Hello,
I am trying to write a bootloader for STM32L496(ZGT) and I am pretty new to ARM and RTX.The Bootloader works over USB HID and uses RTX5 (RTOS 2). I use µVision V5.36 with compilter V6.16 (With AC5 like warnings).
I encounter a strange behavior. If I use optimization level o0 my Jump function "failes". I jump but get stuck in the main app. As far as I know at some point where some IRQ should be disabled.If I use level o1 it jumps.
My Jump funcion:
typedef void (*pFunction)(void); void JumpToApplication(uint32_t uiAppAdress) { uint32_t JumpAddress = *(__IO uint32_t*)(uiAppAdress + 4); pFunction Jump = (pFunction)JumpAddress; HAL_RCC_DeInit(); HAL_DeInit(); NVIC->ICER[ 0 ] = 0xFFFFFFFF ; NVIC->ICER[ 1 ] = 0xFFFFFFFF ; NVIC->ICER[ 2 ] = 0xFFFFFFFF ; NVIC->ICER[ 3 ] = 0xFFFFFFFF ; NVIC->ICER[ 4 ] = 0xFFFFFFFF ; NVIC->ICER[ 5 ] = 0xFFFFFFFF ; NVIC->ICER[ 6 ] = 0xFFFFFFFF ; NVIC->ICER[ 7 ] = 0xFFFFFFFF ; NVIC->ICPR[ 0 ] = 0xFFFFFFFF ; NVIC->ICPR[ 1 ] = 0xFFFFFFFF ; NVIC->ICPR[ 2 ] = 0xFFFFFFFF ; NVIC->ICPR[ 3 ] = 0xFFFFFFFF ; NVIC->ICPR[ 4 ] = 0xFFFFFFFF ; NVIC->ICPR[ 5 ] = 0xFFFFFFFF ; NVIC->ICPR[ 6 ] = 0xFFFFFFFF ; NVIC->ICPR[ 7 ] = 0xFFFFFFFF ; SCB->ICSR |= SCB_ICSR_PENDSTCLR_Msk ; SCB->SHCSR &= ~( SCB_SHCSR_USGFAULTENA_Msk | SCB_SHCSR_BUSFAULTENA_Msk | SCB_SHCSR_MEMFAULTENA_Msk ) ; SysTick->CTRL = 0; SysTick->LOAD = 0; SysTick->VAL = 0; SCB->VTOR = uiAppAdress; __set_CONTROL(0x00000000); __set_MSP(*(__IO uint32_t*)uiAppAdress); Jump(); }
Maybe anyone has an idea why it get stucks?
Thanks Stefan