RT1052 when using DAP download tool Download the download failed because in addition to the reasons set those problems caused by the Internet, it is also a possible SWD interface is closed, the specific reasons unknown;
Solution:
Put another way to start (boot by adjusting the switching power supply situation), such as a promoter from the nor-flash, starting on the first adjustment (adjustment purposes herein only in order not to run the program 1052 from the original board sd card, so no SD card is inserted, preventing the execution of program 1052 after power-1052), and then to re-power the board, then the program can be downloaded, the download is complete, the power switch to restore the boot from the start line nor-flash