65 lines
1.9 KiB
Plaintext
65 lines
1.9 KiB
Plaintext
README
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======
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This directory holds NuttX board support for the TI LaunchXL-CC1312R1.
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Contents
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========
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o Status
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o Serial Console
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o LEDs and Buttons
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o Version 1 or 2?
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o Running from SRAM
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Status
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======
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2018-12-03: Fragmentary board support in place. The initial intent
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of this board support is simply to assist in the CC13xx architecture
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development. Serious board development will occur later. Board
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support is missing LED and button support.
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Serial Console
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==============
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The on-board XDS110 Debugger provide a USB virtual serial console using
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UART0 (PA0/U0RX and PA1/U0TX).
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LEDs and Buttons
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================
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LEDs
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----
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Buttons
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-------
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Version 1 or 2?
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===============
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Two versions of the CC1312R1 are supported selected by CONFIG_ARCH_CHIP_CC13XX_V1
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or CONFIG_ARCH_CHIP_CC13XX_V2. How can you tell which one you have?
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Perhaps you can tell by the markings on the chip, but I do not have the
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secret decoder ring necessary to do that.
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What you can do is enable CONFIG_DEBUG_ASSERTIONS. The firmware can
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determine which version you have by looking at register contents. The
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firmware will assert if you select the wrong version. If that occurs,
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switch to the other version and the assertion should go away.
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Running from SRAM
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=================
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The LaunchXL-CC1312R1 port supports execution from RAM. Execution from
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SRAM as a "safe" way to bring up a new board port without concern about
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borking the board because of a bad FLASH image.
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if CONFIG_BOOT_RUNFROMFLASH=y is set in the configuration, then the code
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will build to run from FLASH. Otherwise (presumably CONFIG_BOOT_RUNFROMSRAM=y)
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the code will build to run from SRAM. This is determined by the Make.defs
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file in the scripts/ sub-directory. Based on those configuration
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settings, either scripts/flash.ld or sram.ld will be selected as the
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linker script file to be used.
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