2fb866ca86
This is just support for the chip, no boards are currently supported.
However, you can use this target on a custom board.
Notes:
- This required a new runtime and machine implementation, because the
hardware is actually very different (and much nicer than older
AVRs!).
- I had to update gen-device-avr to support this chip. This also
affects the generated output of other AVRs, but I checked all chips
we support and there shouldn't be any backwards incompatible
changes.
- I did not implement peripherals like UART, I2C, SPI, etc because I
don't need them. That is left to do in the future.
You can flash these chips with only a UART and a 1kOhm resistor, which
is really nice (no special hardware needed). Here is the program I've
used for this purpose: https://pypi.org/project/pymcuprog/
58 строки
1,5 КиБ
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58 строки
1,5 КиБ
Text
/* Linker script for AVRs with a unified flash and RAM address space. This
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* includes the ATtiny10 and the ATtiny1616.
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*/
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MEMORY
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{
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FLASH_TEXT (x) : ORIGIN = 0, LENGTH = __flash_size
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FLASH_DATA (r) : ORIGIN = __mapped_flash_start, LENGTH = __flash_size
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RAM (xrw) : ORIGIN = __ram_start, LENGTH = __ram_size
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}
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ENTRY(main)
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SECTIONS
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{
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.text :
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{
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KEEP(*(.vectors))
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*(.text.__vector_RESET)
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KEEP(*(.text.__do_copy_data)) /* TODO: only use when __do_copy_data is requested */
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KEEP(*(.text.__do_clear_bss))
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KEEP(*(.text.main)) /* main must follow the reset handler */
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*(.text)
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*(.text.*)
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} > FLASH_TEXT
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/* Read-only data is stored in flash, but is read from an offset (0x4000 or
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* 0x8000 depending on the chip). This requires some weird math to get it in
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* the right place.
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*/
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.rodata ORIGIN(FLASH_DATA) + ADDR(.text) + SIZEOF(.text):
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{
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*(.rodata)
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*(.rodata.*)
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} AT>FLASH_TEXT
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/* The address to which the data section should be copied by the startup
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* code.
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*/
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__data_load_start = ORIGIN(FLASH_DATA) + LOADADDR(.data);
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.data :
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{
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__data_start = .; /* used by startup code */
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*(.data)
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*(.data*)
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__data_end = .; /* used by startup code */
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} >RAM AT>FLASH_TEXT
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.bss :
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{
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__bss_start = .; /* used by startup code */
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*(.bss)
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*(.bss*)
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*(COMMON)
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__bss_end = .; /* used by startup code */
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} >RAM
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}
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