STATIC mp_obj_t time_sleep_us (mp_obj_t usec_in) {
mp_int_t usec = mp_obj_get_int(usec_in);
if (usec > 0) {
UtilsDelay(UTILS_DELAY_US_TO_COUNT(usec));
}
return mp_const_none;
}
//*****************************************************************************
//! Wait while the safe mode pin is being held high and blink the system led
//! with the specified period
//*****************************************************************************
static bool wait_while_blinking (uint32_t wait_time, uint32_t period, bool force_wait) {
_u32 count;
for (count = 0; (force_wait || MAP_GPIOPinRead(MICROPY_SAFE_BOOT_PORT, MICROPY_SAFE_BOOT_PORT_PIN)) &&
((period * count) < wait_time); count++) {
// toogle the led
MAP_GPIOPinWrite(MICROPY_SYS_LED_PORT, MICROPY_SYS_LED_PORT_PIN, ~MAP_GPIOPinRead(MICROPY_SYS_LED_PORT, MICROPY_SYS_LED_PORT_PIN));
UtilsDelay(UTILS_DELAY_US_TO_COUNT(period * 1000));
}
return MAP_GPIOPinRead(MICROPY_SAFE_BOOT_PORT, MICROPY_SAFE_BOOT_PORT_PIN) ? true : false;
}
//*****************************************************************************
//! Check for the safe mode pin
//*****************************************************************************
static bool safe_mode_boot (void) {
_u32 count = 0;
while (MAP_GPIOPinRead(MICROPY_SAFE_BOOT_PORT, MICROPY_SAFE_BOOT_PORT_PIN) &&
((BOOTMGR_WAIT_SAFE_MODE_TOOGLE_MS * count++) < BOOTMGR_WAIT_SAFE_MODE_MS)) {
// toogle the led
MAP_GPIOPinWrite(MICROPY_SYS_LED_PORT, MICROPY_SYS_LED_PORT_PIN, ~MAP_GPIOPinRead(MICROPY_SYS_LED_PORT, MICROPY_SYS_LED_PORT_PIN));
UtilsDelay(UTILS_DELAY_US_TO_COUNT(BOOTMGR_WAIT_SAFE_MODE_TOOGLE_MS * 1000));
}
mperror_deinit_sfe_pin();
return MAP_GPIOPinRead(MICROPY_SAFE_BOOT_PORT, MICROPY_SAFE_BOOT_PORT_PIN) ? true : false;
}
//*****************************************************************************
//! Load the proper image based on information from boot info and executes it.
//*****************************************************************************
static void bootmgr_image_loader(sBootInfo_t *psBootInfo) {
_i32 fhandle;
if (safe_mode_boot()) {
_u32 count = 0;
while ((BOOTMGR_SAFE_MODE_ENTER_TOOGLE_MS * count++) < BOOTMGR_SAFE_MODE_ENTER_MS) {
// toogle the led
MAP_GPIOPinWrite(MICROPY_SYS_LED_PORT, MICROPY_SYS_LED_PORT_PIN, ~MAP_GPIOPinRead(MICROPY_SYS_LED_PORT, MICROPY_SYS_LED_PORT_PIN));
UtilsDelay(UTILS_DELAY_US_TO_COUNT(BOOTMGR_SAFE_MODE_ENTER_TOOGLE_MS * 1000));
}
psBootInfo->ActiveImg = IMG_ACT_FACTORY;
// turn the led off
MAP_GPIOPinWrite(MICROPY_SYS_LED_PORT, MICROPY_SYS_LED_PORT_PIN, 0);
// request a safe boot to the application
PRCMRequestSafeBoot();
}
// do we have a new update image that needs to be verified?
else if ((psBootInfo->ActiveImg == IMG_ACT_UPDATE) && (psBootInfo->Status == IMG_STATUS_CHECK)) {
if (!bootmgr_verify()) {
// delete the corrupted file
sl_FsDel((_u8 *)IMG_UPDATE, 0);
// switch to the factory image
psBootInfo->ActiveImg = IMG_ACT_FACTORY;
}
// in any case, set the status as "READY"
psBootInfo->Status = IMG_STATUS_READY;
// write the new boot info
if (!sl_FsOpen((unsigned char *)IMG_BOOT_INFO, FS_MODE_OPEN_WRITE, NULL, &fhandle)) {
sl_FsWrite(fhandle, 0, (unsigned char *)psBootInfo, sizeof(sBootInfo_t));
// close the file
sl_FsClose(fhandle, 0, 0, 0);
}
}
// now boot the active image
if (IMG_ACT_UPDATE == psBootInfo->ActiveImg) {
bootmgr_load_and_execute((unsigned char *)IMG_UPDATE);
}
else {
bootmgr_load_and_execute((unsigned char *)IMG_FACTORY);
}
}
static bool safe_boot_request_start (uint32_t wait_time) {
if (MAP_GPIOPinRead(MICROPY_SAFE_BOOT_PORT, MICROPY_SAFE_BOOT_PORT_PIN)) {
UtilsDelay(UTILS_DELAY_US_TO_COUNT(wait_time * 1000));
}
return MAP_GPIOPinRead(MICROPY_SAFE_BOOT_PORT, MICROPY_SAFE_BOOT_PORT_PIN) ? true : false;
}