add communications test

Makefile

@@ -1,13 +1,14 @@
 test: test_asm c_test/encode_decode c_test/creole
+CFLAGS=-DCREOLE_TEST
 asm/libcreole.so: creole.c creole.h
-	$(CC) -Wall -fPIC -c creole.c -o c_test/creole.o
+	$(CC) $(CFLAGS) -Wall -fPIC -c creole.c -o c_test/creole.o
 	$(CC) -shared -o asm/libcreole.so c_test/creole.o
 
 test_asm: asm/libcreole.so
 	cd asm && python3 test.py -f
 c_test/encode_decode: c_test/encode_decode.c creole.c creole.h
-	$(CC) creole.c c_test/encode_decode.c -Wall -pedantic -std=c89 -g -fopenmp -o c_test/encode_decode
+	$(CC) $(CFLAGS) creole.c c_test/encode_decode.c -Wall -pedantic -std=c99 -g -fopenmp -o c_test/encode_decode
 	# c_test/encode_decode
 c_test/creole: c_test/creole.c creole.c creole.h c_test/greatest.h
-	$(CC) -g c_test/creole.c -Wall -pedantic -std=c89 -o c_test/creole
+	$(CC) $(CFLAGS) -g c_test/creole.c -Wall -pedantic -std=c99 -o c_test/creole
 	c_test/creole

asm/comm.py

@@ -0,0 +1,18 @@
+from creole import *
+import socket
+
+def connect(ip, port):
+	s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+	s.connect((ip, port))
+	return s
+
+def execute(creole_instance, socket):
+	code = creole_instance()
+	l = len(code)
+	assert l <= 0xFFFF
+	socket.sendall(bytes([l & 0xFF, l >> 8]) + code)
+
+def connect_exec(cr, ip="192.168.1.50", port=6626):
+	s = connect(ip, port)
+	execute(cr, s)
+	return s.recv(1024)

asm/creole.py

@@ -75,7 +75,7 @@ class StringArgument(Argument):
 	def __call__(self):
 		b = bytes()
 		for v in self.val:
-			b = b + Argument(ArgType.IMM, int(v, base=16))()
+			b = b + Argument(ArgType.IMM, int(v, base=10))()
 		return b
 
 class LabelArgument(Argument):
@@ -210,6 +210,25 @@ class Instruction(Enum):
 	J = "JE", "_render_j", ArgType.LAB
 	JNE = 10, "_render_default", ArgType.LAB, ArgType.VAL, ArgType.VAL
 	DB = 11, "_render_default", ArgType.DAT, ArgType.STR
+	READ_ADC = 12, "_render_default", ArgType.VAL, ArgType.REG
+	READ_DAC = 13, "_render_default", ArgType.VAL, ArgType.REG
+	WRITE_DAC = 14, "_render_default", ArgType.VAL, ArgType.VAL
+	SLEEP = 15, "_render_default", ArgType.VAL
+	CLOOP_READ = 16, "_render_default", ArgType.VAL, ArgType.REG, ArgType.REG
+	CLOOP_WRITE = 17, "_render_default", ArgType.VAL, ArgType.VAL, ArgType.VAL
+	WF_LOAD = 18, "_render_default", ArgType.VAL, ArgType.DAT
+	WF_ARM = 19, "_render_default", ArgType.VAL, ArgType.VAL, ArgType.VAL
+	SENDVAL = 20, "_render_default", ArgType.VAL
+	SENDDAT = 21, "_render_default", ArgType.DAT
+	WF_DISARM = 22, "_render_default", ArgType.VAL
+	TAKE_ADC = 23, "_render_default", ArgType.VAL, ArgType.VAL
+	RELEASE_ADC = 24, "_render_default", ArgType.VAL
+	TAKE_DAC = 25, "_render_default", ArgType.VAL, ArgType.VAL
+	RELEASE_DAC = 26, "_render_default", ArgType.VAL
+	TAKE_WF = 27, "_render_default", ArgType.VAL, ArgType.VAL
+	RELEASE_WF = 28, "_render_default", ArgType.VAL
+	TAKE_CLOOP = 29, "_render_default", ArgType.VAL
+	RELEASE_CLOOP = 30, "_render_default"
 
 	def __int__(self):
 		""" Returns the opcode associated with the Instruction.
@@ -459,7 +478,7 @@ class Program:
 		assert len(b) < encoding_types[lablen][0]
 		return b
 
-	def __init__(self, reglen=16, datlen=16):
+	def __init__(self, reglen=32, datlen=64):
 		self.asm = []
 		self.reglen = reglen
 		self.datlen = datlen

asm/ffi.py

@@ -60,7 +60,7 @@ class Reader:
 
 class CEnv(Structure):
 	_fields_ = [
-		("dats", POINTER(POINTER(c_ubyte))),
+		("dats", POINTER(CReader)),
 		("datlen", c_size_t),
 		("reg", POINTER(c_uint)),
 		("reglen", c_size_t),
@@ -68,7 +68,8 @@ class CEnv(Structure):
 		("stkptr", c_size_t),
 		("stklen", c_size_t),
 		("r_current", CReader),
-		("r_start", CReader)
+		("r_start", CReader),
+		("fd", c_int)
 	]
 
 class RegisterOverflowError(Exception):
@@ -116,13 +117,7 @@ class Environment:
 	def getdat(self, n):
 		if n >= self.cenv.datlen or n < 0:
 			raise DataOverflowError(n)
-		rdr = CReader()
-		rdr.p = self.cenv.dats[n]
-		# Python does not allow for direct pointer arithmetic
-		rdr_p_v = addressof(rdr.p.contents)
-		r_start_p_v = addressof(self.cenv.r_start.p)
-
-		rdr.left = self.cenv.r_start.left - (rdr_p_v - r_start_p_v)
+		rdr = self.cenv.dats[n]
 
 		l = []
 		w = CWord()
@@ -143,7 +138,7 @@ class Environment:
 
 	def __init__(self, prog=None, reglen=32, datlen=32, stklen=4096, prglen=4096):
 		cenv = CEnv()
-		cenv.dats = (POINTER(c_ubyte) * datlen)()
+		cenv.dats = (CReader * datlen)()
 		cenv.datlen = datlen
 
 		cenv.reglen = reglen

asm/test_comm.py

@@ -0,0 +1,25 @@
+from comm import *
+
+# These require a connection!
+def test_print_char():
+	p = Program()
+	p.parse_asm_line(f"SENDVAL 100")
+	assert connect_exec(p) == b'100'
+
+def test_print_string():
+	p = Program()
+	p.parse_lines([
+		"j .l",
+		f"db d0 {[ord(x) for x in 'hello world']}",
+		".l",
+		"senddat d0"
+	])
+	return connect_exec(p).decode()
+
+def test_run_adc():
+	p = Program()
+	p.parse_lines([
+		"read_adc 0 r0",
+		"sendval r0"
+	])
+	return connect_exec(p).decode()

creole.c

@@ -12,8 +12,17 @@ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
 
-#include "creole.h"
+#ifndef CREOLE_TEST
+# include <zephyr/kernel.h>
+# include <zephyr/logging/log.h>
+# include <zephyr/sys_clock.h>
+# include "access.h"
+# include "control_loop_cmds.h"
+# include "sock.h"
+LOG_MODULE_REGISTER(creole, 4);
+#endif
 
+#include "creole.h"
 /*************************************************************************
  * Static information
  ************************************************************************/
@@ -37,7 +46,7 @@ enum creole_arg_type {
       [i] = v,
  * in C89 indicies are implicit from 0 to the maximum filled-in value.
  */
-#define defop(s, n, a1, a2, a3) {n, {a1, a2, a3}}
+#define defop(s, n, a1, a2, a3) [CREOLE_##s] = {n, {a1, a2, a3}}
 static const struct {
 	int arglen;
 	enum creole_arg_type argtype[CREOLE_MAX_ARG];
@@ -53,7 +62,28 @@ static const struct {
 	defop(JLE, 3, TYPE_IMM, TYPE_VAL, TYPE_VAL),
 	defop(JE, 3, TYPE_IMM, TYPE_VAL, TYPE_VAL),
 	defop(JNE, 3, TYPE_IMM, TYPE_VAL, TYPE_VAL),
-	defop(DB, 1, TYPE_IMM, TYPE_NONE, TYPE_NONE)
+	defop(DB, 1, TYPE_IMM, TYPE_NONE, TYPE_NONE),
+	defop(READ_ADC, 2, TYPE_VAL, TYPE_REG, TYPE_NONE),
+	defop(READ_DAC, 2, TYPE_VAL, TYPE_REG, TYPE_NONE),
+	defop(WRITE_DAC, 2, TYPE_VAL, TYPE_VAL, TYPE_NONE),
+	defop(SLEEP, 1, TYPE_VAL, TYPE_NONE, TYPE_NONE),
+	defop(CLOOP_READ, 2, TYPE_VAL, TYPE_REG, TYPE_NONE),
+	defop(CLOOP_WRITE, 2, TYPE_VAL, TYPE_VAL, TYPE_NONE),
+	defop(WF_LOAD, 2, TYPE_VAL, TYPE_IMM, TYPE_NONE),
+	defop(WF_ARM, 3, TYPE_VAL, TYPE_VAL, TYPE_VAL),
+	defop(SENDVAL, 1, TYPE_VAL, TYPE_NONE, TYPE_NONE),
+	defop(SENDDAT, 1, TYPE_IMM, TYPE_NONE, TYPE_NONE),
+	defop(WF_DISARM, 1, TYPE_VAL, TYPE_NONE, TYPE_NONE),
+	defop(TAKE_ADC, 2, TYPE_VAL, TYPE_VAL, TYPE_NONE),
+	defop(RELEASE_ADC, 1, TYPE_VAL, TYPE_NONE, TYPE_NONE),
+	defop(TAKE_DAC, 2, TYPE_VAL, TYPE_VAL, TYPE_NONE),
+	defop(RELEASE_DAC, 1, TYPE_VAL, TYPE_NONE, TYPE_NONE),
+	defop(TAKE_WF, 2, TYPE_VAL, TYPE_VAL, TYPE_NONE),
+	defop(RELEASE_WF, 1, TYPE_VAL, TYPE_NONE, TYPE_NONE),
+	defop(TAKE_CLOOP, 1, TYPE_VAL, TYPE_NONE, TYPE_NONE),
+	defop(RELEASE_CLOOP, 0, TYPE_NONE, TYPE_NONE, TYPE_NONE),
+	defop(SWITCH_ADC, 2, TYPE_VAL, TYPE_VAL, TYPE_NONE),
+	defop(SWITCH_DAC, 2, TYPE_VAL, TYPE_VAL, TYPE_NONE)
 };
 
 /*************************************************************************
@@ -327,6 +357,7 @@ int creole_encode(creole_word i, unsigned encode_to, unsigned high_bits,
 struct ins {
 	unsigned char *start;
 	unsigned char *datapt;
+	size_t dataptlen;
 	enum creole_opcode opcode;
 	creole_word w[CREOLE_MAX_ARG];
 	creole_word w_flags[CREOLE_MAX_ARG];
@@ -393,10 +424,12 @@ parse_line(struct creole_env *env, struct ins *ins, struct creole_reader *r)
 
 	if (ins->opcode == CREOLE_DB) {
 		ins->datapt = r->p;
+		ins->dataptlen = 0;
 		do {
 			if (!creole_decode(r, &w))
 				return CREOLE_ARG_READ_ERROR;
 		} while (w.len != 1);
+		ins->dataptlen = r->p - ins->datapt - 1;
 		if (w.word != 0)
 			return CREOLE_LAST_READ_ERROR;
 		return CREOLE_COMPILE_OK;
@@ -419,7 +452,8 @@ add_to_env(struct creole_env *env, struct ins *ins)
 {
 	switch (ins->opcode) {
 	case CREOLE_DB:
-		env->dats[ins->w[0]] = ins->datapt;
+		env->dats[ins->w[0]].p = ins->datapt;
+		env->dats[ins->w[0]].left = ins->dataptlen;
 		break;
 	default:
 		;
@@ -526,6 +560,67 @@ int creole_jump(struct creole_env *env, creole_word off)
 	return 1;
 }
 
+#ifndef CREOLE_TEST
+
+static size_t
+load_into_array(const struct creole_reader *start, creole_word *buf, size_t buflen)
+{
+	size_t i = 0;
+	struct creole_word w;
+	struct creole_reader r = *start;
+
+	while (creole_decode(&r, &w) && i < buflen) {
+		buf[i++] = w.word;
+	}
+
+	return i;
+}
+
+static creole_word
+upsilon_load_waveform(struct creole_env *env, creole_word slot,
+                      creole_word db)
+{
+	creole_word buf[MAX_WL_SIZE];
+	size_t len = load_into_array(env->dats + db, buf, ARRAY_SIZE(buf));
+	if (len < MAX_WL_SIZE)
+		return 0;
+	return waveform_load(buf, slot, K_FOREVER);
+}
+
+static creole_word
+upsilon_sendval(struct creole_env *env, creole_word num)
+{
+	char buf[32];
+	struct bufptr bp = {buf, sizeof(buf)};
+
+	return sock_printf(env->fd, &bp, "%u", num) == BUF_OK;
+}
+
+static creole_word
+upsilon_senddat(struct creole_env *env, creole_word db)
+{
+#define SENDDAT_BUFLEN 1024
+	char buf[SENDDAT_BUFLEN];
+	struct bufptr bp = {buf, 0};
+	struct creole_word w;
+	struct creole_reader r = env->dats[db];
+
+	while (creole_decode(&r, &w) && bp.left < SENDDAT_BUFLEN) {
+		if (w.word > 0xFF)
+			return -EINVAL;
+		buf[bp.left++] = w.word;
+	}
+	if (r.left != 0) {
+		return -E2BIG;
+	}
+
+	return sock_write_buf(env->fd, &bp);
+}
+
+#endif /* CREOLE_TEST */
+
+/* Upsilon interface */
+
 #define chk_sign_op(OPER) do {                                       \
 	switch (check_sign_bits(ins.w_flags[1], ins.w_flags[2]))   { \
 	case ALL_UNSIGNED:                                           \
@@ -559,25 +654,32 @@ enum creole_run_ret creole_step(struct creole_env *env, creole_word *sc)
 
 	switch (ins.opcode) {
 	case CREOLE_DB:
-		env->dats[ins.w[0]] = ins.datapt;
+		env->dats[ins.w[0]].p = ins.datapt;
+		env->dats[ins.w[0]].left = ins.dataptlen;
+		break;
+
 	case CREOLE_PUSH:
 		check(read_val(env, &ins, 0, &a1));
 		check(creole_push(env, a1));
 		break;
+
 	case CREOLE_POP:
 		check(creole_pop(env, &a1));
 		check(creole_reg_write(env, ins.w[0], a1));
 		break;
+
 	case CREOLE_ADD:
 		check(read_val(env, &ins, 1, &a1));
 		check(read_val(env, &ins, 2, &a2));
 		check(creole_reg_write(env, ins.w[0], a1 + a2));
 		break;
+
 	case CREOLE_MUL:
 		check(read_val(env, &ins, 1, &a1));
 		check(read_val(env, &ins, 2, &a2));
 		check(creole_reg_write(env, ins.w[0], a1 * a2));
 		break;
+
 	case CREOLE_DIV:
 		check(read_val(env, &ins, 1, &a1));
 		check(read_val(env, &ins, 2, &a2));
@@ -587,10 +689,12 @@ enum creole_run_ret creole_step(struct creole_env *env, creole_word *sc)
 		chk_sign_op(/);
 		check(creole_reg_write(env, ins.w[0], a1));
 		break;
+
 	case CREOLE_SYS:
 		check(read_val(env, &ins, 0, sc));
 		rcode = CREOLE_STEP_SYSCALL;
 		break;
+
 	case CREOLE_JL:
 		check(read_val(env, &ins, 0, &a0));
 		check(read_val(env, &ins, 1, &a1));
@@ -599,6 +703,7 @@ enum creole_run_ret creole_step(struct creole_env *env, creole_word *sc)
 		if (a1 && !creole_jump(env, a0))
 				return CREOLE_JUMP_OVERFLOW;
 		break;
+
 	case CREOLE_JLE:
 		check(read_val(env, &ins, 0, &a0));
 		check(read_val(env, &ins, 1, &a1));
@@ -607,6 +712,7 @@ enum creole_run_ret creole_step(struct creole_env *env, creole_word *sc)
 		if (a1 && !creole_jump(env, a0))
 				return CREOLE_JUMP_OVERFLOW;
 		break;
+
 	case CREOLE_JE:
 		check(read_val(env, &ins, 0, &a0));
 		check(read_val(env, &ins, 1, &a1));
@@ -614,6 +720,7 @@ enum creole_run_ret creole_step(struct creole_env *env, creole_word *sc)
 		if (a1 == a2 && !creole_jump(env, a0))
 			return CREOLE_JUMP_OVERFLOW;
 		break;
+
 	case CREOLE_JNE:
 		check(read_val(env, &ins, 0, &a0));
 		check(read_val(env, &ins, 1, &a1));
@@ -621,8 +728,151 @@ enum creole_run_ret creole_step(struct creole_env *env, creole_word *sc)
 		if (a1 != a2 && !creole_jump(env, a0))
 			return CREOLE_JUMP_OVERFLOW;
 		break;
+
+#ifndef CREOLE_TEST
+
+	case CREOLE_READ_ADC:
+		check(read_val(env, &ins, 0, &a0));
+		a1 = adc_read(a0, K_FOREVER, &a2);
+		check(creole_reg_write(env, ins.w[1], a2));
+		check(creole_push(env, a1));
+		break;
+
+	case CREOLE_READ_DAC:
+		check(read_val(env, &ins, 0, &a0));
+		a1 = dac_read_write(a0, 0x1 << 23 | 0x1 << 20, K_FOREVER, NULL);
+		if (a1 == 0) {
+			a1 = dac_read_write(a0, 0, K_FOREVER, &a2);
+			check(creole_reg_write(env, ins.w[1], a2));
+		}
+		check(creole_push(env, a1));
+		break;
+
+	case CREOLE_WRITE_DAC:
+		check(read_val(env, &ins, 0, &a0));
+		check(read_val(env, &ins, 1, &a1));
+
+		a2 = dac_read_write(a0, 0x1 << 20 | a1, K_FOREVER, NULL);
+		check(creole_push(env, a2));
+		break;
+
+	case CREOLE_SLEEP:
+		check(read_val(env, &ins, 0, &a0));
+		k_sleep(K_USEC(a0));
+		check(creole_push(env, 0));
+		break;
+
+	case CREOLE_CLOOP_READ:
+		check(read_val(env, &ins, 0, &a0));
+		check(read_val(env, &ins, 0, &a1));
+		check(read_val(env, &ins, 0, &a2));
+
+		if (valid_register(env, a1) && valid_register(env, a2)) {
+			a0 = cloop_read(a0, env->reg + a1, env->reg + a2, K_FOREVER);
+			check(creole_push(env, a0));
+		} else {
+			check(creole_push(env, -EINVAL));
+		}
+
+		break;
+
+	case CREOLE_CLOOP_WRITE:
+		check(read_val(env, &ins, 0, &a0));
+		check(read_val(env, &ins, 0, &a1));
+		check(read_val(env, &ins, 0, &a2));
+
+		a0 = cloop_write(a0, a1, a2, K_FOREVER);
+		check(creole_push(env, a0));
+		break;
+
+	case CREOLE_WF_LOAD:
+		check(read_val(env, &ins, 0, &a0));
+		check(read_val(env, &ins, 1, &a1));
+		check(creole_push(env, upsilon_load_waveform(env, a0, a1)));
+		break;
+
+	case CREOLE_WF_ARM:
+		check(read_val(env, &ins, 0, &a0));
+		check(read_val(env, &ins, 1, &a1));
+		check(read_val(env, &ins, 2, &a2));
+
+		check(creole_push(env, waveform_arm(a0, a1, a2, K_FOREVER)));
+		break;
+
+	case CREOLE_WF_DISARM:
+		check(read_val(env, &ins, 0, &a0));
+		check(creole_push(env, waveform_disarm(a0)));
+		break;
+
+	case CREOLE_SENDVAL:
+		check(read_val(env, &ins, 0, &a0));
+		check(creole_push(env, upsilon_sendval(env, a0)));
+		break;
+
+	case CREOLE_SENDDAT:
+		check(read_val(env, &ins, 0, &a0));
+		check(creole_push(env, upsilon_senddat(env, a0)));
+		break;
+
+	case CREOLE_TAKE_ADC:
+		check(read_val(env, &ins, 0, &a0));
+		check(read_val(env, &ins, 0, &a1));
+		check(creole_push(env, adc_take(a0, K_USEC(a1))));
+		break;
+
+	case CREOLE_RELEASE_ADC:
+		check(read_val(env, &ins, 0, &a0));
+		check(creole_push(env, adc_release(a0)));
+		break;
+
+	case CREOLE_TAKE_DAC:
+		check(read_val(env, &ins, 0, &a0));
+		check(read_val(env, &ins, 0, &a1));
+		check(creole_push(env, dac_take(a0, K_USEC(a1))));
+		break;
+
+	case CREOLE_RELEASE_DAC:
+		check(read_val(env, &ins, 0, &a0));
+		check(creole_push(env, dac_release(a0)));
+		break;
+
+	case CREOLE_TAKE_WF:
+		check(read_val(env, &ins, 0, &a0));
+		check(read_val(env, &ins, 0, &a1));
+		check(creole_push(env, waveform_take(a0, K_USEC(a1))));
+		break;
+
+	case CREOLE_RELEASE_WF:
+		check(read_val(env, &ins, 0, &a0));
+		check(creole_push(env, waveform_release(a0)));
+		break;
+
+	case CREOLE_TAKE_CLOOP:
+		check(read_val(env, &ins, 0, &a0));
+		check(creole_push(env, cloop_take(K_USEC(a0))));
+		break;
+
+	case CREOLE_RELEASE_CLOOP:
+		check(creole_push(env, cloop_release()));
+		break;
+
+	case CREOLE_SWITCH_ADC:
+		check(read_val(env, &ins, 0, &a0));
+		check(read_val(env, &ins, 1, &a1));
+		check(creole_push(env, adc_switch(a0, a1, K_FOREVER)));
+		break;
+
+	case CREOLE_SWITCH_DAC:
+		check(read_val(env, &ins, 0, &a0));
+		check(read_val(env, &ins, 1, &a1));
+		check(creole_push(env, dac_switch(a0, a1, K_FOREVER)));
+		break;
+
+#endif /* CREOLE_TEST */
+
 	default:
 		rcode = CREOLE_STEP_UNKNOWN_OPCODE;
+		break;
 	}
 
 	return rcode;

creole.h

@@ -34,18 +34,39 @@ typedef CREOLE_WORD creole_word;
 typedef CREOLE_SIGNED_WORD creole_signed;
 
 enum creole_opcode {
-	CREOLE_NOOP,
-	CREOLE_PUSH,
-	CREOLE_POP,
-	CREOLE_ADD,
-	CREOLE_MUL,
-	CREOLE_DIV,
-	CREOLE_SYS,
-	CREOLE_JL,
-	CREOLE_JLE,
-	CREOLE_JE,
-	CREOLE_JNE,
-	CREOLE_DB,
+	CREOLE_NOOP = 0,
+	CREOLE_PUSH = 1,
+	CREOLE_POP = 2,
+	CREOLE_ADD = 3,
+	CREOLE_MUL = 4,
+	CREOLE_DIV = 5,
+	CREOLE_SYS = 6,
+	CREOLE_JL = 7,
+	CREOLE_JLE = 8,
+	CREOLE_JE = 9,
+	CREOLE_JNE = 10,
+	CREOLE_DB = 11,
+	CREOLE_READ_ADC = 12,
+	CREOLE_READ_DAC = 13,
+	CREOLE_WRITE_DAC = 14,
+	CREOLE_SLEEP = 15,
+	CREOLE_CLOOP_READ = 16,
+	CREOLE_CLOOP_WRITE = 17,
+	CREOLE_WF_LOAD = 18,
+	CREOLE_WF_ARM = 19,
+	CREOLE_SENDVAL = 20,
+	CREOLE_SENDDAT = 21,
+	CREOLE_WF_DISARM = 22,
+	CREOLE_TAKE_ADC = 23,
+	CREOLE_RELEASE_ADC = 24,
+	CREOLE_TAKE_DAC = 25,
+	CREOLE_RELEASE_DAC = 26,
+	CREOLE_TAKE_WF = 27,
+	CREOLE_RELEASE_WF = 28,
+	CREOLE_TAKE_CLOOP = 29,
+	CREOLE_RELEASE_CLOOP = 30,
+	CREOLE_SWITCH_ADC = 31,
+	CREOLE_SWITCH_DAC = 32,
 	CREOLE_OPCODE_LEN
 };
 
@@ -96,7 +117,7 @@ struct creole_reader {
 };
 
 struct creole_env {
-	unsigned char **dats;
+	struct creole_reader *dats;
 	size_t datlen;
 
 	creole_word *reg;
@@ -107,6 +128,8 @@ struct creole_env {
 
 	struct creole_reader r_current;
 	struct creole_reader r_start;
+
+	int fd;
 };
 
 int creole_decode(struct creole_reader *r, struct creole_word *w);