mirror of
https://github.com/espressif/esp-idf.git
synced 2024-09-20 00:36:01 -04:00
accbaee57c
This commit adds the preliminary version of the USB Host Library. This commit contains: - USBH (USB Host Driver) - Hub Driver that only supports a single device and device enumeration - USB Host Library (asychronous API) - Test cases for USB Host Library asychronous API The following changes were made to the existing HCD: - Removed HCD_PIPE_STATE_INVALID. Pipes are no longer invalidated - Changed pipe commands to halt, flush, and clear. Pipes need to be manually halted, flush, and cleared. - Halting and flushing a pipe will execute the pipe callback if it causes a HCD_PIPE_EVENT_URB_DONE event
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);
|
|
}
|