TRIS are not respected in CCS, how can I change it...

[tyrael]

When trying to put TX to in(High impedance), I is still working as out, im using fast_io, this is the same with the P1B PWM out in half bridge, I put the code, Its commented Thank for the help, CCS team!!!

The problem is in almost the final part of the Step function, everything is based on the AN906, thanks!!!!!


#include <18F4550.h>
#device adc=8
#fuses NOWDT,WDT128,HSPLL, NOPROTECT, BROWNOUT_NOSL, NOBROWNOUT,\
BORV20, NOPUT, NOCPD,NOSTVREN, NODEBUG, NOLVP, NOWRT, NOWRTD, NOIESO, NOFCMEN, NOPBADEN, NOWRTC,\
NOWRTB, NOEBTR, NOEBTRB, NOCPB, MCLR, NOLPT1OSC, NOXINST, PLL5, CPUDIV1
#use delay(clock=48000000)
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)

#use fast_io(A)
#use fast_io(B)
#use fast_io(C)
#use fast_io(D)


typedef short BOOL;



enum STEP_STATE
{
SS_STOP = 0,
SS_PAUSE,
SS_LEFT,
SS_RIGHT
};

enum STEP_MODE
{
SM_FULL_1PH = 0,
SM_FULL_2PH ,
SM_HALF,
SM_MICRO
};

enum STEP_TIME
{
ST_ONE = 0x01,
ST_TWO = 0x02,
ST_THREE = 0x04,
ST_FOUR = 0x08
};

const struct STEP_PARAM
{
INT iStepsCicle;
INT iStepSequence[8];
}SP_MODES[4] = {
{4, { ST_ONE, ST_TWO, ST_THREE, ST_FOUR}}, // FULL_1PH
{4, { ST_ONE|ST_TWO, ST_TWO|ST_THREE, ST_THREE|ST_FOUR, ST_FOUR|ST_ONE}}, // FULL_2PH
{8, { ST_ONE, ST_ONE|ST_TWO, ST_TWO, ST_TWO|ST_THREE, // HALF_STEP
ST_THREE, ST_THREE|ST_FOUR, ST_FOUR, ST_FOUR|ST_ONE}} // HALF_STEP
{8, { ST_ONE|ST_TWO, ST_TWO|ST_THREE, ST_TWO|ST_THREE, ST_THREE|ST_FOUR,
ST_THREE|ST_FOUR, ST_FOUR|ST_ONE, ST_FOUR|ST_ONE, ST_ONE|ST_TWO }} // FULL_2PH
};

const INT iPWMControl[8] = {0,0,1,1,0,0,1,1}; // PARA LOS TRIS SEGUN LOS PASOS

enum MICROSTEP_MODE
{
MSM_MICRO_4,
MSM_MICRO_8,
MSM_MICRO_16,
MSM_MICRO_32
};

const struct MICROSTEP_PARAM
{
INT iMicroSteps;
LONG lMicroSequencePWM[32];
}MSM_MODES[4] = {
{4, {1023, 828, 316, 0}}, // CALCULADO SEGUN LA FORMULA DE AN906
{8, {1023, 961, 784, 511, 178, 0}},
{16,{1023, 1006, 954, 870, 756, 616, 456, 280, 94, 0}}
{32,{1023, 1018, 1005, 982, 950, 909, 861, 804, 740, 670, 593, 511, 424, 335, 241, 146, 49, 0}}
};

// STATE VARIABLES
INT iMicroStepPos = 0; // Numero de el micro paso dentro de las dos fases
INT iStepPos = 0; // Numero para el paso de control
STEP_STATE ssState = SS_STOP;
STEP_MODE smMode = SM_HALF;
MICROSTEP_MODE msmMode = MSM_MICRO_4;
BOOL bChange = FALSE; // Variable aux para saber cuando hay que ir de mas a menos o de menos a mas en el arreglo
INT PWMA; // Hacia el tris de P1A - > TRISC.2
INT PWMB; // Hacia el tris de P1B - > TRISC.5

void SetMode( STEP_MODE Mode )
{
if(Mode != SM_MICRO )
{

}
else
{
setup_timer_2(T2_DIV_BY_1, 0xFF, 1);
setup_ccp1(CCP_PWM_HALF_BRIDGE|CCP_PWM_H_L);
set_tris_c(0xBF);
set_tris_d(0xFF);
}
smMode = Mode;
}

void SetMicroMode( MICROSTEP_MODE Mode )
{
msmMode = Mode;
}

void SetState( STEP_STATE State )
{
ssState = State;
}

void Step( void )
{
if( ssState == SS_PAUSE )
return;
if( ssState == SS_STOP )
{
output_b(0x00);
return;
}


if( ssState == SS_LEFT )
{
if( smMode != SM_MICRO )
{
--iStepPos;
if( iStepPos == -1 )
iStepPos = SP_MODES[smMode].iStepsCicle-1;
}
else
{
if(bChange)
--iMicroStepPos;
else
++iMicroStepPos;
if( iMicroStepPos == -1 || iMicroStepPos == (MSM_MODES[msmMode].iMicroSteps/2)+2 )
{
--iStepPos;
bChange = !bChange;
if(bChange)
iMicroStepPos-=2;
else
iMicroStepPos+=2;
}
if( iStepPos == -1 )
iStepPos = SP_MODES[smMode].iStepsCicle-1;;
}
}
if( ssState == SS_RIGHT )
{
if( smMode != SM_MICRO )
{
++iStepPos;
if( iStepPos == SP_MODES[smMode].iStepsCicle )
iStepPos = 0;
}
else
{
if(bChange)
++iMicroStepPos;
else
--iMicroStepPos;
if( iMicroStepPos == -1 || iMicroStepPos == (MSM_MODES[msmMode].iMicroSteps/2)+2 )
{
++iStepPos;
bChange = !bChange;
if(bChange)
iMicroStepPos+=2;
else
iMicroStepPos-=2;
}
if( iStepPos == SP_MODES[smMode].iStepsCicle )
iStepPos = 0;
}
}

if( smMode == SM_MICRO )
{
PWMA = iPWMControl[iStepPos];
PWMB = !PWMA;


/* AQUI EL PROBLEMA, el TRISD no sirve!!!!!*/
set_tris_c(0xBF);//--> High impedance(Input) for P1A, Works
set_tris_d(0xFF);//--> High Impedance(Input) for P1B, Dont work, still send PWM

set_pwm1_duty(MSM_MODES[msmMode].lMicroSequencePWM[iMicroStepPos]);
printf("POS = %u - DUTY = %lu \r\n6",iMicroStepPos, MSM_MODES[msmMode].lMicroSequencePWM[iMicroStepPos]);

}
output_b(SP_MODES[smMode].iStepSequence[iStepPos]);
}


void main()
{
INT DSE = 0;

setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_spi(FALSE);
setup_wdt(WDT_OFF);
setup_timer_0(RTCC_INTERNAL);
setup_timer_1(T1_INTERNAL|T1_DIV_BY_1);
setup_timer_3(T3_DISABLED|T3_DIV_BY_1);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);

set_tris_b(0x00);

SetState(SS_RIGHT);
SetMode(SM_MICRO);
SetMicroMode(MSM_MICRO_32);

while(1)
{
Step();
output_d(DSE++); // WHEN TRISD = FF, all should off, but P1B not
delay_ms(100);
}
}

[PCM programmer]

From the 18F4550 data sheet:

[tyrael]

Ok, thanks a lot, I will be more aware, but what about portD and ECCP, I have read them in 4550 datasheet, and says I have to configure the tris manually and there is no problem with P1A, the problem is P1B this is not respected, Unless another module is on, but i guest i turn off everything but ECCP, thanks a lot anyway!!!!

[tyrael]

Resuming the ploblem with P1A and P1B is I want P1A High impedance, P1B With PWM, do microstepping and then viseversa, when i put P1A at high impedance making it input it works, but P1B is still modulating when it's tris is Input, thanks

[tyrael]

program with just the problem

#include <18F4550.h>
#device adc=8
#fuses NOWDT,WDT128,HSPLL, NOPROTECT, BROWNOUT_NOSL, NOBROWNOUT, BORV20, NOPUT, NOCPD, NOSTVREN, NODEBUG, NOLVP, NOWRT, NOWRTD, NOIESO, NOFCMEN, NOPBADEN, NOWRTC, NOWRTB, NOEBTR, NOEBTRB, NOCPB, MCLR, NOLPT1OSC, NOXINST, PLL5, CPUDIV1
#use delay(clock=48000000)

void main()
{
setup_adc_ports(NO_ANALOGS|VSS_VDD);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_spi(FALSE);
setup_wdt(WDT_OFF);
setup_timer_0(RTCC_INTERNAL);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_timer_3(T3_DISABLED|T3_DIV_BY_1);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);

set_tris_c(0x00);
set_tris_d(0x00);
setup_timer_2(T2_DIV_BY_1, 0xFF, 1); // 10 bits, 40Khz, 1020 max aprox
setup_ccp1(CCP_PWM_HALF_BRIDGE|CCP_PWM_H_L);

while(1)
{
set_tris_c(0x00);
set_tris_d(0x00);
set_pwm1_duty(100); // 10% aprox // 3 segundos con PWM P1A y P1B
delay_ms(3000);
set_tris_c(0xFF); // Las quiero en Alta impedancia de entrada por 3 segundos
set_tris_d(0xFF); // P1A en el tris c si se queda en alta impedancia, pero el P1B, de tris D no, ese es mi problema
delay_ms(3000);
}

}

[PCM programmer]

According to the 18F4550 data sheet, it should work.

I compiled your program with PCH vs. 3.242, and the compiler is
making correct code:

[tyrael]

ok thanks you very much, well i been trying almost everything, i'm going to use a multiplexor, what i want was drive a PWM and make the other High using a pull up resistor when tristate, better I'll use a out put pin to drive the mux inplace of the tris register and send high or PWM directly, thanks a lot for your time and help.

Atte: Victor Daniel Jimenez Camacho