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基于 BL702 开发指南
=========================

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基于 CH32V307 开发指南
=========================

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# RT-Thread based Software Package Development Guide
[中文版](rt-thread_zh.md)
To use CherryUSB package, you need to select it in the RT-Thread package manager. The specific path is as follows:
```
-> RT-Thread online packages
-> system packages
--- CherryUSB: tiny and portable USB stack for embedded system with USB IP
CherryUSB Options ---->
USB Speed (FS) --->
[*] Enable usb device mode
[*] Enable usb cdc acm device
[ ] Enable usb hid device
[ ] Enable usb dfu device
[ ] Enable usb msc device
[ ] Enable usb hub device
[ ] Enable usb audio device
[ ] Enable usb video device
Version (latest) --->
```
## Based ON STM32 Platform
Please note that stm32 series have two usb ip. For usb ip, like stm32f0、stm32f1、stm32f3, for usb otg ip(as we know it is from **synopsys**),like stm32f4、stm32f7 and so on.
### Use USB Device
- Firstly,you should have a bsp project,and then go to `board\CubeMX_Config` directory, open file that suffix name with `.ioc` in **STM32CubeMX**.
- Enable **USB** or **USB_OTG_FS** or **USB_OTG_HS** in **Connectivity** List,enable USB IRQ in **NVIC Setting**.
![STM32CubeMX USB setting](img/stm32cubemx.png)
- Enable USB Clock for 48Mhz in **Clock configuration**.
![STM32CubeMX USB clock](img/stm32cubemx_clk.png)
- Generate code.
- Copy **SystemClock_Config** into **board.c**.
- ~~Copy **MX_USB_OTG_FS_PCD_Init** or **MX_USB_OTG_HS_PCD_Init** into **main.c** if you use **usb_dc_hal.c**.Also, USB Irq from **it.c** needs the same.~~
- Implement **usb_dc_low_level_init** and copy codes in from ``HAL_PCD_MspInit``.
```
void usb_dc_low_level_init(void)
{
/* Peripheral clock enable */
__HAL_RCC_USB_CLK_ENABLE();
/* USB interrupt Init */
HAL_NVIC_SetPriority(USB_LP_CAN1_RX0_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USB_LP_CAN1_RX0_IRQn);
}
```
- Implement **printf** or modify with **rt_kprintf** in **usb_utils.h**, usb stack needs.
- Now we can call some functions provided by **usb_stack**.Your should register descriptors、interfaces and endpoint callback firstly, and then call `usb_dc_init`. Example is as follows:
```
int main(void)
{
extern void cdc_init(void);
cdc_init();
usb_dc_init();
while (1)
{
uint8_t data_buffer[10] = { 0x31, 0x32, 0x33, 0x34, 0x35, 0x31, 0x32, 0x33, 0x34, 0x35 };
usbd_ep_write(0x81, data_buffer, 10, NULL);
rt_thread_mdelay(500);
}
}
```
- How to register class you can go to [stm32 class examples](https://github.com/sakumisu/usb_stack/tree/master/demo/stm32/stm32f103c8t6/example) for a reference.
### CDC Demo Demonstration
![CDC Demo](img/rtt_cdc_demo.png)
### Video manual
If you have problem from steps above, you can see this video[Use USB Stack in RT-Thread package manager](https://www.bilibili.com/video/BV1Ef4y1t73d?p=26)。

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# 基于 RT-Thread 软件包开发指南
[English Version](rt-thread.md)
使用 CherryUSB package 需要在 RT-Thread 的包管理器中选择它,具体路径如下:
```
-> RT-Thread online packages
-> system packages
--- CherryUSB: tiny and portable USB stack for embedded system with USB IP
CherryUSB Options ---->
USB Speed (FS) --->
[*] Enable usb device mode
[ ] Enable usb host mode
[*] Enable usb cdc acm device
[ ] Enable usb hid device
[ ] Enable usb dfu device
[ ] Enable usb msc device
[ ] Enable usb hub device
[ ] Enable usb audio device
[ ] Enable usb video device
Version (latest) --->
```
## 基于 STM32 平台
STM32 系列单片机有两种 USB IP,分别是 USB IP 和 USB OTG IP。其中 USB IP例如 STM32F0、STM32F1、STM32F3等等USB OTG IP(我们都知道用的是 **synopsys** 公司的)的有 STM32F4、STM32F7、STM32H7等等。当前如果你需要使用 USB Device 功能porting 接口提供了两种,一种是适配 USB IP的 **fsdev**,另一种是适配 USB OTG IP 的 **synopsys**
### 使用 USB Device 功能
- 首先,你需要有一个 bsp 工程,之后进入到 `board\CubeMX_Config` 目录下,使用 **STM32CubeMX** 打开后缀名为 `.ioc` 的文件。
- 进入 **Connectivity** 选项,选择 **USB** 或者 **USB_OTG_FS** 或者 **USB_OTG_HS**,并使能 device 功能,在 **NVIC Setting** 中开启 USB 中断。
![STM32CubeMX USB setting](img/stm32cubemx.png)
-**Clock configuration** 栏配置 USB 时钟为 48Mhz.
![STM32CubeMX USB clock](img/stm32cubemx_clk.png)
- 点击 **Generate code**
- 复制 **SystemClock_Config** 函数内容到 **board.c** 中。
- 实现 ``usb_dc_low_level_init``,并将 ``HAL_PCD_MspInit`` 里面内容复制进来,例如:
```
void usb_dc_low_level_init(void)
{
/* Peripheral clock enable */
__HAL_RCC_USB_CLK_ENABLE();
/* USB interrupt Init */
HAL_NVIC_SetPriority(USB_LP_CAN1_RX0_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USB_LP_CAN1_RX0_IRQn);
}
```
- 由于协议栈默认使用 `printf``malloc``free`,所以需要开启 libc 支持或者自己实现。
![libc](img/rtt_libc.png)
- 使用 **menuconfig** 配置 **CherryUSB** 软件包,使能 usb device 并勾选需要的 device class。
![usb host](img/rtt_menuconfig1.png)
- 现在我们可以调用 CherryUSB 中的函数来注册描述符、接口、端点中断,并调用 `usb_dc_init`,示例如下:
```
#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>
#include <stdio.h>
extern void usb_dc_init(void);
int main(void)
{
extern void cdc_init(void);
cdc_init();
usb_dc_init();
while (1)
{
uint8_t data_buffer[10] = { 0x31, 0x32, 0x33, 0x34, 0x35, 0x31, 0x32, 0x33, 0x34, 0x35 };
usbd_ep_write(0x81, data_buffer, 10, NULL);
rt_thread_mdelay(500);
}
}
```
- 关于如何注册 class 类可以参考 [stm32 class examples](https://github.com/sakumisu/usb_stack/tree/master/demo/stm32/stm32f103c8t6/example)。
### 使用 USB Host 功能
- 首先,你需要有一个 bsp 工程,之后进入到 `board\CubeMX_Config` 目录下,使用 **STM32CubeMX** 打开后缀名为 `.ioc` 的文件。
- 进入 **Connectivity** 选项,选择 **USB_OTG_FS** 或者 **USB_OTG_HS**,并使能 **host only** 功能,在 **NVIC Setting** 中开启 OTG GLOBAL 中断,其余两个端点中断不需要。
![STM32CubeMX USB setting](img/stm32cubemx2.png)
-**Clock configuration** 栏配置 USB 时钟为 48Mhz.
- 点击 **Generate code**
- 复制 **SystemClock_Config** 函数内容到 **board.c** 中。
- 修改 **usb_hc_synopsys.c** 中 HAL 库头文件包含,例如 `#include "stm32f4xx_hal.h"`
- 手动增加 **xxx_hal_hcd.c****xxx_ll_usb.c** 文件
- 由于协议栈默认使用 `printf``malloc``free`,所以需要开启 libc 支持或者自己实现。
![libc](img/rtt_libc.png)
- 使用 **menuconfig** 配置 **CherryUSB** 软件包,使能 usb host默认加载所有支持的 class
![usb host](img/rtt_menuconfig2.png)
- `main.c` 中调用 `usbh_initialize` 初始化 host 协议栈。
```
#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>
#include "usbh_core.h"
/* defined the LED0 pin: PH10 */
#define LED0_PIN GET_PIN(H, 10)
int main(void)
{
/* set LED0 pin mode to output */
rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
usbh_initialize();
while (1)
{
rt_pin_write(LED0_PIN, PIN_HIGH);
rt_thread_mdelay(500);
rt_pin_write(LED0_PIN, PIN_LOW);
rt_thread_mdelay(500);
}
}
```
### Demo 演示
- cdc acm device demo
![CDC Device Demo](img/rtt_cdc_demo.png)
- host demo
![USB Host Demo1](img/1.png)
![USB Host Demo2](img/2.png)
![USB Host Demo3](img/3.png)
### 视频教程
如果对上述步骤还有问题,可以参考 [协议栈在 RT-Thread 包管理器中的使用](https://www.bilibili.com/video/BV1Ef4y1t73d?p=26)。

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基于 STM32F429 开发指南
=========================