Hello all
I am Raju Kamal, a Student from University of offenburg, Germany. Now I am faceing a problem to implement the USB-CDC protocal by using MAX3420e interface with our Microprocessor. Can any body send me the c source code for MAX3420e for USB-CDC. It will be gratefull from me!!!
Best regards Raju Kamal
// Possible Interrupts for our application: // a. Setup Data arrived (SUDAVIRQ). // b. The host requested keyboard data by sending a data request to EP3-IN. // c. The host suspended the bus by stopping traffic for three milliseconds. // d. The host initiated a bus reset. // e. The host completed bus reset signaling. // Poll the Interrupt line from the USB-Max-Chip // --> Later it should work automtically in a Interrupt-Service-Routine //BYTE MAX_Int_Pending(void) //{ //return (BYTE)((USB_CYPRESSFLAG&0x01)==1); // USB_Cypressflag=1 --> true //} // *********************************** // // Interrupt Service Requests // *********************************** // // This function checks 4 IRQ bits // 1. bmSUDAVIRQ A SETUP packet arrived. // The host controls a device by sending SETUP packets. // 2. bmIN3BAVIRQ The host asked for another data packet from the HID keyboard. // It uses endpoint 3-IN for this request. BAV means Buffer Available. // 3. bmURESIRQ The host started signaling a bus reset. // 4. bmUSBRESDNIRQ The host finished signaling a bus reset //void _service_irqs(void) void _service_irqs(void) { // Read out the two IRQ-Register and save the result in variables BYTE itest1,itest2; itest1 = rreg(rEPIRQ); // Check the EPIRQ bits itest2 = rreg(rUSBIRQ); // Check the USBIRQ bits // // Debug it // beep(45,46); // Debug-AHI-Ton // USB_writeln("itest1="); // showByte(itest1); // USB_writeln("itest2="); // showByte(itest2); // USB_writeln("\n\r\0"); if(itest1 & bmSUDAVIRQ) // Check for SETUP data { // beep(45,46); // Debug-AHI-Ton wreg(rEPIRQ,bmSUDAVIRQ); // clear the SUDAV IRQ _USBmax3420E_ENUM(); } if(itest1 & bmIN3BAVIRQ) // Was an EP3-IN packet just dispatched to the host? { // do_IN3(); // Yes--load another keystroke and arm the endpoint } // NOTE: don't clear the IN3BAVIRQ bit here--loading the EP3-IN byte // count register in the do_IN3() function does it. if((configval != 0) && (itest2&bmSUSPIRQ)) // HOST suspended bus for 3 msec { wreg(rUSBIRQ,(bmSUSPIRQ+bmBUSACTIRQ)); // clear the IRQ and bus activity IRQ // L2_ON // turn on the SUSPEND light // L3_OFF // turn off blinking light (in case it's on) Suspended=1; // signal the main loop } // The last two checks handle USB bus reset. These code sections clear the // IRQ bits and turn a bus reset light on and off. Note that MAX3420E code // should always include a test for a USB bus reset. This is because the // MAX3420E clears most of its interrupt enable register bits during a USB bus // reset. Therefore, the code should be alert to a bus reset. When the reset is // complete (signaled by the USBRESDN IRQ), it should re-enable the interrupts // that it is using for the application. if(rreg(rUSBIRQ)& bmURESIRQ) { // USB_writeln("Clear URESIRQ\n\0"); wreg(rUSBIRQ,bmURESIRQ); // clear the IRQ } if(rreg(rUSBIRQ) & bmURESDNIRQ) { // USB_writeln("Clear URESDNIRQ\n\0"); wreg(rUSBIRQ,bmURESDNIRQ); // clear the IRQ bit // Suspended=0; // in case we were suspended //ENABLE_IRQS // ...because a bus reset clears the IE bits wreg(rEPIEN,(bmSUDAVIE+bmIN3BAVIE)); wreg(rUSBIEN,(bmURESIE+bmURESDNIE)); } }
// ********************************************************* // // ****************** SPI - Routinen *********************** // // ********************************************************* // // ------------------------------------------------------------ // The code below customizes this app for the SIRIUS-uC-System // microprocessor and the Rowley compiler. Only this // section changes if you use a different uP and/or compiler. // ------------------------------------------------------------ // ************************************************************************** // // First byte of every SPI transfer is a command byte like following format: // ---------------------------------------- // | b7 | b6 | b5 | b4 | b3 | b2 | b1 | b0 | // ---------------------------------------- // |Reg4|Reg3|Reg2|Reg1|Reg0| 0 |DIR |ACK | // ---------------------------------------- // Bit7 to 3 = Register Address // Bit1 = Direction (DIR=0=Read ; DIR=1=Write) // Bit0 = ACKSTAT bit in R9 // ************************************************************************** // // Liest ueber den SPI-Bus ein Register des Max-USB-Chips aus BYTE rreg(BYTE reg) { BYTE dum; // putport(0x3E, 0x66); putport(SPI_SIRIUS_PORT_STEUER,0x03); // Set CS2=0 writeSPI(reg); // Set on USB-Max-Chip the reg number w. dir=0 (IN) dum = readSPI(); // Read the register value putport(SPI_SIRIUS_PORT_STEUER,0x07); // Set CS2=1 return(dum); } // Schreibt ueber den SPI-Bus ein Register des Max-USB-Chips void wreg(BYTE reg, BYTE dat) { putport(SPI_SIRIUS_PORT_STEUER,0x03); // 0000_0011 --> Mode0 , CS2=0 reg = reg+2; // Write-Bit = +2 writeSPI(reg); // Send the register-number with the DIR bit (b1) set to WRITE writeSPI(dat); // Send the data to the register putport(SPI_SIRIUS_PORT_STEUER,0x07); // Set CS2 high } // Liest ueber den SPI-Bus ein Register des Max-USB-Chips aus. // Das ACKSTAT-Bit wird im Commando-Byte gesetzt BYTE rregAS(BYTE reg) { BYTE dum; putport(SPI_SIRIUS_PORT_STEUER,0x03); // Set CS2=0 writeSPI(reg+1); // Reg number with dir=0 (IN) and ACKSTAT=1 dum = readSPI(); // Read the register value putport(SPI_SIRIUS_PORT_STEUER,0x07); // Set CS2=1 return(dum); } // Schreibt ueber den SPI-Bus ein Register des Max-USB-Chips void wregAS(BYTE reg, BYTE dat) { putport(SPI_SIRIUS_PORT_STEUER,0x03); // 0000_0011 --> Mode0 , CS2=0 reg = reg+3; // Write-Bit und Ack-Bit = +3 writeSPI(reg); // Reg number with DIR=1 (write) and ACKSTAT=1 writeSPI(dat); // Send the data to the register putport(SPI_SIRIUS_PORT_STEUER,0x07) ; // Set CS2 high } // Liest N-Bytes ueber den SPI-Bus eines Register des Max-USB-Chips aus. void readbytes(BYTE reg, BYTE N, BYTE *p) { BYTE j; putport(SPI_SIRIUS_PORT_STEUER,0x03); // 0000_0011 --> Mode0 , CS2=0 writeSPI(reg); // Write-Bit b1=0 to command a read operation // Read-Loop for(j=0; j<N; j++) { *p = readSPI(); // Store it in the data array p++; // Bump the pointer } putport(SPI_SIRIUS_PORT_STEUER,0x07); // Set CS2 high } // Schreibt N-Bytes ueber den SPI-Bus eines Register des Max-USB-Chips. void writebytes(BYTE reg, BYTE N, BYTE *p) { BYTE j,wd; putport(SPI_SIRIUS_PORT_STEUER,0x03); // 0000_0011 --> Mode0 , CS2=0 writeSPI( reg+2); // write bit b1=1 to command a write operation // Writes N Bytes for(j=0; j<N; j++) { wd = *p; // write the array value // showbyte(wd); writeSPI(wd); // write the byte from the array position p++; // Bump the pointer } putport(SPI_SIRIUS_PORT_STEUER,0x07); // Set CS2 high } // Zeigt ueber den intern FPGA-integrierten USB-Controller ein Byte im USB-COM an void showByte(char Byte) { int i; char x; char *e={"00\0"}; for(i=1;i>=0;i--) { x=(Byte&0xF); Byte=Byte>>4; if(x<10) e[i]=x+0x30; else e[i]=x+0x41-10; } USB_writeln(e); } //Word in HEX ausgeben void showword(U16 Word) { int i; U08 x; char *e={"0000\0"}; for(i=3;i>=0;i--) { x=(Word&0xF); Word=Word>>4; if(x<10) e[i]=x+0x30; else e[i]=x+0x41-10; } USB_writeln(e); } void check_for_resume(void) { // SPI_ini(0); // USB_CSE; putport(SPI_SIRIUS_PORT_STEUER,0x03); if(rreg(rUSBIRQ) & bmBUSACTIRQ) // THE HOST RESUMED BUS TRAFFIC Suspended=0; // no longer suspended // USB_CSD; putport(SPI_SIRIUS_PORT_STEUER,0x07); }
void USB_writeln2(char *name) { int g; // namelength = sizeof(name); // so we can check for the end of the message // showByte(namelength); // while(USB_Max_EP3_flag==0) {} // wait for an interrupt which set the flag //beep(0x55,0x55); for(g=0; g < 64; g++) { // USB_writeln("test"); if (name[g]==0) // Strings are 0 terminated //wreg( rEP1OUTFIFO,0); // Rest of the bytes are 0 wreg(rEP2INFIFO,0); else //wreg(rEP1OUTFIFO,name[g]); wreg(rEP2INFIFO,name[g]); // Load the string (64 times) // wreg( rEP1OUTFIFO,0x2); } wreg(rEP2INBC,64); // wreg( rEP1OUTBC,64);
First i would like to say sorry because of some miscommunication and some bad posting. Now whatever i have send is my code, some of them i have found from this forum and some from maxim. As well as i also need to change some to compatible with our compiler.
So Now i am faceing a problem for writing by the usb. For my project i need to use the hyperterminal com. for coummincation i am using Docklight Scripting software. the final position is now if i send any data by the docklight or windows hyperterminal, it shows me transfer data but does not show receiving data. If it is still confuse please inform me i will try to explain it more.
my problem is now i can read but cannot write
the final position is now if i send any data by the docklight or windows hyperterminal, it shows me transfer data but does not show receiving data.
The above statements are very confusing to me.
I don't know much about this, but normally, you should use an USB Analyzer to analyze what happens during the USB communication.
A. USB Host to USB device -> OK. USB device to USB Host -> Failed.
B. USB Host to USB device -> Failed. USB device to USB Host -> OK.
Your problem is A or B? How do you know/confirm that, it is OK/Failed?
Did you put a breakpoint at the beginning of the USB ISR to see what happens?
Does anybody get the idea what is the problem?? My communication between PC (host) to usb is ok but USB to PC (host) is not ok. For CDC shall i need to use the endpoint2 for Output? The last function "void USB_writeln2" use for writing. here i use Endpoint2, is it ok? i also check with other Endpoint but its remain same no improvement.
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"A. USB Host to USB device -> OK. USB device to USB Host -> Failed.
Your problem is A or B?" My problem is A. My "USB device to USB host is not ok". I have checked with USB analyzer and found USB Host to USB device is ok but the other direction is not ok!! I have also used some break point for debugging. can you tell me how can do the "bulk transfer". So far i understand there is a interrupt transfer and bulk transfer. i need to know about the bulk transfer. If it is still confuse i can write my testing procedure in details.
I don't know much about USB/USBCDC. And I am not familiar with your MCU and your USB solution (Library/Source Code).
But I think/guess that, for most USBCDC device, the Data Flow for sending data from Device to Host (Bulk-In) is:
1. Host polls Device regularly. 2. The USB ISR of the device handles such a polling. (USB frame interrupt handler) 3. The USB ISR of the device puts data into Bulk-In EP. (USB frame interrupt handler) 4. When Bulk-In EP finishes the data sending, another interrupt triggered. (Interrupt driven data sending) 5. The USB ISR of the device handles the next Bulk-In. (USB Bulk-In interrupt handler) It puts more data into Bulk-In EP. (Go to Step 4)
With the USB Analyzer, did you see some regular IN-Packets? How did you respond to such a IN-Packet?
-> With the USB Analyzer, did you see some regular IN-Packets? How did you respond to such a IN-Packet? <-
The above question is incorrect.
It should be:
With the USB Analyzer, did you see some regular IN-NAKs?
With the USB Analyzer, could you see your Endpoint Descriptor of the Bulk-In EP?