verilog自动售票状态机有找零功能
时间: 2024-06-07 09:08:42 浏览: 5
Verilog自动售票状态机可以有找零功能。一种实现方式是在状态机中添加一个找零模块,该模块负责计算需要找回的金额并将其发送到找零器。找零器则根据收到的金额计算出需要找回的硬币或纸币数量,并将它们返回给用户。该过程可以通过在状态机中添加状态来实现,例如"等待用户取走找零"的状态。在这种实现方式中,售票机的状态机需要能够接收用户投入的硬币和纸币,并在用户购买票时计算出需要找回的金额。
相关问题
verilog自动售票状态机
以下是一个简单的 Verilog 自动售票状态机示例:
```verilog
module ticket_vending_machine(
input clk,
input reset,
input coin,
input button,
output reg ticket
);
// 状态定义
typedef enum logic [1:0] {
IDLE,
COIN_INSERTED,
TICKET_ISSUED
} state_e;
// 状态变量和初始状态
state_e state, next_state = IDLE;
// 状态转移逻辑
always @ (posedge clk, posedge reset) begin
if (reset) begin
state <= IDLE;
end else begin
state <= next_state;
end
end
// 状态操作逻辑
always @ (state, coin, button) begin
case (state)
IDLE: begin
if (coin) begin
next_state = COIN_INSERTED;
end else begin
next_state = IDLE;
end
end
COIN_INSERTED: begin
if (button) begin
next_state = TICKET_ISSUED;
end else if (coin) begin
next_state = COIN_INSERTED;
end else begin
next_state = IDLE;
end
end
TICKET_ISSUED: begin
next_state = IDLE;
end
default: begin
next_state = IDLE;
end
endcase
end
// 输出操作
always @ (state) begin
case (state)
TICKET_ISSUED: begin
ticket = 1;
end
default: begin
ticket = 0;
end
endcase
end
endmodule
```
该状态机有三种状态:IDLE(空闲)、COIN_INSERTED(硬币已插入)和TICKET_ISSUED(票已发放)。插入硬币将状态从IDLE转移到COIN_INSERTED,按下按钮将状态从COIN_INSERTED转移到TICKET_ISSUED,票发放后状态将返回IDLE。
verilog找零自动售货机
Verilog是一种硬件描述语言,用于设计和描述数字电路。自动售货机是一种常见的应用,可以使用Verilog来实现其功能。
在Verilog中,可以使用状态机的方式来描述自动售货机的行为。以下是一个简单的Verilog代码示例,用于实现找零自动售货机:
```verilog
module VendingMachine (
input clk, // 时钟信号
input reset, // 复位信号
input coin, // 投币信号
input select, // 选择商品信号
output reg vend, // 售货信号
output reg change // 找零信号
);
// 状态定义
typedef enum logic [2:0] {
IDLE,
COIN_INSERTED,
PRODUCT_SELECTED,
CHANGE_RETURNED
} State;
// 状态寄存器和下一个状态逻辑
reg [2:0] current_state;
reg [2:0] next_state;
always @(posedge clk or posedge reset) begin
if (reset) begin
current_state <= IDLE;
end else begin
current_state <= next_state;
end
end
// 状态转移逻辑
always @(current_state) begin
case (current_state)
IDLE:
if (coin) begin
next_state = COIN_INSERTED;
end else begin
next_state = IDLE;
end
COIN_INSERTED:
if (select) begin
next_state = PRODUCT_SELECTED;
end else if (coin) begin
next_state = COIN_INSERTED;
end else begin
next_state = IDLE;
end
PRODUCT_SELECTED:
if (coin) begin
next_state = CHANGE_RETURNED;
end else begin
next_state = IDLE;
end
CHANGE_RETURNED:
next_state = IDLE;
endcase
end
// 输出逻辑
always @(current_state) begin
case (current_state)
IDLE:
vend = 0;
change = 0;
COIN_INSERTED:
vend = 0;
change = 0;
PRODUCT_SELECTED:
vend = 1;
change = 0;
CHANGE_RETURNED:
vend = 0;
change = 1;
endcase
end
endmodule
```
上述代码中,使用了一个状态机来描述自动售货机的行为。自动售货机有四个状态:IDLE(空闲状态)、COIN_INSERTED(投币状态)、PRODUCT_SELECTED(商品选择状态)和CHANGE_RETURNED(找零状态)。根据输入信号的不同,自动售货机会在不同的状态之间进行转移,并输出售货和找零信号。