xobs/simmel-bootloader
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Merge branch 'master' of https://github.com/adafruit/Adafruit_nRF52_Bootloader into patch-6

Browse Source 
# Conflicts:
#	src/usb/uf2/ghostfat.c
This commit is contained in:
Henry Gabryjelski
2019-03-13 22:39:12 -07:00
parent 174e6e9724 73456ac80e
commit 6d58633db0
2 changed files with 18 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
src/usb/uf2/ghostfat.c
View File

@@ -177,6 +177,7 @@ static FAT_BootBlock const BootBlock = {
.SectorsPerFAT = SECTORS_PER_FAT,
.SectorsPerTrack = 1,
.Heads = 1,
.PhysicalDriveNum = 0x80, // to match MediaDescriptor of 0xF8
.ExtendedBootSig = 0x29,
.VolumeSerialNumber = 0x00420042,
.VolumeLabel = VOLUME_LABEL,
@@ -190,35 +191,37 @@ static FAT_BootBlock const BootBlock = {
static uint32_t current_flash_size(void)
{
static uint32_t flash_sz = 0;
uint32_t result = flash_sz; // presumes atomic 32-bit read/write and static result
// only need to compute once
if ( flash_sz == 0 )
if ( result == 0 )
{
// return 1 block of 256 bytes
if ( !bootloader_app_is_valid(DFU_BANK_0_REGION_START) )
{
flash_sz = 256;
result = 256;
}else
{
bootloader_settings_t const * boot_setting;
bootloader_util_settings_get(&boot_setting);
flash_sz = boot_setting->bank_0_size;
result = boot_setting->bank_0_size;
// Copy size must be multiple of 256 bytes
// else we will got an issue copying current.uf2
if (flash_sz & 0xff)
if (result & 0xff)
{
flash_sz = (flash_sz & ~0xff) + 256;
result = (result & ~0xff) + 256;
}
// if bank0 size is not valid, happens when flashed with jlink
// use maximum application size
if ( (flash_sz == 0) || (flash_sz == 0xFFFFFFFFUL) )
if ( (result == 0) || (result == 0xFFFFFFFFUL) )
{
flash_sz = FLASH_SIZE;
result = FLASH_SIZE;
}
}
flash_sz = result; // presumes atomic 32-bit read/write and static result
}
return flash_sz;
@@ -243,16 +246,16 @@ void read_block(uint32_t block_no, uint8_t *data) {
memset(data, 0, 512);
uint32_t sectionIdx = block_no;
if (block_no == 0) {
if (block_no == 0) { // Requested boot block
memcpy(data, &BootBlock, sizeof(BootBlock));
data[510] = 0x55;
data[511] = 0xaa;
// logval("data[0]", data[0]);
} else if (block_no < START_ROOTDIR) {
} else if (block_no < START_ROOTDIR) { // Requested FAT table sector
sectionIdx -= START_FAT0;
// logval("sidx", sectionIdx);
if (sectionIdx >= SECTORS_PER_FAT)
sectionIdx -= SECTORS_PER_FAT;
sectionIdx -= SECTORS_PER_FAT; // second FAT is same as the first...
if (sectionIdx == 0) {
data[0] = 0xf0;
// WARNING -- code presumes only one NULL .content for .UF2 file
@@ -262,7 +265,7 @@ void read_block(uint32_t block_no, uint8_t *data) {
data[i] = 0xff;
}
}
for (int i = 0; i < 256; ++i) {
for (int i = 0; i < 256; ++i) { // Generate the FAT chain for the firmware "file"
uint32_t v = sectionIdx * 256 + i;
if (UF2_FIRST_SECTOR <= v && v <= UF2_LAST_SECTOR)
((uint16_t *)(void *)data)[i] = v == UF2_LAST_SECTOR ? 0xffff : v + 1;