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DDR5生态系统的核心是SidebandBus Protocol
参考下图#xff0c;可以将SV4E-I3C的端口1声明为主服务器(模拟主机控制器)#xff0c;并且它可以属于SV4E-I3C上的一个总线。端口2可以作为SPD Hub DUT的Local Bus侧的从站连接。这个从站可以被…JEDEC DDR5 SPD Hub Devices例程
DDR5生态系统的核心是SidebandBus Protocol
参考下图可以将SV4E-I3C的端口1声明为主服务器(模拟主机控制器)并且它可以属于SV4E-I3C上的一个总线。端口2可以作为SPD Hub DUT的Local Bus侧的从站连接。这个从站可以被编程来模拟端口2属于SV4E-I3C上的第二个总线并且独立于端口1进行编程。SV4E-I3C的端口3和4也可以连接到SPD集线器的本地总线侧它们可以用来模拟PMIC和/或RCD设备。这些端口属于SV4E-I3C上的同一第二条总线。这些端口的可用性为SPD Hub执行地址修改等功能提供了完整的覆盖范围。 图片来源《EN-W002E-E-21090-Component-Validation-of-JEDEC-DDR5-SPD-Hub-Devices》
以下所有例程SV4E-I3C设备连接器件均为SPD5芯片Reg表示MR寄存器Mem表示NVM存储器
1、I2C模式读Reg
SV4E-I3C设备在i2c模式下读SPD5的Reg(MR寄存器)Python代码如下
i3cDataCapture.start()
sidebandBusController.setup()
regAddr 0x00
byte_num 64
sidebandBusController.enableLowBitRateMode()
bytesFromTarget sidebandBusController.spdLegacyReadReg(DIMM0-SPD, regAddr, numBytes byte_num, twoByteAddressingFalse)
for value in range(int(regAddr),int(byte_numregAddr)):print(regAddr: 0x%02X mrbyte: 0x%02X % (value, bytesFromTarget[(value-(int(regAddr)))]))
i3cDataCapture.stop()Procedure区域编辑代码点击Run运行如图LOG区域已经打印运行结果 打开生成的波形结果如图 2、I3C模式读Reg
SV4E-I3C设备在i3c模式下读SPD5的Reg(MR寄存器)Python代码如下
import dftm.svt as svt
i3cDataCapture.start()
sidebandBusController.setup()
regAddr 0x00
byte_num 64
sidebandBusController.enableLowBitRateMode()
status sidebandBusController.doBroadcastWrite(SETAASA)
if status True:svt.printMsg(SETAASA CCC PASS, green)
else:svt.printMsg(SETAASA CCC FAIL, red)
sidebandBusController.disableLowBitRateMode()
bytesFromTarget sidebandBusController.spdReadReg(DIMM0-SPD, regAddr, numBytes byte_num)
for value in range(int(regAddr),int(byte_numregAddr)):print(regAddr: 0x%02X mrbyte: 0x%02X % (value, bytesFromTarget[(value-(int(regAddr)))]))
status sidebandBusController.doBroadcastWrite(RSTDAA)
if status True:svt.printMsg(RSTDAA CCC PASS, green)
else:svt.printMsg(RSTDAA CCC FAIL, red)
i3cDataCapture.stop()Procedure区域编辑代码点击Run运行LOG区域已经打印运行结果如图所示 打开生成的波形结果如图 3、使能ENEC获取器件状态
3、4、5部分的工作主要是测试SV4E-I3C设备的PEC注错功能PEC注错方式有多种这里仅对sidebandBusController.startPecErrorInjection()进行测试首先使能ENEC但是pecEnable为False(如图sidebandBusController部分的参数设置)Python代码如下
import dftm.svt as svt
i3cDataCapture.start()
sidebandBusController.setup()
sidebandBusController.initializeBus()
status sidebandBusController.doBroadcastWrite(SETAASA)
if status True:svt.printMsg(SETAASA CCC PASS, green)
else:svt.printMsg(SETAASA CCC FAIL, red)
sidebandBusController.disableLowBitRateMode()
status sidebandBusController.doBroadcastWrite(ENEC, cccDefiningBytes [0x01])
if status True:svt.printMsg(ENEC CCC PASS, green)
else:svt.printMsg(ENEC CCC FAIL, red)
targetAddr DIMM0-SPD
regAddr 0x0C
dataByte 0x01 # one byte
status sidebandBusController.spdWriteReg(targetAddr, regAddr, dataByte)
if status True:svt.printMsg(spdWriteReg PASS, green)
else:svt.printMsg(spdWriteReg FAIL, red)
statusTuple sidebandBusController.getTargetStatus(DIMM0-SPD)
if statusTuple is not None:(pecErr, protocolErr, pendingInterrupt) statusTupleprint(pecErr: 0x%02X protocolErr: 0x%02X pendingInterrupt: 0x%02X % (pecErr, protocolErr, pendingInterrupt))
status sidebandBusController.doBroadcastWrite(RSTDAA)
if status True:svt.printMsg(RSTDAA CCC PASS, green)
else:svt.printMsg(RSTDAA CCC FAIL, red)
i3cDataCapture.stop()Procedure区域编辑代码点击Run运行如图 打开生成的波形结果如图 4、使能ENEC使能PEC获取器件状态
接下来pecEnable为True(如图sidebandBusController部分的参数设置)Python代码如下
import dftm.svt as svt
i3cDataCapture.start()
sidebandBusController.setup()
sidebandBusController.initializeBus()
status sidebandBusController.doBroadcastWrite(SETAASA)
if status True:svt.printMsg(SETAASA CCC PASS, green)
else:svt.printMsg(SETAASA CCC FAIL, red)
sidebandBusController.disableLowBitRateMode()
status sidebandBusController.doBroadcastWrite(ENEC, cccDefiningBytes [0x01])
if status True:svt.printMsg(ENEC CCC PASS, green)
else:svt.printMsg(ENEC CCC FAIL, red)
targetAddr DIMM0-SPD
regAddr 0x0C
dataByte 0x01 # one byte
status sidebandBusController.spdWriteReg(targetAddr, regAddr, dataByte)
if status True:svt.printMsg(spdWriteReg PASS, green)
else:svt.printMsg(spdWriteReg FAIL, red)
statusTuple sidebandBusController.getTargetStatus(DIMM0-SPD)
if statusTuple is not None:(pecErr, protocolErr, pendingInterrupt) statusTupleprint(pecErr: 0x%02X protocolErr: 0x%02X pendingInterrupt: 0x%02X % (pecErr, protocolErr, pendingInterrupt))
status sidebandBusController.doBroadcastWrite(RSTDAA)
if status True:svt.printMsg(RSTDAA CCC PASS, green)
else:svt.printMsg(RSTDAA CCC FAIL, red)
i3cDataCapture.stop()代码没有改变点击Run运行如图 打开生成的波形结果对比与刚刚生成的结果由于使能PEC故结果中包含pec byte 5、使能ENEC使能PEC注入PEC错误获取器件状态
然后开始注入PEC errorPython代码如下
import dftm.svt as svt
i3cDataCapture.start()
sidebandBusController.setup()
sidebandBusController.initializeBus()
status sidebandBusController.doBroadcastWrite(SETAASA)
if status True:svt.printMsg(SETAASA CCC PASS, green)
else:svt.printMsg(SETAASA CCC FAIL, red)
sidebandBusController.disableLowBitRateMode()
status sidebandBusController.doBroadcastWrite(ENEC, cccDefiningBytes [0x01])
if status True:svt.printMsg(ENEC CCC PASS, green)
else:svt.printMsg(ENEC CCC FAIL, red)
sidebandBusController.startPecErrorInjection()
targetAddr DIMM0-SPD
regAddr 0x0C
dataByte 0x01 # one byte
status sidebandBusController.spdWriteReg(targetAddr, regAddr, dataByte)
if status True:svt.printMsg(spdWriteReg PASS, green)
else:svt.printMsg(spdWriteReg FAIL, red)
sidebandBusController.stopPecErrorInjection()
statusTuple sidebandBusController.getTargetStatus(DIMM0-SPD)
if statusTuple is not None:(pecErr, protocolErr, pendingInterrupt) statusTupleprint(pecErr: 0x%02X protocolErr: 0x%02X pendingInterrupt: 0x%02X % (pecErr, protocolErr, pendingInterrupt))
status sidebandBusController.doBroadcastWrite(RSTDAA)
if status True:svt.printMsg(RSTDAA CCC PASS, green)
else:svt.printMsg(RSTDAA CCC FAIL, red)
i3cDataCapture.stop()
Procedure区域编辑代码点击Run运行如图LOG区域已经打印运行结果 打开生成的波形结果如图在写Reg时注入错误的PEC byte ibi payload自动完成如图所示 6、使能ENEC未注入parity错误获取器件状态
6、7部分的工作主要是测试SV4E-I3C设备的parity注错功能这里对sidebandBusController.startErrorInjection(errorSpecs)进行测试首先是未进行parity注错Python代码如下
import dftm.svt as svt
i3cDataCapture.start()
sidebandBusController.setup()
sidebandBusController.enableLowBitRateMode()
status sidebandBusController.doBroadcastWrite(SETAASA)
if status True:svt.printMsg(SETAASA CCC PASS, green)
else:svt.printMsg(SETAASA CCC FAIL, red)
sidebandBusController.disableLowBitRateMode()
status sidebandBusController.doBroadcastWrite(ENEC, cccDefiningBytes [0x01])
if status True:svt.printMsg(ENEC CCC PASS, green)
else:svt.printMsg(ENEC CCC FAIL, red)
bytesFromTarget sidebandBusController.spdWriteReg(DIMM0-SPD, 0x00,0x00)
statusTuple sidebandBusController.getTargetStatus(DIMM0-SPD)
if statusTuple is not None:(pecErr, protocolErr, pendingInterrupt) statusTupleprint(pecErr: 0x%02X protocolErr: 0x%02X pendingInterrupt: 0x%02X % (pecErr, protocolErr, pendingInterrupt))
status sidebandBusController.doBroadcastWrite(RSTDAA)
if status True:svt.printMsg(RSTDAA CCC PASS, green)
else:svt.printMsg(RSTDAA CCC FAIL, red)
i3cDataCapture.stop()Procedure区域编辑代码点击Run运行如图LOG区域已经打印运行结果 打开生成的波形结果如图 7、使能ENEC注入parity错误获取器件状态
注入parity错误Python代码如下
import dftm.svt as svt
i3cDataCapture.start()
sidebandBusController.setup()
sidebandBusController.enableLowBitRateMode()
status sidebandBusController.doBroadcastWrite(SETAASA)
if status True:svt.printMsg(SETAASA CCC PASS, green)
else:svt.printMsg(SETAASA CCC FAIL, red)
sidebandBusController.disableLowBitRateMode()
status sidebandBusController.doBroadcastWrite(ENEC, cccDefiningBytes [0x01])
if status True:svt.printMsg(ENEC CCC PASS, green)
else:svt.printMsg(ENEC CCC FAIL, red)
errorSpecs [ (2, 3) ]
sidebandBusController.startErrorInjection(errorSpecs)
bytesFromTarget sidebandBusController.spdWriteReg(DIMM0-SPD, 0x00,0x00)
sidebandBusController.stopErrorInjection()
statusTuple sidebandBusController.getTargetStatus(DIMM0-SPD)
if statusTuple is not None:(pecErr, protocolErr, pendingInterrupt) statusTupleprint(pecErr: 0x%02X protocolErr: 0x%02X pendingInterrupt: 0x%02X % (pecErr, protocolErr, pendingInterrupt))
status sidebandBusController.doBroadcastWrite(RSTDAA)
if status True:svt.printMsg(RSTDAA CCC PASS, green)
else:svt.printMsg(RSTDAA CCC FAIL, red)
i3cDataCapture.stop()Procedure区域编辑代码点击Run运行如图 打开生成的波形结果如图写Reg注入parity erroribi payload自动完成 8、使能ENEC注入parity错误读RegibiResponse(ackAndDisable)获取器件状态
8、9部分的工作主要是测试SV4E-I3C设备的ibiResponse设置首先controllerParams部分ibiResponse设置为ackAndDisablePython代码如下
import dftm.svt as svt
i3cDataCapture.start()
sidebandBusController.setup()
sidebandBusController.enableLowBitRateMode()
status sidebandBusController.doBroadcastWrite(SETAASA)
if status True:svt.printMsg(SETAASA CCC PASS, green)
else:svt.printMsg(SETAASA CCC FAIL, red)
sidebandBusController.disableLowBitRateMode()
status sidebandBusController.doBroadcastWrite(ENEC, cccDefiningBytes [0x01])
if status True:svt.printMsg(ENEC CCC PASS, green)
else:svt.printMsg(ENEC CCC FAIL, red)
errorSpecs [ (2, 3) ]
sidebandBusController.startErrorInjection(errorSpecs)
bytesFromTarget sidebandBusController.spdWriteReg(DIMM0-SPD, 0x00,0x00)
sidebandBusController.stopErrorInjection()
bytesFromTarget sidebandBusController.spdReadReg(DIMM0-SPD, 0x30, numBytes 5)
for value in range(int(0x30),int(50x30)):print(regAddr: 0x%02X mrbyte: 0x%02X % (value, bytesFromTarget[(value-(int(0x30)))]))
statusTuple sidebandBusController.getTargetStatus(DIMM0-SPD)
if statusTuple is not None:(pecErr, protocolErr, pendingInterrupt) statusTupleprint(pecErr: 0x%02X protocolErr: 0x%02X pendingInterrupt: 0x%02X % (pecErr, protocolErr, pendingInterrupt))
status sidebandBusController.doBroadcastWrite(RSTDAA)
if status True:svt.printMsg(RSTDAA CCC PASS, green)
else:svt.printMsg(RSTDAA CCC FAIL, red)
i3cDataCapture.stop()Procedure区域编辑代码点击Run运行如图LOG区域已经打印运行结果 打开生成的波形结果如图注意与下个波形结果进行对比 9、使能ENEC注入parity错误读RegibiResponse(ackAndProceed)获取器件状态
controllerParams部分ibiResponse设置为ackAndProceedPython代码未改变如下
import dftm.svt as svt
i3cDataCapture.start()
sidebandBusController.setup()
sidebandBusController.enableLowBitRateMode()
status sidebandBusController.doBroadcastWrite(SETAASA)
if status True:svt.printMsg(SETAASA CCC PASS, green)
else:svt.printMsg(SETAASA CCC FAIL, red)
sidebandBusController.disableLowBitRateMode()
status sidebandBusController.doBroadcastWrite(ENEC, cccDefiningBytes [0x01])
if status True:svt.printMsg(ENEC CCC PASS, green)
else:svt.printMsg(ENEC CCC FAIL, red)
errorSpecs [ (2, 3) ]
sidebandBusController.startErrorInjection(errorSpecs)
bytesFromTarget sidebandBusController.spdWriteReg(DIMM0-SPD, 0x00,0x00)
sidebandBusController.stopErrorInjection()
bytesFromTarget sidebandBusController.spdReadReg(DIMM0-SPD, 0x30, numBytes 5)
for value in range(int(0x30),int(50x30)):print(regAddr: 0x%02X mrbyte: 0x%02X % (value, bytesFromTarget[(value-(int(0x30)))]))
statusTuple sidebandBusController.getTargetStatus(DIMM0-SPD)
if statusTuple is not None:(pecErr, protocolErr, pendingInterrupt) statusTupleprint(pecErr: 0x%02X protocolErr: 0x%02X pendingInterrupt: 0x%02X % (pecErr, protocolErr, pendingInterrupt))
status sidebandBusController.doBroadcastWrite(RSTDAA)
if status True:svt.printMsg(RSTDAA CCC PASS, green)
else:svt.printMsg(RSTDAA CCC FAIL, red)
i3cDataCapture.stop()点击Run运行如图 打开生成的波形结果如图 10、I2C模式写Reg
SV4E-I3C设备在i2c模式下写SPD5的Reg(MR寄存器)Python代码如下
import dftm.svt as svt
i3cDataCapture.start()
sidebandBusController.setup()
regAddr 0x00
dataByte 0x00
sidebandBusController.enableLowBitRateMode()
status sidebandBusController.spdLegacyWriteReg(DIMM0-SPD, regAddr, dataByte, twoByteAddressingFalse)
if status True:svt.printMsg(spdLegacyWriteReg PASS, green)
else:svt.printMsg(spdLegacyWriteReg FAIL, red)
i3cDataCapture.stop()Procedure区域编辑代码点击Run运行如图 打开生成的波形结果如图 11、I2C模式写Mem
SV4E-I3C设备在i2c模式下写SPD5的Mem(NVM寄存器)Python代码如下
import dftm.svt as svt
i3cDataCapture.start()
sidebandBusController.setup()
sidebandBusController.enableLowBitRateMode()
memBlock 0x00
data16Bytes []
for datanum in range(16):data16Bytes.append(0xFF)
for block in range(16):for addr in range(4):status sidebandBusController.spdLegacyWriteMem(DIMM0-SPD, memBlock, 0x00, data16Bytes)if status True:print(memBlock: %d write 0x%02X PASS % (block,data16Bytes[0]))else:print(memBlock: %d write 0x%02X FAIL % (block,data16Bytes[0]))
memBlock memBlock 1
i3cDataCapture.stop()Procedure区域编辑代码点击Run运行如图LOG区域已经打印运行结果 打开生成的波形结果如图 12、I2C模式读Mem
SV4E-I3C设备在i2c模式下读SPD5的Mem(NVM寄存器)Python代码如下
import dftm.svt as svt
i3cDataCapture.start()
sidebandBusController.setup()
sidebandBusController.enableLowBitRateMode()
memBlock 0x00
for block in range(16):
bytesFromTarget sidebandBusController.spdLegacyReadMem(DIMM0-SPD, memBlock, 0x00, numBytes 64, twoByteAddressingFalse)for value in range(64):print(memBlock: %d memAddr: 0x%02X mrbyte: 0x%02X % (block, value, bytesFromTarget[value]))
memBlock memBlock 1
i3cDataCapture.stop()Procedure区域编辑代码点击Run运行如图LOG区域已经打印运行结果 打开生成的波形结果如图 13、I3C模式读Reg
SV4E-I3C设备在i3c模式下读SPD5的Reg(MR寄存器)Python代码如下
import dftm.svt as svt
i3cDataCapture.start()
sidebandBusController.setup()
regAddr 0x00
byte_num 64
sidebandBusController.enableLowBitRateMode()
status sidebandBusController.doBroadcastWrite(SETAASA)
if status True:svt.printMsg(SETAASA CCC PASS, green)
else:svt.printMsg(SETAASA CCC FAIL, red)
sidebandBusController.disableLowBitRateMode()
bytesFromTarget sidebandBusController.spdReadReg(DIMM0-SPD, regAddr, numBytes byte_num)
for value in range(int(regAddr),int(byte_numregAddr)):print(regAddr: 0x%02X mrbyte: 0x%02X % (value, bytesFromTarget[(value-(int(regAddr)))]))
status sidebandBusController.doBroadcastWrite(RSTDAA)
if status True:svt.printMsg(RSTDAA CCC PASS, green)
else:svt.printMsg(RSTDAA CCC FAIL, red)
i3cDataCapture.stop()Procedure区域编辑代码点击Run运行如图LOG区域已经打印运行结果 打开生成的波形结果如图 14、I3C模式写Reg
SV4E-I3C设备在i3c模式下写SPD5的Reg(MR寄存器)Python代码如下
import dftm.svt as svt
i3cDataCapture.start()
sidebandBusController.setup()
sidebandBusController.enableLowBitRateMode()
status sidebandBusController.doBroadcastWrite(SETAASA)
if status True:svt.printMsg(SETAASA CCC PASS, green)
else:svt.printMsg(SETAASA CCC FAIL, red)
sidebandBusController.disableLowBitRateMode()
regAddr 0x00
dataByte 0x00
status sidebandBusController.spdWriteReg(DIMM0-SPD, regAddr, dataByte)
if status True:svt.printMsg(spdWriteReg PASS, green)
else:svt.printMsg(spdWriteReg FAIL, red)
status sidebandBusController.doBroadcastWrite(RSTDAA)
if status True:svt.printMsg(RSTDAA CCC PASS, green)
else:svt.printMsg(RSTDAA CCC FAIL, red)
i3cDataCapture.stop()Procedure区域编辑代码点击Run运行如图LOG区域已经打印运行结果 打开生成的波形结果如图 15、I3C模式写Mem
SV4E-I3C设备在i3c模式下写SPD5的Mem(NVM寄存器)Python代码如下
import dftm.svt as svt
i3cDataCapture.start()
sidebandBusController.setup()
sidebandBusController.enableLowBitRateMode()
status sidebandBusController.doBroadcastWrite(SETAASA)
if status True:svt.printMsg(SETAASA CCC PASS, green)
else:svt.printMsg(SETAASA CCC FAIL, red)
sidebandBusController.disableLowBitRateMode()
memBlock 0x00
data16Bytes []
for datanum in range(16):data16Bytes.append(0xFF)
for block in range(16):for addr in range(4):status sidebandBusController.spdWriteMem(DIMM0-SPD, memBlock, 0x00, data16Bytes)if status True:print(memBlock: %d write 0x%02X PASS % (block,data16Bytes[0]))else:print(memBlock: %d write 0x%02X FAIL % (block,data16Bytes[0]))
memBlock memBlock 1
status sidebandBusController.doBroadcastWrite(RSTDAA)
if status True:svt.printMsg(RSTDAA CCC PASS, green)
else:svt.printMsg(RSTDAA CCC FAIL, red)
i3cDataCapture.stop()Procedure区域编辑代码点击Run运行如图LOG区域已经打印运行结果 打开生成的波形结果如图 16、I3C模式读Mem
SV4E-I3C设备在i3c模式下读SPD5的Mem(NVM寄存器)Python代码如下
import dftm.svt as svt
i3cDataCapture.start()
sidebandBusController.setup()
sidebandBusController.enableLowBitRateMode()
status sidebandBusController.doBroadcastWrite(SETAASA)
if status True:
svt.printMsg(SETAASA CCC PASS, green)
else:
svt.printMsg(SETAASA CCC FAIL, red)
sidebandBusController.disableLowBitRateMode()
memBlock 0x00
for block in range(16):
bytesFromTarget sidebandBusController.spdReadMem(DIMM0-SPD, memBlock, 0x00, numBytes 64)for value in range(64):
print(memBlock: %d memAddr: 0x%02X mrbyte: 0x%02X % (block, value, bytesFromTarget[value]))
memBlock memBlock 1
status sidebandBusController.doBroadcastWrite(RSTDAA)
if status True:
svt.printMsg(RSTDAA CCC PASS, green)
else:
svt.printMsg(RSTDAA CCC FAIL, red)
i3cDataCapture.stop()Procedure区域编辑代码点击Run运行如图LOG区域已经打印运行结果 打开生成的波形结果如图 上述程序可能存在少量错误和可优化的地方后续博文将进行修改和优化
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