_schedule()") which seems to be triggered only in task context. 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1624 bbd45198-f89e-11dd-88c7-29a3b14d5316

1. Add ENC28J60 Ethernet controller driver 
2. Add lwIP support (Please read "Readme.txt")
3. Add simple Http server demo application
4. Modify USART device write function to avoid sleep in ISR
5. Fix a bug in USART driver when using compiler optimization
6. Modify to make use the start-up code in libraries
7. Change the default build option for squeezing the executable file size
8. Modify source code alignment

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1622 bbd45198-f89e-11dd-88c7-29a3b14d5316

1. Add SD card driver (SPI mode)
2. Add ELM ChaN FatFs support (Please read "Readme.txt")
   - Warning: FatFs is really FAT! (35KB)
3. Upgrade EFM32 libraries (CMSIS and efm32lib) to version 2.0.0
4. Merge all of the C source code in "libcpu\arm\cortex-m3\" into "cpuport.c"
5. Merge all of the assembly source code in "libcpu\arm\cortex-m3\" into "context_gcc.S" (except "start_gcc.S")

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1525 bbd45198-f89e-11dd-88c7-29a3b14d5316

1. Add EFM32 development kit support
2. Add USART sync mode (SPI) support
3. Add SPI Flash device (ST M25PX16) driver and demo application

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1401 bbd45198-f89e-11dd-88c7-29a3b14d5316

1. Update the copyright information
 - 2009 => 2011
2. Add external oscillator configuration routine in "rt_hw_board_init()"
 - Before, it is set by default frequency, 32MHz
 - Now it can be set by user specified frequency
3. Add ADC and ACMP (analog comparator) drivers
4. Clarify the MCU and target board define in "rtconfig.py"

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1296 bbd45198-f89e-11dd-88c7-29a3b14d5316

 - New branch for Energy Micro's MCUs (http://energymicro.com/).
 - Target board: FM32 Gecko Starter Kit (http://www.energymicro.com/tools)

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1274 bbd45198-f89e-11dd-88c7-29a3b14d5316