sinusoidal pwm
hellow,
i'm trying to simulate this code on proteus isis but m getting nothing meaningful.My code compile succesfully...i need help..please
attached is the circuit and the simulation result done on proteus isisCode:define OSC 20 ;*****************VARIABLE DECLARATION****************************************** wsave VAR BYTE $70 SYSTEM ' alternate save location for W wsave1 VAR BYTE $A0 SYSTEM ' location for W if in bank1 wsave2 VAR BYTE $120 SYSTEM ' location for W if in bank2 wsave3 VAR BYTE $1A0 SYSTEM ' location for W if in bank3 STEPCOUNT var byte 'Define stepcount as byte type variable stepcount = 256 ;**************SETTING THE REGISTERS WITH APPROPIATE BIT DEFINITION************* ADCON0 = %00000000 ADCON1 = %00000000 ;all anolog output trisb = %11111111 ;define porta as input trisc = %11111011 ;make ccp1/portc.2 an output pin trisa = %11111111 ;define porta as input TMR2 = 16 PR2 = 34 ;set for 36Khz HPWM(=72 steps*10 times*50hz) CCP1CON = %000001100 ;set to pwm mode T2CON=%00000110 ;enable timer2 and set timer2 prescaler value of 1:4 ;****************A sine lookup table in an array******************************** sineval var byte[72] sineval[1] = 128 ;0 degree sineval[2] = 137 ;5 degree sineval[3] = 146 sineval[4] = 154 sineval[5] = 163 sineval[6] = 171 sineval[7] = 179 sineval[8] = 187 sineval[9] = 194 sineval[10] = 200 sineval[11] = 206 sineval[12] = 212 sineval[13] = 216 sineval[14] = 220 sineval[15] = 224 sineval[16] = 227 sineval[17] = 228 sineval[18] = 229 sineval[19] = 230 ;90 degree sineval[20] = 229 sineval[21] = 228 sineval[22] = 227 sineval[23] = 224 sineval[24] = 220 sineval[25] = 216 sineval[26] = 212 sineval[27] = 206 sineval[28] = 200 sineval[29] = 194 sineval[30] = 187 sineval[31] = 179 sineval[32] = 171 sineval[33] = 163 sineval[34] = 154 sineval[35] = 146 sineval[36] = 137 sineval[37] = 128 ;180 degree sineval[38] = 119 sineval[39] = 110 sineval[40] = 102 sineval[41] = 93 sineval[42] = 85 sineval[43] = 77 sineval[44] = 69 sineval[45] = 62 sineval[46] = 56 sineval[47] = 50 sineval[48] = 44 sineval[49] = 40 sineval[50] = 36 sineval[51] = 32 sineval[52] = 29 sineval[53] = 28 sineval[54] = 26 sineval[55] = 26 sineval[56] = 26 sineval[57] = 28 sineval[58] = 29 sineval[59] = 32 sineval[60] = 36 sineval[61] = 40 sineval[62] = 44 sineval[63] = 50 sineval[64] = 56 sineval[65] = 62 sineval[66] = 69 sineval[67] = 77 sineval[68] = 85 sineval[69] = 93 sineval[70] = 102 sineval[71] = 110 sineval[72] =119 timerone var word INCLUDE "DT_INTS-14.bas" ; Base Interrupt System ;********Define INT_Handler as ISR********************************************** ASM INT_LIST macro ; IntSource, Label, Type, ResetFlag? INT_Handler TMR1_INT, _sine, ASM, yes endm INT_CREATE ; Creates the interrupt processor ENDASM T1CON = $31 ; Prescaler = 8, TMR1ON TMR1L = 255 TMR1H = 254 @ INT_ENABLE TMR1_INT ; Enable Timer 1 Interrupts timerone = $FA93 ;gives about 50 hz sine Main: pause 5 'if timerone = $F9FF then timerone = $FF00 GOTO Main '---[TMR1_INT - interrupt handler]------------------------------------------ sine: TMR1L = timerone.byte0 TMR1H = timerone.byte1 CCPR1L = sineval[STEPCOUNT]>>1 stepcount = stepcount -1 if stepcount = 0 then stepcount = 72 @ INT_RETURN
Originally Posted by bwaxing
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