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pru: Move communication code to second PRU

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Perform input and output in the second PRU so that more space is
available in the primary PRU.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2017-05-16 13:41:44 -04:00
parent b6f24e78ac
commit b85755c0ff
5 changed files with 201 additions and 138 deletions
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18
src/pru/Makefile
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@@ -6,22 +6,24 @@ CROSS_PREFIX=pru-
dirs-y += src/pru src/generic
dirs-y += lib/pru_rpmsg
CFLAGS += -Os -mmcu=am335x.pru0
CFLAGS += -Os -mmcu=am335x.pru1
CFLAGS += -Ilib/pru_rpmsg/include -Ilib/pru_rpmsg/include/am335x
CFLAGS_klipper.o := $(filter-out -mmcu=%, $(CFLAGS_klipper.o))
CFLAGS_klipper.elf := $(CFLAGS) -minrt -T src/pru/pru.lds
CFLAGS_pru1.elf := $(filter-out -mmcu=%, $(CFLAGS)) -mmcu=am335x.pru1
CFLAGS_pru0.elf := $(filter-out -mmcu=%, $(CFLAGS)) -minrt -mmcu=am335x.pru0
# Add source files
src-y := $(filter-out debugcmds.c, $(src-y))
src-y += pru/main.c pru/console.c pru/gpio.c
src-y += pru/main.c pru/gpio.c
src-y += generic/crc16_ccitt.c generic/timer_irq.c
src-y += ../lib/pru_rpmsg/pru_rpmsg.c ../lib/pru_rpmsg/pru_virtqueue.c
# Build the additional PRU1 binary
target-y += $(OUT)pru1.elf
pru0-y := pru/pru0.c
pru0-y += ../lib/pru_rpmsg/pru_rpmsg.c ../lib/pru_rpmsg/pru_virtqueue.c
$(OUT)pru1.elf: $(OUT)src/pru/pru1.o
# Build the additional PRU0 binary
target-y += $(OUT)pru0.elf
$(OUT)pru0.elf: $(patsubst %.c, $(OUT)src/%.o,$(pru0-y))
@echo " Linking $@"
$(Q)$(CC) $(CFLAGS_pru1.elf) $^ -o $@
$(Q)$(CC) $(CFLAGS_pru0.elf) $^ -o $@