修复 if((ReqSID == SID_DIAGNOSTIC_SESSION_CONTROL) && ((ReqSub == 0x02u) || (ReqSub == 0x82u))) ^ Msg(2:1251) Suffixed integer constant causes implicit conversion of other operand. Msg(2:2100) Integral promotion : unsigned char promoted to signed int. REFERENCE - ISO:C90-6.2.1.1 Characters and Integers ^ Msg(2:1251) Suffixed integer constant causes implicit conversion of other operand. Msg(2:2100) Integral promotion : unsigned char promoted to signed int. REFERENCE - ISO:C90-6.2.1.1 Characters and Integers ^ Msg(2:3120) Hard-coded 'magic' integer constant, '0x02u'. ^ Msg(2:1251) Suffixed integer constant causes implicit conversion of other operand. Msg(2:2100) Integral promotion : unsigned char promoted to signed int. REFERENCE - ISO:C90-6.2.1.1 Characters and Integers
时间: 2024-04-08 17:29:27 浏览: 28
这些错误是由于在条件语句中使用了带有后缀的整数常量引起的。这会导致其他操作数的隐式转换,并且会产生一些警告信息。
要解决这些问题,你可以考虑进行以下修改:
1. 移除整数常量后缀,将其改为普通的整数常量。例如,将 "0x02u" 改为 "0x02"。
2. 将条件语句中的变量类型统一为无符号字符型(unsigned char),以避免隐式转换。例如,将变量 ReqSID 和 ReqSub 的类型都设置为 unsigned char。
修复后的代码片段示例:
```c
if((ReqSID == SID_DIAGNOSTIC_SESSION_CONTROL) && ((ReqSub == 0x02) || (ReqSub == 0x82)))
```
请注意,根据你的实际需求和代码上下文,可能还需要做其他的修改。上述建议仅仅是针对给出的错误信息进行的一般性建议。
相关问题
import socket import struct # DOIP服务器地址和端口号 DOIP_SERVER_IP = "192.168.0.1" DOIP_SERVER_PORT = 13400 # DOIP消息类型 DOIP_TYPE_ROUTING_ACTIVATION_REQUEST = 0x0000 DOIP_TYPE_ROUTING_ACTIVATION_RESPONSE = 0x0001 DOIP_TYPE_DIAGNOSTIC_MESSAGE = 0x8001 # 构造DOIP连接请求消息 def build_doip_activation_request(): msg = bytearray.fromhex("000000150200000000000000000000000000000000000000") return msg # 解析DOIP连接响应消息 def parse_doip_activation_response(msg): activation_status = struct.unpack(">H", msg[4:6])[0] return activation_status # 构造DOIP诊断消息 def build_doip_diagnostic_message(sid, data): msg = bytearray() msg.extend(struct.pack(">H", DOIP_TYPE_DIAGNOSTIC_MESSAGE)) msg.extend(struct.pack(">H", len(data) + 4)) msg.extend(struct.pack(">H", sid)) msg.extend(data) return msg # 连接DOIP服务器并发送消息 def send_doip_message(msg): with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock: sock.connect((DOIP_SERVER_IP, DOIP_SERVER_PORT)) sock.sendall(msg) # 接收DOIP服务器响应消息 response = sock.recv(1024) print("Received:", response.hex()) # 关闭连接 sock.close() return response # 激活诊断 def activate_diagnostic(): msg = build_doip_activation_request() response = send_doip_message(msg) activation_status = parse_doip_activation_response(response) if activation_status == 0: print("Diagnostic activated") else: print("Diagnostic activation failed") # 发送诊断服务 def send_diagnostic_service(sid, data): msg = build_doip_diagnostic_message(sid, data) response = send_doip_message(msg) # 处理诊断服务响应 # ... # 示例:发送读取故障码服务 def read_dtc(): sid = 0x03 data = bytearray.fromhex("01") send_diagnostic_service(sid, data) # 激活诊断 activate_diagnostic() # 发送诊断服务 上面的代码 处理诊断回复的时候,如果回复超过1024字节 该怎么办,请优化代码
可以使用一个循环,每次接收1024字节,直到接收完所有的响应消息。具体的实现方式可以参考下面的代码:
```
def send_doip_message(msg):
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
sock.connect((DOIP_SERVER_IP, DOIP_SERVER_PORT))
sock.sendall(msg)
response = bytearray()
while True:
data = sock.recv(1024)
if not data:
break
response.extend(data)
print("Received:", response.hex())
return response
```
在这个实现中,我们使用了一个 `bytearray` 类型的变量 `response` 来保存接收到的响应消息。在每次接收到响应消息的时候,我们将其添加到 `response` 变量中。如果接收到的消息长度不足1024字节,说明已经接收完了所有的响应消息,可以退出循环并返回 `response` 变量。
loopBlockId = NvM_gstaBlockVar[loopBlockId].NxtBlockId; if( TRUE == flag ) { rtrnValu = E_OK; break; } } if( (NVM_BLOCK_HIGHEST_PRI == NvM_gstaBlockVar[BlockId].Priority) && (NVM_WRITE_BLOCK == NvM_Ctrl) ) { Nvm_QueueHeader.CounterImmediate++; } Nvm_QueueHeader.Counter++; } return rtrnValu; }逐句解释代码
这段代码是一个函数,其功能是写入NVM(Non-Volatile Memory,非易失性存储器)块。下面逐句解释代码的作用:
```
Std_ReturnType NvM_WriteBlock( NvM_BlockIdType BlockId, uint8 *NvM_DstPtr )
```
定义了一个名为 `NvM_WriteBlock` 的函数,它有两个参数:`BlockId` 表示要写入的NVM块的ID,`NvM_DstPtr` 表示要写入的数据的指针。
```
{
Std_ReturnType rtrnValu = E_NOT_OK;
NvM_RequestResultType flag = NVM_REQ_PENDING;
```
定义了两个变量:`rtrnValu` 表示函数的返回值,默认为 `E_NOT_OK`;`flag` 表示NVM请求的结果,默认值为 `NVM_REQ_PENDING`。
```
if( (BlockId >= NVM_TOTAL_NUMBER_OF_NVRAM_BLOCKS) || (NULL_PTR == NvM_DstPtr) )
{
flag = NVM_REQ_NOT_OK;
}
```
如果传入的 `BlockId` 大于等于总的NVM块数,或者 `NvM_DstPtr` 是空指针,则将 `flag` 设置为 `NVM_REQ_NOT_OK`。
```
else
{
uint16 loopBlockId = NvM_BlockDescriptorTable[BlockId].nvBlockNum;
if( NVM_REQ_PENDING == NvM_AdminBlockTable[BlockId].NvMResult )
{
flag = NVM_REQ_PENDING;
}
```
否则,将 `loopBlockId` 初始化为 `BlockId` 对应的NVM块的编号,然后判断该块的NVM请求是否还在进行中,如果是,则将 `flag` 设置为 `NVM_REQ_PENDING`。
```
else
{
flag = NVM_REQ_OK;
}
while( NvM_BlockDescriptorTable[loopBlockId].nvBlockNum == loopBlockId )
{
if( (NvM_BlockDescriptorTable[loopBlockId].blockDesc & NVM_DCM_BLOCK) == NVM_DCM_BLOCK )
{
flag = NVM_REQ_OK;
break;
}
```
如果NVM请求已经完成,将 `flag` 设置为 `NVM_REQ_OK`。然后进入一个while循环,这里的作用是遍历所有的NVM块,找到与 `loopBlockId` 对应的NVM块。在循环中,首先判断当前遍历到的块是否是DCM(Diagnostic Communication Manager)块。如果是,将 `flag` 设置为 `NVM_REQ_OK`,并且跳出循环。
```
if( NvM_gstaBlockVar[loopBlockId].NvMResult != NVM_REQ_PENDING )
{
if( (NvM_BlockDescriptorTable[loopBlockId].blockDesc & NVM_SELECT_BLOCK_FOR_READ_ALL) == NVM_SELECT_BLOCK_FOR_READ_ALL )
{
NvM_ReadAllFlag = TRUE;
}
NvM_gstaBlockVar[loopBlockId].NvMResult = NVM_REQ_PENDING;
NvM_gstaBlockVar[loopBlockId].NvMCurrentJob = NVM_WRITE_BLOCK;
NvM_gstaBlockVar[loopBlockId].NvMDstPtr = NvM_DstPtr;
NvM_gstaBlockVar[loopBlockId].NvMJobPriority = NvM_BlockDescriptorTable[loopBlockId].blockJobPriority;
NvM_gstaBlockVar[loopBlockId].NvMNumOfBytes = NvM_BlockDescriptorTable[loopBlockId].blockLength;
NvM_gstaBlockVar[loopBlockId].NxtBlockId = NvM_BlockDescriptorTable[loopBlockId].nvBlockNum;
flag = NVM_REQ_OK;
}
loopBlockId = NvM_gstaBlockVar[loopBlockId].NxtBlockId;
if( TRUE == flag )
{
rtrnValu = E_OK;
break;
}
}
```
如果当前遍历到的NVM块的请求已经完成,那么将该块的请求状态设置为 `NVM_REQ_PENDING`,并且设置其它属性,如目标指针、操作类型、优先级、字节数等。然后将 `flag` 设置为 `NVM_REQ_OK`。然后通过 `NvM_gstaBlockVar[loopBlockId].NxtBlockId` 找到下一个需要遍历的块。最后判断 `flag` 是否为真,如果是,则将 `rtrnValu` 设置为 `E_OK`,并且跳出循环。
```
if( (NVM_BLOCK_HIGHEST_PRI == NvM_gstaBlockVar[BlockId].Priority) && (NVM_WRITE_BLOCK == NvM_Ctrl) )
{
Nvm_QueueHeader.CounterImmediate++;
}
Nvm_QueueHeader.Counter++;
}
return rtrnValu;
}
```
如果当前遍历的NVM块是最高优先级的块,并且操作类型是写入,则将 `Nvm_QueueHeader.CounterImmediate` 加1。无论如何,将 `Nvm_QueueHeader.Counter` 加1。最后返回 `rtrnValu`。