Organize files better and include binaries for assembly samples

6 files changed, 258 insertions, 0 deletions

diff --git a/assembly/rrxing/Makefile b/assembly/rrxing/Makefile
new file mode 100644
index 0000000..1f19256
--- /dev/null
+++ b/assembly/rrxing/Makefile
@@ -0,0 +1,24 @@
+MARCH ?= rv32imacbzicntr_zicond_zicsr_zifencei_zihintpause_zilsd_zclsd_zabha_zacas_zbkb_zbkx_zcb_zcmp_zcmt
+
+.PHONY: all dump load clean
+
+all: rrxing.hex
+
+rrxing.o: rrxing.S
+	riscv32-none-elf-as -I../rvcontroller-libraries -march=${MARCH} -o rrxing.o rrxing.S
+
+rrxing.elf:  rrxing.o
+	riscv32-none-elf-ld -T rvcontroller.ld --no-warn-rwx-segments -o rrxing.elf rrxing.o
+
+dump: rrxing.elf
+	riscv32-none-elf-objdump -d rrxing.elf
+
+rrxing.hex: rrxing.elf
+	riscv32-none-elf-objcopy -O ihex rrxing.elf rrxing.hex
+
+load: rrxing.hex
+	bash -c "wl-copy < rrxing.hex"
+
+clean:
+	rm -f rrxing.bin rrxing.elf rrxing.o
+
diff --git a/assembly/rrxing/rrxing.S b/assembly/rrxing/rrxing.S
new file mode 100644
index 0000000..61fb41c
--- /dev/null
+++ b/assembly/rrxing/rrxing.S
@@ -0,0 +1,198 @@
+li a7,134 # Clear digilines buffer
+ecall
+
+restart:
+# Hardware initialization
+
+# Make sure light is off
+li a7,129 # Send digilines message
+la a0,lightchannel
+la a1,lightoffmsg
+ecall
+
+# Make sure bell is off
+li a7,129 # Send digilines message
+la a0,bellchannel
+la a1,belloffmsg
+ecall
+
+# Make sure gate is up
+li a7,129 # Send digilines message
+la a0,gatechannel
+la a1,gateupmsg
+ecall
+
+receiveloop:
+li a7,133 # Get digilines buffer level
+ecall
+beq a0,x0,receiveloop # If no messages yet, restart the loop
+
+li a7,135 # Read digilines message
+la a0,channelbuf
+li a1,16 # Channel buffer size
+la a2,msgbuf
+li a3,16 # Message buffer size
+ecall
+
+# Check if it's the right channel
+la a0,channelbuf
+la a1,detectchannel
+call strcmp
+beq a0,x0,receiveloop # Not the right channel, ignore it
+
+# Turn the light yellow
+li a7,129 # Send digilines message
+la a0,lightchannel
+la a1,lightyellowmsg
+ecall
+
+# Wait 1 second
+li a0,1
+call sleep
+
+# Turn the bell on
+li a7,129 # Send digilines message
+la a0,bellchannel
+la a1,bellonmsg
+ecall
+
+# Wait 2 seconds
+li a0,2
+call sleep
+
+# Turn the light red
+li a7,129 # Send digilines message
+la a0,lightchannel
+la a1,lightredmsg
+ecall
+
+# Wait 3 seconds
+li a0,3
+call sleep
+
+# Lower the gate
+li a7,129 # Send digilines message
+la a0,gatechannel
+la a1,gatedownmsg
+ecall
+
+# Wait 5 seconds
+li a0,5
+call sleep
+
+# Turn the bell off
+li a7,129 # Send digilines message
+la a0,bellchannel
+la a1,belloffmsg
+ecall
+
+waitlonger:
+
+# Wait 10 seconds
+li a0,10
+call sleep
+
+# Check if any more trains have been detected
+receiveloop2:
+li a7,133 # Get digilines buffer level
+ecall
+beq a0,x0,raise # If no messages yet, go ahead with timing out
+
+# If there is a message, check if it's a train
+
+li a7,135 # Read digilines message
+la a0,channelbuf
+li a1,16 # Channel buffer size
+la a2,msgbuf
+li a3,16 # Message buffer size
+ecall
+
+# Check if it's the right channel
+la a0,channelbuf
+la a1,detectchannel
+call strcmp
+beq a0,x0,receiveloop2 # Not the right channel, ignore this message and go on to the next
+
+# If it is the right channel, then get rid of the rest of the messages (if any)
+li a7,134 # Clear digilines buffer
+ecall
+
+j waitlonger # And go wait another 10 seconds
+
+raise:
+
+# Raise the gate
+li a7,129 # Send digilines message
+la a0,gatechannel
+la a1,gateupmsg
+ecall
+
+# Wait 2 seconds
+li a0,2
+call sleep
+
+# Turn the light off
+li a7,129 # Send digilines message
+la a0,lightchannel
+la a1,lightoffmsg
+ecall
+
+# And go wait for the next train
+j restart
+
+sleep:
+	# Expects a number of seconds in a0
+	# Uses t0
+	rdtime t0
+	add a0,t0,a0
+	sleep_loop:
+	rdtime t0
+	bltu t0,a0,sleep_loop
+ret
+
+strcmp:
+	# Expects string pointers in a0 and a1
+	# Compares until a NUL is reached on the first string
+	# Uses t0, t1, and t2
+	# Returns a0=1 if strings match, a0=0 otherwise
+	li t0,0 # t0 is the loop counter
+	strcmp_loop:
+	# Calculate addresses
+	add t1,a0,t0 # t1 is the pointer for the first string
+	add t2,a1,t0 # t2 is the pointer for the second string
+
+	# Read the bytes from each string
+	lb t1,0(t1)
+	lb t2,0(t2)
+
+	# Increment the loop counter
+	addi t0,t0,1
+
+	# And compare
+	bne t1,t2,strcmp_mismatch
+
+	# Check if a terminator was reached yet, keep going otherwise
+	li t2,0
+	bne t1,t2,strcmp_loop
+
+	# If we got here they match
+	li a0,1
+	ret
+
+	strcmp_mismatch:
+	li a0,0
+	ret
+
+channelbuf: .ascii "                "
+msgbuf: .ascii "                "
+lightchannel: .asciz "light"
+bellchannel: .asciz "bell"
+gatechannel: .asciz "gate"
+lightoffmsg: .asciz "OFF"
+lightyellowmsg: .asciz "YELLOW"
+lightredmsg: .asciz "RED"
+bellonmsg: .asciz "on"
+belloffmsg: .asciz "off"
+gateupmsg: .asciz "up"
+gatedownmsg: .asciz "down"
+detectchannel: .asciz "detect"
diff --git a/assembly/rrxing/rrxing.elf b/assembly/rrxing/rrxing.elf
new file mode 100755
index 0000000..cab0bf9
--- /dev/null
+++ b/assembly/rrxing/rrxing.elf
diff --git a/assembly/rrxing/rrxing.hex b/assembly/rrxing/rrxing.hex
new file mode 100644
index 0000000..7283fa9
--- /dev/null
+++ b/assembly/rrxing/rrxing.hex
@@ -0,0 +1,35 @@
+:1000000093086008730000009308100817050000AB

+:100010001305A51D970500009385251E730000009C

+:1000200093081008170500001305851C97050000AC

+:100030009385C51D73000000930810081705000084

+:100040001305551B970500009385851C7300000060

+:10005000930850087300000065DD930870081705C9

+:10006000000013058516C145170600001306E616A5

+:10007000C14673000000170500001305051597051C

+:10008000000093856519292A61D593081008170582

+:10009000000013058515970500009385451673002C

+:1000A00000000545F520930810081705000013050A

+:1000B0002514970500009385351573000000094548

+:1000C000C1289308100817050000130505129705AD

+:1000D000000093853513730000000D4555289308E3

+:1000E0001008170500001305F5109705000093850B

+:1000F0005512730000001545612893081008170574

+:1001000000001305E50E9705000093852510730088

+:1001100000002945B528930850087300000015CD4C

+:1001200093087008170500001305250AC145170636

+:1001300000001306860AC146730000001705000080

+:100140001305A508970500009385050D912861D535

+:1001500093086008730000006DBF9308100817052E

+:10016000000013053509970500009385650A7300A3

+:1001700000000945312893081008170500001305F1

+:10018000C506970500009385450773000000ADBDC7

+:10019000F32210C01695F32210C0E3EEA2FE828077

+:1001A000814233035500B383550003030300838367

+:1001B00003008502631773008143E31473FE054552

+:1001C00082800145828020202020202020202020A5

+:1001D000202020202020202020202020202020201F

+:1001E0002020202020206C696768740062656C6C98

+:1001F0000067617465004F46460059454C4C4F57A7

+:1002000000524544006F6E006F66660075700064B2

+:0C0210006F776E00646574656374000015

+:00000001FF

diff --git a/assembly/rrxing/rrxing.o b/assembly/rrxing/rrxing.o
new file mode 100644
index 0000000..09193ef
--- /dev/null
+++ b/assembly/rrxing/rrxing.o
diff --git a/assembly/rrxing/rvcontroller.ld b/assembly/rrxing/rvcontroller.ld
new file mode 120000
index 0000000..bc01402
--- /dev/null
+++ b/assembly/rrxing/rvcontroller.ld
@@ -0,0 +1 @@
+../../rvcontroller.ld
\ No newline at end of file