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timer irq changes

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This commit is contained in:
Irmen de Jong 2018-03-04 16:36:05 +01:00
parent 8bfe21dd65
commit 12ae95bbbc
4 changed files with 67 additions and 53 deletions
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2
testvm-timer.txt
View File

@ -1,7 +1,7 @@
; source code for a tinyvm program for the timer
%block b1_timer
%vardefs
var byte teller_timer 0
var byte teller_timer 32
const word screenloc_timer 1028
const byte one_timer 1
%end_vardefs

2
testvm.txt
View File

@ -5,7 +5,7 @@ var word teller 0
var word numbertoprint 0
const byte one 1
const word thousand 1000
const byte space_chr 10
const byte space_chr 32
const word screenstart 1024
%end_vardefs

7
tinyvm/program.py
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@ -1,7 +1,7 @@
import enum
import array
import operator
from typing import List, Dict, Optional, Union, Callable
from typing import List, Dict, Optional, Union, Callable, Any
class Opcode(enum.IntEnum):
@ -109,7 +109,9 @@ class Value:
def __floordiv__(self, other: 'Value') -> 'Value':
return self.number_arithmetic(self, operator.floordiv, other)
def __eq__(self, other: 'Value') -> bool:
def __eq__(self, other: Any) -> bool:
if not isinstance(other, Value):
return False
return self.number_comparison(self, operator.eq, other)
def __lt__(self, other: 'Value') -> bool:
@ -125,7 +127,6 @@ class Value:
return self.number_comparison(self, operator.ge, other)
class Variable:
__slots__ = ["name", "value", "dtype", "length", "height", "const"]

109
tinyvm/vm.py
View File

@ -51,7 +51,7 @@
# call function (arguments are on stack)
# enter / exit (function call frame)
#
# TIMER INTERRUPT: triggered around each 1/30th of a second.
# TIMER INTERRUPT: triggered around each 1/60th of a second.
# executes on a DIFFERENT stack and with a different PROGRAM LIST,
# but with access to ALL THE SAME DYNAMIC VARIABLES.
# This suspends the main program until the timer program RETURNs!
@ -65,7 +65,7 @@ import threading
import pprint
import tkinter
import tkinter.font
from typing import Dict, List, Tuple, Union
from typing import Dict, List, Tuple, Union, no_type_check
from il65.emit import mflpt5_to_float, to_mflpt5
from .program import Instruction, Variable, Block, Program, Opcode, Value, DataType
@ -224,8 +224,6 @@ class VM:
str_alt_encoding = "iso-8859-15"
readonly_mem_ranges = [] # type: List[Tuple[int, int]]
timer_irq_resolution = 1/30
timer_irq_interlock = threading.Lock()
timer_irq_event = threading.Event()
def __init__(self, program: Program, timerprogram: Program=None) -> None:
opcode_names = [oc.name for oc in Opcode]
@ -263,7 +261,6 @@ class VM:
if i.opcode in (Opcode.CALL, Opcode.JUMP_IF_FALSE, Opcode.JUMP_IF_TRUE)), "main: alt_nexts must be set"
assert all(i.alt_next for i in self.timer_program
if i.opcode in (Opcode.CALL, Opcode.JUMP_IF_FALSE, Opcode.JUMP_IF_TRUE)), "timer: alt_nexts must be set"
threading.Thread(target=self.timer_irq, name="timer_irq", daemon=True).start()
print("[TinyVM starting up.]")
def enable_charscreen(self, screen_address: int, width: int, height: int) -> None:
@ -339,15 +336,24 @@ class VM:
threading.Thread(target=ScreenViewer.create,
args=(self.memory, self.system, self.charscreen_address, self.charscreen_width, self.charscreen_height),
name="screenviewer", daemon=True).start()
time.sleep(0.05)
self.pc = self.program[0] # first instruction of the main program
self.stack.push(CallFrameMarker(None)) # enter the call frame so the timer program can end with a RETURN
try:
counter = 0
previous_timer_irq = time.perf_counter()
while self.pc is not None:
with self.timer_irq_interlock:
next_pc = self.dispatch_table[self.pc.opcode](self, self.pc)
if next_pc:
self.pc = self.pc.next
next_pc = self.dispatch_table[self.pc.opcode](self, self.pc)
if next_pc:
self.pc = self.pc.next
counter += 1
if self.charscreen_address and counter % 1000 == 0:
time.sleep(0.001) # allow the tkinter window to update
time_since_irq = time.perf_counter() - previous_timer_irq
if time_since_irq > 1/60:
self.timer_irq()
previous_timer_irq = time.perf_counter()
except TerminateExecution as x:
why = str(x)
print("[TinyVM execution terminated{:s}]\n".format(": "+why if why else "."))
@ -360,34 +366,23 @@ class VM:
print("[TinyVM execution ended.]")
def timer_irq(self) -> None:
# This is the timer 'irq' handler. It runs the timer program at a certain interval.
# NOTE: executing the timer program will LOCK the main program and vice versa!
# (because the VM is a strictly single threaded machine)
resolution = 1/30
wait_time = resolution
while True:
self.timer_irq_event.wait(wait_time)
self.timer_irq_event.clear()
start = time.perf_counter()
if self.timer_program:
with self.timer_irq_interlock:
previous_pc = self.pc
previous_program = self.program
previous_stack = self.stack
self.stack = self.timer_stack
self.program = self.timer_program
self.pc = self.program[0]
self.stack.push(CallFrameMarker(None)) # enter the call frame so the timer program can end with a RETURN
while self.pc is not None:
next_pc = self.dispatch_table[self.pc.opcode](self, self.pc)
if next_pc:
self.pc = self.pc.next
self.pc = previous_pc
self.program = previous_program
self.stack = previous_stack
current = time.perf_counter()
duration, previously = current - start, current
wait_time = max(0, resolution - duration)
# This is the timer 'irq' handler. It is called to run the timer program at a certain interval.
# During the execution the main program is halted
if self.timer_program:
previous_pc = self.pc
previous_program = self.program
previous_stack = self.stack
self.stack = self.timer_stack
self.program = self.timer_program
self.pc = self.program[0]
self.stack.push(CallFrameMarker(None)) # enter the call frame so the timer program can end with a RETURN
while self.pc is not None:
next_pc = self.dispatch_table[self.pc.opcode](self, self.pc)
if next_pc:
self.pc = self.pc.next
self.pc = previous_pc
self.program = previous_program
self.stack = previous_stack
def debug_stack(self, size: int=5) -> None:
stack = self.stack.debug_peek(size)
@ -416,7 +411,7 @@ class VM:
raise TerminateExecution()
def opcode_PUSH(self, instruction: Instruction) -> bool:
value = self.variables[instruction.args[0]].value
value = self.variables[instruction.args[0]].value # type: ignore
self.stack.push(value)
return True
@ -435,12 +430,14 @@ class VM:
self.stack.push2(value2, value1)
return True
@no_type_check
def opcode_PUSH2(self, instruction: Instruction) -> bool:
value1 = self.variables[instruction.args[0]].value
value2 = self.variables[instruction.args[1]].value
self.stack.push2(value1, value2)
return True
@no_type_check
def opcode_PUSH3(self, instruction: Instruction) -> bool:
value1 = self.variables[instruction.args[0]].value
value2 = self.variables[instruction.args[1]].value
@ -448,12 +445,14 @@ class VM:
self.stack.push3(value1, value2, value3)
return True
@no_type_check
def opcode_POP(self, instruction: Instruction) -> bool:
value = self.stack.pop()
variable = self.variables[instruction.args[0]]
self.assign_variable(variable, value)
return True
@no_type_check
def opcode_POP2(self, instruction: Instruction) -> bool:
value1, value2 = self.stack.pop2()
variable = self.variables[instruction.args[0]]
@ -462,6 +461,7 @@ class VM:
self.assign_variable(variable, value2)
return True
@no_type_check
def opcode_POP3(self, instruction: Instruction) -> bool:
value1, value2, value3 = self.stack.pop3()
variable = self.variables[instruction.args[0]]
@ -472,24 +472,28 @@ class VM:
self.assign_variable(variable, value3)
return True
@no_type_check
def opcode_ADD(self, instruction: Instruction) -> bool:
second, first = self.stack.pop2()
self.stack.push(first + second) # type: ignore
self.stack.push(first + second)
return True
@no_type_check
def opcode_SUB(self, instruction: Instruction) -> bool:
second, first = self.stack.pop2()
self.stack.push(first - second) # type: ignore
self.stack.push(first - second)
return True
@no_type_check
def opcode_MUL(self, instruction: Instruction) -> bool:
second, first = self.stack.pop2()
self.stack.push(first * second) # type: ignore
self.stack.push(first * second)
return True
@no_type_check
def opcode_DIV(self, instruction: Instruction) -> bool:
second, first = self.stack.pop2()
self.stack.push(first / second) # type: ignore
self.stack.push(first / second)
return True
def opcode_AND(self, instruction: Instruction) -> bool:
@ -522,21 +526,25 @@ class VM:
self.stack.push(Value(DataType.BOOL, first == second))
return True
@no_type_check
def opcode_CMP_LT(self, instruction: Instruction) -> bool:
second, first = self.stack.pop2()
self.stack.push(Value(DataType.BOOL, first < second))
return True
@no_type_check
def opcode_CMP_GT(self, instruction: Instruction) -> bool:
second, first = self.stack.pop2()
self.stack.push(Value(DataType.BOOL, first > second))
return True
@no_type_check
def opcode_CMP_LTE(self, instruction: Instruction) -> bool:
second, first = self.stack.pop2()
self.stack.push(Value(DataType.BOOL, first <= second))
return True
@no_type_check
def opcode_CMP_GTE(self, instruction: Instruction) -> bool:
second, first = self.stack.pop2()
self.stack.push(Value(DataType.BOOL, first >= second))
@ -632,7 +640,7 @@ class System:
value = self.vm.stack.pop()
assert isinstance(value, Value)
if value.dtype == DataType.ARRAY_BYTE:
print(self.decodestr(value.value), end="@") # type: ignore
print(self.decodestr(value.value), end="") # type: ignore
return True
else:
raise TypeError("printstr expects bytearray", value)
@ -656,6 +664,7 @@ class System:
def syscall_decimalstr_signed(self) -> bool:
value = self.vm.stack.pop()
assert isinstance(value, Value)
if value.dtype in (DataType.SBYTE, DataType.SWORD):
self.vm.stack.push(Value(DataType.ARRAY_BYTE, self.encodestr(str(value.value))))
return True
@ -664,6 +673,7 @@ class System:
def syscall_decimalstr_unsigned(self) -> bool:
value = self.vm.stack.pop()
assert isinstance(value, Value)
if value.dtype in (DataType.BYTE, DataType.WORD):
self.vm.stack.push(Value(DataType.ARRAY_BYTE, self.encodestr(str(value.value))))
return True
@ -737,7 +747,8 @@ class System:
class ScreenViewer(tkinter.Tk):
def __init__(self, memory: Memory, system: System, screen_addr: int, screen_width: int, screen_height: int) -> None:
super().__init__()
self.fontsize = 14
self.title("IL65 tinyvm")
self.fontsize = 16
self.memory = memory
self.system = system
self.address = screen_addr
@ -751,11 +762,13 @@ class ScreenViewer(tkinter.Tk):
def update_screen(self):
self.canvas.delete(tkinter.ALL)
lines = []
for y in range(self.height):
line = self.memory.get_bytes(self.address+y*self.width, self.width)
text = self.system.decodestr(line)
self.canvas.create_text(4, self.fontsize*y, text=text, fill="white", font=self.monospace, anchor=tkinter.NW)
self.after(10, self.update_screen)
line = self.system.decodestr(self.memory.get_bytes(self.address+y*self.width, self.width))
lines.append("".join(c if c.isprintable() else " " for c in line))
for y, line in enumerate(lines):
self.canvas.create_text(4, self.fontsize*y, text=line, fill="white", font=self.monospace, anchor=tkinter.NW)
self.after(30, self.update_screen)
@classmethod
def create(cls, memory: Memory, system: System, screen_addr: int, screen_width: int, screen_height: int) -> None: