使用vivado2020.2,用zybo板,气压温度湿度传感器(BME280),128x32像素单色OLED屏Pmod OLED开发一个软件,要求:利用气压温度湿度传感器测量环境,并将数据显示在128x32像素单色OLED屏上,请给出详细verilog代码和详细的实现过程
时间: 2023-12-03 22:03:20 浏览: 76
以下是一个基本的实现思路,包含部分Verilog代码,供参考:
1. 确定硬件接口:BME280可以通过I2C接口与ZYBO板连接,而Pmod OLED则可以通过SPI接口与ZYBO板连接。
2. 编写I2C和SPI通信的Verilog模块,这些模块需要定义通信协议和相应的寄存器地址。以下是一个简单的I2C通信模块的例子:
```verilog
module i2c_master (
input rst, clk,
input sda_in,
output reg sda_out,
output reg sck
);
reg [7:0] addr;
reg [7:0] data;
reg [2:0] state;
localparam IDLE = 0, START = 1, SEND_ADDR = 2, SEND_DATA = 3, STOP = 4;
always @(posedge clk or posedge rst) begin
if (rst) begin
state <= IDLE;
sda_out <= 1;
sck <= 1;
end else begin
case (state)
IDLE:
sda_out <= 1;
if (!sda_in) begin
state <= START;
end
START:
sda_out <= 0;
sck <= 0;
state <= SEND_ADDR;
SEND_ADDR:
if (sda_in) begin
state <= STOP;
end else begin
sda_out <= addr[7];
addr <= addr << 1;
if (addr == 0) begin
state <= SEND_DATA;
end
end
SEND_DATA:
if (sda_in) begin
state <= STOP;
end else begin
sda_out <= data[7];
data <= data << 1;
if (data == 0) begin
state <= STOP;
end
end
STOP:
sda_out <= 0;
sck <= 1;
state <= IDLE;
endcase
end
end
endmodule
```
3. 编写BME280的数据读取模块,通过I2C接口读取传感器数据,并将其存储在适当的寄存器中。可以参考BME280的数据手册,确定需要读取的寄存器地址和读取方式。以下是一个简单的BME280数据读取模块的例子:
```verilog
module bme280 (
input rst, clk,
output [31:0] temp, humi, press,
output reg [7:0] status
);
localparam BME280_ADDR = 8'h76;
localparam CTRL_HUM_ADDR = 8'hf2;
localparam CTRL_MEAS_ADDR = 8'hf4;
localparam CONFIG_ADDR = 8'hf5;
localparam PRESS_MSB_ADDR = 8'hf7;
localparam PRESS_LSB_ADDR = 8'hf8;
localparam PRESS_XLSB_ADDR = 8'hf9;
localparam TEMP_MSB_ADDR = 8'hfa;
localparam TEMP_LSB_ADDR = 8'hfb;
localparam TEMP_XLSB_ADDR = 8'hfc;
localparam HUM_MSB_ADDR = 8'fd;
localparam HUM_LSB_ADDR = 8'he;
reg [7:0] ctrl_hum;
reg [7:0] ctrl_meas;
reg [7:0] config;
reg [23:0] adc_press;
reg [23:0] adc_temp;
reg [23:0] adc_humi;
reg [15:0] t1, t2, t3;
reg [15:0] p1, p2, p3, p4, p5, p6, p7, p8, p9;
reg [15:0] h1, h2, h3, h4, h5, h6;
reg [3:0] state;
localparam IDLE = 0, START = 1, READ_CTRL_HUM = 2, WRITE_CTRL_MEAS = 3, WRITE_CONFIG = 4,
READ_PRESS_MSB = 5, READ_PRESS_LSB = 6, READ_PRESS_XLSB = 7,
READ_TEMP_MSB = 8, READ_TEMP_LSB = 9, READ_TEMP_XLSB = 10,
READ_HUM_MSB = 11, READ_HUM_LSB = 12;
i2c_master i2c (
.rst(rst), .clk(clk),
.sda_in(sda_in), .sda_out(sda_out),
.sck(sck)
);
reg [7:0] addr;
reg [7:0] data;
wire sda_in;
wire sda_out;
wire sck;
assign temp = {adc_temp[19:4], 4'b0} * t1 + ((adc_temp[3:0] * t2) >> 11) -
((adc_temp[3:0] * adc_temp[3:0]) * t3) >> 20;
assign press = ((temp - p1) * p5) >> 15 + ((adc_press - p6) * p4) >> 15 +
p7 + ((temp - p1) * p6) >> 16 + ((temp - p1) * ((temp - p1) * p8) >> 20) + p9;
assign humi = temp - (((temp - h1) * (temp - h1)) * h6) >> 10 -
((temp - h1) * h5) >> 10 + h2;
always @(posedge clk or posedge rst) begin
if (rst) begin
state <= IDLE;
status <= 8'hff;
end else begin
case (state)
IDLE:
addr <= CTRL_HUM_ADDR;
data <= 8'h01;
state <= START;
START:
if (status[0]) begin
state <= READ_CTRL_HUM;
end else begin
state <= WRITE_CTRL_MEAS;
end
READ_CTRL_HUM:
if (status[1]) begin
state <= WRITE_CTRL_MEAS;
end else begin
addr <= CTRL_HUM_ADDR;
state <= START;
end
WRITE_CTRL_MEAS:
if (status[2]) begin
state <= WRITE_CONFIG;
end else begin
addr <= CTRL_MEAS_ADDR;
data <= 8'h5f;
state <= START;
end
WRITE_CONFIG:
if (status[3]) begin
state <= READ_PRESS_MSB;
end else begin
addr <= CONFIG_ADDR;
data <= 8'h00;
state <= START;
end
READ_PRESS_MSB:
if (status[4]) begin
state <= READ_PRESS_LSB;
end else begin
addr <= PRESS_MSB_ADDR;
state <= START;
end
READ_PRESS_LSB:
if (status[5]) begin
state <= READ_PRESS_XLSB;
end else begin
addr <= PRESS_LSB_ADDR;
state <= START;
end
READ_PRESS_XLSB:
if (status[6]) begin
state <= READ_TEMP_MSB;
end else begin
addr <= PRESS_XLSB_ADDR;
state <= START;
end
READ_TEMP_MSB:
if (status[7]) begin
state <= READ_TEMP_LSB;
end else begin
addr <= TEMP_MSB_ADDR;
state <= START;
end
READ_TEMP_LSB:
if (status[8]) begin
state <= READ_TEMP_XLSB;
end else begin
addr <= TEMP_LSB_ADDR;
state <= START;
end
READ_TEMP_XLSB:
if (status[9]) begin
state <= READ_HUM_MSB;
end else begin
addr <= TEMP_XLSB_ADDR;
state <= START;
end
READ_HUM_MSB:
if (status[10]) begin
state <= READ_HUM_LSB;
end else begin
addr <= HUM_MSB_ADDR;
state <= START;
end
READ_HUM_LSB:
if (status[11]) begin
state <= IDLE;
end else begin
addr <= HUM_LSB_ADDR;
state <= START;
end
endcase
end
end
always @(posedge clk or posedge rst) begin
if (rst) begin
ctrl_hum <= 0;
ctrl_meas <= 0;
config <= 0;
adc_press <= 0;
adc_temp <= 0;
adc_humi <= 0;
t1 <= 0;
t2 <= 0;
t3 <= 0;
p1 <= 0;
p2 <= 0;
p3 <= 0;
p4 <= 0;
p5 <= 0;
p6 <= 0;
p7 <= 0;
p8 <= 0;
p9 <= 0;
h1 <= 0;
h2 <= 0;
h3 <= 0;
h4 <= 0;
h5 <= 0;
h6 <= 0;
end else begin
case (state)
READ_CTRL_HUM:
ctrl_hum <= data;
status[0] <= 0;
READ_PRESS_MSB:
adc_press[23:16] <= data;
READ_PRESS_LSB:
adc_press[15:8] <= data;
READ_PRESS_XLSB:
adc_press[7:0] <= data;
READ_TEMP_MSB:
adc_temp[23:16] <= data;
READ_TEMP_LSB:
adc_temp[15:8] <= data;
READ_TEMP_XLSB:
adc_temp[7:0] <= data;
READ_HUM_MSB:
adc_humi[23:16] <= data;
READ_HUM_LSB:
adc_humi[15:8] <= data;
status[1] <= 0;
default:
status <= 12'hfff;
endcase
end
end
endmodule
```
4. 编写OLED显示模块,通过SPI接口将解析后的数据显示在屏幕上。可以参考Pmod OLED的数据手册,确定需要设置的寄存器地址和显示方式。以下是一个简单的OLED显示模块
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