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stm32/mboot: Don't search for firmware on FS, just attempt to open it.

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There's no need to do a directory listing to search for the given firmware
filename, it just takes extra time and code size.  Instead this commit
changes it so that the requested firmware file is opened immediately and
will abort if the file couldn't be opened.  This also allows to specify
files in a directory.

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George 2020-06-23 16:16:21 +10:00
parent 717b5073aa
commit 763bd448a4
1 changed files with 13 additions and 30 deletions
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37
ports/stm32/mboot/fsload.c
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@ -204,7 +204,7 @@ static int fsload_program_file(FATFS *fatfs, const char *filename, bool write_to
return 0;
}
static int fsload_process_fatfs(uint32_t base_addr, uint32_t byte_len, size_t fname_len, const char *fname) {
static int fsload_process_fatfs(uint32_t base_addr, uint32_t byte_len, const char *fname) {
fsload_bdev_t bdev = {base_addr, byte_len};
FATFS fatfs;
fatfs.drv = &bdev;
@ -213,34 +213,14 @@ static int fsload_process_fatfs(uint32_t base_addr, uint32_t byte_len, size_t fn
return -1;
}
FF_DIR dp;
res = f_opendir(&fatfs, &dp, "/");
if (res != FR_OK) {
return -1;
}
// Search for firmware file with correct name
int r;
for (;;) {
FILINFO fno;
res = f_readdir(&dp, &fno);
char *fn = fno.fname;
if (res != FR_OK || fn[0] == 0) {
// Finished listing dir, no firmware found
r = -1;
break;
}
if (memcmp(fn, fname, fname_len) == 0 && fn[fname_len] == '\0') {
// Found firmware
// Validate firmware
led_state_all(2);
r = fsload_program_file(&fatfs, fn, false);
int r = fsload_program_file(&fatfs, fname, false);
if (r == 0) {
// Firmware is valid, program it
led_state_all(4);
r = fsload_program_file(&fatfs, fn, true);
}
break;
}
r = fsload_program_file(&fatfs, fname, true);
}
return r;
@ -252,9 +232,12 @@ int fsload_process(void) {
return -1;
}
// Get mount point id and create null-terminated filename
uint8_t mount_point = elem[0];
uint8_t fname_len = elem[-1] - 1;
const char *fname = (const char*)&elem[1];
char fname[256];
memcpy(fname, &elem[1], fname_len);
fname[fname_len] = '\0';
elem = ELEM_DATA_START;
for (;;) {
@ -267,7 +250,7 @@ int fsload_process(void) {
uint32_t base_addr = get_le32(&elem[2]);
uint32_t byte_len = get_le32(&elem[6]);
if (elem[1] == ELEM_MOUNT_FAT) {
int ret = fsload_process_fatfs(base_addr, byte_len, fname_len, fname);
int ret = fsload_process_fatfs(base_addr, byte_len, fname);
// Flash LEDs based on success/failure of update
for (int i = 0; i < 4; ++i) {
if (ret == 0) {