Stm32 based keyboard scan matrix, the corresponding key is displayed on the seven-segment LED common cathode

矩阵键盘\CMSIS\core_cm3.c
........\.....\core_cm3.h
........\.....\startup\startup_stm32f10x_hd.s
........\.....\.......\startup_stm32f10x_ld.s
........\.....\.......\startup_stm32f10x_md.s
........\.....\stm32f10x.h
........\.....\system_stm32f10x.c
........\.....\system_stm32f10x.h
........\FWlib\inc\misc.h
........\.....\...\stm32f10x_adc.h
........\.....\...\stm32f10x_bkp.h
........\.....\...\stm32f10x_can.h
........\.....\...\stm32f10x_crc.h
........\.....\...\stm32f10x_dac.h
........\.....\...\stm32f10x_dbgmcu.h
........\.....\...\stm32f10x_dma.h
........\.....\...\stm32f10x_exti.h
........\.....\...\stm32f10x_flash.h
........\.....\...\stm32f10x_fsmc.h
........\.....\...\stm32f10x_gpio.h
........\.....\...\stm32f10x_i2c.h
........\.....\...\stm32f10x_iwdg.h
........\.....\...\stm32f10x_pwr.h
........\.....\...\stm32f10x_rcc.h
........\.....\...\stm32f10x_rtc.h
........\.....\...\stm32f10x_sdio.h
........\.....\...\stm32f10x_spi.h
........\.....\...\stm32f10x_tim.h
........\.....\...\stm32f10x_usart.h
........\.....\...\stm32f10x_wwdg.h
........\.....\src\misc.c
........\.....\...\stm32f10x_adc.c
........\.....\...\stm32f10x_bkp.c
........\.....\...\stm32f10x_can.c
........\.....\...\stm32f10x_crc.c
........\.....\...\stm32f10x_dac.c
........\.....\...\stm32f10x_dbgmcu.c
........\.....\...\stm32f10x_dma.c
........\.....\...\stm32f10x_exti.c
........\.....\...\stm32f10x_flash.c
........\.....\...\stm32f10x_fsmc.c
........\.....\...\stm32f10x_gpio.c
........\.....\...\stm32f10x_i2c.c
........\.....\...\stm32f10x_iwdg.c
........\.....\...\stm32f10x_pwr.c
........\.....\...\stm32f10x_rcc.c
........\.....\...\stm32f10x_rtc.c
........\.....\...\stm32f10x_sdio.c
........\.....\...\stm32f10x_spi.c
........\.....\...\stm32f10x_tim.c
........\.....\...\stm32f10x_usart.c
........\.....\...\stm32f10x_wwdg.c
........\Output\core_cm3.crf
........\......\core_cm3.d
........\......\core_cm3.o
........\......\delay.crf
........\......\delay.d
........\......\delay.o
........\......\exit.crf
........\......\exit.d
........\......\exit.o
........\......\exit.__i
........\......\ExtDll.iex
........\......\exti.crf
........\......\exti.d
........\......\exti.o
........\......\exti.__i
........\......\key.crf
........\......\key.d
........\......\key.o
........\......\key.__i
........\......\key4x4.crf
........\......\key4x4.d
........\......\key4x4.o
........\......\led.crf
........\......\led.d
........\......\led.o
........\......\led.__i
........\......\main.crf
........\......\main.d
........\......\main.o
........\......\misc.crf
........\......\misc.d
........\......\misc.o
........\......\smg.crf
........\......\smg.d
........\......\smg.o
........\......\startup_stm32f10x_hd.d
........\......\startup_stm32f10x_hd.lst
........\......\startup_stm32f10x_hd.o
........\......\startup_stm32f10x_md.d
........\......\startup_stm32f10x_md.lst
........\......\startup_stm32f10x_md.o
........\......\stm32f10x_exti.crf
........\......\stm32f10x_exti.d
........\......\stm32f10x_exti.o
........\......\stm32f10x_gpio.crf
........\......\stm32f10x_gpio.d
........\......\stm32f10x_gpio.o
........\......\stm32f10x_it.crf

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