Table of Contents
How to use Stm32f7 – Disco board as a usb mouse
In /../Middlewares/ST/STM32_USB_Device_Library/Class/HID/Src
edit file usbd_hid.c
…………………………..
__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*/
0x01, /*bNumEndpoints*/
0x03, /*bInterfaceClass: HID*/
0x01, /*bInterfaceSubClass : 1=BOOT, 0=no boot*/
0x02, /*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 ********************/
/* 27 */
0x07, /*bLength: Endpoint Descriptor size*/
USB_DESC_TYPE_ENDPOINT, /*bDescriptorType:*/
HID_EPIN_ADDR, /*bEndpointAddress: Endpoint Address (IN)*/
0x03, /*bmAttributes: Interrupt endpoint*/
HID_EPIN_SIZE, /*wMaxPacketSize: 4 Byte max */
0x00,
HID_FS_BINTERVAL, /*bInterval: Polling Interval (10 ms)*/
/* 34 */
} ;
…………………………..
__ALIGN_BEGIN static uint8_t HID_MOUSE_ReportDesc[HID_MOUSE_REPORT_DESC_SIZE] __ALIGN_END =
{
0x05, 0x01,
0x09, 0x02,
0xA1, 0x01,
0x09, 0x01,
0xA1, 0x00,
0x05, 0x09,
0x19, 0x01,
0x29, 0x03,
0x15, 0x00,
0x25, 0x01,
0x95, 0x03,
0x75, 0x01,
0x81, 0x02,
0x95, 0x01,
0x75, 0x05,
0x81, 0x01,
0x05, 0x01,
0x09, 0x30,
0x09, 0x31,
0x09, 0x38,
0x15, 0x81,
0x25, 0x7F,
0x75, 0x08,
0x95, 0x03,
0x81, 0x06,
0xC0, 0x09,
0x3c, 0x05,
0xff, 0x09,
0x01, 0x15,
0x00, 0x25,
0x01, 0x75,
0x01, 0x95,
0x02, 0xb1,
0x22, 0x75,
0x06, 0x95,
0x01, 0xb1,
0x01, 0xc0
};
And in Src/main.c add
#include “stm32f7xx_hal.h”
#include “usb_device.h”
#include “usbd_hid.h”
#include <string.h>
#include “stm32f7xx_hal_uart.h”
#include “stm32f7xx_hal_sdram.h”
#include “stm32f7xx_hal_ltdc.h”
#include “stm32746g_discovery.h”
#include “stm32746g_discovery_ts.h”
#include “stm32746g_discovery_lcd.h”
#include “stm32746g_discovery_sdram.h”
#include “stm32f7xx_ll_fmc.h”
#include “stdio.h”
#include <stdbool.h>
void SystemClock_Config(void);
void Error_Handler(void);
static void MX_GPIO_Init(void);
TS_StateTypeDef TS_State;
extern USBD_HandleTypeDef hUsbDeviceHS;
uint8_t buffer[4];
int main(void)
{
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USB_DEVICE_Init();
BSP_LCD_Init();
BSP_LED_Init(LED1);
BSP_LCD_LayerDefaultInit(0, LCD_FB_START_ADDRESS);
BSP_LCD_LayerDefaultInit(1, LCD_FB_START_ADDRESS+(BSP_LCD_GetXSize()*BSP_LCD_GetYSize()*4));
BSP_LCD_DisplayOn();
BSP_LCD_SelectLayer(0);
BSP_LCD_Clear(LCD_COLOR_BLACK);
BSP_LCD_SelectLayer(1);
BSP_LCD_Clear(LCD_COLOR_BLACK);
BSP_LCD_SetFont(&LCD_DEFAULT_FONT);
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
BSP_LCD_SetTextColor(LCD_COLOR_DARKBLUE);
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
if( BSP_TS_Init(BSP_LCD_GetXSize(), BSP_LCD_GetYSize())!=TS_OK){
Error_Handler();
}
buffer[0]=0x00;
buffer[1]=0x00;
buffer[2]=0x00;
buffer[3]=0x00;
USBD_HID_SendReport(&hUsbDeviceHS,buffer,sizeof(buffer));
BSP_LCD_Clear(LCD_COLOR_WHITE);
BSP_LCD_DrawRect(130, 40, 200, 120);
BSP_LCD_DrawRect(130, 180, 100, 60);
BSP_LCD_DrawRect(230, 180, 100, 60);
BSP_LCD_DrawRect(360, 40, 30, 120);
int x_touch,y_touch,pre_x_touch,pre_y_touch;
//bool mouse_ok=true;
int mouse_ok=0;
BSP_LED_On(LED1);
while (1)
{
BSP_TS_GetState(&TS_State);
if (TS_State.touchDetected==1) {
x_touch=TS_State.touchX[0];
y_touch=TS_State.touchY[0];
if(mouse_ok==0){
pre_x_touch=x_touch;
pre_y_touch=y_touch;
}
else if(mouse_ok==1){
if((x_touch>130&&x_touch<330)&&(y_touch>40&&y_touch<160)){
buffer[1]=3*(x_touch-pre_x_touch);
buffer[2]=3*(y_touch-pre_y_touch);
}
else if((x_touch>130&&x_touch<230)&&(y_touch>180&&y_touch<240)){
buffer[0]=0x01;
BSP_LED_Off(LED1);
}
else if((x_touch>230&&x_touch<330)&&(y_touch>180&&y_touch<240)){
buffer[0]=0x02;
}
else if((x_touch>360&&x_touch<400)&&(y_touch>40&&y_touch<160)){
buffer[3]=(int)((y_touch-pre_y_touch)/4);
}
USBD_HID_SendReport(&hUsbDeviceHS,buffer,sizeof(buffer));
}
mouse_ok=1;
pre_x_touch=x_touch;
pre_y_touch=y_touch;
}
else if(TS_State.touchDetected==0){
mouse_ok=0;
BSP_LED_On(LED1);
}
USBD_HID_SendReport(&hUsbDeviceHS,buffer,sizeof(buffer));
HAL_Delay(40);
buffer[0]=0x00;
buffer[1]=0x00;
buffer[2]=0x00;
buffer[3]=0x00;
}
/* USER CODE END 3 */
}
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