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pins.h
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pins.h
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/*
* TongSheng TSDZ2 motor controller firmware/
*
* Copyright (C) Casainho, 2018.
*
* Released under the GPL License, Version 3
*/
#ifndef _PINS_H_
#define _PINS_H_
#include "stm8s_gpio.h"
/* Connections:
*
* Motor PHASE_A: blue wire
* Motor PHASE_B: green wire
* Motor PHASE_C: yellow wire
*
* The battery_current is measured using the LM385 opamp in an non inverting configuration. The pin 1 is the output and has a low pass filter.
* The pin 3 (+) has the signal input and pin 2 (-) has the feedback loop, composed of R1 = 11k and R2 = 1k.
* The gain is: (R1 / R2) + 1 = (11k / 1k) + 1 = 12.
* We know that 1 Amp of battery current is equal to 5 ADC_12bits steps, so 1 Amp = (5V / 1024) * 5 = 0.0244V.
* Each 1 Amp at the shunt is then 0.0244V / 12 = 0.002V. This also means shunt should has 0.002 ohms resistance.
* Since there is a transistor that has a base resistor connected throught a 1K resisitor to the shunt voltage, and also the base has
* another connected resistor of 27K, I think the transistor will switch on at arround 0.5V on the shunt voltage and that means arround 22 amps.
* The microcontroller should read the turned on transistor signal on PD0, to detect the battery_over_current of 22 amps. (?????)
*
* PIN | IN/OUT|Function
* ----------------------------------------------------------
* PD0 | in | battery_over_current (PD0 on original firmware configured as: Port D0 alternate function = TIM1_BKIN)
* PB4 (ADC_AIN4) | in | torque sensor signal, this signal is amplified by the opamp
* PB5 (ADC_AIN5) | in | battery_current (14 ADC bits step per 1 amp; this signal amplified by the opamp 358)
* PB6 (ADC_AIN6) | in | battery_voltage (0.344V per ADC 8bits step: 17.9V --> ADC_10bits = 52; 40V --> ADC_10bits = 116; this signal atenuated by the opamp 358)
*
* PE5 | in | Hall_sensor_A
* PD2 | in | Hall_sensor_B
* PC5 | in | Hall_sensor_C
*
* PB2 (TIM1_CH3N) | out | PWM_phase_A_low
* PB1 (TIM1_CH2N) | out | PWM_phase_B_low
* PB0 (TIM1_CH1N) | out | PWM_phase_C_low
* PC3 (TIM1_CH3) | out | PWM_phase_A_high
* PC2 (TIM1_CH2) | out | PWM_phase_B_high
* PC1 (TIM1_CH1) | out | PWM_phase_C_high
*
* PD5 (UART2_TX) | out | usart_tx
* PD6 (UART2_RX) | in | usart_rx
*
* PC6 | in | brake
* PB7 (ADC_AIN7) | in | throttle
* PD7 | in | PAS1 (yellow wire)
* PE0 | in | PAS2 (blue wire)
* PA1 | in | wheel speed
*
* PD3 | out | torque sensor excitation
* PB3 (ADC_AIN3) | in | ???? realted to torque sensor ???
* PD4 | out | lights. Enable/disable 5V output of the circuit that powers the lights wire of 6V.
*
* PE6 (ADC_AIN9) | in | this signal goes to a pad of a resistor that is not assembled. If was assembled, it would measure the opamp output value related to AIN4.
*
* PE1 tested as input on original firmware | External interrupt enabled
* PE2 tested as input on original firmware
* PD1 tested as input on original firmware | External interrupt enabled
*
* PA2 tested as input on original firmware
* PA4 configured as output on original firmware, original firmware seems to only put it at 1 / enable
* PA5 tested as input on original firmware
* PA6 configured as output on original firmware, original firmware seems to only put it at 1 / enable
*
*/
#define HALL_SENSOR_A__PORT GPIOE
#define HALL_SENSOR_A__PIN GPIO_PIN_5
#define HALL_SENSOR_B__PORT GPIOD
#define HALL_SENSOR_B__PIN GPIO_PIN_2
#define HALL_SENSOR_C__PORT GPIOC
#define HALL_SENSOR_C__PIN GPIO_PIN_5
#define PMW_PHASE_A_LOW__PORT GPIOB
#define PMW_PHASE_A_LOW__PIN GPIO_PIN_2
#define PMW_PHASE_B_LOW__PORT GPIOB
#define PMW_PHASE_B_LOW__PIN GPIO_PIN_1
#define PMW_PHASE_C_LOW__PORT GPIOB
#define PMW_PHASE_C_LOW__PIN GPIO_PIN_0
#define PMW_PHASE_A_HIGH__PORT GPIOC
#define PMW_PHASE_A_HIGH__PIN GPIO_PIN_3
#define PMW_PHASE_B_HIGH__PORT GPIOC
#define PMW_PHASE_B_HIGH__PIN GPIO_PIN_2
#define PMW_PHASE_C_HIGH__PORT GPIOC
#define PMW_PHASE_C_HIGH__PIN GPIO_PIN_1
#define UART2_TX__PORT GPIOD
#define UART2_TX__PIN GPIO_PIN_5
#define UART2_RX__PORT GPIOD
#define UART2_RX__PIN GPIO_PIN_6
#define BRAKE__PORT GPIOC
#define BRAKE__PIN GPIO_PIN_6
#define PAS1__PORT GPIOE
#define PAS1__PIN GPIO_PIN_0
#define PAS2__PORT GPIOD
#define PAS2__PIN GPIO_PIN_7
#define WHEEL_SPEED_SENSOR__PORT GPIOA
#define WHEEL_SPEED_SENSOR__PIN GPIO_PIN_1
#define TORQUE_SENSOR_EXCITATION__PORT GPIOD
#define TORQUE_SENSOR_EXCITATION__PIN GPIO_PIN_3
#define TORQUE_SENSOR__PORT GPIOB
#define TORQUE_SENSOR__PIN GPIO_PIN_3
#define LIGHTS__PORT GPIOD
#define LIGHTS__PIN GPIO_PIN_4
#define THROTTLE__PORT GPIOB
#define THROTTLE__PIN GPIO_PIN_7
#define BATTERY_CURRENT__PORT GPIOB
#define BATTERY_CURRENT__PIN GPIO_PIN_5
#endif /* _PINS_H_ */