启动bcm的sdk,会进入一个类似shell的交互界面，在其中如入命令，可以配置交换机芯片。
本文主要记录一下命令：
1.端口限速命令
2.链路聚合命令
3.i2c控制命令
启动方法：
/tmp/bcm # ./bcm.user.proxy
“？”显示帮助信息。直接输入会显示出sdk对所有型号芯片支持的命令，以及当前所支持的命令。
BCM.0> ?
help: "??" or "help" for summary
Commands common to all modes:
? ?? ASSert BackGround BCM
BCMX Board break CASE CD
CONFig CONSole CoPy DATE DeBug
DeBugMod DELAY DEVice DIR DISPatch
Echo EXIT EXPR FLASHINIT FLASHSYNC
FOR Help HISTory IF JOBS
KILL LOCal LOG LOOP LS
MKDIR MODE MORe MoVe NOEcho
Pause PRINTENV PWD QUIT RCCache
RCLoad REBOOT REName RESET RM
RMDIR SalProfile SAVE SET SETENV
SHell SLeep TIME Version
Commands for current mode:
AGE Attach Auth BIST BPDU
BTiMeout CABLEdiag CACHE CellHDR CHecK
CLEAR COLOR COMBO COS CounTeR
CustomSTAT DELete DETach DMA DmaRomTest
DMIRror DSCP DTAG Dump EditReg
EGRess EthernetAV FieldProcessor Getreg GPORT
H2HIGIG H2HIGIG2 HASH HeaderMode INIT
Insert INTR IPFIX IPG KNETctrl
L2 L2MODE LED LINKscan LISTmem
Listreg LOOKup MCAST MemSCAN MemWatch
MIRror MODify ModMap Modreg MTiMeout
MultiCast OAM PacketWatcher PBMP PHY
POP PORT PortRate PortSampRate PortStat
PROBE PUSH PUTREG PVlan RATE
RateBw RegCMp REMove RXCfg RXInit
RXMon SCHan SEArch Setreg SHOW
SOC STACKMode StackPortGet StackPortSet STG
STiMeout STKMode SwitchControl SystemSnake TestClear
TestList TestMode TestParameters TestRun TestSelect
TRUNK TX TXCount TXSTArt TXSTOp
VLAN WARMBOOT Write XAUI
### 1.portrate设置端口限速
BCM.0> portrate ?
Usage (PortRate): Set/Display port rate metering characteristics.
Parameters: <pbm> [ingress|egress|pause [arg1 arg2]]
For Ingress or Egress: arg1 is rate, arg2 is max_burst
For Pause: arg1 is pause_thresh, arg2 is resume_thresh
rate is in kilobits (1000 bits) per second
max_burst and xxx_thresh are in kilobits (1000 bits)
# 设置端口1的入口速率最大为1000，burst是有关qos相关的参数。
BCM.0> portrate ge0 ingress 1000
PortRate: Error: missing port burst size
BCM.0> portrate ge0 ingress 1000 1000
# 显示所设置的端口参数，可以看出与设置的有些不同，因该是进行了转化
BCM.0> portrate
ge0: Ingress meter: 1024 kbps 1031 kbits max burst.
### 2.trunk 设置链路聚合
BCM.0> trunk
Usage (TRUNK): Usages:
trunk init
- Initialize trunking function
trunk deinit
- Deinitialize trunking function
trunk add <Id=val> <Rtag=val> <Pbmp=val>
- Add ports to a trunk
trunk remove <Id=val> <Pbmp=val>
- Remove ports from a trunk
trunk show [<Id=val>]
- Display trunk information
trunk egress [<Id=val>] <Pbmp=val>
- Set egress ports for trunk
trunk mcast <Id=val> <Mac=val> <Vlan=val>
- Join multicast to a trunk
trunk hash set <Pbmp=val> <HashValue=val>
- Set ingress port hash value to select egress port of a trunk
trunk hash get <Pbmp=val>
- Get ingress port programmable hash value
trunk psc <Id=val> <Rtag=val>
- Change Rtag (for testing ONLY)
# rtag指定链路聚合的负载分担方式。当设置2台交换机都配置为srcmac,destmac的时候，
# 再通过测试卡进行发包测试，发送和接收都不会丢包，
# 但是2两台交换机中有一台配置为srcdestmac的时候就会丢一半的包，正在查原因。
BCM.0> trunk add id=1 rtag=1 pbmp=ge0,ge1
BCM.0> trunk add id=2 rtag=2 pbmp=ge2,ge3
BCM.0> trunk add id=3 rtag=3 pbmp=ge4,ge5
# 查看链路聚合的设置
BCM.0> trunk show
Device supports 8 trunk groups:
8 front panel trunks (0..7), 8 ports/trunk
trunk 1: (front panel, 2 ports)=ge0,ge1 dlf=any mc=any ipmc=any psc=srcmac (0x1)
trunk 2: (front panel, 2 ports)=ge2,ge3 dlf=any mc=any ipmc=any psc=destmac (0x2)
trunk 3: (front panel, 2 ports)=ge4,ge5 dlf=any mc=any ipmc=any psc=srcdestmac (0x3)
### 3.i2c命令
BCM.0> i2c ?
Usage (I2C): Usages:
i2c probe [pio|intr] [speed] [quiet]
- probe devices on I2C bus and build device tree.
If "intr" or "pio" is specified, change to that bus mode.
If a valid speed is specified, change the bus to that speed.
If "quiet" is specified, suppresses probe output.
i2c scan [pio|intr] [saddr] [quiet]
- Scan devices on I2C bus and display the device list.
i2c log
- show I2C bus transaction log.
i2c backlog
- show I2C bus transaction log (in reverse order).
i2c clearlog
- reset I2C bus transaction log.
i2c reset
- reset I2C bus controller core.
i2c speeds
- show supported I2C bus controller clock rates.
i2c show
- show devices found and their attributes.
i2c read saddr comm len
- generic interface to read devices, do probe first
i2c readb saddr len
- generic interface to read devices without register based access, do probe first
i2c write saddr comm [data]
- generic interface to write a byte to devices, do probe first
- comm is data when writing directly otherwise command register
# 操作i2c之前，都需要先输入i2c probe
BCM.0> i2c probe
Yet to Implement soc_i2c_write_word_data
Yet to Implement soc_i2c_write_word_data
I2C: detected 2 devices
# 扫描i2c设备
BCM.0> i2c scan
I2C device found at slave address 0X20 (lpt0: PCF8574 MUX control)
I2C device found at slave address 0X32 (Unknown)
I2C device found at slave address 0X48 (temp0: LM75 Temperature Sensor)
I2C device found at slave address 0X77 (PCA9548 MUX)
# 0x32的设备地址是SD2405时钟芯片。读取时钟芯片秒寄存器的值
BCM.0> i2c read 0x32 0x00 1
00: 18
# 读取秒寄存器和分寄存器的值
BCM.0> i2c read 0x32 0x00 2
00: 31 35
查看sdk/src/appl/diag/目录中的文件就可以了解对应的命令的实现。
例如i2c_cmds.c文件。