Added real-time clock functions to the cx16 library.

2019-12-27 18:07:37 -05:00
parent f067c4530f
commit b56ba8f073
6 changed files with 229 additions and 48 deletions
--- a/libsrc/cx16/getres.s
+++ b/libsrc/cx16/getres.s
@@ -0,0 +1,36 @@
+;
+; 2019-12-26, Greg King
+;
+; int __fastcall__ clock_getres (clockid_t clk_id, struct timespec *res);
+;
+
+        .include        "time.inc"
+
+        .importzp       ptr1
+        .import         incsp1, return0
+
+
+;----------------------------------------------------------------------------
+
+.proc   _clock_getres
+
+        sta     ptr1
+        stx     ptr1+1
+
+        ldy     #.sizeof(timespec) - 1
+@L1:    lda     time,y
+        sta     (ptr1),y
+        dey
+        bpl     @L1
+
+        jsr     incsp1
+        jmp     return0
+
+.endproc
+
+;----------------------------------------------------------------------------
+; timespec struct with tv_nsec set to approximately 1/60 of a second
+.rodata
+
+time:   .dword  0
+        .dword  17 * 1000 * 1000