coldcard/firmware
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix for blank/3dots screen crash

Browse Source
This commit is contained in:
Peter D. Gray 2025-01-15 09:47:10 -05:00
parent 6b73eb2fa6
commit f2a3667593
No known key found for this signature in database
GPG Key ID: A2DCD558C2BE5D7C
1 changed files with 9 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
stm32/COLDCARD_MK4/psramdisk.c
View File

@ -501,31 +501,31 @@ static void psram_init_vfs(fs_user_mount_t *vfs, bool readonly) {
// psram_memset4()
//
static inline void
psram_memset4(void *dest_addr, uint32_t value, uint32_t byte_len)
static void
psram_memset4(void *dest_addr, uint32_t byte_len)
{
// Fast, aligned, and bug-fixing memset
// - PSRAM can starve the internal bus with too many writes, too fast
// - leads to a weird crash where SRAM bus (at least) is locked up, but flash works
// - and/or just call w/ interrupts off for reliable non-crashing behaviour
uint32_t *dest = (uint32_t *)dest_addr;
for(; byte_len; byte_len-=4, dest++) {
*dest = value;
asm("nop; nop; nop;"); // tested value, do not reduce
asm("nop; nop; nop;"); // more margin
asm("nop; nop; nop;"); // more margin
asm("nop; nop; nop;"); // more margin
*dest = 0x12345678;
}
}
// mp_obj_t psram_wipe_and_setup()
//
mp_obj_t psram_wipe_and_setup(mp_obj_t unused_self)
{
// Erase and reformat filesystem
// - you probably should unmount it, before calling this
// Wipe contents for security.
psram_memset4(PSRAM_TOP_BASE, 0x12345678, BLOCK_SIZE * BLOCK_COUNT);
mp_uint_t before = disable_irq();
psram_memset4(PSRAM_TOP_BASE, BLOCK_SIZE * BLOCK_COUNT);
enable_irq(before);
// Build obj to handle blockdev protocol
fs_user_mount_t vfs = {0};