续写
时间: 2024-02-09 10:12:05 浏览: 16
```verilog
oled_write_cmd(0x20); // 设置内存地址模式
oled_write_cmd(0x00); // 水平寻址模式
oled_write_cmd(0xA0); // 设置段重定向
oled_write_cmd(0xC8); // 设置COM扫描方向
oled_write_cmd(0xDA); // 设置COM硬件引脚配置
oled_write_cmd(0x12);
oled_write_cmd(0x81); // 设置对比度
oled_write_cmd(0xCF); // 对比度为207
oled_write_cmd(0xD9); // 设置预充电周期
oled_write_cmd(0xF1);
oled_write_cmd(0xDB); // 设置VCOMH
oled_write_cmd(0x40);
oled_write_cmd(0xA4); // 全局显示开启
oled_write_cmd(0xA6); // 设置正常/反向显示
oled_write_cmd(0xAF); // 打开显示
endfunction
function void oled_write_cmd(input byte cmd);
oled_dc = 0;
i2c_start(oled_sck, oled_cs, oled_sda);
i2c_write_byte(oled_sck, oled_cs, oled_sda, 0x78);
i2c_write_byte(oled_sck, oled_cs, oled_sda, 0x00);
i2c_write_byte(oled_sck, oled_cs, oled_sda, cmd);
i2c_stop(oled_sck, oled_cs, oled_sda);
endfunction
function void oled_write_data(input byte data);
oled_dc = 1;
i2c_start(oled_sck, oled_cs, oled_sda);
i2c_write_byte(oled_sck, oled_cs, oled_sda, 0x78);
i2c_write_byte(oled_sck, oled_cs, oled_sda, 0x40);
i2c_write_byte(oled_sck, oled_cs, oled_sda, data);
i2c_stop(oled_sck, oled_cs, oled_sda);
endfunction
function void rtcc_write_byte(input byte data);
rtcc_sda = 1;
rtcc_sck = 0;
rtcc_cs = 0;
for (i = 0; i < 8; i = i + 1) begin
rtcc_sda = data[i];
rtcc_sck = 1;
rtcc_sck = 0;
end
rtcc_cs = 1;
endfunction
function byte rtcc_read_byte();
byte data = 0;
rtcc_sda = 1;
rtcc_sck = 0;
rtcc_cs = 0;
for (i = 0; i < 8; i = i + 1) begin
rtcc_sck = 1;
data[i] = rtcc_sda;
rtcc_sck = 0;
end
rtcc_cs = 1;
return data;
endfunction
// 状态机
always @(posedge clk) begin
if (rst) begin
wait_count <= 0;
state <= 0;
led_value <= 0;
bme280_sda <= 0;
rtcc_sda <= 0;
oled_sda <= 0;
end else begin
case (state)
0: begin // 初始化
wait_count <= 100000000;
state <= 1;
end
1: begin // 等待
wait_count <= wait_count - 1;
if (wait_count == 0) begin
state <= 2;
end
end
2: begin // 读取温湿度
bme280_sda <= 0;
bme280_cs <= 0;
i2c_start(bme280_sck, bme280_cs, bme280_sda);
i2c_write_byte(bme280_sck, bme280_cs, bme280_sda, 0xEC);
i2c_write_byte(bme280_sck, bme280_cs, bme280_sda, 0xF7);
i2c_stop(bme280_sck, bme280_cs, bme280_sda);
bme280_cs <= 1;
bme280_cs <= 0;
i2c_start(bme280_sck, bme280_cs, bme280_sda);
i2c_write_byte(bme280_sck, bme280_cs, bme280_sda, 0xED);
byte temp_lsb = i2c_read_byte(bme280_sck, bme280_cs, bme280_sda, 1);
byte temp_msb = i2c_read_byte(bme280_sck, bme280_cs, bme280_sda, 1);
byte temp_xlsb = i2c_read_byte(bme280_sck, bme280_cs, bme280_sda, 1);
byte hum_lsb = i2c_read_byte(bme280_sck, bme280_cs, bme280_sda, 1);
byte hum_msb = i2c_read_byte(bme280_sck, bme280_cs, bme280_sda, 0);
i2c_stop(bme280_sck, bme280_cs, bme280_sda);
bme280_cs <= 1;
int temp_raw = (temp_msb << 12) | (temp_lsb << 4) | (temp_xlsb >> 4);
int temp_comp = (temp_raw * 100 * 125 + 128 * 16) >> 16;
int hum_raw = (hum_msb << 8) | hum_lsb;
int hum_comp = (hum_raw * 100 * 125 + 128 * 16) >> 16;
oled_init();
oled_write_cmd(0x21); // 设置列地址
oled_write_cmd(0); // 列0
oled_write_cmd(127); // 列127
oled_write_cmd(0x22); // 设置页地址
oled_write_cmd(0); // 第0页
oled_write_cmd(7); // 第7页
for (i = 0; i < 128 * 8; i = i + 1) begin
oled_write_data(0);
end
oled_write_cmd(0x21); // 设置列地址
oled_write_cmd(0); // 列0
oled_write_cmd(63); // 列63
oled_write_cmd(0x22); // 设置页地址
oled_write_cmd(0); // 第0页
oled_write_cmd(7); // 第7页
oled_write_data(0);
oled_write_data(0);
oled_write_data(0);
oled_write_data(0);
oled_write_data(0);
oled_write_data(0);
oled_write_data(0);
oled_write_data(0);
oled_write_data(0);
oled_write_data(0);
oled_write_data(0);
oled_write_data(0);
oled_write_data(0);
oled_write_data(0);
oled_write_data(