mirror of
https://github.com/espressif/esp-idf.git
synced 2025-11-04 09:01:40 +01:00
39 lines
1.3 KiB
C
39 lines
1.3 KiB
C
|
/*
|
||
|
|
* SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: Apache-2.0
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "esp_heap_caps.h"
|
||
|
|
#include "usb_private.h"
|
||
|
|
#include "usb/usb_types_ch9.h"
|
||
|
|
|
||
|
|
urb_t *urb_alloc(size_t data_buffer_size, size_t header_size, int num_isoc_packets)
|
||
|
|
{
|
||
|
|
urb_t *urb = heap_caps_calloc(1, sizeof(urb_t) + (sizeof(usb_isoc_packet_desc_t) * num_isoc_packets), MALLOC_CAP_DEFAULT);
|
||
|
|
uint8_t *data_buffer = heap_caps_malloc(data_buffer_size + header_size, MALLOC_CAP_DMA);
|
||
|
|
if (urb == NULL || data_buffer == NULL) {
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
urb->usb_host_header_size = header_size; //Indicate that this URB's data_buffer has a header in front of it.
|
||
|
|
//Case as dummy transfer to write to initialize const fields
|
||
|
|
usb_transfer_dummy_t *dummy_transfer = (usb_transfer_dummy_t *)&urb->transfer;
|
||
|
|
dummy_transfer->data_buffer = (uint8_t *)(data_buffer + header_size);
|
||
|
|
dummy_transfer->data_buffer_size = data_buffer_size;
|
||
|
|
dummy_transfer->num_isoc_packets = num_isoc_packets;
|
||
|
|
return urb;
|
||
|
|
err:
|
||
|
|
heap_caps_free(urb);
|
||
|
|
heap_caps_free(data_buffer);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
void urb_free(urb_t *urb)
|
||
|
|
{
|
||
|
|
if (urb == NULL) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
heap_caps_free((uint8_t *)(urb->transfer.data_buffer - urb->usb_host_header_size));
|
||
|
|
heap_caps_free(urb);
|
||
|
|
}
|