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PCD
Elements: text is optional and may be any text
Purpose:
Forces the compiler to generate a warning at the location this directive appears in
the file. The text may include macros that will be expanded for the display. This may
be used to see the macro expansion. The command may also be used to alert the
user to an invalid compile time situation.
Examples: #if BUFFER_SIZE < 32
#warning Buffer Overflow may occur
#endif
Example
Files:
Also See: #ERROR
#WORD
Syntax:
#WORD id = x
Elements: id is a valid C identifier,
x is a C variable or a constant
Purpose:
If the id is already known as a C variable then this will locate the variable at address
x. In this case the variable type does not change from the original definition. If the id
is not known a new C variable is created and placed at address x with the type
int16
Warning: In both cases memory at x is not exclusive to this variable. Other
variables may be located at the same location. In fact when x is a variable, then id
and x share the same memory location.
Examples: #word data = 0x0800
struct
{
int lowerByte : 8;
int upperByte : 8;
} control_word;
#word control_word = 0x85
...
control_word.upperByte = 0x42;
Example
Files:
Also See:
138
None
#BIT, #BYTE, #LOCATE, #RESERVE
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相关代理商/技术参数
PCD_09
制造商:MACOM 制造商全称:Tyco Electronics 功能描述:Low Profile PCB Relay PCD
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制造商:Molex 功能描述:ETHERNET CABLE ASSEMBLY
PCD-00173-0E
制造商:Molex 功能描述:Ethernet Cable Assembly
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制造商:Molex 功能描述:ETHERNET CABLE ASSEMBLY 制造商:Molex 功能描述:ETHERNET CABLE ASSEMBLY; Cable Length - Imperial:3ft; Cable Length - Metric:914.4mm; Connector Type A:RJ45 Plug; Connector Type B:RJ45 Plug; Jacket Color:Red; Approval Bodies:CSA / UL; Body Material:PVC; Cable Assembly Type:Ethernet ;RoHS Compliant: NA
PCD-00174-0E
制造商:Molex 功能描述:ETHERNET CABLE ASSEMBLY 制造商:Molex 功能描述:ETHERNET CABLE ASSEMBLY; Cable Length - Imperial:3ft; Cable Length - Metric:914.4mm; Connector Type A:RJ45 Plug; Connector Type B:RJ45 Plug; Jacket Color:Grey; Approval Bodies:CSA / UL; Body Material:PVC; Cable Assembly Type:Ethernet;RoHS Compliant: NA
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制造商:Molex 功能描述:ETHERNET CABLE ASSEMBLY