The hw rev 4 and 5 both have the version stored in the Data1 user option
byte. This frees up the hw rev strapping pins for other uses, ie swtrace
decoding using USART1 RX, and additional peripherals on the SPI bus,
like bulk flash storage and displays.
lock_flash and lock_bootprot currently support only locking the whole flash and locking the maximal leading flash chunk (32k).
An optional numerical parameter is added. It can be specified in decimal or 0x prefixed hexadecimal.
For samd21 'lock_bootprot 0' locks the first 32k of flash while 'lock_bootprot 6' locks the first 512 bytes. 'lock_bootprot 0' is equivalent to 'unlock_bootprot'.
Similarly, 'lock_flash <number>' locks the flash segments corresponding to zeros in the binary representation of the given number.
'lock_flash 0xffff' is equivalent to 'unlock_flash'.
If the optional parameter is not given both commands work as previously.
The SAMD09 CPU is used in boards such as the Adafruit Seesaw. It has a
smaller amount of memory and flash than other SAMD ports.
This was tested with an Adafruit Seesaw. These boards come with preloaded
firmware. As a test, the firmware was dumped and flash was erased. Then,
flash was verified to be all zeroes. Finally, the firmware was loaded
back in:
(gdb) p/x *(unsigned int *)0@32
$8 = {0x20000f88, 0x1db, 0x1d1, 0x1d9, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1d9, 0x0, 0x0, 0xf5, 0x1081, 0x1d9, 0x1d9, 0x1d9, 0x1d9, 0x1d9, 0x1d9, 0x1d9, 0x0, 0x1d9, 0x1d9, 0x25e9, 0x0,
0x0, 0x1d9, 0x1d9, 0x1d9}
(gdb) dump ihex memory flash.ihex 0 8192
(gdb) mon erase_mass
Erase successful!
(gdb) p/x *(unsigned int *)0@32
$9 = {0xffffffff <repeats 32 times>}
(gdb) load flash.ihex
Loading section .sec1, size 0x2000 lma 0x0
Start address 0x00000000, load size 8192
Transfer rate: 5 KB/sec, 910 bytes/write.
(gdb) p/x *(unsigned int *)0@32
$10 = {0x20000f88, 0x1db, 0x1d1, 0x1d9, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1d9, 0x0, 0x0, 0xf5, 0x1081, 0x1d9, 0x1d9, 0x1d9, 0x1d9, 0x1d9, 0x1d9, 0x1d9, 0x0, 0x1d9, 0x1d9, 0x25e9, 0x0,
0x0, 0x1d9, 0x1d9, 0x1d9}
(gdb)
Signed-off-by: Sean Cross <sean@xobs.io>
Various SAMD devices have different amounts of memory. Up until now, all
SAMD devices have had the same amount, and therefore this value was
hardcoded to 32k of RAM and 256k of flash.
Add a parameter to the description field and set it to default to the
previous values. Use this description field when adding memories to the
target definition.
Signed-off-by: Sean Cross <sean@xobs.io>
The variable `start_time` indicates when a CRC32 operation began. This
variable is used to benchmark the speed of the CRC32 function.
Currently, this is tied to `PC_HOSTED`. However, the actual usage is
tied to `DEBUG_WARN`. This means that the variable is undefined when
`DEBUG_WARN` is defined and we're not configured for `PC_HOSTED` mode.
Add macro guards around this variable so that it is defined when
debugging is enabled, rather than only when building on `PC_HOSTED`.
Signed-off-by: Sean Cross <sean@xobs.io>
