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Hi, I am developing a firmware for EZUSB FX based board. I am facing a small problem. I am not able to initialize a Global variable in my firmware. Even though I assign the global variable with 0 initial value, But the variable does not take that value. I am using SMALL memory model for my development. my declerations looks like this :- BYTE GlobalCount = 0; and in my sof() I am using this variable and updating it and reusing it again in next sof(). Please advise .. Rahul Gupta
Reduce your code to the minimum complete program that exhibits the problem then post it here. Until then we are fishing in the dark.
here is the code ..
//FW.C #include "ezusb.h" #include "ezregs.h" //----------------------------------------------------------------------------- // Global Variables /----------------------------------------------------------------------------- volatile BOOL GotSUD; BOOL Rwuen; BOOL Selfpwr; volatile BOOL Sleep; WORD pDeviceDscr; // Pointer to Device Descriptor; Descriptors may be moved WORD pConfigDscr; WORD pStringDscr; extern BYTE glbCntW; // Code -- // Task dispatcher void main(void) { DWORD i; WORD offset; DWORD DevDescrLen; DWORD j=0; WORD IntDescrAddr; WORD ExtDescrAddr; Sleep = FALSE; Rwuen = FALSE; Selfpwr = FALSE; GotSUD = FALSE; // Initialize user device TD_Init(); pDeviceDscr = (WORD)&DeviceDscr; pConfigDscr = (WORD)&ConfigDscr; pStringDscr = (WORD)&StringDscr; if ((WORD)&DeviceDscr & 0xe000) { IntDescrAddr = INTERNAL_DSCR_ADDR; ExtDescrAddr = (WORD)&DeviceDscr; DevDescrLen = (WORD)&UserDscr - (WORD)&DeviceDscr + 2; for (i = 0; i < DevDescrLen; i++) *((BYTE xdata *)IntDescrAddr+i) = 0xCD; for (i = 0; i < DevDescrLen; i++) *((BYTE xdata *)IntDescrAddr+i) = *((BYTE xdata *)ExtDescrAddr+i); pDeviceDscr = IntDescrAddr; offset = (WORD)&DeviceDscr - INTERNAL_DSCR_ADDR; pConfigDscr -= offset; pStringDscr -= offset; } EZUSB_IRQ_ENABLE(); // Enable USB interrupt (INT2) EZUSB_ENABLE_RSMIRQ(); PORTCCFG |= 0xc0; USBBAV = USBBAV | 1 & ~bmBREAK; USBIEN |= bmSUDAV | bmSUTOK | bmSUSP | bmURES; EA = 1; #ifndef NO_RENUM EZUSB_Discon(TRUE); // Renumerate #endif CKCON = (CKCON&(~bmSTRETCH)) | FW_STRETCH_VALUE; // Set stretch to 0 (after renumeration) // Task Dispatcher while(TRUE) // Main Loop { if(GotSUD) // Wait for SUDAV { SetupCommand(); // Implement setup command GotSUD = FALSE; // Clear SUDAV flag } if (Sleep) { if(TD_Suspend()) { Sleep = FALSE; do { EZUSB_Susp(); } while(!Rwuen && EZUSB_EXTWAKEUP()); EZUSB_Resume(); // If source is the Wakeup# pin, signal the host to Resume. TD_Resume(); } } TD_Poll(); } } void SetupCommand(void) { void *dscr_ptr; DWORD i; switch(SETUPDAT[1]) { case SC_GET_DESCRIPTOR: if(DR_GetDescriptor()) switch(SETUPDAT[3]) { case GD_DEVICE: SUDPTRH = MSB(pDeviceDscr); SUDPTRL = LSB(pDeviceDscr); break; case GD_CONFIGURATION: // Configuration if(dscr_ptr = (void *)EZUSB_GetConfigDscr(SETUPDAT[2])) { SUDPTRH = MSB(dscr_ptr); SUDPTRL = LSB(dscr_ptr); } else EZUSB_STALL_EP0(); // Stall End Point 0 break; case GD_STRING: // String if(dscr_ptr = (void *)EZUSB_GetStringDscr(SETUPDAT[2])) { STRINGDSCR *sdp; BYTE len; sdp = dscr_ptr; len = sdp->length; if (len > SETUPDAT[6]) len = SETUPDAT[6]; //limit to the requested length while (len) { for(i=0; i<min(len,64); i++) *(IN0BUF+i) = *((BYTE xdata *)sdp+i); //set length and arm Endpoint EZUSB_SET_EP_BYTES(IN0BUF_ID,min(len,64)); len -= min(len,64); (BYTE *)sdp += 64; // Wait for it to go out (Rev C and above) while(EP0CS & 0x04) ; } EZUSB_SET_EP_BYTES(IN0BUF_ID,0); EP0CS = bmHS; } else EZUSB_STALL_EP0(); // Stall End Point 0 break; default: // Invalid request EZUSB_STALL_EP0(); // Stall End Point 0 } break; case SC_GET_INTERFACE: // *** Get Interface DR_GetInterface(); break; case SC_SET_INTERFACE: // *** Set Interface DR_SetInterface(); break; case SC_SET_CONFIGURATION: // *** Set Configuration DR_SetConfiguration(); break; case SC_GET_CONFIGURATION: // *** Get Configuration DR_GetConfiguration(); break; case SC_GET_STATUS: // *** Get Status if(DR_GetStatus()) switch(SETUPDAT[0]) { case GS_DEVICE: // Device IN0BUF[0] = ((BYTE)Rwuen << 1) | (BYTE)Selfpwr; IN0BUF[1] = 0; EZUSB_SET_EP_BYTES(IN0BUF_ID,2); break; case GS_INTERFACE: // Interface IN0BUF[0] = 0; IN0BUF[1] = 0; EZUSB_SET_EP_BYTES(IN0BUF_ID,2); break; case GS_ENDPOINT: // End Point IN0BUF[0] = EPIO[EPID(SETUPDAT[4])].cntrl & bmEPSTALL; IN0BUF[1] = 0; EZUSB_SET_EP_BYTES(IN0BUF_ID,2); break; default: // Invalid Command EZUSB_STALL_EP0(); // Stall End Point 0 } break; case SC_CLEAR_FEATURE: // *** Clear Feature if(DR_ClearFeature()) switch(SETUPDAT[0]) { case FT_DEVICE: // Device if(SETUPDAT[2] == 1) Rwuen = FALSE; // Disable Remote Wakeup else EZUSB_STALL_EP0(); // Stall End Point 0 break; case FT_ENDPOINT: // End Point if(SETUPDAT[2] == 0) { EZUSB_UNSTALL_EP( EPID(SETUPDAT[4]) ); EZUSB_RESET_DATA_TOGGLE( SETUPDAT[4] ); } else EZUSB_STALL_EP0(); // Stall End Point 0 break; } break; case SC_SET_FEATURE: // *** Set Feature if(DR_SetFeature()) switch(SETUPDAT[0]) { case FT_DEVICE: // Device if(SETUPDAT[2] == 1) Rwuen = TRUE; // Enable Remote Wakeup else EZUSB_STALL_EP0(); // Stall End Point 0 break; case FT_ENDPOINT: // End Point if(SETUPDAT[2] == 0) EZUSB_STALL_EP( EPID(SETUPDAT[4]) ); else EZUSB_STALL_EP0(); // Stall End Point 0 break; } break; default: if(DR_VendorCmnd()) EZUSB_STALL_EP0(); } // Acknowledge handshake phase of device request // Required for rev C does not effect rev B EP0CS |= bmBIT1; } void resume_isr(void) interrupt WKUP_VECT { EZUSB_CLEAR_RSMIRQ(); }
#pragma NOIV // Do not generate interrupt vectors #include <ezusb.h> #include <ezregs.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #define DCM_SIZE 64 #define XBYTE ((unsigned char volatile xdata*) 0) extern BOOL GotSUD; extern BOOL Sleep; extern BOOL Rwuen; extern BOOL Selfpwr; BYTE Configuration; BYTE AlternateSetting; volatile BYTE glbISOCnt =0 ; volatile BYTE glbCnt=0; static BYTE glbCntW = 0; volatile BYTE iso_out_cnt =0; unsigned char *pBuffer; unsigned char *CntBuf; //----------------------------------------------------------------------------- // Task Dispatcher hooks //----------------------------------------------------------------------------- void TD_Init(void) // Called once at startup { USBIEN |= bmSOF + bmURES; INISOVAL = bmEP8; //+bmEP9; OUTISOVAL = bmEP8; IN8ADDR = 0x50; OUT8ADDR = 0x00; } void TD_Poll(void) // Called repeatedly while the device is idle { } BOOL TD_Suspend(void) // Called before the device goes into suspend mode { return(TRUE); } BOOL TD_Resume(void) // Called after the device resumes { return(TRUE); } //----------------------------------------------------------------------------- // Device Request hooks // The following hooks are called by the end point 0 device request parser. //----------------------------------------------------------------------------- BOOL DR_GetDescriptor(void) { return(TRUE); } BOOL DR_SetConfiguration(void) // Called when a Set Configuration command is received { Configuration = SETUPDAT[2]; return(TRUE); // Handled by user code } BOOL DR_GetConfiguration(void) // Called when a Get Configuration command is received { IN0BUF[0] = Configuration; EZUSB_SET_EP_BYTES(IN0BUF_ID,1); return(TRUE); // Handled by user code } BOOL DR_SetInterface(void) // Called when a Set Interface command is received { AlternateSetting = SETUPDAT[2]; return(TRUE); // Handled by user code } BOOL DR_GetInterface(void) // Called when a Set Interface command is received { IN0BUF[0] = AlternateSetting; EZUSB_SET_EP_BYTES(IN0BUF_ID,1); return(TRUE); // Handled by user code } BOOL DR_GetStatus(void) { return(TRUE); } BOOL DR_ClearFeature(void) { return(TRUE); } BOOL DR_SetFeature(void) { return(TRUE); } BOOL DR_VendorCmnd(void) { return(FALSE); } //----------------------------------------------------------------------------- // USB Interrupt Handlers // The following functions are called by the USB interrupt jump table. //----------------------------------------------------------------------------- // Setup Data Available Interrupt Handler void ISR_Sudav(void) interrupt 0 { GotSUD = TRUE; // Set flag EZUSB_IRQ_CLEAR(); USBIRQ = bmSUDAV; // Clear SUDAV IRQ } // Setup Token Interrupt Handler void ISR_Sutok(void) interrupt 0 { EZUSB_IRQ_CLEAR(); USBIRQ = bmSUTOK; // Clear SUTOK IRQ } void ISR_Sof(void) interrupt 0 { BYTE i = 0; BYTE h = 0 , l = 0; iso_out_cnt = 0; h = OUT8BCH; l = OUT8BCL; if (l) { iso_out_cnt = (WORD) h; iso_out_cnt <<= 8; iso_out_cnt += l; } iso_out_cnt = OUT8BCL; if (iso_out_cnt > 0) { glbISOCnt = iso_out_cnt; } if (iso_out_cnt) { } else { for (i=0;i<glbISOCnt;i++) { IN8DATA = glbCntW; } glbCntW = glbCntW + glbISOCnt; if (glbCntW == glbISOCnt * 4) { glbCntW = 0; } } EZUSB_IRQ_CLEAR(); USBIRQ = bmSOF; // Clear SOF IRQ } void ISR_Ures(void) interrupt 0 { EZUSB_IRQ_CLEAR(); USBIRQ = bmURES; // Clear URES IRQ } void ISR_Susp(void) interrupt 0 { Sleep = TRUE; EZUSB_IRQ_CLEAR(); USBIRQ = bmSUSP; } Along with these 2 files I am including ezusb.lib, USBJMP.obj, STATUP.A51, INIT.A51(provided by cypress). Rahul
///////Periph.c #pragma NOIV // Do not generate interrupt vectors #include <ezusb.h> #include <ezregs.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #define DCM_SIZE 64 #define XBYTE ((unsigned char volatile xdata*) 0) extern BOOL GotSUD; extern BOOL Sleep; extern BOOL Rwuen; extern BOOL Selfpwr; BYTE Configuration; BYTE AlternateSetting; volatile BYTE glbISOCnt =0 ; volatile BYTE glbCnt=0; static BYTE glbCntW = 0; volatile BYTE iso_out_cnt =0; unsigned char *pBuffer; unsigned char *CntBuf; //----------------------------------------------------------------------------- // Task Dispatcher hooks //----------------------------------------------------------------------------- void TD_Init(void) // Called once at startup { USBIEN |= bmSOF + bmURES; INISOVAL = bmEP8; //+bmEP9; OUTISOVAL = bmEP8; IN8ADDR = 0x50; OUT8ADDR = 0x00; } void TD_Poll(void) // Called repeatedly while the device is idle { } BOOL TD_Suspend(void) // Called before the device goes into suspend mode { return(TRUE); } BOOL TD_Resume(void) // Called after the device resumes { return(TRUE); } //----------------------------------------------------------------------------- // Device Request hooks // The following hooks are called by the end point 0 device request parser. //----------------------------------------------------------------------------- BOOL DR_GetDescriptor(void) { return(TRUE); } BOOL DR_SetConfiguration(void) // Called when a Set Configuration command is received { Configuration = SETUPDAT[2]; return(TRUE); // Handled by user code } BOOL DR_GetConfiguration(void) // Called when a Get Configuration command is received { IN0BUF[0] = Configuration; EZUSB_SET_EP_BYTES(IN0BUF_ID,1); return(TRUE); // Handled by user code } BOOL DR_SetInterface(void) // Called when a Set Interface command is received { AlternateSetting = SETUPDAT[2]; return(TRUE); // Handled by user code } BOOL DR_GetInterface(void) // Called when a Set Interface command is received { IN0BUF[0] = AlternateSetting; EZUSB_SET_EP_BYTES(IN0BUF_ID,1); return(TRUE); // Handled by user code } BOOL DR_GetStatus(void) { return(TRUE); } BOOL DR_ClearFeature(void) { return(TRUE); } BOOL DR_SetFeature(void) { return(TRUE); } BOOL DR_VendorCmnd(void) { return(FALSE); } //----------------------------------------------------------------------------- // USB Interrupt Handlers // The following functions are called by the USB interrupt jump table. //----------------------------------------------------------------------------- // Setup Data Available Interrupt Handler void ISR_Sudav(void) interrupt 0 { GotSUD = TRUE; // Set flag EZUSB_IRQ_CLEAR(); USBIRQ = bmSUDAV; // Clear SUDAV IRQ } // Setup Token Interrupt Handler void ISR_Sutok(void) interrupt 0 { EZUSB_IRQ_CLEAR(); USBIRQ = bmSUTOK; // Clear SUTOK IRQ } void ISR_Sof(void) interrupt 0 { BYTE i = 0; BYTE h = 0 , l = 0; iso_out_cnt = 0; h = OUT8BCH; l = OUT8BCL; if (l) { iso_out_cnt = (WORD) h; iso_out_cnt <<= 8; iso_out_cnt += l; } iso_out_cnt = OUT8BCL; if (iso_out_cnt > 0) { glbISOCnt = iso_out_cnt; } if (iso_out_cnt) { } else { for (i=0;i<glbISOCnt;i++) { IN8DATA = glbCntW; } glbCntW = glbCntW + glbISOCnt; if (glbCntW == glbISOCnt * 4) { glbCntW = 0; } } EZUSB_IRQ_CLEAR(); USBIRQ = bmSOF; // Clear SOF IRQ } void ISR_Ures(void) interrupt 0 { EZUSB_IRQ_CLEAR(); USBIRQ = bmURES; // Clear URES IRQ } void ISR_Susp(void) interrupt 0 { Sleep = TRUE; EZUSB_IRQ_CLEAR(); USBIRQ = bmSUSP; } Along with these 2 files I am including ezusb.lib, USBJMP.obj, STATUP.A51, INIT.A51(provided by cypress). Rahul