mirror of
https://github.com/openmv/openmv.git
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136 lines
4.6 KiB
C
136 lines
4.6 KiB
C
/*
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* SPDX-License-Identifier: MIT
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*
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* Copyright (C) 2022-2024 OpenMV, LLC.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* OpenMV Protocol USB Channel.
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*/
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#if OMV_USB_STACK_STMUSB
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#include "py/stream.h"
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#include "py/mphal.h"
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#include "py/ringbuf.h"
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#include "py/runtime.h"
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#include "omv_common.h"
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#include "cmsis_gcc.h"
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#include "omv_protocol.h"
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#include "omv_boardconfig.h"
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#undef MIN
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#undef MAX
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#include "usbd_cdc_msc_hid.h"
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#include "usbd_cdc_interface.h"
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#ifndef OMV_PROTOCOL_USB_CHANNEL_TIMEOUT_MS
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#define OMV_PROTOCOL_USB_CHANNEL_TIMEOUT_MS (1500)
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#endif
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static bool usb_channel_active = false;
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static size_t usb_channel_size(const omv_protocol_channel_t *channel) {
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usbd_cdc_itf_t *cdc = usb_vcp_get(0);
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return usbd_cdc_rx_num(cdc);
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}
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static bool usb_channel_is_active(const omv_protocol_channel_t *channel) {
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return usb_channel_active;
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}
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static int usb_channel_read(const omv_protocol_channel_t *channel, uint32_t offset, size_t size, void *data) {
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usbd_cdc_itf_t *cdc = usb_vcp_get(0);
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return usbd_cdc_rx(cdc, data, size, OMV_PROTOCOL_USB_CHANNEL_TIMEOUT_MS);
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}
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static int usb_channel_write(const omv_protocol_channel_t *channel, uint32_t offset, size_t size, const void *data) {
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usbd_cdc_itf_t *cdc = usb_vcp_get(0);
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return usbd_cdc_tx(cdc, data, size, OMV_PROTOCOL_USB_CHANNEL_TIMEOUT_MS);
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}
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static void usb_channel_task(mp_sched_node_t *node) {
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if (usb_channel_active) {
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omv_protocol_task();
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}
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}
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int __real_mp_os_dupterm_rx_chr(void);
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int __wrap_mp_os_dupterm_rx_chr(void) {
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if (usb_channel_active) {
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return -1;
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}
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return __real_mp_os_dupterm_rx_chr();
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}
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int8_t __real_usbd_cdc_receive(usbd_cdc_state_t *cdc_in, size_t len);
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int8_t __wrap_usbd_cdc_receive(usbd_cdc_state_t *cdc_in, size_t len) {
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static mp_sched_node_t usb_channel_node;
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// Ensure the CDC is detached from REPL, if the protocol is active,
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// before calling receive as it raises exceptions on interrupt chars.
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usbd_cdc_itf_t *cdc = usb_vcp_get(0);
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if (usb_channel_active && cdc->attached_to_repl) {
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cdc->attached_to_repl = false;
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cdc->flow |= USBD_CDC_FLOWCONTROL_RTS | USBD_CDC_FLOWCONTROL_CTS;
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}
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int8_t ret = __real_usbd_cdc_receive(cdc_in, len);
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if (usb_channel_active) {
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mp_sched_schedule_node(&usb_channel_node, usb_channel_task);
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}
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return ret;
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}
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int8_t __real_usbd_cdc_control(usbd_cdc_state_t *cdc_in, uint8_t cmd, uint8_t *pbuf, uint16_t length);
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int8_t __wrap_usbd_cdc_control(usbd_cdc_state_t *cdc_in, uint8_t cmd, uint8_t *pbuf, uint16_t length) {
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usbd_cdc_itf_t *cdc = usb_vcp_get(0);
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int8_t ret = __real_usbd_cdc_control(cdc_in, cmd, pbuf, length);
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if (cdc->bitrate != OMV_PROTOCOL_MAGIC_BAUDRATE ||
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cdc->connect_state == USBD_CDC_CONNECT_STATE_DISCONNECTED) {
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// Reattach to REPL
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cdc->rx_buf_put = 0;
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cdc->rx_buf_get = 0;
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cdc->rx_buf_full = false;
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cdc->tx_need_empty_packet = 0;
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cdc->attached_to_repl = true;
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cdc->flow &= ~USBD_CDC_FLOWCONTROL_CTS;
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} else if (cdc->bitrate == OMV_PROTOCOL_MAGIC_BAUDRATE) {
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// Detach from REPL
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cdc->attached_to_repl = false;
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cdc->flow |= USBD_CDC_FLOWCONTROL_RTS | USBD_CDC_FLOWCONTROL_CTS;
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}
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usb_channel_active = !cdc->attached_to_repl;
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return ret;
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}
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// USB Channel
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const omv_protocol_channel_t omv_usb_channel = {
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.priv = NULL,
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.id = OMV_PROTOCOL_CHANNEL_ID_TRANSPORT,
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.name = "usb",
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.flags = OMV_PROTOCOL_CHANNEL_FLAG_PHYSICAL,
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.size = usb_channel_size,
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.read = usb_channel_read,
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.write = usb_channel_write,
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.is_active = usb_channel_is_active
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};
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#endif // OMV_USB_STACK_STM
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