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This allows UART RX to function while flash erase/writes operations are
under way, preventing lost serial data so long as it fits in the UART RX
buffer.
This enables (among other things) mpremote to successfully copy files to
boards that use a UART REPL.
Enable via the following option placed in `mpconfigboard.mk`:
MICROPY_HW_ENABLE_ISR_UART_FLASH_FUNCS_IN_RAM = 1
Signed-off-by: Andrew Leech <andrew.leech@planetinnovation.com.au>
39 lines
1.7 KiB
Plaintext
39 lines
1.7 KiB
Plaintext
/*
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GNU linker script for STM32F439
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*/
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/* Specify the memory areas */
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MEMORY
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{
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FLASH (rx) : ORIGIN = 0x08000000, LENGTH = 2048K /* entire flash */
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FLASH_START (rx): ORIGIN = 0x08000000, LENGTH = 16K /* sector 0 */
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FLASH_TEXT (rx) : ORIGIN = 0x08020000, LENGTH = 896K /* sectors 5-11 are 128K */
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FLASH_FS (rx) : ORIGIN = 0x08100000, LENGTH = 192K /* sectors 12-15 are 16K, 16 is 64K, 17 is 128K (64K used) */
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FLASH_FS2 (rx) : ORIGIN = 0x08140000, LENGTH = 64K /* sector 18 is 128K (64K used) */
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RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 192K
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CCMRAM (xrw) : ORIGIN = 0x10000000, LENGTH = 64K
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}
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/* produce a link error if there is not this amount of RAM for these sections */
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_minimum_stack_size = 2K;
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_minimum_heap_size = 16K;
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/* Define the stack. The stack is full descending so begins just above last byte
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of RAM. Note that EABI requires the stack to be 8-byte aligned for a call. */
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_estack = ORIGIN(RAM) + LENGTH(RAM) - _estack_reserve;
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_sstack = _estack - 16K; /* tunable */
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/* RAM extents for the garbage collector */
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_ram_start = ORIGIN(RAM);
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_ram_end = ORIGIN(RAM) + LENGTH(RAM);
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_heap_start = _ebss; /* heap starts just after statically allocated memory */
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_heap_end = _sstack;
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/* Filesystem cache in RAM, and storage in flash */
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_micropy_hw_internal_flash_storage_ram_cache_start = ORIGIN(CCMRAM);
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_micropy_hw_internal_flash_storage_ram_cache_end = ORIGIN(CCMRAM) + LENGTH(CCMRAM);
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_micropy_hw_internal_flash_storage_start = ORIGIN(FLASH_FS);
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_micropy_hw_internal_flash_storage_end = ORIGIN(FLASH_FS) + LENGTH(FLASH_FS);
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_micropy_hw_internal_flash_storage2_start = ORIGIN(FLASH_FS2);
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_micropy_hw_internal_flash_storage2_end = ORIGIN(FLASH_FS2) + LENGTH(FLASH_FS2);
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