DM642 serial debugging module, I tested through the serial port, you can use

vcmuart
.......\evmdm642bsl
.......\...........\cc_build_Debug.log
.......\...........\Debug
.......\...........\Debug.lkf
.......\...........\Debug.lkv
.......\...........\evmdm642.c
.......\...........\evmdm642bsl.paf
.......\...........\evmdm642bsl.pjt
.......\...........\evmdm642_aic23_closecodec.c
.......\...........\evmdm642_aic23_loopback.c
.......\...........\evmdm642_aic23_mute.c
.......\...........\evmdm642_aic23_opencodec.c
.......\...........\evmdm642_aic23_outgain.c
.......\...........\evmdm642_aic23_powerdown.c
.......\...........\evmdm642_aic23_read.c
.......\...........\evmdm642_aic23_registers.c
.......\...........\evmdm642_aic23_setfreq.c
.......\...........\evmdm642_aic23_write.c
.......\...........\evmdm642_apll.c
.......\...........\evmdm642_eeprom.c
.......\...........\evmdm642_flash_checksum.c
.......\...........\evmdm642_flash_erase.c
.......\...........\evmdm642_flash_read.c
.......\...........\evmdm642_flash_write.c
.......\...........\evmdm642_fpga.c
.......\...........\evmdm642_led.c
.......\...........\evmdm642_pci.c
.......\...........\evmdm642_uart.c
.......\evmdm642bsl.lib
.......\include
.......\.......\evmdm642.h
.......\.......\evmdm642osd.h
.......\.......\evmdm642_aic23.h
.......\.......\evmdm642_apll.h
.......\.......\evmdm642_dip.h
.......\.......\evmdm642_eeprom.h
.......\.......\evmdm642_flash.h
.......\.......\evmdm642_led.h
.......\.......\evmdm642_pci.h
.......\.......\evmdm642_uart.h
.......\.......\osdcolor.h
.......\.......\osdutil.h
.......\testuart
.......\........\cc_build_Debug.log
.......\........\Debug
.......\........\Debug.lkf
.......\........\Debug.lkv
.......\........\testuart.c
.......\........\testuart.cdb
.......\........\testuart.paf
.......\........\testuart.pjt
.......\........\testuartcfg.cmd
.......\........\testuartcfg.h
.......\........\testuartcfg.h62
.......\........\testuartcfg.s62
.......\........\testuartcfg_c.c

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