stm32f4 series use the library functions developed project template, the timer overflow interrupt 1s count by the test is still relatively accurate. Need other functions simply add other modules and code.

TIMER3\CORE\core_cm4.h
......\....\core_cmFunc.h
......\....\core_cmInstr.h
......\....\core_cmSimd.h
......\....\startup_stm32f40_41xxx.s
......\ExtDll.iex
......\FWLIB\inc\misc.h
......\.....\...\stm32f4xx_adc.h
......\.....\...\stm32f4xx_can.h
......\.....\...\stm32f4xx_cec.h
......\.....\...\stm32f4xx_crc.h
......\.....\...\stm32f4xx_cryp.h
......\.....\...\stm32f4xx_dac.h
......\.....\...\stm32f4xx_dbgmcu.h
......\.....\...\stm32f4xx_dcmi.h
......\.....\...\stm32f4xx_dfsdm.h
......\.....\...\stm32f4xx_dma.h
......\.....\...\stm32f4xx_dma2d.h
......\.....\...\stm32f4xx_dsi.h
......\.....\...\stm32f4xx_exti.h
......\.....\...\stm32f4xx_flash.h
......\.....\...\stm32f4xx_flash_ramfunc.h
......\.....\...\stm32f4xx_fmc.h
......\.....\...\stm32f4xx_fmpi2c.h
......\.....\...\stm32f4xx_fsmc.h
......\.....\...\stm32f4xx_gpio.h
......\.....\...\stm32f4xx_hash.h
......\.....\...\stm32f4xx_i2c.h
......\.....\...\stm32f4xx_iwdg.h
......\.....\...\stm32f4xx_lptim.h
......\.....\...\stm32f4xx_ltdc.h
......\.....\...\stm32f4xx_pwr.h
......\.....\...\stm32f4xx_qspi.h
......\.....\...\stm32f4xx_rcc.h
......\.....\...\stm32f4xx_rng.h
......\.....\...\stm32f4xx_rtc.h
......\.....\...\stm32f4xx_sai.h
......\.....\...\stm32f4xx_sdio.h
......\.....\...\stm32f4xx_spdifrx.h
......\.....\...\stm32f4xx_spi.h
......\.....\...\stm32f4xx_syscfg.h
......\.....\...\stm32f4xx_tim.h
......\.....\...\stm32f4xx_usart.h
......\.....\...\stm32f4xx_wwdg.h
......\.....\src\misc.c
......\.....\...\stm32f4xx_adc.c
......\.....\...\stm32f4xx_can.c
......\.....\...\stm32f4xx_cec.c
......\.....\...\stm32f4xx_crc.c
......\.....\...\stm32f4xx_cryp.c
......\.....\...\stm32f4xx_cryp_aes.c
......\.....\...\stm32f4xx_cryp_des.c
......\.....\...\stm32f4xx_cryp_tdes.c
......\.....\...\stm32f4xx_dac.c
......\.....\...\stm32f4xx_dbgmcu.c
......\.....\...\stm32f4xx_dcmi.c
......\.....\...\stm32f4xx_dfsdm.c
......\.....\...\stm32f4xx_dma.c
......\.....\...\stm32f4xx_dma2d.c
......\.....\...\stm32f4xx_dsi.c
......\.....\...\stm32f4xx_exti.c
......\.....\...\stm32f4xx_flash.c
......\.....\...\stm32f4xx_flash_ramfunc.c
......\.....\...\stm32f4xx_fmc.c
......\.....\...\stm32f4xx_fmpi2c.c
......\.....\...\stm32f4xx_fsmc.c
......\.....\...\stm32f4xx_gpio.c
......\.....\...\stm32f4xx_hash.c
......\.....\...\stm32f4xx_hash_md5.c
......\.....\...\stm32f4xx_hash_sha1.c
......\.....\...\stm32f4xx_i2c.c
......\.....\...\stm32f4xx_iwdg.c
......\.....\...\stm32f4xx_lptim.c
......\.....\...\stm32f4xx_ltdc.c
......\.....\...\stm32f4xx_pwr.c
......\.....\...\stm32f4xx_qspi.c
......\.....\...\stm32f4xx_rcc.c
......\.....\...\stm32f4xx_rng.c
......\.....\...\stm32f4xx_rtc.c
......\.....\...\stm32f4xx_sai.c
......\.....\...\stm32f4xx_sdio.c
......\.....\...\stm32f4xx_spdifrx.c
......\.....\...\stm32f4xx_spi.c
......\.....\...\stm32f4xx_syscfg.c
......\.....\...\stm32f4xx_tim.c
......\.....\...\stm32f4xx_usart.c
......\.....\...\stm32f4xx_wwdg.c
......\main.crf
......\main.d
......\main.o
......\misc.crf
......\misc.d
......\misc.o
......\startup_stm32f40_41xxx.d
......\startup_stm32f40_41xxx.o
......\stm32f4xx_adc.crf
......\stm32f4xx_adc.d
......\stm32f4xx_adc.o
......\stm32f4xx_can.crf
......\stm32f4xx_can.d

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