yezhong yezhong / yezhong_main_controller_copy_1

1

Dependencies:   mcp2515 mbed-dev-f303

CAN/CAN.cpp@2:cd74a8cb03b0, 2020-11-19 (annotated)

Committer:
yezhong
Date:
Thu Nov 19 07:59:28 2020 +0000
Revision:
2:cd74a8cb03b0
Parent:
0:d80c66cb1b3a
Child:
3:940a9e40d327
11

Who changed what in which revision?

UserRevisionLine numberNew contents of line
panzhan 0:d80c66cb1b3a 1 #include "CAN.h"
panzhan 0:d80c66cb1b3a 2 #include "used_leg_message.h"
panzhan 0:d80c66cb1b3a 3
panzhan 0:d80c66cb1b3a 4
panzhan 0:d80c66cb1b3a 5
panzhan 0:d80c66cb1b3a 6 //定义设备
yezhong 2:cd74a8cb03b0 7 CAN pf_can(PB_8, PB_9); // CAN Rx pin name, CAN Tx pin name
yezhong 2:cd74a8cb03b0 8 CAN df_can(PB_12, PB_13); // CAN Rx pin name, CAN Tx pin name
panzhan 0:d80c66cb1b3a 9 // 定义CAN消息
yezhong 2:cd74a8cb03b0 10 CANMessage pf_rxMsg, df_rxMsg; // 主控收到的CAN消息
yezhong 2:cd74a8cb03b0 11 CANMessage PF_can, DF_can; // 主控发送的CAN消息
panzhan 0:d80c66cb1b3a 12
panzhan 0:d80c66cb1b3a 13 //=================================函数=======================================//
panzhan 0:d80c66cb1b3a 14
panzhan 0:d80c66cb1b3a 15 /// 将控制参数打包入CAN消息中
panzhan 0:d80c66cb1b3a 16 /// CAN Command Packet Structure
panzhan 0:d80c66cb1b3a 17 /// 16 bit position command, between -4*pi and 4*pi
panzhan 0:d80c66cb1b3a 18 /// 12 bit velocity command, between -30 and + 30 rad/s
panzhan 0:d80c66cb1b3a 19 /// 12 bit kp, between 0 and 500 N-m/rad
panzhan 0:d80c66cb1b3a 20 /// 12 bit kd, between 0 and 100 N-m*s/rad
panzhan 0:d80c66cb1b3a 21 /// 12 bit feed forward torque, between -18 and 18 N-m
panzhan 0:d80c66cb1b3a 22 /// CAN Packet is 8 8-bit words
panzhan 0:d80c66cb1b3a 23 /// Formatted as follows. For each quantity, bit 0 is LSB
panzhan 0:d80c66cb1b3a 24 /// 0: [position[15-8]]
panzhan 0:d80c66cb1b3a 25 /// 1: [position[7-0]]
panzhan 0:d80c66cb1b3a 26 /// 2: [velocity[11-4]]
panzhan 0:d80c66cb1b3a 27 /// 3: [velocity[3-0], kp[11-8]]
panzhan 0:d80c66cb1b3a 28 /// 4: [kp[7-0]]
panzhan 0:d80c66cb1b3a 29 /// 5: [kd[11-4]]
panzhan 0:d80c66cb1b3a 30 /// 6: [kd[3-0], torque[11-8]]
panzhan 0:d80c66cb1b3a 31 /// 7: [torque[7-0]]
panzhan 0:d80c66cb1b3a 32 void pack_cmd(CANMessage * msg, joint_control joint){
panzhan 0:d80c66cb1b3a 33
panzhan 0:d80c66cb1b3a 34 /// limit data to be within bounds ///
panzhan 0:d80c66cb1b3a 35 float p_des = fminf(fmaxf(P_MIN, joint.p_des), P_MAX);
panzhan 0:d80c66cb1b3a 36 float v_des = fminf(fmaxf(V_MIN, joint.v_des), V_MAX);
panzhan 0:d80c66cb1b3a 37 float kp = fminf(fmaxf(KP_MIN, joint.kp), KP_MAX);
panzhan 0:d80c66cb1b3a 38 float kd = fminf(fmaxf(KD_MIN, joint.kd), KD_MAX);
panzhan 0:d80c66cb1b3a 39 float t_ff = fminf(fmaxf(T_MIN, joint.t_ff), T_MAX);
panzhan 0:d80c66cb1b3a 40 /// convert floats to unsigned ints ///
panzhan 0:d80c66cb1b3a 41 uint16_t p_int = float_to_uint(p_des, P_MIN, P_MAX, 16);
panzhan 0:d80c66cb1b3a 42 uint16_t v_int = float_to_uint(v_des, V_MIN, V_MAX, 12);
panzhan 0:d80c66cb1b3a 43 uint16_t kp_int = float_to_uint(kp, KP_MIN, KP_MAX, 12);
panzhan 0:d80c66cb1b3a 44 uint16_t kd_int = float_to_uint(kd, KD_MIN, KD_MAX, 12);
panzhan 0:d80c66cb1b3a 45 uint16_t t_int = float_to_uint(t_ff, T_MIN, T_MAX, 12);
panzhan 0:d80c66cb1b3a 46 /// pack ints into the can buffer ///
panzhan 0:d80c66cb1b3a 47 msg->data[0] = p_int>>8;
panzhan 0:d80c66cb1b3a 48 msg->data[1] = p_int&0xFF;
panzhan 0:d80c66cb1b3a 49 msg->data[2] = v_int>>4;
panzhan 0:d80c66cb1b3a 50 msg->data[3] = ((v_int&0xF)<<4)|(kp_int>>8);
panzhan 0:d80c66cb1b3a 51 msg->data[4] = kp_int&0xFF;
panzhan 0:d80c66cb1b3a 52 msg->data[5] = kd_int>>4;
panzhan 0:d80c66cb1b3a 53 msg->data[6] = ((kd_int&0xF)<<4)|(t_int>>8);
panzhan 0:d80c66cb1b3a 54 msg->data[7] = t_int&0xff;
panzhan 0:d80c66cb1b3a 55 }
panzhan 0:d80c66cb1b3a 56
panzhan 0:d80c66cb1b3a 57
panzhan 0:d80c66cb1b3a 58 // 多个控制器联合打包准备发送
panzhan 0:d80c66cb1b3a 59 void PackAll(){
yezhong 2:cd74a8cb03b0 60 pack_cmd(&PF_can, a_control.pf);
yezhong 2:cd74a8cb03b0 61 pack_cmd(&DF_can, a_control.df);
panzhan 0:d80c66cb1b3a 62 }
panzhan 0:d80c66cb1b3a 63
panzhan 0:d80c66cb1b3a 64
panzhan 0:d80c66cb1b3a 65 // 写联合打包的数据
panzhan 0:d80c66cb1b3a 66 void WriteAll(){
yezhong 2:cd74a8cb03b0 67 pf_can.write(PF_can);
panzhan 0:d80c66cb1b3a 68 wait(.00002);
yezhong 2:cd74a8cb03b0 69 df_can.write(DF_can);
panzhan 0:d80c66cb1b3a 70 wait(.00002);
panzhan 0:d80c66cb1b3a 71 }
panzhan 0:d80c66cb1b3a 72
panzhan 0:d80c66cb1b3a 73
panzhan 0:d80c66cb1b3a 74 /// 提取信息并存入状态结构体
panzhan 0:d80c66cb1b3a 75 /// CAN Reply Packet Structure
panzhan 0:d80c66cb1b3a 76 /// 16 bit position, between -4*pi and 4*pi
panzhan 0:d80c66cb1b3a 77 /// 12 bit velocity, between -30 and + 30 rad/s
panzhan 0:d80c66cb1b3a 78 /// 12 bit current, between -40 and 40;
panzhan 0:d80c66cb1b3a 79 /// CAN Packet is 5 8-bit words
panzhan 0:d80c66cb1b3a 80 /// Formatted as follows. For each quantity, bit 0 is LSB
panzhan 0:d80c66cb1b3a 81 /// 0: [position[15-8]]
panzhan 0:d80c66cb1b3a 82 /// 1: [position[7-0]]
panzhan 0:d80c66cb1b3a 83 /// 2: [velocity[11-4]]
panzhan 0:d80c66cb1b3a 84 /// 3: [velocity[3-0], current[11-8]]
panzhan 0:d80c66cb1b3a 85 /// 4: [current[7-0]]
yezhong 2:cd74a8cb03b0 86 void unpack_reply(CANMessage msg, ankle_state * ankle){
panzhan 0:d80c66cb1b3a 87 /// unpack ints from can buffer ///
panzhan 0:d80c66cb1b3a 88 uint16_t id = msg.data[0];
panzhan 0:d80c66cb1b3a 89 uint16_t p_int = (msg.data[1]<<8)|msg.data[2];
panzhan 0:d80c66cb1b3a 90 uint16_t v_int = (msg.data[3]<<4)|(msg.data[4]>>4);
panzhan 0:d80c66cb1b3a 91 uint16_t i_int = ((msg.data[4]&0xF)<<8)|msg.data[5];
panzhan 0:d80c66cb1b3a 92 /// convert uints to floats ///
panzhan 0:d80c66cb1b3a 93 float p = uint_to_float(p_int, P_MIN, P_MAX, 16);
panzhan 0:d80c66cb1b3a 94 float v = uint_to_float(v_int, V_MIN, V_MAX, 12);
panzhan 0:d80c66cb1b3a 95 float t = uint_to_float(i_int, -T_MAX, T_MAX, 12);
yezhong 2:cd74a8cb03b0 96
panzhan 0:d80c66cb1b3a 97
panzhan 0:d80c66cb1b3a 98 if(id==0x01){
yezhong 2:cd74a8cb03b0 99 ankle->pf.p = p;
yezhong 2:cd74a8cb03b0 100 ankle->pf.v = v;
yezhong 2:cd74a8cb03b0 101 ankle->pf.t = t;
panzhan 0:d80c66cb1b3a 102 }
panzhan 0:d80c66cb1b3a 103 else if(id==0x01){
yezhong 2:cd74a8cb03b0 104 ankle->df.p = p;
yezhong 2:cd74a8cb03b0 105 ankle->df.v = v;
yezhong 2:cd74a8cb03b0 106 ankle->df.t = t;
panzhan 0:d80c66cb1b3a 107 }
panzhan 0:d80c66cb1b3a 108 }
panzhan 0:d80c66cb1b3a 109
panzhan 0:d80c66cb1b3a 110
panzhan 0:d80c66cb1b3a 111
panzhan 0:d80c66cb1b3a 112
panzhan 0:d80c66cb1b3a 113