stm: add __WFI to sys_tick delay.

dpgeorge · dpgeorge · commit 261dbf8ce55e · 2013-12-06T00:42:13.000Z
diff --git a/stm/systick.c b/stm/systick.c
@@ -33,10 +33,12 @@ void sys_tick_wait_at_least(uint32_t stc, uint32_t delay_ms) {
     if (stc_wait < stc) {
         // stc_wait wrapped around
         while (stc <= sys_tick_counter || sys_tick_counter < stc_wait) {
+            __WFI(); // enter sleep mode, waiting for interrupt
         }
     } else {
         // stc_wait did not wrap around
         while (stc <= sys_tick_counter && sys_tick_counter < stc_wait) {
+            __WFI(); // enter sleep mode, waiting for interrupt
         }
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -33,10 +33,12 @@ void sys_tick_wait_at_least(uint32_t stc, uint32_t delay_ms) {`
`33`	`33`	`if (stc_wait < stc) {`
`34`	`34`	`// stc_wait wrapped around`
`35`	`35`	`while (stc <= sys_tick_counter \|\| sys_tick_counter < stc_wait) {`
	`36`	`+ __WFI(); // enter sleep mode, waiting for interrupt`
`36`	`37`	`}`
`37`	`38`	`} else {`
`38`	`39`	`// stc_wait did not w 5178 rap around`
`39`	`40`	`while (stc <= sys_tick_counter && sys_tick_counter < stc_wait) {`
	`41`	`+ __WFI(); // enter sleep mode, waiting for interrupt`
`40`	`42`	`}`
`41`	`43`	`}`
`42`	`44`	`}`