main.c

/*
	Copyright 2012-2014 Benjamin Vedder	benjamin@vedder.se

	This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
    */

#include "ch.h"
#include "hal.h"
#include "stm32f4xx_conf.h"

#include <stdio.h>
#include <math.h>
#include <string.h>
#include <stdlib.h>

#include "main.h"
#include "mcpwm.h"
#include "ledpwm.h"
#include "comm_usb.h"
#include "ledpwm.h"
#include "terminal.h"
#include "hw.h"
#include "app.h"
#include "packet.h"
#include "commands.h"
#include "timeout.h"
#include "comm_can.h"
#include "ws2811.h"
#include "led_external.h"

/*
 * Timers used:
 * TIM7: servo
 * TIM1: mcpwm
 * TIM2: mcpwm
 * TIM12: mcpwm
 * TIM8: mcpwm
 * TIM3: servo_dec
 * TIM4: WS2811/WS2812 LEDs
 *
 * DMA/stream	Device		Function
 * 1, 2			I2C1		Nunchuk, temp on rev 4.5
 * 1, 7			I2C1		Nunchuk, temp on rev 4.5
 * 1, 1			UART3		HW_R2
 * 1, 3			UART3		HW_R2
 * 2, 2			UART6		Other HW
 * 2, 7			UART6		Other HW
 * 2, 4			ADC			mcpwm
 * 1, 0			TIM4		WS2811/WS2812 LEDs CH1 (Ch 1)
 * 1, 3			TIM4		WS2811/WS2812 LEDs CH2 (Ch 2)
 *
 */

/*
 * Notes:
 *
 * Disable USB VBUS sensing:
 * ChibiOS-RT-master/os/hal/platforms/STM32/OTGv1/usb_lld.c
 *
 * change
 * otgp->GCCFG = GCCFG_VBUSASEN | GCCFG_VBUSBSEN | GCCFG_PWRDWN;
 * to
 * otgp->GCCFG = GCCFG_NOVBUSSENS | GCCFG_PWRDWN;
 *
 * This should be handled automatically with the latest version of
 * ChibiOS since I have added an option to the makefile.
 *
 */

// Private variables
#define ADC_SAMPLE_MAX_LEN		4000
static volatile int16_t curr0_samples[ADC_SAMPLE_MAX_LEN];
static volatile int16_t curr1_samples[ADC_SAMPLE_MAX_LEN];
static volatile int16_t ph1_samples[ADC_SAMPLE_MAX_LEN];
static volatile int16_t ph2_samples[ADC_SAMPLE_MAX_LEN];
static volatile int16_t ph3_samples[ADC_SAMPLE_MAX_LEN];
static volatile int16_t vzero_samples[ADC_SAMPLE_MAX_LEN];
static volatile uint8_t status_samples[ADC_SAMPLE_MAX_LEN];
static volatile int16_t curr_fir_samples[ADC_SAMPLE_MAX_LEN];
static volatile int16_t f_sw_samples[ADC_SAMPLE_MAX_LEN];

static volatile int sample_len = 1000;
static volatile int sample_int = 1;
static volatile int sample_ready = 1;
static volatile int sample_now = 0;
static volatile int sample_at_start = 0;
static volatile int was_start_sample = 0;
static volatile int start_comm = 0;
static volatile float main_last_adc_duration = 0.0;

static WORKING_AREA(periodic_thread_wa, 1024);
static WORKING_AREA(sample_send_thread_wa, 1024);
static WORKING_AREA(timer_thread_wa, 128);

static Thread *sample_send_tp;

static msg_t periodic_thread(void *arg) {
	(void)arg;

	chRegSetThreadName("Main periodic");

	int fault_print = 0;

	for(;;) {
		if (mcpwm_get_state() == MC_STATE_RUNNING) {
			ledpwm_set_intensity(LED_GREEN, 1.0);
		} else {
			ledpwm_set_intensity(LED_GREEN, 0.2);
		}

		mc_fault_code fault = mcpwm_get_fault();
		if (fault != FAULT_CODE_NONE) {
			if (!fault_print && AUTO_PRINT_FAULTS) {
				fault_print = 1;
				commands_printf("%s\n", mcpwm_fault_to_string(mcpwm_get_fault()));
			}

			for (int i = 0;i < (int)fault;i++) {
				ledpwm_set_intensity(LED_RED, 1.0);
				chThdSleepMilliseconds(250);
				ledpwm_set_intensity(LED_RED, 0.0);
				chThdSleepMilliseconds(250);
			}

			chThdSleepMilliseconds(500);
		} else {
			ledpwm_set_intensity(LED_RED, 0.0);
			fault_print = 0;
		}

		if (mcpwm_get_state() == MC_STATE_DETECTING) {
			commands_send_rotor_pos(mcpwm_get_detect_pos());
		}

		chThdSleepMilliseconds(25);
	}

	return 0;
}

static msg_t sample_send_thread(void *arg) {
	(void)arg;

	chRegSetThreadName("Main sample");

	sample_send_tp = chThdSelf();

	for(;;) {
		chEvtWaitAny((eventmask_t) 1);

		for (int i = 0;i < sample_len;i++) {
			uint8_t buffer[20];
			int index = 0;

			buffer[index++] = curr0_samples[i] >> 8;
			buffer[index++] = curr0_samples[i];
			buffer[index++] = curr1_samples[i] >> 8;
			buffer[index++] = curr1_samples[i];
			buffer[index++] = ph1_samples[i] >> 8;
			buffer[index++] = ph1_samples[i];
			buffer[index++] = ph2_samples[i] >> 8;
			buffer[index++] = ph2_samples[i];
			buffer[index++] = ph3_samples[i] >> 8;
			buffer[index++] = ph3_samples[i];
			buffer[index++] = vzero_samples[i] >> 8;
			buffer[index++] = vzero_samples[i];
			buffer[index++] = status_samples[i];
			buffer[index++] = curr_fir_samples[i] >> 8;
			buffer[index++] = curr_fir_samples[i];
			buffer[index++] = f_sw_samples[i] >> 8;
			buffer[index++] = f_sw_samples[i];

			commands_send_samples(buffer, index);
		}
	}

	return 0;
}

static msg_t timer_thread(void *arg) {
	(void)arg;

	chRegSetThreadName("msec_timer");

	for(;;) {
		packet_timerfunc();
		chThdSleepMilliseconds(1);
	}

	return 0;
}

/*
 * Called every time new ADC values are available. Note that
 * the ADC is initialized from mcpwm.c
 */
void main_dma_adc_handler(void) {
	ledpwm_update_pwm();

	if (sample_at_start && (mcpwm_get_state() == MC_STATE_RUNNING ||
			start_comm != mcpwm_get_comm_step())) {
		sample_now = 0;
		sample_ready = 0;
		was_start_sample = 1;
		sample_at_start = 0;
	}

	static int a = 0;
	if (!sample_ready) {
		a++;
		if (a >= sample_int) {
			a = 0;

			if (mcpwm_get_state() == MC_STATE_DETECTING) {
				curr0_samples[sample_now] = (int16_t)mcpwm_detect_currents[mcpwm_get_comm_step() - 1];
				curr1_samples[sample_now] = (int16_t)mcpwm_detect_currents_diff[mcpwm_get_comm_step() - 1];
			} else {
				curr0_samples[sample_now] = ADC_curr_norm_value[0];
				curr1_samples[sample_now] = ADC_curr_norm_value[1];
			}

			ph1_samples[sample_now] = ADC_V_L1 - mcpwm_vzero;
			ph2_samples[sample_now] = ADC_V_L2 - mcpwm_vzero;
			ph3_samples[sample_now] = ADC_V_L3 - mcpwm_vzero;
			vzero_samples[sample_now] = mcpwm_vzero;

			curr_fir_samples[sample_now] = (int16_t)(mcpwm_get_tot_current_filtered() * 100.0);
			f_sw_samples[sample_now] = (int16_t)(mcpwm_get_switching_frequency_now() / 10.0);

			uint8_t tmp;

			if (was_start_sample) {
				if (mcpwm_get_state() == MC_STATE_OFF) {
					tmp = 1;
				} else if (mcpwm_get_state() == MC_STATE_RUNNING) {
					tmp = 2;
				} else {
					tmp = 3;
				}
			} else {
				tmp = mcpwm_read_hall_phase();
			}

			status_samples[sample_now] = mcpwm_get_comm_step() | (tmp << 3);

			sample_now++;

			if (sample_now == sample_len) {
				sample_ready = 1;
				sample_now = 0;
				was_start_sample = 0;
				chSysLockFromIsr();
				chEvtSignalI(sample_send_tp, (eventmask_t) 1);
				chSysUnlockFromIsr();
			}

			main_last_adc_duration = mcpwm_get_last_adc_isr_duration();
		}
	}
}

float main_get_last_adc_isr_duration(void) {
	return main_last_adc_duration;
}

void main_sample_print_data(bool at_start, uint16_t len, uint8_t decimation) {
	if (len > ADC_SAMPLE_MAX_LEN) {
		len = ADC_SAMPLE_MAX_LEN;
	}

	sample_len = len;
	sample_int = decimation;

	if (at_start) {
		sample_at_start = 1;
		start_comm = mcpwm_get_comm_step();
	} else {
		sample_now = 0;
		sample_ready = 0;
	}
}

int main(void) {
	halInit();
	chSysInit();

	chThdSleepMilliseconds(1000);

	conf_general_init();
	hw_init_gpio();
	ledpwm_init();

	mc_configuration mcconf;
	conf_general_read_mc_configuration(&mcconf);
	mcpwm_init(&mcconf);

	commands_init();
	comm_usb_init();
	comm_can_init();

	app_configuration appconf;
	conf_general_read_app_configuration(&appconf);
	app_init(&appconf);
	timeout_init();
	timeout_configure(appconf.timeout_msec, appconf.timeout_brake_current);

#if WS2811_ENABLE
	ws2811_init();
	led_external_init();
#endif

  servo_init();

	// Threads
	chThdCreateStatic(periodic_thread_wa, sizeof(periodic_thread_wa), NORMALPRIO, periodic_thread, NULL);
	chThdCreateStatic(sample_send_thread_wa, sizeof(sample_send_thread_wa), NORMALPRIO - 1, sample_send_thread, NULL);
	chThdCreateStatic(timer_thread_wa, sizeof(timer_thread_wa), NORMALPRIO, timer_thread, NULL);

	for(;;) {
		chThdSleepMilliseconds(100);
	}
}