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squeeze the usb identification code

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This commit is contained in:
Dan Halbert 2022-09-20 20:08:16 -04:00
parent c567b43441
commit daf415d9c7
1 changed files with 13 additions and 6 deletions
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19
supervisor/shared/usb/usb.c
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@ -122,7 +122,9 @@ void usb_set_defaults(void) {
#endif
};
#if CIRCUITPY_USB_IDENTIFICATION
supervisor_allocation *usb_identification_allocation;
#endif
// Some dynamic USB data must be saved after boot.py. How much is needed?
size_t usb_boot_py_data_size(void) {
@ -137,16 +139,21 @@ size_t usb_boot_py_data_size(void) {
// Fill in the data to save.
void usb_get_boot_py_data(uint8_t *temp_storage, size_t temp_storage_size) {
#if CIRCUITPY_USB_IDENTIFICATION
if (usb_identification_allocation) {
memcpy(temp_storage, usb_identification_allocation->ptr, sizeof(usb_identification_t));
free_memory(usb_identification_allocation);
#else
if (false) {
// Nothing
#endif
} else {
usb_identification_t defaults = {
.vid = USB_VID,
.pid = USB_PID,
.manufacturer_name = USB_MANUFACTURER,
.product_name = USB_PRODUCT,
};
usb_identification_t defaults;
// This compiles to less code than using a struct initializer.
defaults.vid = USB_VID;
defaults.pid = USB_PID;
strcpy(defaults.manufacturer_name, USB_MANUFACTURER);
strcpy(defaults.product_name, USB_PRODUCT);
memcpy(temp_storage, &defaults, sizeof(defaults));
}