Based STM32-U disk dual-channel player schematics, can support two simultaneous music-play, attached with source code, fully tested.

F0803V2 Code
............\CMSIS
............\.....\core_cm3.c
............\.....\core_cm3.h
............\.....\startup
............\.....\.......\startup_stm32f10x_cl.s
............\.....\.......\startup_stm32f10x_hd.s
............\.....\.......\startup_stm32f10x_hd_vl.s
............\.....\.......\startup_stm32f10x_ld.s
............\.....\.......\startup_stm32f10x_ld_vl.s
............\.....\.......\startup_stm32f10x_md.s
............\.....\.......\startup_stm32f10x_md_vl.s
............\.....\.......\startup_stm32f10x_xl.s
............\.....\stm32f10x.h
............\.....\system_stm32f10x.c
............\.....\system_stm32f10x.h
............\ff9
............\...\00readme.txt
............\...\diskio.c
............\...\diskio.h
............\...\ff.c
............\...\ff.h
............\...\ffconf.h
............\...\integer.h
............\...\option
............\...\......\cc932.c
............\...\......\cc936.c
............\...\......\cc949.c
............\...\......\cc950.c
............\...\......\ccsbcs.c
............\...\......\syscall.c
............\FWlib
............\.....\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
............\.....\...\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_cec.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
............\Listing
............\.......\startup_stm32f10x_hd.lst
............\.......\STM32-F0803.map
............\Output
............\......\24c02.crf
............\......\24c02.d
............\......\24c02.o
............\......\24c02.__i
............\......\cc936.crf
............\......\cc936.d
............\......\cc936.o
............\......\cc936.__i
............\......\ch375.crf
............\......\ch375.d
............\......\ch375.o
............\......\ch375hft.d
............\......\ch375hft.__i
............\......\core_cm3.crf
............\......\core_cm3.d
............\......\core_cm3.o

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