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randy.shaffer
Joined: 21 Mar 2018
Posts: 51
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| PIC16F15223 stops functioning for no apparent reason |
 Posted: Fri Feb 03, 2023 3:06 pm |
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| Code: | #include <16F15223.h> // device file
#include <stdint.h> // to use uint16_t, etc.
#fuses PUT_16MS, NOWDT
#device adc = 10 // 10-bit A2D
#use delay(internal = 32MHZ)
#use pwm(FREQUENCY = 31.25kHz, PWM_OFF, STREAM = IN1, output=PIN_A4)
#use pwm(FREQUENCY = 31.25kHz, PWM_OFF, STREAM = IN2, output=PIN_A5)
void main(void)
{
uint16_t HALL_VALUE = 0;
set_tris_a(0b00001011); // X: A7,A6. Inputs: A3,A1,A0. Outputs: A5,A4,A2.
set_tris_c(0b00001100); // X: C7,C6. Inputs: C3,C2. Outputs: C5,C4,C1,C0.
setup_vref(VREF_ON|VREF_ADC_2v048); // Set Vref = 2.048 V for ADC
setup_adc(ADC_CLOCK_DIV_32); // ADC clock = 32/32 = 1 MHz
setup_adc_ports(sAN18 | sAN19, VSS_FVR); // ADC channel 18 using Vref
while(TRUE)
{
PWM_set_duty_percent(IN2, FALSE); // IN2 = 0
PWM_on(IN2);
PWM_set_duty_percent(IN1, 500);
PWM_on(IN1); // IN1 = PWM
while(HALL_VALUE < 350)
{// move inhibitor away from motor until unlock limit exceeded
set_adc_channel(18); // enable selected channel
delay_us(10); // wait 10us for ADC to settle
HALL_VALUE = read_adc(); // get ADC value
}
PWM_off(IN1); // IN1 = 0
PWM_off(IN2); // IN2 = 0
delay_ms(2000);
PWM_set_duty_percent(IN1, FALSE); // IN1 = 0
PWM_on(IN1);
PWM_set_duty_percent(IN2, 500);
PWM_on(IN2); // IN2 = PWM
while(HALL_VALUE > 25)
{// move inhibitor toward motor
set_adc_channel(18); // enable selected channel
delay_us(10); // wait 10us for ADC to settle
HALL_VALUE = read_adc(); // get ADC value
}
PWM_off(IN1); // IN1 = 0
PWM_off(IN2); // IN2 = 0
delay_ms(2000);
}
} // end main |
After running properly for a while, sometimes a short while, the PIC hangs up and I have to cycle power to restart. If I try to re-program after a hang up, it will not start up. Am I missing an important fuse? Compiler is 5.114. PIC is a 16-QFN. |
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gaugeguy
Joined: 05 Apr 2011
Posts: 303
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| Posted: Fri Feb 03, 2023 3:38 pm |
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| Your notes mention a motor so I am going to go with conductor and/or radiated EMI. |
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temtronic
Joined: 01 Jul 2010
Posts: 9221
Location: Greensville,Ontario
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| Posted: Fri Feb 03, 2023 3:53 pm |
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as gg says, probably EMO from motor...
does the program work 'forever' if motor power is disconnected ? |
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randy.shaffer
Joined: 21 Mar 2018
Posts: 51
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| Posted: Fri Feb 03, 2023 4:05 pm |
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| I'll disconnect the motor and see. Thank you both for the advice. |
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