a2e1867f69
Tested & working: * Send standard packets * Receive standard packets (1 FIFO, no filter) Interoperation between SAM E54 Xplained running this tree and MicroPython running on STM32F405 Feather with an external transceiver was also tested. Many other aspects of a full implementation are not yet present, such as error detection and recovery.
93 lines
3.2 KiB
Plaintext
93 lines
3.2 KiB
Plaintext
/* Template for SAMD21/SAMD51 linking. dollar-sign-curly-bracket items are replaced with strings. */
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/* Specify the memory areas */
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MEMORY
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{
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FLASH_BOOTLOADER (rx): ORIGIN = ${BOOTLOADER_START_ADDR}, LENGTH = ${BOOTLOADER_SIZE}
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FLASH_FIRMWARE (rx) : ORIGIN = ${CIRCUITPY_FIRMWARE_START_ADDR}, LENGTH = ${CIRCUITPY_FIRMWARE_SIZE}
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FLASH_FILESYSTEM (r) : ORIGIN = ${CIRCUITPY_INTERNAL_FLASH_FILESYSTEM_START_ADDR}, LENGTH = ${CIRCUITPY_INTERNAL_FLASH_FILESYSTEM_SIZE}
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FLASH_CONFIG (r) : ORIGIN = ${CIRCUITPY_INTERNAL_CONFIG_START_ADDR}, LENGTH = ${CIRCUITPY_INTERNAL_CONFIG_SIZE}
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FLASH_NVM (r) : ORIGIN = ${CIRCUITPY_INTERNAL_NVM_START_ADDR}, LENGTH = ${CIRCUITPY_INTERNAL_NVM_SIZE}
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RAM (xrw) : ORIGIN = 0x20000000, LENGTH = ${RAM_SIZE}
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}
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/* top end of the stack */
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/* stack must be double-word (8 byte) aligned */
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_estack = ORIGIN(RAM) + LENGTH(RAM) - 8;
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_bootloader_dbl_tap = ORIGIN(RAM) + LENGTH(RAM) - 4;
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/* define output sections */
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SECTIONS
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{
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/* The program code and other data goes into FLASH */
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.text :
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{
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. = ALIGN(4);
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_sfixed = .;
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KEEP(*(.vectors)) /* isr vector table */
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*(.text) /* .text sections (code) */
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*(.text*) /* .text* sections (code) */
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*(.rodata) /* .rodata sections (constants, strings, etc.) */
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*(.rodata*) /* .rodata* sections (constants, strings, etc.) */
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. = ALIGN(4);
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} >FLASH_FIRMWARE
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.ARM.exidx :
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{
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*(.ARM.exidx*)
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*(.gnu.linkonce.armexidx.*)
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_etext = .; /* define a global symbol at end of code */
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_sidata = .; /* start of .data section */
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} >FLASH_FIRMWARE
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/* This is the initialized data section
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The program executes knowing that the data is in the RAM
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but the loader puts the initial values in the FLASH_FIRMWARE (inidata).
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It is one task of the startup to copy the initial values from FLASH_FIRMWARE to RAM. */
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.data : AT ( _sidata )
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{
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. = ALIGN(4);
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_srelocate = .; /* create a global symbol at data start; used by startup code in order to initialize the .data section in RAM */
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. = ALIGN(4);
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*(.ramfunc)
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*(.ramfunc*)
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*(.data) /* .data sections */
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*(.data*) /* .data* sections */
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. = ALIGN(4);
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_erelocate = .; /* define a global symbol at data end; used by startup code in order to initialize the .data section in RAM */
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} >RAM
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/* Uninitialized data section */
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.bss (NOLOAD) :
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{
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. = ALIGN(4);
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_sbss = .;
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_szero = .; /* define a global symbol at bss start; used by startup code */
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/* Data accessed by the CAN peripheral must be in the first 64kB RAM */
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_scanram = .;
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*(.canram)
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_ecanram = .;
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*(.bss)
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*(.bss*)
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*(COMMON)
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. = ALIGN(4);
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_ezero = .; /* define a global symbol at bss end; used by startup code */
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_ebss = .;
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} >RAM
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/* this just checks there is enough RAM for the requested stack. */
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.stack :
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{
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. = ALIGN(4);
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. = . + ${CIRCUITPY_DEFAULT_STACK_SIZE};
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. = ALIGN(4);
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} >RAM
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.ARM.attributes 0 : { *(.ARM.attributes) }
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}
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