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micropython/ports/stm32/boards/stm32l432.ld

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stm32/boards: Add STM32L432KC chip configuration files. The pin alternate function information is derived from ST's datasheet https://www.st.com/resource/en/datasheet/stm32l432kc.pdf In the datasheet, the line 2 of AF4 includes I2C2 but actually the chip does not have I2C2 so it is removed.
2018-12-01 00:26:04 +00:00
/*
GNU linker script for STM32L432KC
*/
/* Specify the memory areas */
MEMORY
{
FLASH (rx) : ORIGIN = 0x08000000, LENGTH = 256K
FLASH_TEXT (rx) : ORIGIN = 0x08000000, LENGTH = 256K
RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 48K
SRAM2 (xrw) : ORIGIN = 0x10000000, LENGTH = 16K
}
/* produce a link error if there is not this amount of RAM for these sections */
_minimum_stack_size = 2K;
_minimum_heap_size = 16K;
stm32: In link script, define start of stack separately from heap end. Previously the end of the heap was the start (lowest address) of the stack. With the changes in this commit these addresses are now independent, allowing a board to place the heap and stack in separate locations.
2019-05-14 15:43:38 +01:00
/* Define the stack. The stack is full descending so begins just above last byte
of RAM. Note that EABI requires the stack to be 8-byte aligned for a call. */
stm32: Enter bootloader via a system reset. Entering a bootloader (ST system bootloader, or custom mboot) from software by directly branching to it is not reliable, and the reliability of it working can depend on the peripherals that were enabled by the application code. It's also not possible to branch to a bootloader if the WDT is enabled (unless the bootloader has specific provisions to feed the WDT). This patch changes the way a bootloader is entered from software by first doing a complete system reset, then branching to the desired bootloader early on in the start-up process. The top two words of RAM (of the stack) are reserved to store flags indicating that the bootloader should be entered after a reset.
2019-06-22 12:26:03 +01:00
_estack = ORIGIN(RAM) + LENGTH(RAM) - _estack_reserve;
stm32: In link script, define start of stack separately from heap end. Previously the end of the heap was the start (lowest address) of the stack. With the changes in this commit these addresses are now independent, allowing a board to place the heap and stack in separate locations.
2019-05-14 15:43:38 +01:00
_sstack = _estack - 6K; /* tunable */
stm32/boards: Add STM32L432KC chip configuration files. The pin alternate function information is derived from ST's datasheet https://www.st.com/resource/en/datasheet/stm32l432kc.pdf In the datasheet, the line 2 of AF4 includes I2C2 but actually the chip does not have I2C2 so it is removed.
2018-12-01 00:26:04 +00:00
/* RAM extents for the garbage collector */
_ram_start = ORIGIN(RAM);
_ram_end = ORIGIN(RAM) + LENGTH(RAM);
_heap_start = _ebss; /* heap starts just after statically allocated memory */
stm32: In link script, define start of stack separately from heap end. Previously the end of the heap was the start (lowest address) of the stack. With the changes in this commit these addresses are now independent, allowing a board to place the heap and stack in separate locations.
2019-05-14 15:43:38 +01:00
_heap_end = _sstack;