I know the default setting value for 'VIRTUAL_COM_PORT_DATA_SIZE 64' at usb_desc.h for STM32 Library.
however, I want to get the 255 bytes at one time due to the long packets of our project.
So I have changed the following modify code point, I couldn't get the right value with problem for 'USB defect problem'.
/****** usb_prop.c **********/
DEVICE_PROP Device_Property = {
Virtual_Com_Port_init,
Virtual_Com_Port_Reset,
Virtual_Com_Port_Status_In,
Virtual_Com_Port_Status_Out,
Virtual_Com_Port_Data_Setup,
Virtual_Com_Port_NoData_Setup,
Virtual_Com_Port_Get_Interface_Setting,
Virtual_Com_Port_GetDeviceDescriptor,
Virtual_Com_Port_GetConfigDescriptor,
Virtual_Com_Port_GetStringDescriptor,
0,
0xFF /*MAX PACKET SIZE*/ // default : 0x40
};
/****** usb_desc.c **********/
/* USB Standard Device Descriptor */
const uint8_t Virtual_Com_Port_DeviceDescriptor[] = {
0x12, /* bLength */
USB_DEVICE_DESCRIPTOR_TYPE, /* bDescriptorType */
0x00,
0x02, /* bcdUSB = 2.00 */
0x02, /* bDeviceClass: CDC */
0x00, /* bDeviceSubClass */
0x00, /* bDeviceProtocol */
0xFF, /* bMaxPacketSize0 */ // default : 0x40
0x83,
0x04, /* idVendor = 0x0483 */
0x40,
0x57, /* idProduct = 0x7540 */
0x00,
0x02, /* bcdDevice = 2.00 */
1, /* Index of string descriptor describing manufacturer */
2, /* Index of string descriptor describing product */
3, /* Index of string descriptor describing the device's serial number */
0x01 /* bNumConfigurations */ };
/****** usb_desc.h **********/
#define VIRTUAL_COM_PORT_DATA_SIZE 255 // 0xFF, default : 64
please tell me how to modify in order to send as 255 bytes from USB packets.
You can't do it this way. The size of the packet is USB endpoint related and for the FS USB it is always 64 bytes. My advice is: do not modify any descriptors unless you really know what are you doing (which is not the case here).
How to receive larger chunks of data:
create a buffer
when data arrives copy it (append) to that buffer
check if you have received all data needed
if not go to point (2) else goto point(5)
Do something with the data (your large packet)
Reset the buffer and goto point 2
Related
I want to transfer 256 bytes from host to stm32f103 device over USB Custom HID interface
Currently, 64 bytes Read/Write is Working
Following is the Report Descriptor in my stm32:
/** Usb HID report descriptor. */
static uint8_t CUSTOM_HID_ReportDesc_FS[USBD_CUSTOM_HID_REPORT_DESC_SIZE] __ALIGN_END ={
0x06,0x00,0xFF, //Usage Page 0xff00
0x09, 0x01, //USAGE (Pointer)
0xA1,0x01, //Collection (application)
//Input Report
0x19,0x01, //Usage Minimum
0x29,0x40, //Usage Minimum
0x15,0x00, //Logical Minimum
0x26,0xFF,0x00, //Logical Minimum
0x75,0x08, //report size : 8-bit field size
0x95, CUSTOM_HID_EPIN_SIZE,//Report count
0x81,0x02, //Input (data, array, Abs)
//Output Report
0x19,0x01, //usage Minimum
0x29,0x40, //usage Minimum
0x75,0x08, //report size : 8-bit field size
0x95,CUSTOM_HID_EPOUT_SIZE,//Report Count
0x91,0x02, //Output (data, array, Abs)
0xC0 //END_COLLECTION
};
If, I am changing the CUSTOM_HID_EPIN_SIZE,CUSTOM_HID_EPOUT_SIZE to 256, my USB device is not recognized.
I need some help to modify the report descriptor to support 256 byte transfer
Thanks
I am using PIC32MX350F128L Microcontroller to read from and write to EEPROM(SST26VF032B) using SPI communication. SPI communication in this program is working, I have checked it by sending JEDEC code which is provided in the SST26VF032B datasheet. So when i send 0x9F i am getting 3 bytes of data as mentioned in the datasheet. When i run now i am sending a string of data to a specific address of eeprom and getting 0xff in return. I am erasing the eeprom before writing into it. So i think i am getting 0xff after erasing the eeprom. The writing, reading operations are not working. If i send a string of value or a BYTE i am getting 0xff in return. So can u guys please suggest me where i am going wrong. I am using UART for debugging purpose to read values recieved through spi communication. The complete code is below, i am using MPLAB X.
Best Regards
Sandesh
#include <xc.h>
#include <stdio.h>
#include <plib.h>
#include <p32xxxx.h>
/* Configuration Bits */
#pragma config FSRSSEL = PRIORITY_7 // Shadow Register Set Priority Select (SRS Priority 7)
#pragma config PMDL1WAY = ON // Peripheral Module Disable Configuration (Allow only one reconfiguration)
#pragma config IOL1WAY = ON // Peripheral Pin Select Configuration (Allow only one reconfiguration)
// DEVCFG2
#pragma config FPLLIDIV = DIV_2 // PLL Input Divider (2x Divider)
#pragma config FPLLMUL = MUL_20 // PLL Multiplier (20x Multiplier)
#pragma config FPLLODIV = DIV_1 // System PLL Output Clock Divider (PLL Divide by 1)
// DEVCFG1
#pragma config FNOSC = PRIPLL // Oscillator Selection Bits (Primary Osc (XT,HS,EC))
#pragma config FSOSCEN = ON // Secondary Oscillator Enable (Enabled)
#pragma config IESO = ON // Internal/External Switch Over (Enabled)
#pragma config POSCMOD = HS // Primary Oscillator Configuration (XT osc mode)
#pragma config OSCIOFNC = ON // CLKO Output Signal Active on the OSCO Pin (Enabled)
#pragma config FPBDIV = DIV_1 // Peripheral Clock Divisor (Pb_Clk is Sys_Clk/8)
#pragma config FCKSM = CSECME // Clock Switching and Monitor Selection (Clock Switch Disable, FSCM Disabled)
#pragma config WDTPS = PS1048576 // Watchdog Timer Postscaler (1:1048576)
#pragma config WINDIS = OFF // Watchdog Timer Window Enable (Watchdog Timer is in Non-Window Mode)
#pragma config FWDTEN = OFF // Watchdog Timer Enable (WDT Disabled (SWDTEN Bit Controls))
#pragma config FWDTWINSZ = WINSZ_25 // Watchdog Timer Window Size (Window Size is 25%)
// DEVCFG0
#pragma config DEBUG = OFF // Background Debugger Enable (Debugger is Disabled)
#pragma config JTAGEN = OFF // JTAG Enable (JTAG Disabled)
#pragma config ICESEL = ICS_PGx2 // ICE/ICD Comm Channel Select (Communicate on PGEC2/PGED2)
#pragma config PWP = OFF // Program Flash Write Protect (Disable)
#pragma config BWP = OFF // Boot Flash Write Protect bit (Protection Disabled)
#pragma config CP = OFF // Code Protect (Protection Disabled)
/* MACRO DEFINITIONS */
/* Defining the Slave Select Pin */
#define SS LATDbits.LATD9
/* Defining the System Clock Frequency */
#define SYSCLK 40000000
/* Macro to get array size in bytes
* note that array size can't be found after passing pointer to a function */
#define LEN(x) (sizeof(x) / sizeof(x[0]))
/* SST26VF032B EEPROM instructions */
/* Write Enable */
#define WREN 0x06
/* Write Disable */
#define WRDI 0x04
/* Initialize Start of Write Sequence */
#define WRITE 0x02
/* Initialize Start of Read Sequence */
#define READ 0x03
/* Erase all sectors of Memory */
#define CE 0xc7
/* Read STATUS Register */
#define RDSR 0x05
/* Function Prototypes */
/* UART bit configuration */
void Bitconfig_uart(void);
/* SPI Initialization */
void SPI1_Init(void);
/* UART Initialization */
void Init_uart(void);
/* Send a Character Byte through UART */
void UART5PutChar(char Ch);
/* Function to Read and Write SPI1 buffer */
int SPI1_transfer( int b);
/* Function to check the Status of SPI */
void waitBusy();
/* Function to erase the contents in EEPROM */
void eraseEEPROM();
/* Function to Read data from EEPROM */
void readEEPROM( int address, char* loadArray, int loadArray_size);
/* Function to Write to EEPROM */
void writeEEPROM( int address, char* storeArray, int storeArray_size);
/* Global Variables Declaration */
/* Declare variables to check the functionality of EEPROM */
int i,j = 0;
char st = 0x9F;
char rec;
int x,y,z;
/*******************************************************************************
* Function Name: main()
********************************************************************************
* Summary:
* Initializes SPI
* Erase EEPROM
* Writes to EEPROM
* Read from EEPROM
*
* Parameters:
* None.
*
* Return:
* None.
*
*******************************************************************************/
int main()
{
int i;
/* Clock Setting */
SYSTEMConfigPerformance(SYSCLK);
/* UART bit configuration */
Bitconfig_uart();
/* Set the Controller OScillator Register bits */
//OSCCON = 0x00002200;
/* Initialize a String to Write to EEPROM and an array to Read back contents */
char writeData[] = "123456789ABCDEF";
/* Array to read 35 bytes of data */
char readData[15];
/* SPI Initialization */
SPI1_Init();
/* UART Initialization */
Init_uart();
/* Erase contents of EEPROM */
eraseEEPROM();
/* Write contents of writeData array to address 180 */
writeEEPROM( 0x1000, writeData, LEN(writeData));
/*
JEDEC Code (working) getting output as per datasheet (0x9F = 159)
SS=0;
SPI1_transfer(159);
x=SPI1_transfer(0);
UART5PutChar(x);
y=SPI1_transfer(0);
UART5PutChar(y);
z=SPI1_transfer(0);
UART5PutChar(z);
*/
while(1)
{
/* Read contents of EEPROM into readData array
* start at address 180 and read up to 180+length(readData) */
readEEPROM( 0x1000, readData, LEN(readData) );
}
} /* END main() */
/*******************************************************************************
* Function Name: SPI1_Init()
********************************************************************************
* Summary:
* SPI1 Initialization
*
* Parameters:
* None.
*
* Return:
* None.
*
*******************************************************************************/
void SPI1_Init(void)
{
/* Configure Peripheral Pin Select (PPS) for the SPI1 module
* Note: SS will be toggled manually in code
* SCK is hardwired to pin 55 */
/* Output Pin Selection */
RPE5R = 8;
SDI1R = 3;
/* RB4 (Slave Select 1) : output */
TRISDbits.TRISD9 = 0;
/* SPI configuration */
/* SPI1CON Register Configuration
* MSTEN: Master Mode Enable bit = 1 (Master)
* CKP (clock polarity control) = 0
* CKE (clock edge control) = 1
* ON: SPI Peripheral On bit
* 8-bit, Master Mode */
SPI1CON = 0x8120;
/* SPI1BRG Register Configuration */
SPI1BRG = 0x4D;
//REFOCONbits.ON = 1;
// REFOCONbits.DIVSWEN = 1;
}
/*******************************************************************************
* Function Name: SPI1_transfer()
********************************************************************************
* Summary:
* Write to and Read from SPI1 buffer
*
* Parameters:
* char b - Writes a Character to Buffer
*
* Return:
* Char - Returns the Character Read from EEPROM
*
*******************************************************************************/
int SPI1_transfer( int b)
{
/* write to buffer for TX */
SPI1BUF = b;
/* wait transfer complete */
while(!SPI1STATbits.SPIRBF);
/* read the received value */
return SPI1BUF;
} /* END SPI1_transfer() */
/*******************************************************************************
* Function Name: waitBusy()
********************************************************************************
* Summary:
* Checks if EEPROM is ready to be modified and waits if not ready
*
* Parameters:
* None.
*
* Return:
* None.
*
*******************************************************************************/
void waitBusy()
{
char status = 0;
do{
/* Select EEPROM */
SS = 0;
/* Read EEPROM status register */
SPI1_transfer(RDSR);
/* send dummy byte to receive incoming data */
status = SPI1_transfer(0);
/* Release EEPROM */
SS = 1;
}
/* write-in-progress while status<0> set to '1' */
while( status & 0x01);
} /* END waitBusy() */
/*******************************************************************************
* Function Name: readEEPROM()
********************************************************************************
* Summary:
* Reads data from EEPROM
*
* Parameters:
* Inputs: address - EEPROM address
* loadArray - array to load EEPROM data to
* loadArray_size - number of bytes of EEPROM data to load into array
*
* Return:
* None.
*
*******************************************************************************/
void readEEPROM( int address, char* loadArray, int loadArray_size)
{
int i;
/* Wait until EEPROM is not busy */
waitBusy();
/* Select EEPROM */
SS = 0;
/* Initiate Read */
SPI1_transfer( READ);
/* Address must be 16-bits but we're transferring it in two 8-bit sessions */
SPI1_transfer( address >> 16);
SPI1_transfer( address >> 8);
SPI1_transfer( address);
/* Request and store loadArray_size number of bytes into loadArray */
for( i=0 ; i<loadArray_size ; i++)
{
/* send dummy byte to read 1 byte */
loadArray[i] = SPI1_transfer( 0x00);
}
/* Release EEPROM */
SS = 1;
/* UART Test */
for(i=0;i<35;i++)
{
UART5PutChar(loadArray[i]);
for(j=0;j<20000;j++)
{}
}
} /* END readEEPROM() */
/*******************************************************************************
* Function Name: writeEEPROM()
********************************************************************************
* Summary:
* Write data to EEPROM
*
* Parameters:
* Inputs: address - EEPROM address
* storeArray - array of which contents are stored in EEPROM
* storeArray_size - number of bytes in array to store into EEPROM
*
* Return:
* None.
*
*******************************************************************************/
void writeEEPROM( int address, char* storeArray, int storeArray_size)
{
int i;
/* Wait until EEPROM is not busy */
waitBusy();
/* Select EEPROM */
SS = 0;
/* Send WRITE_ENABLE command */
SPI1_transfer( WREN);
/* Release EEPROM */
SS = 1;
/* Select EEPROM again after WREN cmd */
SS = 0;
/* Initiate Write */
SPI1_transfer( WRITE);
SPI1_transfer( address >> 16 );
SPI1_transfer( address >> 8 );
SPI1_transfer( address );
/* write 1 byte at a time from array */
/* MSB at lowest address (0 - first letter in string) */
for( i=0 ; i<storeArray_size; i++)
{
/* Initiate Write */
SPI1_transfer( WRITE);
SPI1_transfer( (address+i) >> 16 );
SPI1_transfer( (address+i) >> 8 );
SPI1_transfer( address+i );
SPI1_transfer( storeArray[i]);
}
/* Release EEPROM */
SS = 1;
} /* END writeEEPROM() */
/*******************************************************************************
* Function Name: eraseEEPROM()
********************************************************************************
* Summary:
* Erase entire contents of EEPROM
*
* Parameters:
* None
*
* Return:
* None.
*
*******************************************************************************/
void eraseEEPROM()
{
/* Wait until EEPROM is not busy */
waitBusy();
/* Select EEPROM */
SS = 0;
/* Send WRITE_ENABLE command */
SPI1_transfer( WREN);
/* Release EEPROM */
SS = 1;
/* Select EEPROM again after WREN cmd */
SS = 0;
/* send CHIP_ERASE command */
SPI1_transfer( CE);
/* Release EEPROM */
SS = 1;
} /* END eraseEEPROM() */
/*******************************************************************************
* Function Name: Init_uart()
********************************************g************************************
* Summary:
* Initialize UART4
*
* Parameters:
* None
*
* Return:
* None.
*
*******************************************************************************/
void Init_uart()
{
/* Enable UART */
U5MODEbits.ON = 1 ;
/* set baud rate(9600) */
U5BRG = 521;
/* Set U4STA Register for Enabling tx and rx */
U5STA=0x9400;
}
/*******************************************************************************
* Function Name: UART4PutChar(unsigned char Ch)
********************************************************************************
* Summary:
* Send data from controller to putty GUI
*
* Parameters:
* input
* unsigned char Ch - To Send a byte of data over UART
*
* Return:
* None.
*
*******************************************************************************/
void UART5PutChar(char Ch)
{
while(U5STAbits.UTXBF == 1);
U5TXREG=Ch;
}
/*******************************************************************************
* Function Name: Bitconfig_uart()
********************************************************************************
* Summary:
* UART Pin Configuration
*
* Parameters:
* None
*
* Return:
* None.
*
*******************************************************************************/
void Bitconfig_uart(void)
{
/* UART4 Initialization */
// OSCCON=0x00002200;
/* Set pins as digital */
ANSELBbits.ANSB2 = 0;
ANSELBbits.ANSB0 = 0;
/* Set UART Tx pin as Output */
TRISBbits.TRISB0 = 0; //in controler tx
TRISBbits.TRISB2 = 1; // in controller RX
/* Peripheral Pin select for UART4 */
U5RXR=0x07;
RPB0R=0x04;
}
I faced the same problem for 3 long days until I found that there's a 18bytes long register called Block Protection Register BPR.
You need to set its bits to 0, according to the memory area you want to write.
So I read the BPR (send command 0x72 followed by 18 byte read) and I found it was not at zero everywhere in my case.
Reading on page 41 of the datasheet you can see that after a power on the BPR register is set to 5555 FFFFFFFF FFFFFFFF, so it protects from write the whole memory.
So for testing purpose I tried to clears it completely, and there's a specific command (0x98) for that purpose, allowing you to write anywhere in the whole memory.
But be sure to write enable the memory (command 0x06) before sending the clear BPR command (command 0x98).
At this point if you read the BPR (command 0x72) you will read 00 at every of its 10 bytes. (And this means the whole memory is now writeable)
In this state the write now finally works for me.
(I sent WriteEnable - SectorErase - SectorRead - WriteEnable - SectorWrite - SectorRead and it now works!)
Hope it helps, the datasheet is very chaotic about that.
P.S.
Somewhere the datasheet says that BPR is 18 bytes long, it is wrong, the BPR is only 10 bytes long
For the past two weeks I have been trying to configure my card (STM32F4) to dialogue with USB HID with a PC under Windows 7. I make success with this descriptor:
__ALIGN_BEGIN static uint8_t HID_ReportDesc[HID_MOUSE_REPORT_DESC_SIZE] __ALIGN_END =
{
0x06, 0xFF, 0x00, // USAGE_PAGE (Vendor Page: 0xFF00)
0x09, 0x01, // USAGE (Demo Kit)
0xa1, 0x01, // COLLECTION (Application)
//0x85, 0x01, // REPORT_ID (1)
0x09, 0x02, // USAGE (DATA)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x26, 0xff,0x00, // LOGICAL_MAXIMUM (255)
0x75, 0x08, // REPORT_SIZE (8)
0x95, 0x04, // REPORT_COUNT (4)
0x81, 0x02, // INPUT (Data,Var,Abs,Vol)
0xc0 // END_COLLECTION
};
Like this, Windows recognizeS my card like a compliant HID component.
Now if I want to send 32 bit data like a uint32, Windows recognizes the card, but it sees an error to tell that it can't start it! My descriptor:
__ALIGN_BEGIN static uint8_t HID_MOUSE_ReportDesc[HID_MOUSE_REPORT_DESC_SIZE] __ALIGN_END =
{
0x06, 0xFF, 0x00, // USAGE_PAGE (Vendor Page: 0xFF00)
0x09, 0x01, // USAGE (Demo Kit)
0xa1, 0x01, // COLLECTION (Application)
0x09, 0x02, // USAGE (DATA)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x27, 0xff,0xff,0xff,0xff, // LOGICAL_MAXIMUM (65535)
0x75, 0x20, // REPORT_SIZE (32)
0x95, 0x01, // REPORT_COUNT (1)
0x81, 0x02, // INPUT (Data,Var,Abs,Vol)
0xc0 // END_COLLECTION
};
I didn't understand why it din't work!
After that, I use USBlyser to scan my other USB device on my PC, and I take this descriptor about my spacespilot 3D mouse:
Endpoint Descriptor 83 3 In, Interrupt, 16 ms
Offset Field Size Value Description
0 bLength 1 07h
1 bDescriptorType 1 05h Endpoint
2 bEndpointAddress 1 83h 3 In
3 bmAttributes 1 03h Interrupt
1..0: Transfer Type ......11 Interrupt
7..2: Reserved 000000..
4 wMaxPacketSize 2 0007h 7 bytes
6 bInterval 1 08h 16 ms
Interface 1 HID Report Descriptor Multi-Axis Controller
Item Tag (Value) Raw Data
Usage Page (Generic Desktop) 05 01
Usage (Multi-Axis Controller) 09 08
Collection (Application) A1 01
Collection (Physical) A1 00
Report ID (1) 85 01
Logical Minimum (-500) 16 0C FE
Logical Maximum (500) 26 F4 01
Physical Minimum (-32768) 36 00 80
Physical Maximum (32767) 46 FF 7F
Usage (X) 09 30
Usage (Y) 09 31
Usage (Z) 09 32
Report Size (16) 75 10
Report Count (3) 95 03
Input (Data,Var,Abs,NWrp,Lin,Pref,NNul,Bit) 81 02
End Collection C0
If I try this, it works fine:
__ALIGN_BEGIN static uint8_t HID_MOUSE_ReportDesc[HID_MOUSE_REPORT_DESC_SIZE] __ALIGN_END =
{
0x05, 0x01, // Usage Page (Generic Desktop)
0x09, 0x08, //Usage (Multi-Axis Controller)
0xa1, 0x01, // COLLECTION (Application)
0xa1, 0x00, // Collection (Physical)
0x85, 0x01, // Report ID (1)
0x16,0x0c,0xfe, // Logical minimum (-500)
0x26,0xf4,0x01, // Logical maximum (500)
0x35,0x00, // Physical Minimum (0)
0x46,0xff,0x00, // Physical Maximum (255)
0x09,0x30, // Usage(X)
0x09,0x31, // Usage(Y)
0x09,0x32, // Usage(Z)
0x09,0x33, // Usage(RX)
0x09,0x34, // Usage(RY)
0x09,0x35, // //Usage(RZ)
0x75, 0x08, // REPORT_SIZE (16)
0x95, 0x06, // REPORT_COUNT (6)
0x81, 0x02, // INPUT (Data,Var,Abs,Vol)
0xc0, // END_COLLECTION
0xc0 // END_COLLECTION
};
But if I try the same descriptor that my 3D mouse:
__ALIGN_BEGIN static uint8_t HID_MOUSE_ReportDesc[HID_MOUSE_REPORT_DESC_SIZE] __ALIGN_END =
{
0x05, 0x01, // Usage Page (Generic Desktop)
0x09, 0x08, // Usage (Multi-Axis Controller)
0xa1, 0x01, // COLLECTION (Application)
0xa1, 0x00, // Collection (Physical)
0x85, 0x01, // Report ID (1)
0x16,0x0c,0xfe, // Logical minimum (-500)
0x26,0xf4,0x01, // Logical maximum (500)
0x35,0x00,0x80, // Physical Minimum (-32768)
0x46,0xff,0x7f, // Physical Maximum (32767)
0x09,0x30, // Usage(X)
0x09,0x31, // Usage(Y)
0x09,0x32, // Usage(Z)
0x75, 0x10, // REPORT_SIZE (16)
0x95, 0x03, // REPORT_COUNT (3)
0x81, 0x02, // INPUT (Data,Var,Abs,Vol)
0xc0, // END_COLLECTION
0xc0 // END_COLLECTION
};
Windows gives me the same error, and it can't start the device!!!
What is wrong? Do I need a special driver for Windows to send 32 bit data (int32)? For information, I use the HID library for my application PC side.
How can I resolve this?
The LOGICAL_MAXIMUM four-byte descriptor tag (0x27) is only valid up to 0x7FFFFFFF as it is describing a maximum for a signed int data field. If you want to describe an unsigned int data field you would need to use the LOGICAL_MAXIMUM 8 byte descriptor tag like this:
0x28, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00
Your second example would work, I think. Except for the typo for the Physical maximum descriptor tag. It should be 0x36, not 0x35.
When I tried your last descriptor (using my Arduino USBComposite library for STM32F1), Windows gave me an error about the descriptor having an unknown item. But when I changed the 0x35 in the Physical Minimum line to 0x36, Windows recognized the item.
I want to use RTS pin of UART1 to communicate through RS 485 protocol.
I have enabled UART1 through
/media/BEAGLEBONE/uEnv.txt
optargs=quiet drm.debug=7 capemgr.enable_partno=BB-UART1
Device tree overlay snippet:
0x180 0x20 /* uart1_rxd | MODE0 */
0x184 0x20 /* uart1_txd | MODE0 */
0x17c 0x00 /* uart1_rts | MODE0 */
0x178 0x00 /* uart1_cts | MODE0 */
cat /proc/tty/driver/OMAP-SERIAL
serinfo:1.0 driver revision:
0: uart:OMAP UART0 mmio:0x44E09000 irq:72 tx:2818 rx:100 RTS|CTS|DTR|DSR
1: uart:OMAP UART1 mmio:0x48022000 irq:73 tx:0 rx:0 CTS|DSR|CD|RI
How to enable RTS pin on P9.19 by selecting mode 0 ?
The muxing mode of the pins both set to same mode.
Change it to:
0x180 0x20 /* UART1_RXD, INPUT | MODE0 */
0x184 0x00 /* UART1_TXD, OUTPUT | MODE0 */
0x17c 0x00 /*UART1_RTS*/
0x178 0x20 /*UART1_CTS*/
To use the RTS pin send the pin number from the overlay.
rts-gpio = <&gpio0 13 0>
To use the beagleboard xm as an HID peripheral I plan to do the following:
Discover how to build things with angstrom.
Get the kernel source 2.6.32.
Compile omap_udc and g_hid
Insert those modules into the kernel
Compile the example from gadget_hid.txt
Send keyboard commands with hid_gadget_test /dev/hidg0 keyboard
Is that a good way to do what I want?
http://www.edaboard.com/thread145675.html is a somewhat related issue from '09.
Looking for Example Embedded Linux HID Device Code is very similar.
I figured I would post this here because I looked and looked for an answer but to no avail so I had to get creative.
First
Go here and get the Kernel
http://eewiki.net/display/linuxonarm/BeagleBone
Second in
The KERNEL/arch/arm/mach-omap2/board-am335xevm.c
Add:
enter code here
#include <linux/usb/g_hid.h>
/* hid descriptor for a keyboard */
static struct hidg_func_descriptor my_hid_data = {
.subclass = 0, /* No subclass */
.protocol = 1, /* Keyboard */
.report_length = 8,
.report_desc_length = 63,
.report_desc = {
0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
0x09, 0x06, /* USAGE (Keyboard) */
0xa1, 0x01, /* COLLECTION (Application) */
0x05, 0x07, /* USAGE_PAGE (Keyboard) */
0x19, 0xe0, /* USAGE_MINIMUM (Keyboard LeftControl) */
0x29, 0xe7, /* USAGE_MAXIMUM (Keyboard Right GUI) */
0x15, 0x00, /* LOGICAL_MINIMUM (0) */
0x25, 0x01, /* LOGICAL_MAXIMUM (1) */
0x75, 0x01, /* REPORT_SIZE (1) */
0x95, 0x08, /* REPORT_COUNT (8) */
0x81, 0x02, /* INPUT (Data,Var,Abs) */
0x95, 0x01, /* REPORT_COUNT (1) */
0x75, 0x08, /* REPORT_SIZE (8) */
0x81, 0x03, /* INPUT (Cnst,Var,Abs) */
0x95, 0x05, /* REPORT_COUNT (5) */
0x75, 0x01, /* REPORT_SIZE (1) */
0x05, 0x08, /* USAGE_PAGE (LEDs) */
0x19, 0x01, /* USAGE_MINIMUM (Num Lock) */
0x29, 0x05, /* USAGE_MAXIMUM (Kana) */
0x91, 0x02, /* OUTPUT (Data,Var,Abs) */
0x95, 0x01, /* REPORT_COUNT (1) */
0x75, 0x03, /* REPORT_SIZE (3) */
0x91, 0x03, /* OUTPUT (Cnst,Var,Abs) */
0x95, 0x06, /* REPORT_COUNT (6) */
0x75, 0x08, /* REPORT_SIZE (8) */
0x15, 0x00, /* LOGICAL_MINIMUM (0) */
0x25, 0x65, /* LOGICAL_MAXIMUM (101) */
0x05, 0x07, /* USAGE_PAGE (Keyboard) */
0x19, 0x00, /* USAGE_MINIMUM (Reserved) */
0x29, 0x65, /* USAGE_MAXIMUM (Keyboard Application) */
0x81, 0x00, /* INPUT (Data,Ary,Abs) */
0xc0 /* END_COLLECTION */
}
};
static struct platform_device my_hid = {
.name = "hidg",
.id = 0,
.num_resources = 0,
.resource = 0,
.dev = {
.platform_data = &my_hid_data,
},
};
static void __init am33xx_hidg_init(void)
{
int ret;
ret = platform_device_register(&my_hid);
if (ret)
printk("HID Gadget registration failed\n");
}
In the:
static void __init am335x_evm_init(void)
{
am33xx_cpuidle_init();
am33xx_mux_init(board_mux);
omap_serial_init();
am335x_rtc_init();
**am33xx_hidg_init();**
clkout2_enable();
}
Build the kernel following the Guide from earlier
In the makemenu config section of the kernel build
go to the device drivers->usb support-> USB Gadget Support-> USB Gadget Drivers -> Compile HID Gadget as Module ( you may have to hunt for it but it's around this section in a couple more sub menus)
Take the sample code section from the kernel documentation
or this page http://www.mjmwired.net/kernel/Documentation/usb/gadget_hid.txt
Compile with GCC
insmod the g_hid.ko driver
and then run the compiled sample code