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usb: esp_modem biding 

This commit adds esp_modem_usb_dte component.
It can be used with esp_modem for communication with USB modems.
This commit is contained in:
Tomas Rezucha 2022-09-02 10:27:37 +02:00
parent b0b65cbdb9
commit fd9ecc13c1
14 changed files with 628 additions and 7 deletions
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9
.github/workflows/upload_component.yml vendored
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@ -15,6 +15,13 @@ jobs:
- name: Upload components to component service
uses: espressif/upload-components-ci-action@v1
with:
directories: "bdc_motor;cbor;jsmn;led_strip;libsodium;pid_ctrl;qrcode;nghttp;sh2lib;expat;esp_encrypted_img;coap;pcap;json_generator;json_parser;usb/usb_host_cdc_acm;usb/usb_host_msc;usb/usb_host_uvc;esp_serial_slave_link;esp_jpeg;eigen"
directories: >
"
bdc_motor;cbor;jsmn;led_strip;libsodium;pid_ctrl;qrcode;nghttp;sh2lib;expat;esp_encrypted_img;coap;pcap;json_generator;json_parser;esp_serial_slave_link;esp_jpeg;eigen;
usb/usb_host_cdc_acm;
usb/usb_host_msc;
usb/usb_host_uvc;
usb/esp_modem_usb_dte;
"
namespace: "espressif"
api_token: ${{ secrets.IDF_COMPONENT_API_TOKEN }}

12
.gitignore vendored
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@ -1,5 +1,7 @@
*/dist/**
build
sdkconfig
sdkconfig.old
dependencies.lock
**/dist/**
build
sdkconfig
sdkconfig.old
dependencies.lock
**/managed_components/**
.vscode/**

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usb/esp_modem_usb_dte/CMakeLists.txt Normal file
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@ -0,0 +1,6 @@
idf_component_register(SRCS "esp_modem_usb.cpp" "esp_modem_usb_api_target.cpp" "esp_modem_usb_c_api.cpp"
REQUIRED_IDF_TARGETS esp32s2 esp32s3
PRIV_INCLUDE_DIRS "private_include"
INCLUDE_DIRS "include")
set_target_properties(${COMPONENT_LIB} PROPERTIES CXX_STANDARD 17)

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usb/esp_modem_usb_dte/LICENSE Normal file
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usb/esp_modem_usb_dte/README.md Normal file
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@ -0,0 +1,34 @@
# USB DTE plugin for esp_modem
> :warning: **Experimental feature**: USB DTE is under development!
This component extends [esp_modem](https://components.espressif.com/component/espressif/esp_modem) with USB DTE.
## Examples
For example usage see esp_modem examples:
* [console example](https://github.com/espressif/esp-protocols/tree/master/components/esp_modem/examples/modem_console)
* [PPPoS example](https://github.com/espressif/esp-protocols/tree/master/components/esp_modem/examples/pppos_client)
## USB hotplugging and reconnection
USB DTE supports device reconnection and hot-plugging. You must only register callback function for `DEVICE_GONE` event and react accordingly:
C++ with lambda callback:
```cpp
auto dte = create_usb_dte(&dte_config);
dte->set_error_cb([&](terminal_error err) {
if (err == terminal_error::DEVICE_GONE) {
// Signal your application that USB modem device has been disconnected
}
});
```
C:
```c
static void usb_terminal_error_handler(esp_modem_terminal_error_t err) {
if (err == ESP_MODEM_TERMINAL_DEVICE_GONE) {
// Signal your application that USB modem device has been disconnected
}
}
esp_modem_dce_t *dce = esp_modem_new_dev_usb(ESP_MODEM_DCE_BG96, &dte_usb_config, &dce_config, esp_netif);
esp_modem_set_error_cb(dce, usb_terminal_error_handler);
```

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usb/esp_modem_usb_dte/esp_modem_usb.cpp Normal file
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/*
* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_log.h"
#include "esp_modem_config.h"
#include "esp_modem_usb_config.h"
#include "cxx_include/esp_modem_dte.hpp"
#include "cxx_include/esp_modem_exception.hpp"
#include "usb/usb_host.h"
#include "usb/cdc_acm_host.h"
#include "sdkconfig.h"
#include "usb_terminal.hpp"
static const char *TAG = "usb_terminal";
/**
* @brief USB Host task
*
* This task is created only if install_usb_host is set to true in DTE configuration.
* In case you don't want to install USB Host driver here, you must install it before creating UsbTerminal object.
*
* This implementation of USB Host Lib handling never returns, which means that the USB Host Lib will keep running
* even after all USB devices are disconnected. That allows repeated device reconnections.
*
* If you want/need to handle lifetime of USB Host Lib, you can set install_usb_host to false and manage it yourself.
*
* @param arg Unused
*/
static void usb_host_task(void *arg)
{
while (1) {
uint32_t event_flags;
usb_host_lib_handle_events(portMAX_DELAY, &event_flags);
if (event_flags & USB_HOST_LIB_EVENT_FLAGS_NO_CLIENTS) {
ESP_LOGD(TAG, "No more clients: clean up\n");
usb_host_device_free_all();
}
}
}
namespace esp_modem {
class UsbTerminal : public Terminal, private CdcAcmDevice {
public:
explicit UsbTerminal(const esp_modem_dte_config *config)
{
const struct esp_modem_usb_term_config *usb_config = (struct esp_modem_usb_term_config *)(config->extension_config);
// Install USB Host driver (if not already installed)
if (usb_config->install_usb_host && !usb_host_lib_task) {
const usb_host_config_t host_config = {
.skip_phy_setup = false,
.intr_flags = ESP_INTR_FLAG_LEVEL1,
};
ESP_MODEM_THROW_IF_ERROR(usb_host_install(&host_config), "USB Host install failed");
ESP_LOGD(TAG, "USB Host installed");
ESP_MODEM_THROW_IF_FALSE(
pdTRUE == xTaskCreatePinnedToCore(usb_host_task, "usb_host", 4096, NULL, config->task_priority + 1, &usb_host_lib_task, usb_config->xCoreID),
"USB host task failed");
}
// Install CDC-ACM driver
const cdc_acm_host_driver_config_t esp_modem_cdc_acm_driver_config = {
.driver_task_stack_size = config->task_stack_size,
.driver_task_priority = config->task_priority,
.xCoreID = (BaseType_t)usb_config->xCoreID,
.new_dev_cb = NULL, // We don't forward this information to user. User can poll USB Host Lib.
};
// Silently continue on error: CDC-ACM driver might be already installed
cdc_acm_host_install(&esp_modem_cdc_acm_driver_config);
// Open CDC-ACM device
const cdc_acm_host_device_config_t esp_modem_cdc_acm_device_config = {
.connection_timeout_ms = usb_config->timeout_ms,
.out_buffer_size = config->dte_buffer_size,
.event_cb = handle_notif,
.data_cb = handle_rx,
.user_arg = this
};
if (usb_config->cdc_compliant) {
ESP_MODEM_THROW_IF_ERROR(
this->CdcAcmDevice::open(usb_config->vid, usb_config->pid, usb_config->interface_idx, &esp_modem_cdc_acm_device_config),
"USB Device open failed");
} else {
ESP_MODEM_THROW_IF_ERROR(
this->CdcAcmDevice::open_vendor_specific(usb_config->vid, usb_config->pid, usb_config->interface_idx, &esp_modem_cdc_acm_device_config),
"USB Device open failed");
}
};
~UsbTerminal()
{
this->CdcAcmDevice::close();
};
void start() override
{
return;
}
void stop() override
{
return;
}
int write(uint8_t *data, size_t len) override
{
ESP_LOG_BUFFER_HEXDUMP(TAG, data, len, ESP_LOG_DEBUG);
if (this->CdcAcmDevice::tx_blocking(data, len) != ESP_OK) {
return -1;
}
return len;
}
int read(uint8_t *data, size_t len) override
{
// This function should never be called. UsbTerminal provides data through Terminal::on_read callback
ESP_LOGW(TAG, "Unexpected call to UsbTerminal::read function");
return -1;
}
private:
UsbTerminal() = delete;
UsbTerminal(const UsbTerminal &copy) = delete;
UsbTerminal &operator=(const UsbTerminal &copy) = delete;
bool operator== (const UsbTerminal &param) const = delete;
bool operator!= (const UsbTerminal &param) const = delete;
static TaskHandle_t usb_host_lib_task; // Reused by multiple devices or between reconnections
static void handle_rx(uint8_t *data, size_t data_len, void *user_arg)
{
ESP_LOG_BUFFER_HEXDUMP(TAG, data, data_len, ESP_LOG_DEBUG);
UsbTerminal *this_terminal = static_cast<UsbTerminal *>(user_arg);
if (data_len > 0 && this_terminal->on_read) {
this_terminal->on_read(data, data_len);
} else {
ESP_LOGD(TAG, "Unhandled RX data");
}
}
static void handle_notif(const cdc_acm_host_dev_event_data_t *event, void *user_ctx)
{
UsbTerminal *this_terminal = static_cast<UsbTerminal *>(user_ctx);
switch (event->type) {
// Notifications like Ring, Rx Carrier indication or Network connection indication are not relevant for USB terminal
case CDC_ACM_HOST_NETWORK_CONNECTION:
case CDC_ACM_HOST_SERIAL_STATE:
ESP_LOGD(TAG, "Ignored USB event %d", event->type);
break;
case CDC_ACM_HOST_DEVICE_DISCONNECTED:
ESP_LOGW(TAG, "USB terminal disconnected");
if (this_terminal->on_error) {
this_terminal->on_error(terminal_error::DEVICE_GONE);
}
this_terminal->close();
break;
case CDC_ACM_HOST_ERROR:
ESP_LOGE(TAG, "Unexpected CDC-ACM error: %d.", event->data.error);
if (this_terminal->on_error) {
this_terminal->on_error(terminal_error::UNEXPECTED_CONTROL_FLOW);
}
break;
default:
abort();
}
};
};
TaskHandle_t UsbTerminal::usb_host_lib_task = nullptr;
std::unique_ptr<Terminal> create_usb_terminal(const esp_modem_dte_config *config)
{
TRY_CATCH_RET_NULL(
return std::make_unique<UsbTerminal>(config);
)
}
} // namespace esp_modem

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usb/esp_modem_usb_dte/esp_modem_usb_api_target.cpp Normal file
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/*
* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "usb_terminal.hpp"
#include "cxx_include/esp_modem_api.hpp"
#ifdef CONFIG_COMPILER_CXX_EXCEPTIONS
static const char *TAG = "modem_usb_api_target";
#endif
namespace esp_modem {
std::shared_ptr<DTE> create_usb_dte(const dte_config *config)
{
TRY_CATCH_RET_NULL(
auto term = create_usb_terminal(config);
return std::make_shared<DTE>(config, std::move(term));
)
}
}

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usb/esp_modem_usb_dte/esp_modem_usb_c_api.cpp Normal file
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/*
* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "esp_modem_usb_c_api.h"
#include "cxx_include/esp_modem_usb_api.hpp"
#include "esp_private/c_api_wrapper.hpp"
using namespace esp_modem;
extern "C" esp_modem_dce_t *esp_modem_new_dev_usb(esp_modem_dce_device_t module, const esp_modem_dte_config_t *dte_config, const esp_modem_dce_config_t *dce_config, esp_netif_t *netif)
{
auto dce_wrap = new (std::nothrow) esp_modem_dce_wrap;
if (dce_wrap == nullptr) {
return nullptr;
}
auto dte = create_usb_dte(dte_config);
if (dte == nullptr) {
delete dce_wrap;
return nullptr;
}
dce_wrap->dte = dte;
dce_factory::Factory f(convert_modem_enum(module));
dce_wrap->dce = f.build(dce_config, std::move(dte), netif);
if (dce_wrap->dce == nullptr) {
delete dce_wrap;
return nullptr;
}
dce_wrap->modem_type = convert_modem_enum(module);
dce_wrap->dte_type = esp_modem_dce_wrap::modem_wrap_dte_type::USB;
return dce_wrap;
}

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usb/esp_modem_usb_dte/idf_component.yml Normal file
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## IDF Component Manager Manifest File
version: "1.0.0"
description: USB DTE plugin for esp_modem component
url: https://github.com/espressif/idf-extra-components/tree/master/usb/esp_modem_usb_dte
dependencies:
idf: ">=4.4"
usb_host_cdc_acm: "1.*"
esp_modem: "^0.1.23"

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usb/esp_modem_usb_dte/include/cxx_include/esp_modem_usb_api.hpp Normal file
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/*
* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include "cxx_include/esp_modem_api.hpp"
namespace esp_modem {
/**
* @brief Create USB DTE
*
* @param config DTE configuration
* @return shared ptr to DTE on success
* nullptr on failure (either due to insufficient memory or wrong dte configuration)
* if exceptions are disabled the API abort()'s on error
*/
std::shared_ptr<DTE> create_usb_dte(const dte_config *config);
}

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usb/esp_modem_usb_dte/include/esp_modem_usb_c_api.h Normal file
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/*
* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include "esp_modem_c_api_types.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Create a DCE handle using the supplied USB DTE
*
* @param module Specific device for creating this DCE
* @param dte_config DTE - USB configuration
* @param dce_config DCE configuration
* @param netif Network interface handle for the data mode
*
* @return DCE pointer on success, NULL on failure
*/
esp_modem_dce_t *esp_modem_new_dev_usb(esp_modem_dce_device_t module, const esp_modem_dte_config_t *dte_config, const esp_modem_dce_config_t *dce_config, esp_netif_t *netif);
#ifdef __cplusplus
}
#endif

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usb/esp_modem_usb_dte/include/esp_modem_usb_config.h Normal file
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/*
* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include <stdint.h>
#include <stdbool.h>
/**
* @brief USB configuration structure
* @see USB host CDC-ACM driver documentation for details about interfaces settings
*/
struct esp_modem_usb_term_config {
uint16_t vid; /*!< Vendor ID of the USB device */
uint16_t pid; /*!< Product ID of the USB device */
int interface_idx; /*!< USB Interface index that will be used */
uint32_t timeout_ms; /*!< Time for a USB modem to connect to USB host. 0 means wait forever. */
int xCoreID; /*!< Core affinity of created tasks: CDC-ACM driver task and optional USB Host task */
bool cdc_compliant; /*!< Treat the USB device as CDC-compliant. Read CDC-ACM driver documentation for more details */
bool install_usb_host; /*!< Flag whether USB Host driver should be installed */
};
/**
* @brief ESP Mode USB DTE Default Configuration
*
* @param[in] _usb_config esp_modem_usb_term_config configuration structure. Can be obtained by ESP_MODEM_DEFAULT_USB_CONFIG
*
*/
#define ESP_MODEM_DTE_DEFAULT_USB_CONFIG(_usb_config) \
{ \
.dte_buffer_size = 512, \
.task_stack_size = 4096, \
.task_priority = 5, \
.extension_config = &_usb_config \
}
/**
* @brief ESP Modem USB Default Configuration
*
* @param[in] _vid USB Vendor ID
* @param[in] _pid USB Product ID
* @param[in] _intf USB interface number
* @see USB host CDC-ACM driver documentation for details about interfaces settings
*/
#define ESP_MODEM_DEFAULT_USB_CONFIG(_vid, _pid, _intf) \
{ \
.vid = _vid, \
.pid = _pid, \
.interface_idx = _intf, \
.timeout_ms = 0, \
.xCoreID = 0, \
.cdc_compliant = false, \
.install_usb_host = true \
}

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usb/esp_modem_usb_dte/private_include/usb_terminal.hpp Normal file
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/*
* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include "cxx_include/esp_modem_dte.hpp"
#include "../private_include/exception_stub.hpp"
struct esp_modem_dte_config;
namespace esp_modem {
std::unique_ptr<Terminal> create_usb_terminal(const esp_modem_dte_config *config);
} // namespace esp_modem

4
usb/test_app/CMakeLists.txt
View File

@ -4,7 +4,9 @@ cmake_minimum_required(VERSION 3.16)
set(EXTRA_COMPONENT_DIRS ../usb_host_cdc_acm
../usb_host_msc
../usb_host_uvc)
../usb_host_uvc
../esp_modem_usb_dte
)
# Set the components to include the tests for.
set(TEST_COMPONENTS "usb_host_cdc_acm" "usb_host_msc" "usb_host_uvc" CACHE STRING "List of components to test")