2023-08-03 13:39:34
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STM32模拟USB多点触控屏开发准备
代码修改
1.usb_pwr.c RESULT PowerOn(void)
{
u16 wRegVal;
//USB_Cable_Config(ENABLE);//这里由于硬件问题用不到，注释
/*** CNTR_PWDN = 0 ***/
wRegVal = CNTR_FRES;
_SetCNTR(wRegVal);
/*** CNTR_FRES = 0 ***/
wInterrupt_Mask = 0;
_SetCNTR(wInterrupt_Mask);
/*** Clear pending interrupts ***/
_SetISTR(0);
/*** Set interrupt mask ***/
wInterrupt_Mask = CNTR_RESETM | CNTR_SUSPM | CNTR_WKUPM;
_SetCNTR(wInterrupt_Mask);
return USB_SUCCESS;
}
2.usb_proc.c void Joystick_Reset(void)
{
/* Set Joystick_DEVICE as not configured */
pInformation->Current_Configuration = 0;
pInformation->Current_Interface = 0;/* the default Interface */
/* Current Feature initialization */
pInformation->Current_Feature = Joystick_ConfigDescriptor[7];
SetBTABLE(BTABLE_ADDRESS);
/* Initialize Endpoint 0 */
SetEPType(ENDP0, EP_CONTROL);
SetEPTxStatus(ENDP0, EP_TX_STALL);
SetEPRxAddr(ENDP0, ENDP0_RXADDR);
SetEPTxAddr(ENDP0, ENDP0_TXADDR);
Clear_Status_Out(ENDP0);
SetEPRxCount(ENDP0, Device_Property.MaxPacketSize);
SetEPRxValid(ENDP0);
/* Initialize Endpoint In 1 */
SetEPType(ENDP1, EP_INTERRUPT); //初始化为中断端点类型
SetEPTxAddr(ENDP1, ENDP1_TXADDR); //设置发送数据的地址
SetEPTxCount(ENDP1, 14); //设置发送的长度,这里由于使用的两点触控的触控屏需要发送的数据为14Bytes一次
SetEPTxStatus(ENDP1, EP_TX_NAK); //设置端点处于忙状态
/* Initialize Endpoint Out 1 */
SetEPRxAddr(ENDP1, ENDP1_RXADDR); //设置接收数据的地址
SetEPRxCount(ENDP1, 2); //设置接收长度
SetEPRxStatus(ENDP1, EP_RX_VALID); //设置端点有效，可以接收数据
bDeviceState = ATTACHED;
/* Set this device to response on default address */
SetDeviceAddress(0);
}
由于需要 枚举的是多点触控屏，需要处理Get_Report和Set_Report，虽然有些人说Set_Report不需要处理，但是我还是顺手处理掉了。 /*******************************************************************************
添加上获取HID描述符和报告描述符函数
*******************************************************************************/
ONE_DESCRIPTOR Test_Hid_Descriptor =
{
(u8*)Joystick_ConfigDescriptor + Test_OFF_HID_DESC,
JOYSTICK_SIZ_HID_DESC
};
ONE_DESCRIPTOR Test_Report_Descriptor =
{
(u8 *)TestReportDescriptor,
Test_ReportDescriptor_Size
};
u8 *Test_GetHIDDescriptor(u16 Length)
{
return Standard_GetDescriptorData(Length, &Test_Hid_Descriptor);
}
u8 *Test_GetReportDescriptor(u16 Length)
{
return Standard_GetDescriptorData(Length, &Test_Report_Descriptor);
}
/*******************************************************************************
这里用来处理Get_Report Set_Report
*******************************************************************************/
u8 Report_Buffer[2] = {0x02, 0x02}; //Report_Buffer[0]为FeatureID，
//Report_Buffer[1]为最大触控点数
u8 *Joystick_GetReport(u16 Length) //处理Get_Report
{
if(Length == 0)
{
pInformation->Ctrl_Info.Usb_wLength = 2;
return NULL;
}
return &Report_Buffer[pInformation->Ctrl_Info.Usb_wOffset];
}
u8 *Joystick_SetReport(u16 Length)//处理Set_Report
{
if(Length == 0)
{
pInformation->Ctrl_Info.Usb_wLength = 2;
return NULL;
}
return &Report_Buffer[pInformation->Ctrl_Info.Usb_wOffset];
}
RESULT Joystick_Data_Setup(u8 RequestNo)
{
u8 *(*CopyRoutine)(u16);
CopyRoutine = NULL;
if ((RequestNo == GET_DESCRIPTOR)
&& (Type_Recipient == (STANDARD_REQUEST | INTERFACE_RECIPIENT))
&& (pInformation->USBwIndex0 < 3))
{
if (pInformation->USBwValue1 == REPORT_DESCRIPTOR)
{
CopyRoutine = Test_GetReportDescriptor;
}
else if (pInformation->USBwValue1 == HID_DESCRIPTOR_TYPE)
{
CopyRoutine = Test_GetHIDDescriptor;
}
} /* End of GET_DESCRIPTOR */
/*** GET_PROTOCOL ***/
else if ((Type_Recipient == (CLASS_REQUEST | INTERFACE_RECIPIENT))
&& RequestNo == GET_PROTOCOL)
{
CopyRoutine = Joystick_GetProtocolValue;
}
/******************************************************************
Add Handle Get_Report and Set_Report CTL:
******************************************************************/
else if((Type_Recipient == (CLASS_REQUEST | INTERFACE_RECIPIENT)))
{
switch(RequestNo)
{
case GET_REPORT:
CopyRoutine = Joystick_GetReport;
break;
case SET_REPORT:
CopyRoutine = Joystick_SetReport;
break;
default:
break;
}
}
if (CopyRoutine == NULL)
{
return USB_UNSUPPORT;
}
pInformation->Ctrl_Info.CopyData = CopyRoutine;
pInformation->Ctrl_Info.Usb_wOffset = 0;
(*CopyRoutine)(0);
return USB_SUCCESS;
}
3.usb_conf.h //地址为32位对其,位4的倍数，不能超过 bMaxPacketSize /* EP0 */ /* rx/tx buffer base address */ #define ENDP0_RXADDR (0x40) #define ENDP0_TXADDR (0x80) /* EP1 */ /* rx/tx buffer base address */ #define ENDP1_RXADDR (0xc0) #define ENDP1_TXADDR (0x100)
4.usb_desc.h #define JOYSTICK_SIZ_CONFIG_DESC 41 //配置描述符的大写改为41，即0x29 #define Test_ReportDescriptor_Size 202 //触控屏报表描述符长度 #define Test_OFF_HID_DESC 18 //触控屏HID描述符的偏移量 extern const u8 TestReportDescriptor[Test_ReportDescriptor_Size];//extern一下
5.usb_desc.c const u8 Joystick_ConfigDescriptor[JOYSTICK_SIZ_CONFIG_DESC] =
{
/***************配置描述符***********************/
0x09, //bLength字段
USB_CONFIGURATION_DESCRIPTOR_TYPE, //bDescriptorType字段
JOYSTICK_SIZ_CONFIG_DESC&0xff, //wTotalLength字段
(JOYSTICK_SIZ_CONFIG_DESC>>8)&0xff,
0x01, //bNumInterfaces字段
0x01, //bConfiguration字段
0x00, //iConfigurationz字段
0x80, //bmAttributes字段
0x20, //bMaxPower字段
/* 9 */
/*******************第一个接口描述符*********************/
0x09, //bLength字段
USB_INTERFACE_DESCRIPTOR_TYPE, //bDescriptorType字段
0x00, //bInterfaceNumber字段
0x00, //bAlternateSetting字段
0x02, //bNumEndpoints字段
0x03, //bInterfaceClass字段
0x00, //bInterfaceSubClass字段
0x00, //bInterfaceProtocol字段
0x00, //iConfiguration字段
/* 18 */
/******************HID描述符************************/
0x09, //bLength字段
0x21, //bDescriptorType字段
0x01, //bcdHID字段
0x01,
0x00, //bCountyCode字段
0x01, //bNumDescriptors字段
0x22, //bDescriptorType字段
Test_ReportDescriptor_Size&0xFF,
(Test_ReportDescriptor_Size>>8)&0xFF,
/* 27 */
/**********************输入端点描述符***********************/
0x07, //bLength字段
USB_ENDPOINT_DESCRIPTOR_TYPE, //bDescriptorType字段
0x81, //bEndpointAddress字段
0x03, //bmAttributes字段
0x10, //wMaxPacketSize字段
0x00,
0x0A, //bInterval字段
/* 34 */
/**********************输出端点描述符***********************/
0x07, //bLength字段
USB_ENDPOINT_DESCRIPTOR_TYPE, //bDescriptorType字段
0x01, //bEndpointAddress字段
0x03, //bmAttributes字段
0x10, //wMaxPacketSize字段
0x00,
0x0A, //bInterval字段
/* 41 */
const u8 TestReportDescriptor[Test_ReportDescriptor_Size] =
{
/* 多点触控设备 */
0x05, 0x0d,// USAGE_PAGE (Digitizers)
0x09, 0x04,// USAGE (Touch Screen)
0xa1, 0x01,// COLLECTION (Application)
0x85, 0x01,//REPORTID_MTOUCH, // REPORT_ID (Touch)
/* 8 */
/* 第一点 */
/* 手指和z轴 */
0x09, 0x22,// USAGE (Finger)
0xa1, 0x02,// COLLECTION (Logical)
0x09, 0x42,// USAGE (Tip Switch)
0x15, 0x00,// LOGICAL_MINIMUM (0)
0x25, 0x01,// LOGICAL_MAXIMUM (1)
0x75, 0x01,// REPORT_SIZE (1)
0x95, 0x01,// REPORT_COUNT (1)
0x81, 0x02,// INPUT (Data,Var,Abs)
0x09, 0x32,// USAGE (In Range)
0x81, 0x02,// INPUT (Data,Var,Abs)
0x95, 0x06,// REPORT_COUNT (6)
0x81, 0x01,// INPUT (Cnst,Ary,Abs)
/* 32 */
/* 手指ID */
0x75, 0x08,// REPORT_SIZE (8)
0x09, 0x51,// USAGE ( Contact Identifier)
0x25, 0xFF,// LOGICAL_MAXIMUM (255)
0x95, 0x01,// REPORT_COUNT (1)
0x81, 0x02,// INPUT (Data,Var,Abs)
/* 42 */
/* X和Y */
0x05, 0x01,// USAGE_PAGE (Generic Desk)
0x16, 0x00,0x00,//HID_LogicalMinS (0)
0x26, 0x56, 0x05,// LOGICAL_MAXIMUM (1366)
0x75, 0x10,// REPORT_SIZE (16)
0x55, 0x00,// UNIT_EXPONENT (0)
0x65, 0x00,// UNIT (00)
0x09, 0x30,// USAGE (X)
0x36, 0x00,0x00,// PHYSICAL_MINIMUM (0)
0x46, 0x56, 0x05,// PHYSICAL_MAXIMUM (1366)
0x95, 0x01,// REPORT_COUNT (1)
0x81, 0x02,// INPUT (Data,Var,Abs)
0x26, 0x00, 0x03,// LOGICAL_MAXIMUM (4095)
0x46, 0x00, 0x03,// PHYSICAL_MAXIMUM (4095)
0x09, 0x31,// USAGE (Y)
0x81, 0x02,// INPUT (Data,Var,Abs)
0xc0, // END_COLLECTION
/* 79 */
/* 第二点 */
/* 手指和z轴 */
0x05, 0x0d,// USAGE_PAGE (Digitizers)
0x09, 0x22,// USAGE (Finger)
0xa1, 0x02,// COLLECTION (Logical)
0x09, 0x42,// USAGE (Tip Switch)
0x15, 0x00,// LOGICAL_MINIMUM (0)
0x25, 0x01,// LOGICAL_MAXIMUM (1)
0x75, 0x01,// REPORT_SIZE (1)
0x95, 0x01,// REPORT_COUNT (1)
0x81, 0x02,// INPUT (Data,Var,Abs)
0x09, 0x32,// USAGE (In Range)
0x81, 0x02,// INPUT (Data,Var,Abs)
0x95, 0x06,// REPORT_COUNT (6)
0x81, 0x01,// INPUT (Cnst,Ary,Abs)
/* 105 */
/* 手指ID */
0x75, 0x08,// REPORT_SIZE (8)
0x09, 0x51,// USAGE ( Contact Identifier)
0x95, 0x01,// REPORT_COUNT (1)
0x25, 0xFF,// LOGICAL_MAXIMUM (255)
0x81, 0x02,// INPUT (Data,Var,Abs)
/* 115 */
/* X和Y */
0x05, 0x01,// USAGE_PAGE (Generic Desk..
0x26, 0x56, 0x05, // LOGICAL_MAXIMUM (1366)
0x75, 0x10,// REPORT_SIZE (16)
0x55, 0x00,// UNIT_EXPONENT (0)
0x65, 0x00,// UNIT (0)
0x09, 0x30,// USAGE (X)
0x36, 0x00,0x00,// PHYSICAL_MINIMUM (0)
0x46, 0x56, 0x05,// PHYSICAL_MAXIMUM (1366)
0x81, 0x02,// INPUT (Data,Var,Abs)
0x26, 0x00, 0x03,
0x46, 0x00, 0x03,// PHYSICAL_MAXIMUM (0)
0x09, 0x31,// USAGE (Y)
0x81, 0x02,// INPUT (Data,Var,Abs)
0xc0, //END_COLLECTION
/* 147 */
/* 实际点数 */
0x05, 0x0d,// USAGE_PAGE (Digitizers)
0x09, 0x54,// USAGE (Actual count)
0x95, 0x01,// REPORT_COUNT (1)
0x75, 0x08,// REPORT_SIZE (8)
0x15, 0x00,// LOGICAL_MINIMUM (0)
0x25, 0x08,// LOGICAL_MAXIMUM (8)
0x81, 0x02,// INPUT (Data,Var,Abs)
/* 161 */
/* 硬件支持点数 */
0x85, 0x02,// REPORT_ID (Feature)
0x75, 0x08,// REPORT_SIZE (8)
0x95, 0x01,// REPORT_COUNT (1)
0x15, 0x01,// LOGICAL_MINIMUM (1)
0x25, 0x08,// LOGICAL_MAXIMUM (8)
0x09, 0x55,// USAGE(Maximum Count)
0xB1, 0x02,// FEATURE (Data,Var,Abs)
0xc0, // END_COLLECTION
/* 176 */
/* 上位机特性设定 */
0x09, 0x0E,// USAGE (Device Configuration)
0xa1, 0x01,// COLLECTION (Application)
0x85, 0x04,// REPORT_ID (Configuration)
0x09, 0x23,// USAGE (Device Settings)
0xa1, 0x02,// COLLECTION (logical)
0x09, 0x52,// USAGE (Device Mode)
0x15, 0x00,// LOGICAL_MINIMUM (0)
0x25, 0x0a,// LOGICAL_MAXIMUM (10)
0x75, 0x08,// REPORT_SIZE (8)
0x09, 0x53,// USAGE (Device Identifier)
0x95, 0x01,// REPORT_COUNT (2)
0xb1, 0x02,// FEATURE (Data,Var,Abs
0xc0, // END_COLLECTION
0xc0, // END_COLLECTION
/* 202 */
};
枚举成功就可以在系统设备中找到枚举的触控屏设备信息了，这里使用的是Usblyer。
如何测试 void Test_Send(uint8_t *buf, uint16_t len)
{
// 对于本代码2点触控每个数据包由14个字节组成分别为
// InReport[0] 设备ID 固定值为TOUCH_REPORT_ID
// InReport[1] 第一点触摸情况 bit1:1有触摸 0没触摸 bit2: 1在范围内 0不在范围内
// InReport[2] 第一点ID 每个点在抬起之前不能改变 0~255
// InReport[3] 第一点X坐标低8位
// InReport[4] 第一点X坐标高8位
// InReport[5] 第一点Y坐标低8位
// InReport[6] 第一点Y坐标高8位
// InReport[7] 第二点触摸情况 bit1:1有触摸 0没触摸 bit2: 1在范围内 0不在范围内
// InReport[8] 第二点ID 每个点在抬起之前不能改变 0~255
// InReport[9] 第二点X坐标低8位
// InReport[10] 第二点X坐标高8位
// InReport[11] 第二点Y坐标低8位
// InReport[12] 第二点Y坐标高8位
// InReport[13] 此数据包中有效的点数
static uint8_t i = 0;
uint8_t Buffer[14];
if(i > 0 && i < 20)
{
Buffer[0] = 0x01;
Buffer[1] = 0x07;
Buffer[2] = 0x01;
Buffer[3] = 0x88;
Buffer[4] = 0x07;
Buffer[5] = 0x85;
Buffer[6] = 0x04;
Buffer[7] = 0x00;
Buffer[8] = 0x00;
Buffer[9] = 0x00;
Buffer[10] = 0x00;
Buffer[11] = 0x00;
Buffer[12] = 0x00;
Buffer[13] = 0x01;
}
if(i < 40 && i > 20)
{
Buffer[0] = 0x01;
Buffer[1] = 0x06;
Buffer[2] = 0x01;
Buffer[3] = 0x88;
Buffer[4] = 0x07;
Buffer[5] = 0x85;
Buffer[6] = 0x04;
Buffer[7] = 0x00;
Buffer[8] = 0x00;
Buffer[9] = 0x00;
Buffer[10] = 0x00;
Buffer[11] = 0x00;
Buffer[12] = 0x00;
Buffer[13] = 0x01;
}
if(i > 40)
{
Buffer[0] = 0x01;
Buffer[1] = 0x00;
Buffer[2] = 0x00;
Buffer[3] = 0x00;
Buffer[4] = 0x00;
Buffer[5] = 0x00;
Buffer[6] = 0x00;
Buffer[7] = 0x00;
Buffer[8] = 0x00;
Buffer[9] = 0x00;
Buffer[10] = 0x00;
Buffer[11] = 0x00;
Buffer[12] = 0x00;
Buffer[13] = 0x00;
}
i++;
if(i > 60)
{
i = 0;
}
UserToPMABufferCopy(Buffer, GetEPTxAddr(ENDP1) , 14);
SetEPTxValid(ENDP1);
return;
}
这份东西还有很多不足的地方，报表那边的逻辑大小是需要对应触控屏的，触点是可以增加的，发送的数据坐标有些问题，目前还在调试中。。。
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