lcd1602 verilog

void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};

/* GPIO Ports Clock Enable */
__HAL_RCC以下是一个简单的LCD1602的Verilog代码实现：

module lcd1602(
    input clk,
_GPIOA_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOA, GPIO_PIN_0|GPIO_PIN_    input rst,
    input [7:0] data_in,
    input rs,
    input rw,
    input en,
    output reg1|GPIO_PIN_2, GPIO_PIN_RESET);

  /*Configure GPIO pins : PA0 PA1 PA2 */
  GPIO_InitStruct.Pin = [7:0] data_out,
    output reg busy
);

reg [7:0] addr;
reg [7:0] data GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull;
reg [7:0] data_out_reg;
reg [3:0] state;

initial begin
    addr = 8'h00 = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

}

/**
;
    state = 4'h0;
    data_out_reg = 8'h00;
end

always @(posedge clk, posedge  * @brief FLASH Initialization Function
  * @param None
  * @retval None
  */
static void MX_FLASH_Init(void)
 rst) begin
    if (rst) begin
        addr <= 8'h00;
        data <= 8'h00;
        data{
  HAL_FLASH_Unlock();  // 解锁FLASH
  __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_ALL_ERRORS);  // 清除_out_reg <= 8'h00;
        busy <= 1'b0;
        state <= 4'h0;
    end else begin
错误标志位
}

/**
  * @brief This function is executed in case of error occurrence.
  * @retval None
  */
        case (state)
            4'h0: begin  // Wait for the initialization of LCD
                if (clk_count < 500void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error) begin
                    state <= 4'h0;
                    busy <= 1'b1;
                end else begin
                    state <= 4 return state */
  while(1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

在这段代码中'h1;
busy <= 1'b0;
end
end
4'h1: begin // Initialization of LCD，我们使用了STM32的HAL库来控制GPIO、串口和EEPROM。在`main()`函数中，我们首
addr <= 8'h00;
data <= 8'h38;
state <= 4'h2;
busy <= 先发送进入地址设置状态的指令，然后进行轮询，检查地址是否正确。如果检测到瓶子1'b1;
end
4'h2: begin // Initialization of LCD
addr <= 8'h00;
放在了对应的地址上，我们就点亮对应的LED，并在LED上闪烁三次。在检查 data <= 8'h0E;
state <= 4'h3;
busy <= 1'b1;
end
完所有的地址后，我们根据LED的状态和是否放置了正确的瓶子来决定点亮红灯还4'h3: begin // Initialization of LCD
addr <= 8'h00;
data <= 8'h06;
state是绿灯，并发送完成地址设置的指令，然后进入工作状态，运行其他工作代码。

需要注意 <= 4'h4;
busy <= 1'b1;
end
4'h4: begin // Initialization of LCD的是，这段代码中使用了STM32L051C8T6的内部EEPROM存储，需要在MX_FLASH
addr <= 8'h00;
data <= 8'h01;
state <= 4'h5;
busy <= _Init()函数中解锁FLASH，并清除错误标志位。另外，需要根据具体的硬件和场景进行调