circuit-reactive-simulation
所属分类：硬件设计
开发工具：Python
文件大小：0KB
下载次数：0
上传日期：2023-12-09 18:36:53
上 传 者：
sh-1993
说明： 用Python中的 React编程模拟数字电路
(Simulate digital circuit by reactive programming in Python)
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circuit-reactive-simulation.py
# circuit-reactive-simulation
Simulate digital circuit using reactive programming in Python
## Usage
Design and simulate combinational and sequential circuits in Python
The value of a wire is determined by functions defined for primary inputs or other wires
Design these functions in Python and simulate the circuit by assigning values to primary inputs
The program has registers with asynchronous reset and load value
## How it works
Wires in the circuit act as both observers and observables in reactive programming, allowing for the composition of multi-level circuits
When the values of observables update, the wire recalculates and updates its new value, notifying its subscribers of the changes
The software also prevents accidental direct value assignment to wires
ReactiveX for Python (RxPY) library is employed for reactive programming
## Examples
Design and simulate counter and full adder circuit
Design and simulate in Python:
```python
def module_counter(clk, reset_value):
seq = CreateSeq(clk, reset_value)
Q = seq.get_Q()
seq.set_f(lambda Q: Q+1, Q)
return Q
def test_counter():
clk = CreateClock()
Q = module_counter(clk, reset_value=10)
print('Q <= Q+1')
print(Q.value)
for _ in range(3):
clk.tick()
print(int(Q.value))
test_counter()
def module_half_adder(i_a, i_b):
o_s = CreateWire(lambda i_a, i_b: i_a != i_b, i_a, i_b) # Sum
o_c = CreateWire(lambda i_a, i_b: i_a and i_b, i_a, i_b) # Carry
return o_c, o_s
def module_full_adder(i_a, i_b, i_c):
o_c0, o_s0 = module_half_adder(i_a, i_b)
o_c1, o_s1 = module_half_adder(o_s0, i_c)
o_s = CreateWire(lambda o_s1: o_s1, o_s1)
o_c = CreateWire(lambda o_c0, o_c1: o_c0 or o_c1, o_c0, o_c1)
return o_c, o_s
def test_module_full_adder():
i_a = CreatePrimaryInput(0)
i_b = CreatePrimaryInput(0)
i_c = CreatePrimaryInput(0)
o_c, o_s = module_full_adder(i_a, i_b, i_c)
print('Full adder')
print('a b i , o s')
for _ in range(2**3):
i_a.value = _ & 1
_ >>= 1
i_b.value = _ & 1
_ >>= 1
i_c.value = _ & 1
print(int(i_a.value), int(i_b.value), int(i_c.value), ',', int(o_c.value), int(o_s.value))
test_module_full_adder()
```
Simulation result:
```
$ ./circuit-reactive-simulation.py
Q <= Q+1
10
11
12
13
Q <= !Q
0
1
0
1
Half adder
a b , c s
0 0 , 0 0
1 0 , 0 1
0 1 , 0 1
1 1 , 1 0
Full adder
a b i , o s
0 0 0 , 0 0
1 0 0 , 0 1
0 1 0 , 0 1
1 1 0 , 1 0
0 0 1 , 0 1
1 0 1 , 1 0
0 1 1 , 1 0
1 1 1 , 1 1
```
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