分享stm32f042f6p6 USB HID改BULK传输程序

2019-12-10 18:31发布

本帖最后由 mii 于 2018-1-6 10:48 编辑

近期项目有用STM32F042F6P6做了简单的控制，后来需要扩展功能。随带做了USB的功能测试。

晶振使用外置的8M，当然可以使用内部48MRC。其他就是直接USB连接，做回环测试。

好了，废话不说，先上程序

HIDTOBULK.rar (5.1 MB, 下载次数: 59) 2018-1-5 14:32 上传点击文件名下载附件

下面开始修改
1.首先使用STM32CubeMX生成可用的HID程序。看图配置

2.png (20.88 KB, 下载次数: 0) 下载附件 2018-1-5 14:49 上传

5.打开usbd_hid.c，修改配置，接口，端口等描述符，直接上代码

其中描述符的长度要修改一下，就是其中的 USB_HID_CONFIG_DESC_SIZ = 36;

/* USB HID device Configuration Descriptor */
__ALIGN_BEGIN static uint8_t USBD_HID_CfgDesc[USB_HID_CONFIG_DESC_SIZ] __ALIGN_END =
{
0x09, /* bLength: Configuration Descriptor size */
USB_DESC_TYPE_CONFIGURATION, /* bDescriptorType: Configuration */
USB_HID_CONFIG_DESC_SIZ,
/* wTotalLength: Bytes returned */
0x00,
0x01, /*bNumInterfaces: 1 interface*/
0x01, /*bConfigurationValue: Configuration value*/
0x00, /*iConfiguration: Index of string descriptor describing
the configuration*/
0xE0, /*bmAttributes: bus powered and Support Remote Wake-up */
0x32, /*MaxPower 100 mA: this current is used for detecting Vbus*/
/************** Descriptor of Joystick Mouse interface ****************/
/* 09 */
0x09, /*bLength: Interface Descriptor size*/
USB_DESC_TYPE_INTERFACE,/*bDescriptorType: Interface descriptor type*/
0x00, /*bInterfaceNumber: Number of Interface*/
0x00, /*bAlternateSetting: Alternate setting*/
0x02, /*bNumEndpoints*/
0x00, /*bInterfaceClass: HID*/
0x00, /*bInterfaceSubClass : 1=BOOT, 0=no boot*/
0x00, /*nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse*/
0, /*iInterface: Index of string descriptor*/
// /******************** Descriptor of Joystick Mouse HID ********************/
// /* 18 */
// 0x09, /*bLength: HID Descriptor size*/
// HID_DESCRIPTOR_TYPE, /*bDescriptorType: HID*/
// 0x11, /*bcdHID: HID Class Spec release number*/
// 0x01,
// 0x00, /*bCountryCode: Hardware target country*/
// 0x01, /*bNumDescriptors: Number of HID class descriptors to follow*/
// 0x22, /*bDescriptorType*/
// HID_MOUSE_REPORT_DESC_SIZE,/*wItemLength: Total length of Report descriptor*/
// 0x00,
/******************** Descriptor of Mouse endpoint ********************/
/* 18 */
0x07, /*bLength: Endpoint Descriptor size*/
USB_DESC_TYPE_ENDPOINT, /*bDescriptorType:*/
HID_IN_EP, /*bEndpointAddress: Endpoint Address (IN)*/
0x02, /*bmAttributes: bulk endpoint*/
HID_IN_BULK_PACKET, /*wMaxPacketSize: 64 Byte max */
0x00,
HID_FS_BINTERVAL, /*bInterval: Polling Interval (10 ms)*/
/* 25 */
0x07, /*bLength: Endpoint Descriptor size*/
USB_DESC_TYPE_ENDPOINT, /*bDescriptorType:*/
HID_OUT_EP, /*bEndpointAddress: Endpoint Address (OUT)*/
0x02, /*bmAttributes: bulk endpoint*/
HID_OUT_BULK_PACKET, /*wMaxPacketSize: 64 Byte max */
0x00,
HID_FS_BINTERVAL, /*bInterval: Polling Interval (10 ms)*/
/* 32 */
} ;

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6.初始化端点与接收缓冲，USB_Rx_Buffer为自己定义接收缓冲区大小为64个字节

/**
* @brief USBD_HID_Init
* Initialize the HID interface
* @param pdev: device instance
* @param cfgidx: Configuration index
* @retval status
*/
static uint8_t USBD_HID_Init (USBD_HandleTypeDef *pdev,
uint8_t cfgidx)
{
uint8_t ret = 0;
/* Open EP IN */
USBD_LL_OpenEP(pdev,
HID_IN_EP,
USBD_EP_TYPE_BULK,
HID_IN_BULK_PACKET);
/* Open EP OUT */
USBD_LL_OpenEP(pdev,
HID_OUT_EP,
USBD_EP_TYPE_BULK,
HID_OUT_BULK_PACKET);
/* Prepare Out endpoint to receive next packet */
USBD_LL_PrepareReceive(pdev,
HID_OUT_EP,
(uint8_t*)(USB_Rx_Buffer),
HID_OUT_BULK_PACKET);
pdev->pClassData = USBD_malloc(sizeof (USBD_HID_HandleTypeDef));
if(pdev->pClassData == NULL)
{
ret = 1;
}
else
{
((USBD_HID_HandleTypeDef *)pdev->pClassData)->state = HID_IDLE;
}
return ret;
}

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7.同时也设置一下重置函数

/**
* @brief USBD_HID_Init
* DeInitialize the HID layer
* @param pdev: device instance
* @param cfgidx: Configuration index
* @retval status
*/
static uint8_t USBD_HID_DeInit (USBD_HandleTypeDef *pdev,
uint8_t cfgidx)
{
/* Close HID EPs */
USBD_LL_CloseEP(pdev,
HID_IN_EP);
/* Close HID EPs */
USBD_LL_CloseEP(pdev,
HID_OUT_EP);
/* FRee allocated memory */
if(pdev->pClassData != NULL)
{
USBD_free(pdev->pClassData);
pdev->pClassData = NULL;
}
return USBD_OK;
}

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8.新增out函数，先声明
static uint8_t USBD_HID_DataOut (USBD_HandleTypeDef *pdev, uint8_t epnum);
然后注册一下

/** @defgroup USBD_HID_Private_Variables
* @{
*/
USBD_ClassTypeDef USBD_HID =
{
USBD_HID_Init,
USBD_HID_DeInit,
USBD_HID_Setup,
NULL, /*EP0_TxSent*/
NULL, /*EP0_RxReady*/
USBD_HID_DataIn, /*DataIn*/
USBD_HID_DataOut, /*DataOut*/
NULL, /*SOF */
NULL,
NULL,
USBD_HID_GetCfgDesc,
USBD_HID_GetCfgDesc,
USBD_HID_GetCfgDesc,
USBD_HID_GetDeviceQualifierDesc,
};

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再然后就是在里面实现回环

/**
* @brief USBD_HID_DataIn
* handle data IN Stage
* @param pdev: device instance
* @param epnum: endpoint index
* @retval status
*/
static uint8_t USBD_HID_DataOut(USBD_HandleTypeDef *pdev,
uint8_t epnum)
{
uCountRXbuff = USBD_GetRxCount(pdev,epnum);
// add your own data to process the received data
/*
* printf_the_received_data((char *)USB_Rx_Buffer, USB_Rx_Cnt);
*/
/* Prepare Out endpoint to receive next packet */
USBD_LL_PrepareReceive(pdev,
HID_OUT_EP,
(uint8_t*)(USB_Rx_Buffer),
HID_OUT_BULK_PACKET);
USBD_HID_SendReport (pdev,
(uint8_t*)&USB_Rx_Buffer,
uCountRXbuff);
return USBD_OK;
}

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9.基本完成了，然后打开usbd_conf.c,新增OUT缓冲地址，分配 64个字节

/**
* @brief Initializes the Low Level portion of the Device driver.
* @param pdev: Device handle
* @retval USBD Status
*/
USBD_StatusTypeDef USBD_LL_Init (USBD_HandleTypeDef *pdev)
{
/* Init USB_IP */
/* Link The driver to the stack */
hpcd_USB_FS.pData = pdev;
pdev->pData = &hpcd_USB_FS;
hpcd_USB_FS.Instance = USB;
hpcd_USB_FS.Init.dev_endpoints = 8;
hpcd_USB_FS.Init.speed = PCD_SPEED_FULL;
hpcd_USB_FS.Init.ep0_mps = DEP0CTL_MPS_64;
hpcd_USB_FS.Init.phy_itface = PCD_PHY_EMBEDDED;
hpcd_USB_FS.Init.low_power_enable = DISABLE;
hpcd_USB_FS.Init.lpm_enable = DISABLE;
hpcd_USB_FS.Init.battery_charging_enable = DISABLE;
if (HAL_PCD_Init(&hpcd_USB_FS) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , 0x00 , PCD_SNG_BUF, 0x18);
HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , 0x80 , PCD_SNG_BUF, 0x58);
HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , 0x81 , PCD_SNG_BUF, 0x100);
HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , 0x01 , PCD_SNG_BUF, 0x140);
return USBD_OK;
}