freertos startup failure

[yang hong]

Hello,

I am using NUCLEO-STM32F429ZI and FREERTOS (V1). I get board working in ide environment with 3 tasks, but I didn't use Timer to replace SysTickHandler(). After disconnect programming cable and power on my board, the program can't start up because it should have LED1 flashing. Does anybody know what it is happened?

Thank you for any suggestion.