syau@aludra.usc.edu (Shu-Jye Syau) (04/10/91)
Hi :
I am trying to use MS window to write a voice card program .
I need to know how to set the interrupt vector for hardware interrupt .
( when voice comes in , ADC interrupt PC to info PC to get 8-bit data)
Please Help .
It is BETTER if you can send reply to me , THANKS .
scott
syau@aludra.usc.eduiam@waikato.ac.nz (Ian McDonald) (04/16/91)
In article <16489@chaph.usc.edu>, syau@aludra.usc.edu (Shu-Jye Syau) writes: > Hi : > I am trying to use MS window to write a voice card program . > I need to know how to set the interrupt vector for hardware interrupt . > ( when voice comes in , ADC interrupt PC to info PC to get 8-bit data) > Please Help . > Below is the code I used to set up vectors. I am using mine for a voice card as well - A Scott Instruments board. Sorry I couln't reply by EMail - I have no priveledge to do that. /* winvect.c */ /* A replacement for Microsoft's routines which are not in Windows libraries History iam 08 Jan 91 Created */ #include <windows.h> #include "winvect.h" void(_interrupt _far *_dos_getvect(unsigned intnum))() { void _far *vect; /* Dos function 35 is Get vector function. Specify the interrupt in al and the vector will be returned in es:bx */ _asm { mov ax,intnum mov ah,35h int 21h mov vect+2,es mov vect,bx } return(vect); } void _dos_setvect(unsigned intnum,void(_interrupt _far *handler)()) { /* Dos function 25 is set vector. Put interrupt number in al, vector in ds:dx */ _asm { push ds mov ax,intnum mov ah,25h lds dx,handler int 21h pop ds } } -- ------------------------------------------------------------------------- Ian McDonald | 52 Cook Street| / /\ /\ Hamilton | This space free for advertising !! / / \/ \ New Zealand | / / \ +64-71-563438 | I can receive mail but can't reply to it.
iam@waikato.ac.nz (Ian McDonald) (04/26/91)
>From: IN%"syau%aludra.usc.edu@usc.edu" 19-APR-1991 15:36:07.84 >To: iam@waikato.ac.nz >CC: >Subj: Ms win3.0 and interrupt >Hi : > Thanks for your reply on my message . some questions . > Do you have to use assembly , can't I just use MS C 6.0 to write the > _dos_setvect(int_num , int_handle) ; I never succeeded :-( > Because I design the hardware by myself , and it works not bad under DOS . > I use IRQ2 to do interrupt request , so the int_num here under DOS is > 0x0a , how about in Win3.0 , can I do the same way ? I presume so. > > And IS it possible I can get the source code from you , then I can > entirely understand how you use your voice card . I need that . At the end of the message I have posted the install, deinstall and the interrupt routine itself. > If you can't e-mail me , would you please post to >comp.windows.ms.programmer , I will check that group . Thanks . OK. Here it is. Sorry about the delay >scott >USC >syau@aludra.usc.edu /*============================================================================ ; ; name: initaudio ; ; function: installs a new SRB interrupt vector to service ; these digital audio routines ; ; arguments: none ; ; returns: returns zero if successful, or an AIR error code otherwise ; ;===========================================================================*/ #define I8259_CTL_REG 0x20 /* i/o address of 8259 control reg */ #define I8259_MASK_REG 0x21 /* i/o address of 8259 mask reg */ #define EOI 0x20 /* End of Interrupt to 8259 */ #define IDLE 0 /* audio status when no cmd in progress */ static unsigned char far* * buflist_ptr; /* ptr to array of far buf ptrs */ static long* buflen_ptr; /* ptr to array of buf lens */ static long bufposn; /* index of current pos in curr buf */ static int numbufs; /* number of buffers */ static int bufnum; /* index of current audio buffer */ static unsigned int_number=0; /* interrupt number */ static void (interrupt far * old_intvect)(); static int aud_status; /* 0: off; PLAY, IRCD */ static unsigned short imaskbit; /* state of my bit in 8259 int mask */ static HANDLE *handle_ptr; static unsigned char far *data_ptr; static char audio_filename[MAX_FILENAME_LENGTH]; static Disk_Buffer_Type DiskBuffer[2]; static short act_disk_buf; static BOOL finishing; static BOOL buffers_locked; static HWND hCommandWnd; static WORD swap_buf_id,end_file_id; long audio_file_length; long current_posn; unsigned int initaudio(void) /* install audio interrupt vector */ { unsigned short imask, pat, i, len; if (srb_active < 0) return(AIR_SRBE_NOTOPEN); if ((srb_interrupt_num < 0x0B) || (srb_interrupt_num > 0x0F)) return(AIR_SRBE_INVINTR); /* invalid interrupt number */ if (int_number != 0) return AIR_RAP_VECTOR; /* interrupt vector already installed */ #if 0 if (_dos_getvect(srb_interrupt_num) == audioint) return AIR_RAP_VECTOR; /* interrupt vector already installed */ #endif int_number = srb_interrupt_num; /* save interrupt number */ old_intvect = _dos_getvect(int_number); /* save old vector */ _dos_setvect(int_number, audioint); /* install the new vector */ pat = 0x01 << (int_number - 0x08); /* construct mask for intr num */ imask = inp(I8259_MASK_REG); /* get current 8259 interrupt mask */ imaskbit = imask & pat; /* state of mask bit for intr num */ imask &= (~pat); /* make new interrupt mask */ outp(I8259_MASK_REG, imask); /* write new mask to 8259 */ return(0); } /**/ /*============================================================================ ; ; name: termaudio ; ; function: uninstalls the vector installed by initaudio() ; and restores the previous vector ; ; arguments: none ; ; returns: returns zero if successful, or an AIR error code otherwise ; ;===========================================================================*/ unsigned int termaudio() /* restore prev interrupt vector */ { unsigned short imask; unsigned long s_killaudio(); if (s_audiostatus()) s_killaudio(); /* make sure no play/rec is in progress */ if (int_number == 0) return AIR_RAP_VECTOR; /* interrupt vector not installed */ #if 0 if (_dos_getvect(int_number) != audioint) return AIR_RAP_VECTOR; /* interrupt vector not installed */ #endif imask = inp(I8259_MASK_REG); /* get current interrupt mask */ imask |= imaskbit; /* restore prev mask bit */ outp(I8259_MASK_REG,imask); _dos_setvect(int_number, old_intvect); int_number = 0; return(0); } /*============================================================================ ; ; name: win_int ; ; function: interrupt service routine that deals with interrupts from ; SRB requesting more data for PLAY, or ; signaling a full buffer available for RECORD. ; ; arguments: none ; ; returns: none ; ;===========================================================================*/ #pragma check_stack(off) void interrupt far win_int() { long bytes_rem; long srb_buflen; unsigned short words_rem; unsigned short srb_bufaddr; unsigned short srbctl, srbstat; srbstat = rd_srb_statreg(); /* read SRB status reg */ srbctl = rd_srb_ctlreg(); /* get last value written to SRB ctl reg */ srbctl &= ~BIOHI; /* reset BIO to keep TMS from writing to port 0 */ srbctl &= ~PROG; /* make sure data memory is selected */ wr_srb_ctlreg(srbctl); /* write SRB control register */ srb_buflen = contab.adbl << 1; /* srb buf len in bytes */ bytes_rem = DiskBuffer[act_disk_buf].length - bufposn; /* no. bytes left in curr buf */ if (getword(contab.hshk) == 1) /* index of srb buf */ srb_bufaddr = contab.adb1; else srb_bufaddr = contab.adb0; if (aud_status==PLAY && finishing && bytes_rem < srb_buflen) { /*-------------------------------- finished ---------------------------------*/ srbctl &= ~ENAIAW; /* disable SRB interrupts */ wr_srb_ctlreg(srbctl); srb_post(STOP); /* tell SRB to terminate audio */ // if (callback != NULL) { // (*callback)(); // } PostMessage(hCommandWnd,WM_COMMAND,end_file_id,0L); aud_status = IDLE; } else { if (bytes_rem >= srb_buflen) { /* enough bytes left in current buffer to fill srb buf */ if (aud_status == PLAY) fputbytes(DiskBuffer[act_disk_buf].lptr+bufposn,srb_bufaddr,contab.adbl); else fgetbytes(srb_bufaddr,contab.adbl,DiskBuffer[act_disk_buf].lptr + bufposn); bufposn += srb_buflen; } else { /* not enough bytes left in current buffer to fill srb buf */ words_rem = bytes_rem / 2; /* no. words left in current buf */ if (aud_status == PLAY) { fputbytes(DiskBuffer[act_disk_buf].lptr + bufposn,srb_bufaddr,words_rem); current_posn+=DiskBuffer[act_disk_buf].length; act_disk_buf=!act_disk_buf; /* incr index to next audio buf */ srb_bufaddr = srb_bufaddr + words_rem; /* point to curr pos in srb buf */ words_rem = contab.adbl - words_rem; /* no. words left in srb_buf */ fputbytes(DiskBuffer[act_disk_buf].lptr,srb_bufaddr,words_rem); PostMessage(hCommandWnd,WM_COMMAND,swap_buf_id,0L); // if(diskproc!=NULL) { // (*diskproc)(); // } } else { /* assume record */ fgetbytes(srb_bufaddr,words_rem,DiskBuffer[act_disk_buf].lptr + bufposn); act_disk_buf=!act_disk_buf; /* index next audio buf */ srb_bufaddr = srb_bufaddr + words_rem; /* point to curr pos in srb buf */ words_rem = contab.adbl - words_rem; /* no. words left in srb_buf */ fgetbytes(srb_bufaddr,words_rem,DiskBuffer[act_disk_buf].lptr); PostMessage(hCommandWnd,WM_COMMAND,swap_buf_id,0L); // if(diskproc!=NULL) { // (*diskproc)(); // } } bufposn = words_rem << 1; /* index no. of bytes into new buf */ } srbctl |= BIOHI; /* set BIO to allow TMS to write port 0 */ wr_srb_ctlreg(srbctl); } srbctl |= (PROG & srbstat); /* restore original state of PROG bit */ wr_srb_ctlreg(srbctl); outp(I8259_CTL_REG, EOI); /* send End_of_Interrupt to 8259 */ return; } -- ------------------------------------------------------------------------- Ian McDonald | 52 Cook Street| / /\ /\ Hamilton | This space free for advertising !! / / \/ \ New Zealand | / / \ +64-71-563438 | I can receive mail but can't reply to it.