hal_type_t.3hal

CNC 的开放码,EMC2 V2.2.8版

.TH hal_type_t "3hal" "2006-10-12" "EMC Documentation" "HAL"
.SH NAME
hal_type_t \- typedefs for HAL datatypes
.SH DESRCIPTION
.TP
typedef ... \fBhal_bit_t;
A type which may have a value of 0 or nonzero.
.TP
typedef ... \fBhal_s32_t\fR;
A type which may have a value from -2147483648 to 2147483647.
.TP
typedef ... \fBhal_u32_t\fR;
A type which may have a value from 0 to 4294967295.
.TP
typedef ... \fBhal_float_t\fR;
A floating-point type, which typically has the same precision and range
as the C type \fBfloat\fR.
.TP
typedef enum \fBhal_type_t\fR;
.RS
.TP
\fBHAL_BIT\fR
Corresponds to the type \fBhal_bit_t\fR.
.TP
\fBHAL_FLOAT\fR
Corresponds to the type \fBhal_float_t\fR.
.TP
\fBHAL_S32\fR
Corresponds to the type \fBhal_s32_t\fR.
.TP
\fBHAL_U32\fR
Corresponds to the type \fBhal_u32_t\fR.
.RE
.SH NOTES
\fBhal_bit_t\fR is typically a typedef to an integer type whose range is larger
than just 0 and 1.  When testing the value of a \fBhal_bit_t\fR, never compare
it to 1.  Prefer one of the following:
.RS
.IP \(bu 4
if(b)
.IP \(bu 4
if(b != 0)
.RE
.SH SEE ALSO
\fBhal_pin_new(3hal)\fR, \fBhal_param_new(3hal)\fR