The three-axis accelerometer is the MMA7260QR2 device from Freescale Semiconductor.It can detect the free fall。

My Solution
...........\fallsensor
...........\..........\Application
...........\..........\...........\Configure
...........\..........\...........\.........\app_config.h
...........\..........\...........\Otap
...........\..........\...........\....\Otap.c
...........\..........\...........\....\Otap.h
...........\..........\...........\Source
...........\..........\...........\......\accelerometer.c
...........\..........\...........\......\accelerometer.h
...........\..........\...........\......\Common_Defs.h
...........\..........\...........\......\PC_Radio.c
...........\..........\...........\......\PC_Radio.h
...........\..........\...........\Utilities
...........\..........\...........\.........\Display.c
...........\..........\...........\.........\Display.h
...........\..........\...........\.........\Keyboard.c
...........\..........\...........\.........\Keyboard.h
...........\..........\...........\.........\LCD_Font.h
...........\..........\...........\.........\Leds.c
...........\..........\...........\.........\Leds.h
...........\..........\...........\.........\Sound.c
...........\..........\...........\.........\Sound.h
...........\..........\...........\.........\UartUtil.c
...........\..........\...........\.........\UartUtil.h
...........\..........\fallsensor.ewd
...........\..........\fallsensor.xml
...........\..........\PLM
...........\..........\...\FlashLoader
...........\..........\...\...........\FlashMC1322x.mac
...........\..........\...\...........\FlashMC1322x.out
...........\..........\...\Icf
...........\..........\...\...\MC1322x-RAM-ROM.icf
...........\..........\...\...\MC1322x.ddf
...........\..........\...\Interface
...........\..........\...\.........\EmbeddedTypes.h
...........\..........\...\.........\PlatformInit.h
...........\..........\...\.........\PortConfig.h
...........\..........\...\.........\PWR_Config.h
...........\..........\...\.........\RF_Config.h
...........\..........\...\.........\UART_Interface.h
...........\..........\...\Lib
...........\..........\...\...\LLC.a
...........\..........\...\LibInterface
...........\..........\...\............\ADC_Interface.h
...........\..........\...\............\ASM_Interface.h
...........\..........\...\............\Crm.h
...........\..........\...\............\CRM_Regs.h
...........\..........\...\............\GPIO_Interface.h
...........\..........\...\............\I2C_Interface.h
...........\..........\...\............\Init_Interface.h
...........\..........\...\............\Interrupt.h
...........\..........\...\............\ITC_Interface.h
...........\..........\...\............\NVM.h
...........\..........\...\............\Platform.h
...........\..........\...\............\Platform_Private.h
...........\..........\...\............\SPI_Interface.h
...........\..........\...\............\Ssi_Interface.h
...........\..........\...\............\Ssi_Regs.h
...........\..........\...\............\Timer.h
...........\..........\...\............\UartLowLevel.h
...........\..........\...\Source
...........\..........\...\......\Common
...........\..........\...\......\......\Sys
...........\..........\...\......\......\...\Init-IAR.S
...........\..........\...\......\......\...\PlatformInit.c
...........\..........\PostBuildConvertion.bat
...........\..........\SMAC
...........\..........\....\Configure
...........\..........\....\.........\options_config.h
...........\..........\....\.........\security_config.h
...........\..........\....\Drivers
...........\..........\....\.......\Configure
...........\..........\....\.......\.........\board_config.h
...........\..........\....\.......\Interface
...........\..........\....\.......\.........\Delay.h
...........\..........\....\.......\.........\FreqDepSettings.h
...........\..........\....\.......\.........\ghdr
...........\..........\....\.......\.........\....\asm.h
...........\..........\....\.......\.........\....\maca.h
...........\..........\....\.......\.........\....\rcv_spi_regs.h
...........\..........\....\.......\.........\MacaInterrupt.h
...........\..........

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