Stm32f103rbt6 drive 4 x4 keyboard scan

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.......\code
.......\....\EXTI.C
.......\....\EXTI.H
.......\....\KeyScan.c
.......\....\KeyScan.h
.......\....\SysTick.c
.......\....\SysTick.h
.......\....\USART.C
.......\....\USART.H
.......\lib
.......\...\eval
.......\...\....\Common
.......\...\....\......\fonts.c
.......\...\....\......\fonts.h
.......\...\....\......\stm32_eval_i2c_ee.c
.......\...\....\......\stm32_eval_i2c_ee.h
.......\...\....\......\stm32_eval_i2c_tsensor.c
.......\...\....\......\stm32_eval_i2c_tsensor.h
.......\...\....\......\stm32_eval_sdio_sd.c
.......\...\....\......\stm32_eval_sdio_sd.h
.......\...\....\......\stm32_eval_spi_flash.c
.......\...\....\......\stm32_eval_spi_flash.h
.......\...\....\......\stm32_eval_spi_sd.c
.......\...\....\......\stm32_eval_spi_sd.h
.......\...\....\STM32100B_EVAL
.......\...\....\..............\stm32100b_eval.c
.......\...\....\..............\stm32100b_eval.h
.......\...\....\..............\stm32100b_eval_cec.c
.......\...\....\..............\stm32100b_eval_cec.h
.......\...\....\..............\stm32100b_eval_lcd.c
.......\...\....\..............\stm32100b_eval_lcd.h
.......\...\....\STM32100E_EVAL
.......\...\....\..............\stm32100e_eval.c
.......\...\....\..............\stm32100e_eval.h
.......\...\....\..............\stm32100e_eval_cec.c
.......\...\....\..............\stm32100e_eval_cec.h
.......\...\....\..............\stm32100e_eval_fsmc_onenand.c
.......\...\....\..............\stm32100e_eval_fsmc_onenand.h
.......\...\....\..............\stm32100e_eval_fsmc_sram.c
.......\...\....\..............\stm32100e_eval_fsmc_sram.h
.......\...\....\..............\stm32100e_eval_ioe.c
.......\...\....\..............\stm32100e_eval_ioe.h
.......\...\....\..............\stm32100e_eval_lcd.c
.......\...\....\..............\stm32100e_eval_lcd.h
.......\...\....\STM3210B_EVAL
.......\...\....\.............\stm3210b_eval.c
.......\...\....\.............\stm3210b_eval.h
.......\...\....\.............\stm3210b_eval_lcd.c
.......\...\....\.............\stm3210b_eval_lcd.h
.......\...\....\STM3210C_EVAL
.......\...\....\.............\stm3210c_eval.c
.......\...\....\.............\stm3210c_eval.h
.......\...\....\.............\stm3210c_eval_ioe.c
.......\...\....\.............\stm3210c_eval_ioe.h
.......\...\....\.............\stm3210c_eval_lcd.c
.......\...\....\.............\stm3210c_eval_lcd.h
.......\...\....\STM3210E_EVAL
.......\...\....\.............\stm3210e_eval.c
.......\...\....\.............\stm3210e_eval.h
.......\...\....\.............\stm3210e_eval_fsmc_nand.c
.......\...\....\.............\stm3210e_eval_fsmc_nand.h
.......\...\....\.............\stm3210e_eval_fsmc_nor.c
.......\...\....\.............\stm3210e_eval_fsmc_nor.h
.......\...\....\.............\stm3210e_eval_fsmc_sram.c
.......\...\....\.............\stm3210e_eval_fsmc_sram.h
.......\...\....\.............\stm3210e_eval_lcd.c
.......\...\....\.............\stm3210e_eval_lcd.h
.......\...\....\STM32L152_EVAL
.......\...\....\..............\stm32l152_eval.c
.......\...\....\..............\stm32l152_eval.h
.......\...\....\..............\stm32l152_eval_glass_lcd.c
.......\...\....\..............\stm32l152_eval_glass_lcd.h
.......\...\....\..............\stm32l152_eval_i2c_ee.c
.......\...\....\..............\stm32l152_eval_i2c_ee.h
.......\...\....\..............\stm32l152_eval_lcd.c
.......\...\....\..............\stm32l152_eval_lcd.h
.......\...\....\stm32_eval.c
.......\...\....\stm32_eval.h
.......\...\inc
.......\...\...\misc.h
.......\...\...\stm32f10x_adc.h
.......\...\...\stm32f10x_bkp.h
.......\...\...\stm32f10x_can.h
.......\...\...\stm32f10x_cec.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
.......\...\...\

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