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| author | Kevin O'Connor <kevin@koconnor.net> | 2018-10-04 11:31:36 -0400 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2018-10-11 10:50:51 -0400 |
| commit | 7cbc44b8d3bb13bb32b8d9069e262483578cf82f (patch) | |
| tree | aa8e551bf16795bc20291c7487456c63e4f546f7 | |
| parent | 102ec4938d1d79e840889e3c0a726c11e9245d4b (diff) | |
| download | kutter-7cbc44b8d3bb13bb32b8d9069e262483578cf82f.tar.gz kutter-7cbc44b8d3bb13bb32b8d9069e262483578cf82f.tar.xz kutter-7cbc44b8d3bb13bb32b8d9069e262483578cf82f.zip | |
stm32f1: Use -O2 optimization and inline timer_read_time()
As long as timer_read_time() is inlined, I get better performance with
gcc -O2 optimization. The binary is also dramatically smaller and O2
better matches the other platforms.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
| -rw-r--r-- | src/stm32f1/Makefile | 1 | ||||
| -rw-r--r-- | src/stm32f1/timer.c | 2 |
2 files changed, 1 insertions, 2 deletions
diff --git a/src/stm32f1/Makefile b/src/stm32f1/Makefile index 66a677db..44643e5e 100644 --- a/src/stm32f1/Makefile +++ b/src/stm32f1/Makefile @@ -11,7 +11,6 @@ CFLAGS += -mthumb -mcpu=cortex-m3 CFLAGS += -Ilib/cmsis-core CFLAGS += -Ilib/cmsis-stm32f1/include -Ilib/hal-stm32f1/include CFLAGS += -DSTM32F103xB -CFLAGS += -O3 CFLAGS_klipper.elf += -T $(OUT)stm32f1.ld CFLAGS_klipper.elf += --specs=nano.specs --specs=nosys.specs diff --git a/src/stm32f1/timer.c b/src/stm32f1/timer.c index e9b96b0a..99eb751f 100644 --- a/src/stm32f1/timer.c +++ b/src/stm32f1/timer.c @@ -50,7 +50,7 @@ timer_kick(void) static uint32_t timer_high; // Return the current time (in absolute clock ticks). -uint32_t +inline uint32_t timer_read_time(void) { uint32_t th = readl(&timer_high); |