?? pc.c
字號(hào):
{
//change by cmj
//#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
// OS_CPU_SR cpu_sr;
//#endif
// PC_ExitFlag = FALSE; /* Indicate that we are not exiting yet! */
// OSTickDOSCtr = 1; /* Initialize the DOS tick counter */
// PC_TickISR = PC_VectGet(VECT_TICK); /* Get MS-DOS's tick vector */
// PC_VectSet(VECT_DOS_CHAIN, PC_TickISR); /* Store MS-DOS's tick to chain */
// setjmp(PC_JumpBuf); /* Capture where we are in DOS */
// if (PC_ExitFlag == TRUE) { /* See if we are exiting back to DOS */
// OS_ENTER_CRITICAL();
// PC_SetTickRate(18); /* Restore tick rate to 18.2 Hz */
// OS_EXIT_CRITICAL();
// PC_VectSet(VECT_TICK, PC_TickISR); /* Restore DOS's tick vector */
// PC_DispClrScr(DISP_FGND_WHITE + DISP_BGND_BLACK); /* Clear the display */
// exit(0); /* Return to DOS */
// }
}
/*$PAGE*/
/*
*********************************************************************************************************
* ELAPSED TIME INITIALIZATION
*
* Description : This function initialize the elapsed time module by determining how long the START and
* STOP functions take to execute. In other words, this function calibrates this module
* to account for the processing time of the START and STOP functions.
*
* Arguments : None.
*
* Returns : None.
*********************************************************************************************************
*/
void PC_ElapsedInit(void)
{
PC_ElapsedOverhead = 0;
PC_ElapsedStart();
PC_ElapsedOverhead = PC_ElapsedStop();
}
/*$PAGE*/
/*
*********************************************************************************************************
* INITIALIZE PC'S TIMER #2
*
* Description : This function initialize the PC's Timer #2 to be used to measure the time between events.
* Timer #2 will be running when the function returns.
*
* Arguments : None.
*
* Returns : None.
*********************************************************************************************************
*/
//change by cmj
void PC_ElapsedStart(void)
{
PC_ElapsedOverhead = T0TC;
}
//void PC_ElapsedStart(void)
//{
//#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
// OS_CPU_SR cpu_sr;
//#endif
// INT8U data;
// OS_ENTER_CRITICAL();
// data = (INT8U)inp(0x61); /* Disable timer #2 */
// data &= 0xFE;
// outp(0x61, data);
// outp(TICK_T0_8254_CWR, TICK_T0_8254_CTR2_MODE0); /* Program timer #2 for Mode 0 */
// outp(TICK_T0_8254_CTR2, 0xFF);
// outp(TICK_T0_8254_CTR2, 0xFF);
// data |= 0x01; /* Start the timer */
// outp(0x61, data);
// OS_EXIT_CRITICAL();
//}
/*$PAGE*/
/*
*********************************************************************************************************
* STOP THE PC'S TIMER #2 AND GET ELAPSED TIME
*
* Description : This function stops the PC's Timer #2, obtains the elapsed counts from when it was
* started and converts the elapsed counts to micro-seconds.
*
* Arguments : None.
*
* Returns : The number of micro-seconds since the timer was last started.
*
* Notes : - The returned time accounts for the processing time of the START and STOP functions.
* - 54926 represents 54926S-16 or, 0.838097 which is used to convert timer counts to
* micro-seconds. The clock source for the PC's timer #2 is 1.19318 MHz (or 0.838097 uS)
*********************************************************************************************************
*/
//change by cmj
INT16U PC_ElapsedStop(void)
{
return ((T0TC - PC_ElapsedOverhead) / (Fpclk / 1000000));
}
//INT16U PC_ElapsedStop(void)
//{
//#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
// OS_CPU_SR cpu_sr;
//#endif
// INT8U data;
// INT8U low;
// INT8U high;
// INT16U cnts;
// OS_ENTER_CRITICAL();
// data = (INT8U)inp(0x61); /* Disable the timer */
// data &= 0xFE;
// outp(0x61, data);
// outp(TICK_T0_8254_CWR, TICK_T0_8254_CTR2_LATCH); /* Latch the timer value */
// low = inp(TICK_T0_8254_CTR2);
// high = inp(TICK_T0_8254_CTR2);
// cnts = (INT16U)0xFFFF - (((INT16U)high << 8) + (INT16U)low); /* Compute time it took for operation */
// OS_EXIT_CRITICAL();
// return ((INT16U)((INT32U)cnts * 54926L >> 16) - PC_ElapsedOverhead);
//}
/*$PAGE*/
/*
*********************************************************************************************************
* GET THE CURRENT DATE AND TIME
*
* Description: This function obtains the current date and time from the PC.
*
* Arguments : s is a pointer to where the ASCII string of the current date and time will be stored.
* You must allocate at least 21 bytes (includes the NUL) of storage in the return
* string. The date and time will be formatted as follows:
*
* "YYYY-MM-DD HH:MM:SS"
*
* Returns : none
*********************************************************************************************************
*/
//change by cmj
void PC_GetDateTime (char *s)
{
INT32U da_year,da_mon,da_day,ti_hour,ti_min,ti_sec;
ti_sec = SEC;
ti_min = MIN;
ti_hour = HOUR;
da_day = DOM;
da_mon = MONTH;
da_year = YEAR;
sprintf(s, "%04d-%02d-%02d %02d:%02d:%02d",
da_year,da_mon,da_day,ti_hour,ti_min,ti_sec);
}
//void PC_GetDateTime (char *s)
//{
// struct time now;
// struct date today;
// gettime(&now);
// getdate(&today);
// sprintf(s, "%04d-%02d-%02d %02d:%02d:%02d",
// today.da_year,
// today.da_mon,
// today.da_day,
// now.ti_hour,
// now.ti_min,
// now.ti_sec);
//}
/*$PAGE*/
/*
*********************************************************************************************************
* CHECK AND GET KEYBOARD KEY
*
* Description: This function checks to see if a key has been pressed at the keyboard and returns TRUE if
* so. Also, if a key is pressed, the key is read and copied where the argument is pointing
* to.
*
* Arguments : c is a pointer to where the read key will be stored.
*
* Returns : TRUE if a key was pressed
* FALSE otherwise
*********************************************************************************************************
*/
//change by cmj
BOOLEAN PC_GetKey (INT16S *c)
{
if ((U0LSR & 0x00000001) != 0)
{
*c = U0RBR;
return (TRUE);
}
else
{
*c = 0x00;
return (FALSE);
}
}
//BOOLEAN PC_GetKey (INT16S *c)
//{
// if (kbhit()) { /* See if a key has been pressed */
// *c = (INT16S)getch(); /* Get key pressed */
// return (TRUE);
// } else {
// *c = 0x00; /* No key pressed */
// return (FALSE);
// }
//}
/*$PAGE*/
/*
*********************************************************************************************************
* SET THE PC'S TICK FREQUENCY
*
* Description: This function is called to change the tick rate of a PC.
*
* Arguments : freq is the desired frequency of the ticker (in Hz)
*
* Returns : none
*
* Notes : 1) The magic number 2386360 is actually twice the input frequency of the 8254 chip which
* is always 1.193180 MHz.
* 2) The equation computes the counts needed to load into the 8254. The strange equation
* is actually used to round the number using integer arithmetic. This is equivalent to
* the floating point equation:
*
* 1193180.0 Hz
* count = ------------ + 0.5
* freq
*********************************************************************************************************
*/
//del by cmj
//void PC_SetTickRate (INT16U freq)
//{
//#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
// OS_CPU_SR cpu_sr;
//#endif
// INT16U count;
// if (freq == 18) { /* See if we need to restore the DOS frequency */
// count = 0;
// } else if (freq > 0) {
/* Compute 8254 counts for desired frequency and ... */
/* ... round to nearest count */
// count = (INT16U)(((INT32U)2386360L / freq + 1) >> 1);
// } else {
// count = 0;
// }
// OS_ENTER_CRITICAL();
// outp(TICK_T0_8254_CWR, TICK_T0_8254_CTR0_MODE3); /* Load the 8254 with desired frequency */
// outp(TICK_T0_8254_CTR0, count & 0xFF); /* Low byte */
// outp(TICK_T0_8254_CTR0, (count >> 8) & 0xFF); /* High byte */
// OS_EXIT_CRITICAL();
//}
/*$PAGE*/
/*
*********************************************************************************************************
* OBTAIN INTERRUPT VECTOR
*
* Description: This function reads the pointer stored at the specified vector.
*
* Arguments : vect is the desired interrupt vector number, a number between 0 and 255.
*
* Returns : The address of the Interrupt handler stored at the desired vector location.
*********************************************************************************************************
*/
//del by cmj
//void *PC_VectGet (INT8U vect)
//{
//#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
// OS_CPU_SR cpu_sr;
//#endif
// INT16U *pvect;
// INT16U off;
// INT16U seg;
// pvect = (INT16U *)MK_FP(0x0000, vect * 4); /* Point into IVT at desired vector location */
// OS_ENTER_CRITICAL();
// off = *pvect++; /* Obtain the vector's OFFSET */
// seg = *pvect; /* Obtain the vector's SEGMENT */
// OS_EXIT_CRITICAL();
// return (MK_FP(seg, off));
//}
/*
*********************************************************************************************************
* INSTALL INTERRUPT VECTOR
*
* Description: This function sets an interrupt vector in the interrupt vector table.
*
* Arguments : vect is the desired interrupt vector number, a number between 0 and 255.
* isr is a pointer to a function to execute when the interrupt or exception occurs.
*
* Returns : none
*********************************************************************************************************
*/
//del by cmj
//void PC_VectSet (INT8U vect, void (*isr)(void))
//{
//#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
// OS_CPU_SR cpu_sr;
//#endif
// INT16U *pvect;
// pvect = (INT16U *)MK_FP(0x0000, vect * 4); /* Point into IVT at desired vector location */
// OS_ENTER_CRITICAL();
// *pvect++ = (INT16U)FP_OFF(isr); /* Store ISR offset */
// *pvect = (INT16U)FP_SEG(isr); /* Store ISR segment */
// OS_EXIT_CRITICAL();
//}
//add by cmj
INT8U random(INT8U seed)
{
uint16 temp;
temp = rand();
temp = temp % seed;
return temp;
}
/*********************************************************************************************************
** End Of File
********************************************************************************************************/
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