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extern rt_uint8_t rt_current_priority;

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in fm3_uart.c Line 599
case label value exceeds maximum value for type

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2152 bbd45198-f89e-11dd-88c7-29a3b14d5316

and unify the coding style in memheap.c

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2151 bbd45198-f89e-11dd-88c7-29a3b14d5316

using rt_bool_t instead of rt_err_t

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ex. if RT_USING_MEMHEAP isn't defined, then memheap.c won't be included

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and implement examples in MB9BF506R and LPC176x branches
define RT_USING_BSP_CMSIS in rtconfig.h will use CMSIS in bsp
define RT_USING_RTT_CMSIS in rtconfig.h will use CMSIS in components 

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and implement the example in MB9BF506R branch

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fixed the mismatch of device definitions in rtdef.h and finsh shell; add line comment in finsh shell. 

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According to the Atmel official recommended, use GPIO instead of TWI for I2C communication

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Add the missing file, "*.a"

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1. Upgrade Cortex driver library (CMSIS -> CMSIS & Device): version 2.3.2 -> 3.0.1 & 3.0.0
 - Remove "bsp/efm32/Libraries/CMSIS/Lib/ARM", "bsp/efm32/Libraries/CMSIS/Lib/G++" and "bsp/efm32/Libraries/CMSIS/SVD" to save space
2. Upgrade EFM32 driver libraries (efm32lib -> emlib): version 2.3.2 -> 3.0.0
 - Remove "bsp/efm32/Libraries/Device/EnergyMicro/EFM32LG" and "bsp/efm32/Libraries/Device/EnergyMicro/EFM32TG" to save space
3. Upgrade EFM32GG_DK3750 development kit driver library: version 1.2.2 -> 2.0.1
4. Upgrade EFM32_Gxxx_DK development kit driver library: version 1.7.3 -> 2.0.1
5. Add energy management unit driver and test code
6. Modify linker script and related code to compatible with new version of libraries
7. Change EFM32 branch version number to 1.0
8. Add photo frame demo application

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