/**************************************************************************//**
* [url=home.php?mod=space&uid=288409]@file[/url] main.c
* [url=home.php?mod=space&uid=895143]@version[/url] V1.00
* [url=home.php?mod=space&uid=247401]@brief[/url] Open Loop BLDC Motor
*
* @note
* Copyright (C) 2019 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
/*---------------------------------------------------------------------------------------------------------*/
/* Pin Functions */
/*---------------------------------------------------------------------------------------------------------*/
//P07 - HALL Sensor W Phase, HALL_W
//P06 - HALL Sensor V Phase, HALL_V
//P05 - HALL Sensor U Phase, HALL_U
//P12 - Upper-arm MOS control of U phase, uh
//P14 - Lower-arm MOS control of U phase, ul
//P10 - Upper-arm MOS control of V phase, vh
//P00 - Lower-arm MOS control of V phase, vl
//P01 - Upper-arm MOS control of W phase, wh
//P03 - Lower-arm MOS control of W phase, wl
//P15 - Motor on/off switch
//P02 - UART RX
//P16 - UART TX
//P17 - ADC input
/*---------------------------------------------------------------------------------------------------------*/
/* Include File */
/*---------------------------------------------------------------------------------------------------------*/
#include "N76E003.h"
#include "Common.h"
#include "Delay.h"
#include "SFR_Macro.h"
#include "Function_define.h"
/*---------------------------------------------------------------------------------------------------------*/
/* Macro */
/*---------------------------------------------------------------------------------------------------------*/
#define UART1_DEBUG 0
#define ABS(X) (X) >= 0 ? (X) : -(X)
#define TIMER0_VALUE 65536-13333 //10ms
#define MotorBoostDuty 0.15
#define HallSensorPhase1 (0x05<<5)
#define HallSensorPhase2 (0x01<<5)
#define HallSensorPhase3 (0x03<<5)
#define HallSensorPhase4 (0x02<<5)
#define HallSensorPhase5 (0x06<<5)
#define HallSensorPhase6 (0x04<<5)
#define ADC_CONVERT_FINISH 1
#define MOTOR_ON_OFF_SWITCH P15
#define MOTOR_OFF 0
/*---------------------------------------------------------------------------------------------------------*/
/* Global variables */
/*---------------------------------------------------------------------------------------------------------*/
unsigned char data g_u8HallSensorMotorPhaseState = 0;
unsigned char data g_u8TimerIntCount;
unsigned char data g_u8TH0_Tmp, g_u8TL0_Tmp;
unsigned short data g_u16CurrentSpeed = 0;
/*---------------------------------------------------------------------------------------------------------*/
/* Functions */
/*---------------------------------------------------------------------------------------------------------*/
void CheckMotorPhaseByHallSensor(unsigned char HallSensorInput)
{
switch (HallSensorInput)
{
case HallSensorPhase1:
{
g_u8HallSensorMotorPhaseState = 1;
break;
}
case HallSensorPhase2:
{
g_u8HallSensorMotorPhaseState = 2;
break;
}
case HallSensorPhase3:
{
g_u8HallSensorMotorPhaseState = 3;
break;
}
case HallSensorPhase4:
{
g_u8HallSensorMotorPhaseState = 4;
break;
}
case HallSensorPhase5:
{
g_u8HallSensorMotorPhaseState = 5;
break;
}
case HallSensorPhase6:
{
g_u8HallSensorMotorPhaseState = 6;
break;
}
}
}
void ChangeMotorPhaseClockwise(void)
{
/* Change motor phase to next phase. */
switch (g_u8HallSensorMotorPhaseState)
{
case 1:
{
PMEN = 0xfe; //uh
PMD = 0x20; //wl
break;
}
case 2:
{
PMEN = 0xfb; //vh
PMD = 0x20; //wl
break;
}
case 3:
{
PMEN = 0xfb; //vh
PMD = 0x02; //ul
break;
}
case 4:
{
PMEN = 0xef; //wh
PMD = 0x02; //ul
break;
}
case 5:
{
PMEN = 0xef; //wh
PMD = 0x08; //vl
break;
}
case 6:
{
PMEN = 0xfe; //uh
PMD = 0x08; //vl
break;
}
}
}
void ChangeMotorPhaseCounterClockwise(void)
{
/* Change motor phase to next phase. */
switch (g_u8HallSensorMotorPhaseState)
{
case 6:
{
PMEN = 0xfe; //uh
PMD = 0x20; //wl
break;
}
case 5:
{
PMEN = 0xfb; //vh
PMD = 0x20; //wl
break;
}
case 4:
{
PMEN = 0xfb; //vh
PMD = 0x02; //ul
break;
}
case 3:
{
PMEN = 0xef; //wh
PMD = 0x02; //ul
break;
}
case 2:
{
PMEN = 0xef; //wh
PMD = 0x08; //vl
break;
}
case 1:
{
PMEN = 0xfe; //uh
PMD = 0x08; //vl
break;
}
}
}
void InitPWM(unsigned short *u16PWMDutyValue, unsigned char *u8OldMotorPhaseState)
{
/* Initialize the pwm mode and clock. */
PWM_GP_MODE_ENABLE;
PWM_SYNCHRONIZED_MODE;
PWM_CLOCK_FSYS;
PWMPH = 0x01;
PWMPL = 0xF3;
/*----------------------------------------------------------------------
PWM frequency = Fpwm/((PWMPH,PWMPL) + 1), Fpwm = Fsys/PWM_CLOCK_DIV
= (16MHz)/(0x1F3 + 1)
= 32KHz (0.03125 ms)
----------------------------------------------------------------------*/
/* Set PWM duty value on motor boost. */
*u16PWMDutyValue = 0x1F3 * MotorBoostDuty;
/* Initialize the pwm value */
PWM0H = HIBYTE(*u16PWMDutyValue);
PWM0L = LOBYTE(*u16PWMDutyValue);
/* Initialize the Motor phase parameter */
*u8OldMotorPhaseState = 0xFF;
CheckMotorPhaseByHallSensor((P0 & 0xE0));
/* Initialize the pwm pin mode and close whole MOS. */
PMEN = 0xff;
PMD = 0x00;
}
void InitGPIO(void)
{
Set_All_GPIO_Quasi_Mode;
P05_Input_Mode;
P06_Input_Mode;
P07_Input_Mode;
P15_Input_Mode;
P04_PushPull_Mode;
P12_PushPull_Mode;
P14_PushPull_Mode;
P10_PushPull_Mode;
P00_PushPull_Mode;
P01_PushPull_Mode;
P03_PushPull_Mode;
PWM0_P12_OUTPUT_ENABLE; /* P12 - Upper-arm MOS control of U phase, uh */
PWM1_P14_OUTPUT_ENABLE; /* P14 - Lower-arm MOS control of U phase, ul */
PWM2_P10_OUTPUT_ENABLE; /* P10 - Upper-arm MOS control of V phase, vh */
PWM3_P00_OUTPUT_ENABLE; /* P00 - Lower-arm MOS control of V phase, vl */
PWM4_P01_OUTPUT_ENABLE; /* P01 - Upper-arm MOS control of W phase, wh */
PWM5_P03_OUTPUT_ENABLE; /* P03 - Lower-arm MOS control of W phase, wl */
Enable_ADC_AIN0; /* ADC input */
PICON = 0xFC; /* PORT 0 interrupt (Pin int control) */
PINEN = 0XE0; /* Generates the pin interrupt when falling edge trigger */
PIPEN = 0XE0; /* Generates the pin interrupt when rising edge trigger */
set_EPI; /* Enable pin interrupt */
set_EX0; /* Enable external interrupt */
}
void InitTimer0(void)
{
clr_T0M; /* T0M=0, Timer0 Clock = Fsys/12 */
TMOD |= 0x01; /* Timer0 is 16-bit mode */
/* Calculate the timer counter value for controlling the interrupt period on 10ms. */
g_u8TH0_Tmp = HIBYTE(TIMER0_VALUE);
g_u8TL0_Tmp = LOBYTE(TIMER0_VALUE);
/* Sets the timer counter value for controlling the interrupt period. The period is setting on 10ms. */
TH0 = g_u8TH0_Tmp;
TL0 = g_u8TL0_Tmp;
set_ET0; /* enable Timer0 interrupt */
set_TR0; /* Timer0 start */
}
unsigned int GetTargetSpeed(void)
{
unsigned int data s16TargetSpeed;
/* ADC will sample the variable resistor value on ADCRH. */
/* Calculate the percentage of Max rotate speed 4500 rpm to target speed. */
s16TargetSpeed = (((unsigned long int)4500 * (unsigned long int)ADCRH) / 255);
/* Set the upper bound and lower bound on 450 and 4500 rpm. */
if (s16TargetSpeed < 450) s16TargetSpeed = 450;
if (s16TargetSpeed > 4500) s16TargetSpeed = 4500;
/* Clear ADN interrupt flag and re-trigger ADC to convert. */
clr_ADCF;
set_ADCS;
return s16TargetSpeed;
}
void main(void)
{
int data s16SpeedDiff = 0;
unsigned int data s16TargetSpeed = 0;
unsigned char data u8TimerCntForUART;
unsigned char data u8OldMotorPhaseState;
unsigned short data u16PWMDutyValue;
int data temp;
InitGPIO();
#ifdef UART1_DEBUG
/* Initialize UART1 for Debug */
u8TimerCntForUART = 0;
InitialUART1_Timer3(115200);
#endif
/* Initial PWM for controlling the 3 phase of motor */
InitPWM(&u16PWMDutyValue, &u8OldMotorPhaseState);
/* Initial Timer 0 for interrupt per 10 ms */
InitTimer0();
/* Reset timer and check the motor phase */
CheckMotorPhaseByHallSensor((P0 & 0xE0));
/* Clear ADC Flag and Reset Timer interrupt cnt */
clr_ADCF;
g_u8TimerIntCount = 0;
/* Enable all interrupts */
set_EA;
/* Start the ADC and PWM */
set_ADCS;
set_LOAD;
set_PWMRUN;
while (1)
{
/* Get Motor realtime speed by ADC */
if (ADCF == ADC_CONVERT_FINISH)
{
s16TargetSpeed = GetTargetSpeed();
}
if (MOTOR_ON_OFF_SWITCH == MOTOR_OFF)
{
/* Stop the motor */
clr_PWMRUN;
PMEN = 0xff;
PMD = 0x00;
/* If the on/off switch is keeping in off state, stay on this while loop. */
while (MOTOR_ON_OFF_SWITCH == MOTOR_OFF);
/* Motor on/off switch is switching to on, re-initial the pwm for starting rotate. */
/* Set PWM duty value on motor boost. */
u16PWMDutyValue = 0x1F3 * MotorBoostDuty;
/* Initialize the pwm value */
PWM0H = HIBYTE(u16PWMDutyValue);
PWM0L = LOBYTE(u16PWMDutyValue);
/* Initialize the Motor phase parameter */
u8OldMotorPhaseState = 0xFF;
CheckMotorPhaseByHallSensor((P0 & 0xE0));
/* Start the PWM */
set_LOAD;
set_PWMRUN;
/* Clear the Timer interrupt cnt */
g_u8TimerIntCount = 0;
}
else if (g_u8TimerIntCount >= 1) /* if the time past x * 10ms( x = 1 ), entering this if. */
{
/* Reset the timer interrupt times counter */
g_u8TimerIntCount = 0;
#ifdef UART1_DEBUG
/* Print the speed of motor */
u8TimerCntForUART++;
if (u8TimerCntForUART >= 30) //Per 300ms send UART data
{
Send_Data_To_UART1(s16TargetSpeed);
u8TimerCntForUART = 0;
}
#endif
/* Modified the PWM duty for tracing the target speed */
temp = ((((signed long int)0x1F3 * (signed long int)s16TargetSpeed)) / (signed long int)4500);
u16PWMDutyValue += (( temp > u16PWMDutyValue) ? 1 : (-1));
/* Set new PWM duty */
PWM0H = HIBYTE(u16PWMDutyValue);
PWM0L = LOBYTE(u16PWMDutyValue);
set_LOAD;
}
/* Change the Motor phase */
if (u8OldMotorPhaseState != g_u8HallSensorMotorPhaseState)
{
/* Record the last motor phase */
u8OldMotorPhaseState = g_u8HallSensorMotorPhaseState;
/* Change the motor phase */
ChangeMotorPhaseClockwise();
}
}
}
/*---------------------------------------------------------------------------------------------------------*/
/* Interrupt */
/*---------------------------------------------------------------------------------------------------------*/
void PinInterrupt_ISR(void) interrupt 7
{
/* Detecting the motor phase by hall sensor. */
CheckMotorPhaseByHallSensor(P0 & 0xe0);
/* Clear the Pin interrupt flag. */
PIF = 0x00;
}
void Timer0_ISR(void) interrupt 1
{
/* Sets the timer counter value for controlling the interrupt period. The period is setting on 10ms. */
TH0 = g_u8TH0_Tmp;
TL0 = g_u8TL0_Tmp;
/* Recorded the interrupt times. */
g_u8TimerIntCount++;
}
/*** (C) COPYRIGHT 2019 Nuvoton Technology Corp. ***/
EC_N76E003_Open_Loop_BLDC_Motor_V1.00.zip
(639.95 KB)
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