hoverboard-firmware-hack-se.../Src/bldc.c

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#include "stm32f1xx_hal.h"
#include "defines.h"
#include "setup.h"
#include "config.h"
volatile int posl = 0;
volatile int posr = 0;
volatile int pwml = 0;
volatile int pwmr = 0;
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volatile int weakl = 0;
volatile int weakr = 0;
extern volatile int speed;
extern volatile adc_buf_t adc_buffer;
extern volatile uint32_t timeout;
uint8_t buzzerFreq = 0;
uint8_t buzzerPattern = 0;
uint8_t enable = 0;
const int pwm_res = 64000000 / 2 / PWM_FREQ; // = 2000
const uint8_t hall_to_pos[8] = {
0,
0,
2,
1,
4,
5,
3,
0,
};
inline void blockPWM(int pwm, int pos, int *u, int *v, int *w) {
switch(pos) {
case 0:
*u = 0;
*v = pwm;
*w = -pwm;
break;
case 1:
*u = -pwm;
*v = pwm;
*w = 0;
break;
case 2:
*u = -pwm;
*v = 0;
*w = pwm;
break;
case 3:
*u = 0;
*v = -pwm;
*w = pwm;
break;
case 4:
*u = pwm;
*v = -pwm;
*w = 0;
break;
case 5:
*u = pwm;
*v = 0;
*w = -pwm;
break;
default:
*u = 0;
*v = 0;
*w = 0;
}
}
inline void blockPhaseCurrent(int pos, int u, int v, int *q) {
switch(pos) {
case 0:
*q = u - v;
// *u = 0;
// *v = pwm;
// *w = -pwm;
break;
case 1:
*q = u;
// *u = -pwm;
// *v = pwm;
// *w = 0;
break;
case 2:
*q = u;
// *u = -pwm;
// *v = 0;
// *w = pwm;
break;
case 3:
*q = v;
// *u = 0;
// *v = -pwm;
// *w = pwm;
break;
case 4:
*q = v;
// *u = pwm;
// *v = -pwm;
// *w = 0;
break;
case 5:
*q = -(u - v);
// *u = pwm;
// *v = 0;
// *w = -pwm;
break;
default:
*q = 0;
// *u = 0;
// *v = 0;
// *w = 0;
}
}
uint16_t buzzerTimer = 0;
int offsetcount = 0;
int offsetrl1 = 2000;
int offsetrl2 = 2000;
int offsetrr1 = 2000;
int offsetrr2 = 2000;
int offsetdcl = 2000;
int offsetdcr = 2000;
float batteryVoltage = BAT_NUMBER_OF_CELLS * 4.0;
int curl = 0;
// int errorl = 0;
// int kp = 5;
// volatile int cmdl = 0;
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int last_pos = 0;
int timer = 0;
const int max_time = PWM_FREQ / 10;
volatile int vel = 0;
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//scan 8 channels with 2ADCs @ 20 clk cycles per sample
//meaning ~80 ADC clock cycles @ 8MHz until new DMA interrupt =~ 100KHz
//=640 cpu cycles
void DMA1_Channel1_IRQHandler() {
DMA1->IFCR = DMA_IFCR_CTCIF1;
// HAL_GPIO_WritePin(LED_PORT, LED_PIN, 1);
if(offsetcount < 1000) { // calibrate ADC offsets
offsetcount++;
offsetrl1 = (adc_buffer.rl1 + offsetrl1) / 2;
offsetrl2 = (adc_buffer.rl2 + offsetrl2) / 2;
offsetrr1 = (adc_buffer.rr1 + offsetrr1) / 2;
offsetrr2 = (adc_buffer.rr2 + offsetrr2) / 2;
offsetdcl = (adc_buffer.dcl + offsetdcl) / 2;
offsetdcr = (adc_buffer.dcr + offsetdcr) / 2;
return;
}
if (buzzerTimer % 100 == 0) { // because you get float rounding errors if it would run every time
batteryVoltage = batteryVoltage * 0.999 + ((float)adc_buffer.batt1 * ((float)BAT_CALIB_REAL_VOLTAGE / (float)BAT_CALIB_ADC)) * 0.001;
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}
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//disable PWM when current limit is reached (current chopping)
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if(ABS((adc_buffer.dcl - offsetdcl) * MOTOR_AMP_CONV_DC_AMP) > DC_CUR_LIMIT || timeout > TIMEOUT || enable == 0) {
LEFT_TIM->BDTR &= ~TIM_BDTR_MOE;
//HAL_GPIO_WritePin(LED_PORT, LED_PIN, 1);
} else {
LEFT_TIM->BDTR |= TIM_BDTR_MOE;
//HAL_GPIO_WritePin(LED_PORT, LED_PIN, 0);
}
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if(ABS((adc_buffer.dcr - offsetdcr) * MOTOR_AMP_CONV_DC_AMP) > DC_CUR_LIMIT || timeout > TIMEOUT || enable == 0) {
RIGHT_TIM->BDTR &= ~TIM_BDTR_MOE;
} else {
RIGHT_TIM->BDTR |= TIM_BDTR_MOE;
}
int ul, vl, wl;
int ur, vr, wr;
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//determine next position based on hall sensors
uint8_t hall_ul = !(LEFT_HALL_U_PORT->IDR & LEFT_HALL_U_PIN);
uint8_t hall_vl = !(LEFT_HALL_V_PORT->IDR & LEFT_HALL_V_PIN);
uint8_t hall_wl = !(LEFT_HALL_W_PORT->IDR & LEFT_HALL_W_PIN);
uint8_t hall_ur = !(RIGHT_HALL_U_PORT->IDR & RIGHT_HALL_U_PIN);
uint8_t hall_vr = !(RIGHT_HALL_V_PORT->IDR & RIGHT_HALL_V_PIN);
uint8_t hall_wr = !(RIGHT_HALL_W_PORT->IDR & RIGHT_HALL_W_PIN);
uint8_t halll = hall_ul * 1 + hall_vl * 2 + hall_wl * 4;
posl = hall_to_pos[halll];
posl += 2;
posl %= 6;
uint8_t hallr = hall_ur * 1 + hall_vr * 2 + hall_wr * 4;
posr = hall_to_pos[hallr];
posr += 2;
posr %= 6;
blockPhaseCurrent(posl, adc_buffer.rl1 - offsetrl1, adc_buffer.rl2 - offsetrl2, &curl);
//setScopeChannel(2, (adc_buffer.rl1 - offsetrl1) / 8);
//setScopeChannel(3, (adc_buffer.rl2 - offsetrl2) / 8);
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//create square wave for buzzer
buzzerTimer++;
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if (buzzerFreq != 0 && (buzzerTimer / 5000) % (buzzerPattern + 1) == 0) {
if (buzzerTimer % buzzerFreq == 0) {
HAL_GPIO_TogglePin(BUZZER_PORT, BUZZER_PIN);
}
} else {
HAL_GPIO_WritePin(BUZZER_PORT, BUZZER_PIN, 0);
}
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//update PWM channels based on position
blockPWM(pwml, posl, &ul, &vl, &wl);
blockPWM(pwmr, posr, &ur, &vr, &wr);
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int weakul, weakvl, weakwl;
if (pwml > 0) {
blockPWM(weakl, (posl+5) % 6, &weakul, &weakvl, &weakwl);
} else {
blockPWM(-weakl, (posl+1) % 6, &weakul, &weakvl, &weakwl);
}
ul += weakul;
vl += weakvl;
wl += weakwl;
int weakur, weakvr, weakwr;
if (pwmr > 0) {
blockPWM(weakr, (posr+5) % 6, &weakur, &weakvr, &weakwr);
} else {
blockPWM(-weakr, (posr+1) % 6, &weakur, &weakvr, &weakwr);
}
ur += weakur;
vr += weakvr;
wr += weakwr;
LEFT_TIM->LEFT_TIM_U = CLAMP(ul + pwm_res / 2, 10, pwm_res-10);
LEFT_TIM->LEFT_TIM_V = CLAMP(vl + pwm_res / 2, 10, pwm_res-10);
LEFT_TIM->LEFT_TIM_W = CLAMP(wl + pwm_res / 2, 10, pwm_res-10);
RIGHT_TIM->RIGHT_TIM_U = CLAMP(ur + pwm_res / 2, 10, pwm_res-10);
RIGHT_TIM->RIGHT_TIM_V = CLAMP(vr + pwm_res / 2, 10, pwm_res-10);
RIGHT_TIM->RIGHT_TIM_W = CLAMP(wr + pwm_res / 2, 10, pwm_res-10);
}