Fix timer_elapsed() overflow issue for STM32F103 and other ChibiOS boards (#7595)

* fixed strange space cadet timer owerflow on STM32F103

* Moved elapsed time fix to timer.c

1 files changed, 6 insertions, 2 deletions

diff --git a/tmk_core/common/chibios/timer.c b/tmk_core/common/chibios/timer.c
index 1ce9d1d17..66c4a6458 100644
--- a/tmk_core/common/chibios/timer.c
+++ b/tmk_core/common/chibios/timer.c
@@ -28,6 +28,10 @@ uint32_t timer_read32(void) {
     return current_time_ms;
 }
 
-uint16_t timer_elapsed(uint16_t last) { return timer_read() - last; }
+uint16_t timer_elapsed(uint16_t last) {
+    return TIMER_DIFF_16(timer_read(), last);
+}
 
-uint32_t timer_elapsed32(uint32_t last) { return timer_read32() - last; }
+uint32_t timer_elapsed32(uint32_t last) {
+    return TIMER_DIFF_32(timer_read32(), last);
+}