bissen21/Marlin_Firmware
1
0
Fork 0
Code Issues Pull Requests Projects Releases 4 Wiki Activity

Add macros for delays by machine cycle

Browse Source
This commit is contained in:
Scott Lahteine
2017-04-11 02:33:46 -05:00
parent 4ea447959e
commit e02a5a6371
3 changed files with 41 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

40
Marlin/macros.h
View File

@ -39,6 +39,46 @@
// Clock speed factor
#define CYCLES_PER_MICROSECOND (F_CPU / 1000000UL) // 16 or 20
// Highly granular delays for step pulses, etc.
#define DELAY_0_NOP NOOP
#define DELAY_1_NOP __asm__("nop\n\t")
#define DELAY_2_NOP DELAY_1_NOP; DELAY_1_NOP
#define DELAY_3_NOP DELAY_1_NOP; DELAY_2_NOP
#define DELAY_4_NOP DELAY_1_NOP; DELAY_3_NOP
#define DELAY_5_NOP DELAY_1_NOP; DELAY_4_NOP
#define DELAY_NOPS(X) \
switch (X) { \
case 20: DELAY_1_NOP; case 19: DELAY_1_NOP; \
case 18: DELAY_1_NOP; case 17: DELAY_1_NOP; \
case 16: DELAY_1_NOP; case 15: DELAY_1_NOP; \
case 14: DELAY_1_NOP; case 13: DELAY_1_NOP; \
case 12: DELAY_1_NOP; case 11: DELAY_1_NOP; \
case 10: DELAY_1_NOP; case 9: DELAY_1_NOP; \
case 8: DELAY_1_NOP; case 7: DELAY_1_NOP; \
case 6: DELAY_1_NOP; case 5: DELAY_1_NOP; \
case 4: DELAY_1_NOP; case 3: DELAY_1_NOP; \
case 2: DELAY_1_NOP; case 1: DELAY_1_NOP; \
}
#define DELAY_10_NOP DELAY_5_NOP; DELAY_5_NOP
#define DELAY_20_NOP DELAY_10_NOP; DELAY_10_NOP
#if CYCLES_PER_MICROSECOND == 16
#define DELAY_1US DELAY_10_NOP; DELAY_5_NOP; DELAY_1_NOP
#else
#define DELAY_1US DELAY_20_NOP
#endif
#define DELAY_2US DELAY_1US; DELAY_1US
#define DELAY_3US DELAY_1US; DELAY_2US
#define DELAY_4US DELAY_1US; DELAY_3US
#define DELAY_5US DELAY_1US; DELAY_4US
#define DELAY_6US DELAY_1US; DELAY_5US
#define DELAY_7US DELAY_1US; DELAY_6US
#define DELAY_8US DELAY_1US; DELAY_7US
#define DELAY_9US DELAY_1US; DELAY_8US
#define DELAY_10US DELAY_1US; DELAY_9US
// Remove compiler warning on an unused variable
#define UNUSED(x) (void) (x)