this halves the number of flash writes needed, and makes flash storage
twice as space efficient on H7
On H7 we need to write 32 bytes at a time to flash, which corresponds
to 30 bytes of data in AP_FlashStorage. By using a 16 byte storage
line we don't waste as much space
we have now shown that interrupts being enabled during flash
operations can cause the infamous "68ms" bug, or watchdog when using a
32 bit timer on boards using flash for storage
The issue is quite repeatable with a load of a very large waypoint
file (over 500 waypoints) using "wp ftpload" in MAVProxy. This puts a
huge load on flash storage.
Our current working theory is that while doing flash writes for
storage on dual-bank we block access to only one bank, so if another
thread uses a timeout function with a short timeout while the flash
write is happening and chVTDoTickI calls code which crosses the flash
bank boundary then it can cause chVTDoTickI to violate the assumption
that no more than CH_CFG_ST_DELTA ticks pass while it is calculating
the value to set in the system timer. In that case we get a delay of a
full timer wrap, which is 68ms on boards with 16 bit timer and 70
minutes on boards with 32 bit timer
this prevents bad calculated timeouts in DShot. The timeout would
sometimes come out as 0xFFFFFFFF, which led to an assert and could
block the thread
This fix is meant to be minimilistic to allow it to be merged easily
into 4.2. A better fix would fix all the uint32_t wrap handling in
DShot
make sure debug will compile
take into account active channels when configuring bdshot
add channel mask debug output
correct set bdshot telemetry position at startup
make sure all channels in a bdshot group are pulled high to prevent spurious pulses
this saves flash space and makes CAN forwarding for any bus without
reconfigure/reboot easy. CAN filtering is not useful in the main
flight controller firmware as we want to see nearly all packets
hwdef for DevEBoxH7v2
pin definitions for STM32H750
add QSPI to DevEBox bootloader
add external flash to DevEBox
rename EXTERNAL_PROG_FLASH_MB to EXT_FLASH_SIZE_MB
Add support for EXT_FLASH_RESERVE_START_KB and EXT_FLASH_RESERVE_END_KB
Disable HAL_ENABLE_SAVE_PERSISTENT_PARAMS when there is no bootloader flash available
relax storage health status with SD card backend
don't check SD card health unless USE_POSIX
binary sections rearranged on external ram
manage RAMFUNC through ldscript and optimize function placement in external flash
inline timer functions
optimize placement of ChibiOS and functions in ITCM and AXI RAM
fix chibios features on bootloader build with external flash
change H750 memory layout
increase line storage for SD card based parameters
comment external flash linker script
move vtables into DTCM
update ram map for H757
enable crashdump support with external flash
correct bootloader pins and generator on SPRacingH7/DevEBoxH7v2
setup external flash reserve regions
allow different RAM_MAP for external flash on H750 and H757
