The use of STM32F207 library functions of the official, the keyboard scan mode detection.

KeyScan_STM32F207
.................\Libraries
.................\.........\CMSIS
.................\.........\.....\CMSIS END USER LICENCE AGREEMENT.pdf
.................\.........\.....\Device
.................\.........\.....\......\ST
.................\.........\.....\......\..\STM32F2xx
.................\.........\.....\......\..\.........\Include
.................\.........\.....\......\..\.........\.......\stm32f2xx.h
.................\.........\.....\......\..\.........\.......\system_stm32f2xx.h
.................\.........\.....\......\..\.........\Release_Notes.html
.................\.........\.....\......\..\.........\Source
.................\.........\.....\......\..\.........\......\Templates
.................\.........\.....\......\..\.........\......\.........\arm
.................\.........\.....\......\..\.........\......\.........\...\startup_stm32f2xx.s
.................\.........\.....\......\..\.........\......\.........\gcc_ride7
.................\.........\.....\......\..\.........\......\.........\.........\startup_stm32f2xx.s
.................\.........\.....\......\..\.........\......\.........\iar
.................\.........\.....\......\..\.........\......\.........\...\startup_stm32f2xx.s
.................\.........\.....\......\..\.........\......\.........\system_stm32f2xx.c
.................\.........\.....\......\..\.........\......\.........\TASKING
.................\.........\.....\......\..\.........\......\.........\.......\cstart_thumb2.asm
.................\.........\.....\......\..\.........\......\.........\TrueSTUDIO
.................\.........\.....\......\..\.........\......\.........\..........\startup_stm32f2xx.s
.................\.........\.....\Documentation
.................\.........\.....\.............\CMSIS-SVD_Schema_1_0.xsd
.................\.........\.....\.............\CMSIS_CM4_SIMD.htm
.................\.........\.....\.............\CMSIS_Core.htm
.................\.........\.....\.............\CMSIS_DebugSupport.htm
.................\.........\.....\.............\CMSIS_History.htm
.................\.........\.....\.............\CMSIS_Logo_Final.jpg
.................\.........\.....\.............\CMSIS_System_View_Description.htm
.................\.........\.....\Include
.................\.........\.....\.......\arm_common_tables.h
.................\.........\.....\.......\arm_math.h
.................\.........\.....\.......\core_cm0.h
.................\.........\.....\.......\core_cm3.h
.................\.........\.....\.......\core_cm4.h
.................\.........\.....\.......\core_cm4_simd.h
.................\.........\.....\.......\core_cmFunc.h
.................\.........\.....\.......\core_cmInstr.h
.................\.........\.....\index.htm
.................\.........\.....\README.txt
.................\.........\STM32F2xx_StdPeriph_Driver
.................\.........\..........................\inc
.................\.........\..........................\...\misc.h
.................\.........\..........................\...\stm32f2xx_adc.h
.................\.........\..........................\...\stm32f2xx_can.h
.................\.........\..........................\...\stm32f2xx_crc.h
.................\.........\..........................\...\stm32f2xx_cryp.h
.................\.........\..........................\...\stm32f2xx_dac.h
.................\.........\..........................\...\stm32f2xx_dbgmcu.h
.................\.........\..........................\...\stm32f2xx_dcmi.h
.................\.........\..........................\...\stm32f2xx_dma.h
.................\.........\..........................\...\stm32f2xx_exti.h
.................\.........\..........................\...\stm32f2xx_flash.h
.................\.........\..........................\...\stm32f2xx_fsmc.h
.................\.........\..........................\...\stm32f2xx_gpio.h
.................\.........\..........................\...\stm32f2xx_hash.h
.................\.........\..........................\...\stm32f2xx_i2c.h
.................\.........\........................

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