tools/bootloader: add force-erase option

If the STM32H7 fails to program or erase a full chunk of 256 bytes, the
ECC check will trigger a busfault when trying to read from it.

To speed up erasing and optimize wear, we read before erasing to check
if it actually needs erasing. That's when a busfault happens and the
erase time outs.

The workaround is to add an option to do a full erase without check.

Credit goes to:
ArduPilot/ardupilot#22090

And the protocol option added to the bootloader is the same as for
ArduPilot, so compatible.

Signed-off-by: Julian Oes <[email protected]>

platforms/nuttx/src/bootloader/nxp/imxrt_common/main.c

@@ -432,13 +432,19 @@ flash_func_erase_sector(unsigned sector, bool force)
 		return;
 	}
 
+<<<<<<< HEAD
 	if (force || up_progmem_ispageerased(sector) != 0) {
 
 		struct flexspi_nor_config_s *pConfig = &g_bootConfig;
 
 		const uint32_t bytes_per_sector =  flash_func_sector_size(sector);
 		uint32_t *address = (uint32_t *)(IMXRT_FLEXSPI1_CIPHER_BASE + (sector * bytes_per_sector));
 
+=======
+	if (force || flash_func_is_sector_blank(sector) != 0) {
+		struct flexspi_nor_config_s *pConfig = &g_bootConfig;
+
+>>>>>>> 21e550fdba (tools/bootloader: add force-erase option)
 		uintptr_t offset = ((uintptr_t) address) - IMXRT_FLEXSPI1_CIPHER_BASE;
 		irqstate_t flags;
 		flags = enter_critical_section();