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document flashing procedure for sysmoOCTSIM 

the sysmoOCTSIM board does not have an onboard EDBG adapter such as
the SAM E54 Xplained Pro board.
instead SWD is used directly.

Change-Id: I85aa4db62464d0a1b558968d0423e2adbe491a4f
This commit is contained in:
Kevin Redon 2019-02-03 13:59:26 +01:00
parent 3a64538b32
commit 5078232cce
1 changed files with 12 additions and 10 deletions
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22
README.md
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@ -1,8 +1,7 @@
This is an implementation of the DFU mode of the [USB DFU Device Class Specification](https://usb.org/document-library/device-firmware-upgrade-11-new-version-31-aug-2004) for the Microchip SAM D5x/E5x micro-controller. This is an implementation of the DFU mode of the [USB DFU Device Class Specification](https://usb.org/document-library/device-firmware-upgrade-11-new-version-31-aug-2004) for the Microchip SAM D5x/E5x micro-controller.
It is meant to be used as bootloader to allow flashing the main application over USB. It is meant to be used as bootloader to allow flashing the main application over USB.
The code has been developed for the Microchip [SAM E54 Xplained Pro](https://www.microchip.com/DevelopmentTools/ProductDetails/PartNo/ATSAME54-XPRO) development board using a [SAM E54](https://www.microchip.com/wwwproducts/en/ATSAME54P20A) micro-controller. This branch is specific to the proprietary sysmocom sysmoOCTSIM hardware.
It should work on any chip of the SAM D5x/E5x device family by replacing the corresponding device-specific definitions (usually including the chip name in the file name).
The code uses the [Atmel START](https://start.atmel.com/) ASFv4 library. The code uses the [Atmel START](https://start.atmel.com/) ASFv4 library.
@ -31,7 +30,7 @@ The resulting firmware binary is `AtmelStart.bin`.
Flashing Flashing
======== ========
To flash the bootloader you can either use the [edbg tool](https://github.com/ataradov/edbg) over the EDBG interface of the SAM E54 Xplained Pro development board, or OpenICD with any SWJ adapter. To flash the bootloader you can use OpenOCD with any SWJ adapter.
The USB DFU bootloader should be flashed in a protected area of the flash memory to prevent for erasing it, as specified in data sheet section 25.6.2 Memory Organization. The USB DFU bootloader should be flashed in a protected area of the flash memory to prevent for erasing it, as specified in data sheet section 25.6.2 Memory Organization.
The bootloader size is configured in the NVM user configuration BOOTPROT field, as specified in data sheet section 25.6.9 NVM User Configuration. The bootloader size is configured in the NVM user configuration BOOTPROT field, as specified in data sheet section 25.6.9 NVM User Configuration.
@ -40,11 +39,14 @@ We need to reserve as least 2 pages of 8192 bytes for the bootloader since it is
This setting will also tell the bootloader where to flash the application firmware to (e.g. after the bootloader reserved space). This setting will also tell the bootloader where to flash the application firmware to (e.g. after the bootloader reserved space).
The LED will blink once per second if this size is not set. The LED will blink once per second if this size is not set.
EDBG ST-LINK/V2
---- ----------
To flash the USB DFU bootloader, perform the following actions: To flash the USB DFU bootloader, we will use OpenOCD (with the [SAM E54 patch](http://openocd.zylin.com/#/c/4272/) and a ST-LINK/V2 SWD adapter.
* remove reserved bootloader space so we can erase it: `edbg --target atmel_cm4v2 --fuse wv,29:26,15` The command will perform the following actions:
* erase the whole flash: `edbg --target atmel_cm4v2 --fuse v,29:26,15 --erase` * remove reserved bootloader space so we can erase it (and reset MCU for change to be effective)
* program the bootloader: `edbg --target atmel_cm4v2 --fuse v,29:26,15 --program --verify --file AtmelStart.bin` * erase the whole flash
* reserve bootloader space: `edbg --target atmel_cm4v2 --fuse wv,29:26,13` * program the bootloader
* reserve bootloader space
`openocd --file interface/stlink.cfg --command "transport select hla_swd" --command "set CHIPNAME same54" --command "set CPUTAPID 0x2ba01477" --file target/atsame5x.cfg --command "init" --command "reset halt" --command "atsame5 bootloader 0" --command "flash erase_sector 0 0 last" --command "reset halt" --command "program ./AtmelStart.bin" --command "atsame5 bootloader 16384" --command "reset run" --command "shutdown"`