cyber-gear/DrEmpower_CyberGear.py

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2023-09-02 17:55:19 +08:00
# -*- coding=utf-8 -*-
"""
大然机器人-小米CyberGear微电机python控制库
适用平台windows或linux平台
库版本号v1.0
测试主控版本windows 10 python 3.7
测试人员唐昭
测试时间2023.08.31
备注该库函数目前仅适用于大然科技的USB转CAN模块
淘宝链接 https://item.taobao.com/item.htm?spm=a1z10.5-c-s.w4002-22325405943.12.31aac3b4jKqqpc&id=705379289168
"""
import time
import serial
import math as cm
import struct
import numpy
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from typing import Any, Union
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P_MIN = -12.5
P_MAX = 12.5
V_MIN = -30.0
V_MAX = 30.0
KP_MIN = 0.0
KP_MAX = 500.0
KD_MIN = 0.0
KD_MAX = 5.0
T_MIN = -12.0
T_MAX = 12.0
I_MAX = 27
TORQUE_CONSTANT = T_MAX / I_MAX
RAD_DEG = 180 / cm.pi
DEG_RAD = cm.pi / 180
RAD_S_R_MIN = 30 / cm.pi
R_MIN_RAD_S = cm.pi / 30
uart = serial.Serial('COM325', 115200) # 在 windows 下控制电机测试相应的输入连接的COM口和波特率
# uart = serial.Serial('/dev/ttyAMA0', 115200) # 在树莓派raspbian下控制电机测试相应的输入连接的串口和波特率
# linux系统下
# result = os.popen("sudo ls -l /dev/ttyACM*").read() # 在 jetson nanoubuntu 下控制电机测试,相应的输入连接的串口和波特率
# com = result.split()[-1] # sudo chmod 666 /dev/ttyACM* 有时会报错,显示无曲线打开串口,这时需运行左侧命令
# os.system("sudo chmod 777 " + com)
# # os.system("sudo fuser -k " + com)
# uart = serial.Serial(com, 115200, timeout=0.5)
ERROR_FLAG = "状态正常"
READ_FLAG = 0 # 读取结果标志位
MOTOR_NUM = 64
motor_state = numpy.zeros((MOTOR_NUM, 6))
MCU_ID = [] # 电机主控MCU芯片序列号
# 电机状态二维数组通过motor_state[id_num-1]获取电机id_num的实时返回状态[angle,speed,torque,motor_temp,axis_error,mode_status]单位分别为degreer/min,Nm三个变量值均指的是电机输出轴
# 其中motor_state[id_num-1][0]表示id_num号电机的角度motor_state[id_num-1][1]表示id_num号电机的速度motor_state[id_num-1][2]表示id_num号电机的输出扭矩
"""
内部辅助函数用户无需使用
"""
# 串口发送函数
def write_data(data=[]):
global uart
if uart.inWaiting() > 0:
uart.read(uart.inWaiting())
try:
result = uart.write(data) # 写数据
return result
except Exception as e:
print("---error in write_data--", e)
print("重启串口")
uart.close()
uart.open()
result = uart.write(data) # 写数据
return result
# 串口接收函数
def read_data(num=16):
global READ_FLAG
READ_FLAG = -1
byte_list = []
i = 1000 # 经过测试发现正常接收16位耗时大概为500
# 该函数中的两处time.sleep(0.001)会影响CAN接收速度如果要提高CAN读取速度可以将这两行注释掉并将上面的i改成一个较大的值比如5000
while uart.inWaiting() == 0 and i > 0: # To do:
i -= 1
# time.sleep(0.001)
# time.sleep(0.001)
while uart.inWaiting() > 0:
byte_list.append(list(uart.read(1))[0])
if len(byte_list) == num:
READ_FLAG = 1
return byte_list
else:
print("Received data error in read_data(): " + str(byte_list))
READ_FLAG = -1
return
# USB转CAN模块包模式CAN报文->串行帧
def can_to_uart(data=[], rtr=0):
udata = [0xAA, 1, 0, 0x08, 0, 0, 0, 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]
if len(data) == 13 and data[0] == 0x08:
for i in range(12):
udata[4 + i] = data[i + 1]
return udata
else:
return []
# USB转CAN模块包模式串行帧->CAN报文
def uart_to_can(data=[]):
global READ_FLAG
cdata = [0x08, 0, 0, 0, 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]
if len(data) == 16 and data[3] == 0x08:
for i in range(12):
cdata[1 + i] = data[i + 4]
return cdata
else:
READ_FLAG = -1
return []
# CAN发送函数
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def send_command(id_num=1, cmd_mode=0, cmd_data=None, data=None, rtr=0):
if data is None:
data = []
if cmd_data is None:
cmd_data = []
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cdata = [0x08, 0, 0, 0, 0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]
cdata[1] = cmd_mode
cdata[2] = cmd_data[1]
cdata[3] = cmd_data[0] # master_ID
cdata[4] = int(id_num)
for i in range(8):
cdata[5 + i] = data[i]
write_data(data=can_to_uart(data=cdata, rtr=rtr))
# CAN接收函数
def receive_data():
udata = read_data(16)
if READ_FLAG == 1:
cdata = uart_to_can(data=udata)
if cdata[1] == 21:
dump_error(cdata, True)
return cdata[:]
# 数据格式转换函数decode是将二进制(bytes)转化成人看的懂得数据encode反之
def format_data(data=[], format="f f", type='decode'):
# print(data)
format_list = format.split()
rdata = []
if type == 'decode':
p = 0
for f in format_list:
s_f = []
if f == 'f':
s_f = [4, 'f']
elif f == 'u16':
s_f = [2, 'H']
elif f == 's16':
s_f = [2, 'h']
elif f == 'u32':
s_f = [4, 'I']
elif f == 's32':
s_f = [4, 'i']
elif f == 'u8':
s_f = [1, 'B']
elif f == 's8':
s_f = [1, 'b']
ba = bytearray()
if len(s_f) == 2:
for i in range(s_f[0]):
ba.append(data[p])
p = p + 1
rdata.append(struct.unpack(s_f[1], ba)[0])
else:
print('unkown format in format_data(): ' + f)
return []
return rdata
elif type == 'encode' and len(format_list) == len(data):
for i in range(len(format_list)):
f = format_list[i]
s_f = []
if f == 'f':
s_f = [4, 'f']
elif f == 'u16':
s_f = [2, 'H']
elif f == 's16':
s_f = [2, 'h']
elif f == 'u32':
s_f = [4, 'I']
elif f == 's32':
s_f = [4, 'i']
elif f == 'u8':
s_f = [1, 'B']
elif f == 's8':
s_f = [1, 'b']
if f != 'f':
data[i] = int(data[i])
if len(s_f) == 2:
bs = struct.pack(s_f[1], data[i])
for j in range(s_f[0]):
rdata.append(bs[j])
else:
print('unkown format in format_data(): ' + f)
return []
if len(rdata) < 4:
for i in range(4 - len(rdata)):
rdata.append(0x00)
return rdata
def float_to_uint(x, x_min, x_max, bits):
span = x_max - x_min
offset = x_min
if x > x_max:
x = x_max
elif x < x_min:
x = x_min
return int(((x - offset) * ((1 << bits) - 1) / span))
def uint_to_float(x, x_min, x_max, bits):
span = (1 << bits) - 1
offset = x_max - x_min
if x > span:
x = span
elif x < 0:
x = 0
return offset * x / span + x_min
# 故障反馈帧解析
def dump_error(rdata=[]):
"""打印电机错误编号(电机自动返回错误信息)
读取电机错误信息编码如果错误编码为0表示无异常如果错误编码不为0则表示存在故障
Args:
rdata: 故障反馈帧内容
Returns:
Raises:
"""
# [0x08 mode cmd_data[1] cmd_data[0] id_num data0 data1 data2 data3 data4 data5 data6 data7]
global ERROR_FLAG
mode = rdata[1]
cmd_data = rdata[2:4]
id_num = rdata[4]
data = rdata[5:]
if READ_FLAG == 1 and mode == 21:
print("电机CAN_ID" + str(id_num))
print("主CAN_ID" + str(cmd_data[0]))
if data[0] & 0x3F or data[5] & (0x01 << 0):
ERROR_FLAG = "状态异常:"
if data[0] & (0x01 << 0):
ERROR_FLAG = ERROR_FLAG + '\n' + "电机过温故障默认80度"
if data[0] & (0x01 << 1):
ERROR_FLAG = ERROR_FLAG + '\n' + "驱动芯⽚故障"
if data[0] & (0x01 << 2):
ERROR_FLAG = ERROR_FLAG + '\n' + "⽋压故障"
if data[0] & (0x01 << 3):
ERROR_FLAG = ERROR_FLAG + '\n' + "过压故障"
if data[0] & (0x01 << 4):
ERROR_FLAG = ERROR_FLAG + '\n' + "B相电流采样过流"
if data[0] & (0x01 << 5):
ERROR_FLAG = ERROR_FLAG + '\n' + "C相电流采样过流"
if data[0] & (0x01 << 7):
ERROR_FLAG = ERROR_FLAG + '\n' + "编码器未标定"
if data[1] & 0xFF:
ERROR_FLAG = ERROR_FLAG + '\n' + "过载故障"
if data[2] & (0x01 << 0):
ERROR_FLAG = ERROR_FLAG + '\n' + "A相电流采样过流"
if data[4] & (0x01 << 0):
ERROR_FLAG = ERROR_FLAG + '\n' + "电机过温预警默认75度"
else:
ERROR_FLAG = "状态正常"
print(ERROR_FLAG)
return ERROR_FLAG
# 电机应答反馈帧
def reply_state(id_num=1):
"""
@brief 电机运动控制指令状态实时返回参数
通过该函数读取电机运动控制指令实时返回的电机状态参数[angle,speed,torque,temp,error_flag,mode_status]单位分别为degreer/min,Nm三个变量值均指的是电机输出轴
其中motor_state[id_num-1][0]表示id_num号电机的角度motor_state[id_num-1][1]表示id_num号电机的速度motor_state[id_num-1][2]表示id_num号电机的输出扭矩
@param id_num 需要读取的电机编号 注意该指令id_num不能为0
"""
global READ_FLAG, ERROR_FLAG, motor_state
try:
if id_num <= MOTOR_NUM:
READ_FLAG = 0
rdata = receive_data()
# [0x08 mode cmd_data[1] cmd_data[0] id_num data0 data1 data2 data3 data4 data5 data6 data7]
if READ_FLAG == 1 and rdata[1] == 2:
cmd_data = [rdata[3], rdata[2]]
id_num = rdata[3] # 电机返回的数据帧中电机CAN_ID位于Bit8~Bit15
data = rdata[5:]
motor_state[id_num - 1][0] = uint_to_float((data[0] << 8) + data[1], P_MIN, P_MAX, 16) * RAD_DEG
motor_state[id_num - 1][1] = uint_to_float((data[2] << 8) + data[3], V_MIN, V_MAX, 16) * RAD_S_R_MIN
motor_state[id_num - 1][2] = uint_to_float((data[4] << 8) + data[5], T_MIN, T_MAX, 16)
motor_state[id_num - 1][3] = ((data[6] << 8) + data[7]) * 0.1
if cmd_data[1] & 0x3F:
motor_state[id_num - 1][4] = 1
ERROR_FLAG = '状态异常:'
if cmd_data[1] & (0x01 << 0):
ERROR_FLAG = ERROR_FLAG + '\n' + "⽋压故障"
if cmd_data[1] & (0x01 << 1):
ERROR_FLAG = ERROR_FLAG + '\n' + "过流"
if cmd_data[1] & (0x01 << 2):
ERROR_FLAG = ERROR_FLAG + '\n' + "过温"
if cmd_data[1] & (0x01 << 3):
ERROR_FLAG = ERROR_FLAG + '\n' + "磁编码故障"
if cmd_data[1] & (0x01 << 4):
ERROR_FLAG = ERROR_FLAG + '\n' + "HALL编码故障"
if cmd_data[1] & (0x01 << 5):
ERROR_FLAG = ERROR_FLAG + '\n' + "未标定"
print(ERROR_FLAG)
else:
ERROR_FLAG = '状态正常'
motor_state[id_num - 1][4] = 0
mode_status = (cmd_data[1] >> 6) & 0x03
# if mode_status == 0:
# print("当前模式状态为 Reset 模式")
# elif mode_status == 1:
# print("当前模式状态为 Cali 模式")
# elif mode_status == 2:
# print("当前模式状态为 Motor 模式")
motor_state[id_num - 1][5] = mode_status
except Exception as e:
print("---error in reply_state--", e)
# 设置运动模式
def set_mode(id_num=1, mode=0):
"""设置电机模式。
设置电机进入不同的控制模式
Args:
id_num: 需要设置的电机ID编号
mode: 电机模式编号
mode = 0: 运控模式
mode = 1: 位置模式
mode = 2: 速度模式
mode = 3: 电流模式
Returns:
Raises:
"""
write_property(id_num=id_num, index=0x7005, value=mode, data_type='u8')
# 电机使能
def motor_enable(id_num=1):
"""电机使能运行函数
电机使能运行
Args:
id_num: 需要使能运行的电机ID编号
Returns:
Raises:
"""
master_id = 0
cmd_data = [0] * 2
cmd_data[0] = master_id & 0xFF
tx_data = [0] * 8
for i in range(8):
tx_data[i] = 0x00
send_command(id_num=id_num, cmd_mode=3, cmd_data=cmd_data, data=tx_data, rtr=0) # 需要用扩展帧(数据帧)进行发送
reply_state(id_num=id_num)
"""
电机控制函数用户使用
"""
# 位置控制
def set_angle(id_num=1, angle=0, speed=0, limit_cur=27):
"""电机角度控制函数。
控制指定电机编号的电机按照指定的速度转动到指定的角度
Args:
id_num: 需要设置的电机ID编号
angle: 电机转动角度()
speed: 最大速度限制或前馈速度0~300r/min
limit_cur:电流限制0-27A
"""
motor_enable(id_num=id_num)
set_mode(id_num=id_num, mode=1)
write_property(id_num=id_num, index=0x7018, value=limit_cur, data_type='f')
write_property(id_num=id_num, index=0x7017, value=speed * R_MIN_RAD_S, data_type='f')
write_property(id_num=id_num, index=0x7016, value=angle * DEG_RAD, data_type='f')
# 速度控制
def set_speed(id_num=1, speed=10, limit_cur=27):
"""电机速度控制函数。
控制指定电机编号的电机按照指定的速度连续整周转动
Args:
id_num: 需要设置的电机ID编号
speed: 目标速度-300~300r/min
limit_cur:电流限制0-27A
"""
motor_enable(id_num=id_num)
set_mode(id_num=id_num, mode=2)
write_property(id_num=id_num, index=0x7018, value=limit_cur, data_type='f')
write_property(id_num=id_num, index=0x700A, value=speed * R_MIN_RAD_S, data_type='f')
# 扭矩(电流)控制
def set_torque(id_num=1, torque=0.1):
"""电机力矩(电流)闭环控制函数。
控制指定电机编号的电机输出指定的扭矩Nm
Args:
id_num: 需要设置的电机ID编号
torque: 电机输出0~12Nm
"""
motor_enable(id_num=id_num)
set_mode(id_num=id_num, mode=3)
write_property(id_num=id_num, index=0x7006, value=torque / TORQUE_CONSTANT, data_type='f')
# 阻抗控制
def impedance_control(id_num=1, pos=0, vel=0, tff=0, kp=0, kd=0):
"""运控模式电机控制指令函数。
运控模式电机控制指令 来向电机发送控制指令
Args:
id_num: 需要设置的电机ID编号
pos: 电机目标角度
vel: 电机目标速度r/min
tff: 前馈扭矩Nm)
kp: 刚度系数(rad/Nm)
kd: 阻尼系数(rad/s/Nm)
Returns:
Raises:
"---error in impedance_control---"
"""
try:
motor_enable(id_num=id_num)
set_mode(id_num=id_num, mode=0)
cmd_data = [0] * 2
cmd_data[0] = (float_to_uint(tff, T_MIN, T_MAX, 16)) & 0xFF # 阻抗控制里都是高位在前,低位在后,不满足小端排序
cmd_data[1] = ((float_to_uint(tff, T_MIN, T_MAX, 16)) >> 8) & 0xFF
tx_data = [0] * 8
tx_data[0] = (float_to_uint(pos * DEG_RAD, P_MIN, P_MAX, 16) >> 8) & 0xFF
tx_data[1] = (float_to_uint(pos * DEG_RAD, P_MIN, P_MAX, 16)) & 0xFF
tx_data[2] = (float_to_uint(vel * R_MIN_RAD_S, V_MIN, V_MAX, 16) >> 8) & 0xFF
tx_data[3] = (float_to_uint(vel * R_MIN_RAD_S, V_MIN, V_MAX, 16)) & 0xFF
tx_data[4] = (float_to_uint(kp, KP_MIN, KP_MAX, 16) >> 8) & 0xFF
tx_data[5] = (float_to_uint(kp, KP_MIN, KP_MAX, 16)) & 0xFF
tx_data[6] = (float_to_uint(kd, KD_MIN, KD_MAX, 16) >> 8) & 0xFF
tx_data[7] = (float_to_uint(kd, KD_MIN, KD_MAX, 16)) & 0xFF
send_command(id_num=id_num, cmd_mode=1, cmd_data=cmd_data, data=tx_data, rtr=0) # 需要用扩展帧(数据帧)进行发送
reply_state(id_num=id_num)
except Exception as e:
print("---error in impedance_control--", e)
# 电机停止运行(急停)
def motor_estop(id_num=1):
"""停止运行函数
控制电机停止运行
Args:
id_num: 需要停止运行的电机ID编号
Returns:
Raises:
"""
master_id = 0
cmd_data = [0] * 2
cmd_data[0] = master_id & 0xFF
tx_data = [0] * 8
for i in range(8):
tx_data[i] = 0x00
send_command(id_num=id_num, cmd_mode=4, cmd_data=cmd_data, data=tx_data, rtr=0) # 需要用扩展帧(数据帧)进行发送
reply_state(id_num=id_num)
# 设置零点
def set_zero_position(id_num=1):
"""设置电机零点位置函数
设置电机机械零点位置会把当前电机位置设为机械零位
Args:
id_num: 需要设置的电机ID编号
Returns:
Raises:
"""
mode_status = motor_state[id_num - 1][5]
motor_estop(id_num=id_num)
master_id = 0
cmd_data = [0] * 2
cmd_data[0] = master_id & 0xFF
tx_data = [0] * 8
tx_data[0] = 0x01
send_command(id_num=id_num, cmd_mode=6, cmd_data=cmd_data, data=tx_data, rtr=0) # 需要用扩展帧(数据帧)进行发送,不能用远程帧
reply_state(id_num=id_num)
if mode_status == 2:
motor_enable(id_num=id_num)
# 清除错误
def clear_error(id_num=1):
"""清除错误函数
一旦电机运行过程中出现任何错误, 如果要恢复正常控制模式需要用clear_error清除错误
Args:
id_num: 需要清除错误标志的电机ID编号
Returns:
Raises:
"""
global ERROR_FLAG
ERROR_FLAG = '状态正常'
master_id = 0
cmd_data = [0] * 2
cmd_data[0] = master_id & 0xFF
tx_data = [0] * 8
tx_data[0] = 0x01
send_command(id_num=id_num, cmd_mode=4, cmd_data=cmd_data, data=tx_data, rtr=0) # 需要用扩展帧(数据帧)进行发送
reply_state(id_num=id_num)
# 设置电机CAN ID
def set_id(id_num=1, new_id=1):
"""设置电机ID号。
改变电机CAN_ID号掉电保存,更改当前电机CAN_ID ,
Args:
id_num: 需要重新设置编号的电机编号,如果不知道当前电机编号可以用0广播但是这时总线上只能连一个电机否则多个电机会被设置成相同编号
new_id: 预设ID
Returns:
True: 设置成功
False:设置失败
Raises:
"""
global MCU_ID
motor_estop(id_num=id_num) # 修改ID号必须在电机模式下进行 否则无法设置成功
time.sleep(0.1) # 等待一会,需要保存
get_id(id_num=id_num)
master_id = 0
cmd_data = [0] * 2
cmd_data[1] = new_id & 0xFF
cmd_data[0] = master_id & 0xFF # 预设置CAN_ID
if len(MCU_ID) == 8:
tx_data = MCU_ID
send_command(id_num=id_num, cmd_mode=7, cmd_data=cmd_data, data=tx_data, rtr=0) # 需要用扩展帧(数据帧)进行发送
time.sleep(0.1) # 等待一会,需要保存
reply_state(id_num=id_num)
return True
else:
print("set_id to " + str(new_id) + " 失败!")
return False
# 恢复出厂设置
def init_config(id_num=1):
"""将电机参数恢复至出厂设置函数
如果想将所有配置参数恢复至出厂设置可以调用该函数默认情况下恢复出厂设置后CAN_ID会恢复成127为了方便使用该函数自动将其改回原来的id_num
Args:
id_num: 需要修改的电机ID编号
Returns:
Raises:
"""
master_id = 0
cmd_data = [0] * 2
cmd_data[1] = 0x03
cmd_data[0] = master_id & 0xFF
tx_data = [0] * 8
for i in range(8):
tx_data[i] = 0x00
send_command(id_num=id_num, cmd_mode=8, cmd_data=cmd_data, data=tx_data, rtr=0) # 需要用扩展帧(数据帧)进行发送
print("恢复出厂设置中。。。。。请稍等3s之后再继续操作")
time.sleep(3.0)
set_id(127, id_num)
print("恢复出厂设置成功!")
# 设置参数
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def write_property(id_num=1,
index=0,
data_type='f',
value: Union[int, float] = 0):
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"""修改电机属性参数
修改电机属性参数这里的属性参数为电机控制参数
Args:
id_num: 需要修改的电机ID编号
index: 需要读取的参数地址
data_type: 需要写入的参数数据类型f:float,'u16':uint16,'s16':int16,'u32':uint32,'s32':int32,'u8':uint8,'s8':'int8'
value: 对应参数数据
Returns:
Raises:
"""
master_id = 0
cmd_data = [0] * 2
cmd_data[0] = master_id & 0xFF
tx_data = [0] * 8
tx_data[0] = index & 0xFF
tx_data[1] = (index >> 8) & 0xFF
value = value
cmd_mode = 18
if index < 0x7000:
cmd_mode = 8
type_list = ['u8', 's8', 'u16', 's16', 'u32', 's32', 'f']
tx_data[2] = type_list.index(data_type)
tx_data[4:] = format_data(data=[value], format=data_type, type="encode")
send_command(id_num=id_num, cmd_mode=cmd_mode, cmd_data=cmd_data, data=tx_data, rtr=0) # 需要用扩展帧(数据帧)进行发送
reply_state(id_num=id_num)
if cmd_mode == 8: # 永久保存
motor_estop(id_num=id_num) # 永久保存时,也需要先进入待机模式
cmd_data[1] = 0x02
tx_data = [0] * 8
send_command(id_num=id_num, cmd_mode=cmd_mode, cmd_data=cmd_data, data=tx_data, rtr=0) # 需要用扩展帧(数据帧)进行发送
time.sleep(0.1) # 等待一会,需要保存
reply_state(id_num=id_num)
# 读取参数
def read_property(id_num=1, index=0, data_type='f'):
"""读取电机属性参数
读取电机属性参数这里的属性参数包括电机状态量及电机控制参数
Args:
id_num: 需要修改的电机ID编号
index: 需要读取的参数地址
data_type: 需要读取的参数数据类型f:float,'u16':uint16,'s16':int16,'u32':uint32,'s32':int32,'u8':uint8,'s8':'int8'
Returns:
value: 返回对应属性参数的值
Raises:
"""
master_id = 0
cmd_data = [0] * 2
cmd_data[0] = master_id & 0xFF
tx_data = [0] * 8
tx_data[0] = index & 0xFF
tx_data[1] = (index >> 8) & 0xFF
cmd_mode = 17
if index < 0x7000:
cmd_mode = 9
type_list = ['u8', 's8', 'u16', 's16', 'u32', 's32', 'f']
tx_data[2] = type_list.index(data_type)
send_command(id_num=id_num, cmd_mode=cmd_mode, cmd_data=cmd_data, data=tx_data, rtr=0) # 需要用扩展帧(数据帧)进行发送
data = receive_data()
if READ_FLAG == 1 and (data[1] == 17 or data[1] == 9):
value = format_data(data=data[9:], format=data_type, type="decode")
return value[0]
# 获取电机ID号同时会读取电机MCU_ID
def get_id(id_num=1):
global MCU_ID
master_id = 0xFD
cmd_data = [0] * 2
cmd_data[0] = master_id & 0xFF
tx_data = [0] * 8
send_command(id_num=id_num, cmd_mode=0, cmd_data=cmd_data, data=tx_data, rtr=0) # 需要用扩展帧(数据帧)进行发送
data = receive_data()
if READ_FLAG == 1 and data[1] == 0:
MCU_ID = data[5:]
return id_num
# 读取电机当前角度及速度
def get_state(id_num=1):
"""读取电机的当前位置和速度
读取电机当前位置和速度列表单位分别为度°和转每分钟(r/min)
Args:
id_num: 需要读取的电机编号,如果不知道当前电机编号可以用0广播但是这时总线上只能连一个电机否则将报错
Returns:
[pos, vel]: 位置和速度列表
Raises:
"""
global READ_FLAG, motor_state
pos_vel = [0, 0]
try:
# 调用master_ID写入接口通过电机应答反馈帧获取实时位置和速度
write_property(id_num=id_num, index=0x7018, value=27, data_type='f')
if READ_FLAG == 1 and id_num != 0:
pos_vel[0] = round(motor_state[id_num - 1][0], 1)
pos_vel[1] = round(motor_state[id_num - 1][1], 1)
return pos_vel[:]
else:
return
except Exception as e:
print("---error in get_state---", e)
return False
# 读取电机当前电压及电流
def get_volcur(id_num=1):
"""读取电机的当前电压和电流
读取电机当前电压和q轴电流列表单位分别为伏V和安(A)
Args:
id_num: 需要读取的电机编号,如果不知道当前电机编号可以用0广播但是这时总线上只能连一个电机否则将报错
Returns:
[vol, cur]: 电压和电流列表
Raises:
"""
global READ_FLAG
vol_cur = [0, 0]
try:
vol_cur[0] = read_property(id_num=id_num, index=0x302b, data_type='f')
vol_cur[1] = read_property(id_num=id_num, index=0x301e, data_type='f')
if READ_FLAG == 1:
vol_cur[0] = round(vol_cur[0], 1) # 将单位从mV换算成V
vol_cur[1] = round(vol_cur[1], 2)
return vol_cur
else:
return
except Exception as e:
print("---error in get_volcur--", e)
return False