**Name:** W25Q64 SPI Read/Write Control in Verilog for Gowin
**Software:** Gowin IDE
**Language:** Verilog
**Code Functionality:** Implements read/write operations for the W25Q64 SPI Flash, ID reading, and data display, controlled by buttons for read/write operations and a seven-segment display, suitable for embedded storage systems.
**Code Implementation Approach:**
This design implements SPI Flash read/write control in a modular manner. The top-level module collects user input through button debouncing, the SPI control module generates read/write requests, the SPI interface module is responsible for timing communication with the Flash, and the display module provides real-time feedback on operation status. The overall design uses a state machine to ensure a clear and reliable operation flow, with coordinated modules that facilitate expansion and debugging.
This code has been validated on a development board.
**Code Structure:**
– top: Top-level module that coordinates all functional modules for overall control.
– key_jitter: Button debouncing module that provides stable button signals.
– spi_control: SPI read/write control module that generates data read/write requests.
– spi_interface: SPI interface module that implements data timing communication with the Flash.
– spi_read_ctrl: Read control module that implements reading of Flash ID and data.
– spi_write_ctrl: Write control module that implements data writing and erasing operations.
– display: Seven-segment display module that shows the current operation status in real-time.
1、 Project Files
2、 Program Files
3、 Program Compilation
4、 RTL Diagram
5、 Pin Assignment
## Code Preview
// The following are the first 100 lines of top.v
// Press key[2] to write data
// Press key[1] to read data
// Press key[0] to read ID
module top( input clk, input rst_n, input [2:0] key_in, input key_shift,// Switch display content input miso,// Master samples slave transmission output mosi,// Master sends to slave output sclk,// Serial clock output cs_n, // Chip select signal output [3:0] bit_select,// Seven-segment bit selection output [7:0] seg_select// Seven-segment segment selection);
wire [2:0] key_out;
wire req;
wire done;
wire [7:0] rx_data;
wire [7:0] tx_data;
wire [23:0] seg_data; // Button debouncing
key_jitter i0_key_jitter( .clkin(clk), .key_in(key_in[0]), // Input .key_negedge(key_out[0]) // Debounced button falling edge);
// Button debouncing
key_jitter i1_key_jitter( .clkin(clk), .key_in(key_in[1]), // Input .key_negedge(key_out[1]) // Debounced button falling edge);
// Button debouncing
key_jitter i2_key_jitter( .clkin(clk), .key_in(key_in[2]), // Input .key_negedge(key_out[2]) // Debounced button falling edge);
spi_control u_spi_control( .clk(clk), .rst_n(rst_n), .key_out(key_out), .din(rx_data), .done(done), .dout(tx_data), .req(req), .seg_data(seg_data));
spi_interface u_spi_interface( .clk(clk), .rst_n(rst_n), .din(tx_data), .req(req), .dout(rx_data), .done(done), .miso(miso), .mosi(mosi), .sclk(sclk), .cs_n(cs_n));// Display module
display i_display( .clk(clk), .rst_n(rst_n), .key_shift(key_shift), .key_in(key_out), .seg_data(seg_data), .bit_select(bit_select), .seg_select(seg_select));
endmodule