Uncomment the corresponding line (see below) Note: For Prime_Calc_SRAM() you must change prototype and function definition.Ģ. Open system_stm32u5xx.c and search for #define VECT_TAB_SRAM symbol. Remove the _attribute_ ((section(".RamFunc"))) in the Prime_Calc_SRAM() and in the EXTI13_IRQHandler(). It is still based on the same project used in the previous steps.ġ. This third part describes the steps to link and execute a full STM32 project in SRAM using STM32CubeIDE. It can be used to place and execute a single or several interrupts’ handlers in the embedded SRAM.Ĭase 3: Placing and executing an entire project in SRAM (code and interrupts). This task is managed by the Reset_Handler: LoopCopyDataInit in the startup_stm32u575zitxq.s assembly file.ġ3. Select Run -> Remove all Breakpoints and stop the debug session.Ĭonclusion: This example is equivalent to the previous chapter. ![]() In our case, the function Prime_Calc_SRAM() will be copied from flash memory to SRAM1 after reset. The command >RAM AT> FLASH is used to inform the linker to resolve by copying from the flash memory to RAM at startup initialization, all the symbols defined with these placement section configurations. * create a global symbol at data start */ * Initialized data sections into "RAM" Ram type memory */ _user_heap_stack) in RAM.įor us, our goal is to use a section placement that is defined in section. Next, we can see the section dedicated for interrupt vector (.isr_vector), placed by default at the beginning of the flash memory, then the program code (.text) also in flash memory and variable, bss heap, and stack in (.data. Then the linker file contains predefined sections. Refer to STM32U5 Reference manual chapter Memory organization ( RM0456) for a full description of the memory organization in the device. The STM32U5 embeds several memories, these definitions are used as physical location in order to inform the linker what section to place each firmware symbol, code and data. Open the linker file STM32U575ZITXQ_FLASH.ld and take a look at the memories definition below: In this example we will create a basic function called Prime_Calc_SRAM() in charge of computing an amount of Prime number in a given interval.ġ2. This part describes the steps to link and execute a C function in SRAM using STM32CubeIDE. STM32CubeIDE and STM32Cube_FW_U5_V1.2.0.Ĭase 1: Placing and executing a function in SRAM. ![]() ![]()
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