[求助] 求助PIC24F DSWDT寄存器设置方法

貌然神伤 2015-12-22 14:26 楼主

这个是头文件里对寄存器设置的描述
extern __attribute__((space(prog))) int _FDS;
#define _FDS(x) __attribute__((section("__FDS.sec"),space(prog))) int _FDS = (x);

/*
** Only one invocation of FDS should appear in a project,
** at the top of a C source file (outside of any function).
**
** The following constants can be used to set FDS.
** Multiple options may be combined, as shown:
**
** _FDS( OPT1_ON & OPT2_OFF & OPT3_PLL )
**
** Deep Sleep Watchdog Timer:
**    DSWDTEN_OFF       Disabled
**    DSWDTEN_ON          Enabled
**
** Deep Sleep BOR:
**    DSBOREN_OFF       Disabled
**    DSBOREN_ON          Enabled
**
** RTCC Reference Oscillator Select:
**    RTCOSC_LPRC       Low Power RC Oscillator (LPRC)
**    RTCOSC_SOSC       Secondary Oscillator (SOSC)
**
** Deep Sleep Watchdog Oscillator Clock Select:
**    DSWDTOSC_LPRC       Secondary Oscillator (SOSC)
**    DSWDTOSC_SOSC       Low Power RC Oscillator (LPRC)
**
** Deep Sleep Watchdog Postscale Select Bits:
**    DSWDTPS_DSWDTPS0    1:2 (2.1 ms)
**    DSWDTPS_DSWDTPS1    1:8 (8.3 ms)
**    DSWDTPS_DSWDTPS2    1:32 (33 ms)
**    DSWDTPS_DSWDTPS3    1:128 (132 ms)
**    DSWDTPS_DSWDTPS4    1:512 (528 ms)
**    DSWDTPS_DSWDTPS5    1:2048 (2.1 Seconds)
**    DSWDTPS_DSWDTPS6    1:8192 (8.5 Seconds)
**    DSWDTPS_DSWDTPS7    1:32,768 (34 Seconds)
**    DSWDTPS_DSWDTPS8    1:131,072 (135 Seconds)
**    DSWDTPS_DSWDTPS9    1:524,288 (9 Minutes)
**    DSWDTPS_DSWDTPSA    1:2,097,152 (36 Minutes)
**    DSWDTPS_DSWDTPSB    1:8,388,608 (2.4 Hours)
**    DSWDTPS_DSWDTPSC    1:33,554,432 (9.6 Hours)
**    DSWDTPS_DSWDTPSD    1:134,217,728 (38.5 Hours)
**    DSWDTPS_DSWDTPSE    1:536,870,912 (6.4 Days)
**    DSWDTPS_DSWDTPSF    1:2,147,483,648 (25.7 Days)
**
*/

#define DSWDTEN_OFF       0xFF7F
#define DSWDTEN_ON          0xFFFF

#define DSBOREN_OFF       0xFFBF
#define DSBOREN_ON          0xFFFF

#define RTCOSC_LPRC       0xFFDF
#define RTCOSC_SOSC       0xFFFF

#define DSWDTOSC_LPRC       0xFFEF
#define DSWDTOSC_SOSC       0xFFFF

#define DSWDTPS_DSWDTPS0    0xFFF0
#define DSWDTPS_DSWDTPS1    0xFFF1
#define DSWDTPS_DSWDTPS2    0xFFF2
#define DSWDTPS_DSWDTPS3    0xFFF3
#define DSWDTPS_DSWDTPS4    0xFFF4
#define DSWDTPS_DSWDTPS5    0xFFF5
#define DSWDTPS_DSWDTPS6    0xFFF6
#define DSWDTPS_DSWDTPS7    0xFFF7
#define DSWDTPS_DSWDTPS8    0xFFF8
#define DSWDTPS_DSWDTPS9    0xFFF9
#define DSWDTPS_DSWDTPSA    0xFFFA
#define DSWDTPS_DSWDTPSB    0xFFFB
#define DSWDTPS_DSWDTPSC    0xFFFC
#define DSWDTPS_DSWDTPSD    0xFFFD
#define DSWDTPS_DSWDTPSE    0xFFFE
#define DSWDTPS_DSWDTPSF    0xFFFF

回复评论（4）

沙发貌然神伤

按照描述
_FDS(DSWDTEN_ON&DSBOREN_OFF&RTCOSC_LPRC&DSWDTOSC_LPRC&DSWDTPS_DSWDTPS5);
编译过不了
报错如下
main.c:57: error: section attribute cannot be specified for local variables

点赞 2015-12-22 14:27