【FireBeetle Board ESP32-E IoT 开发板试用体验】第二弹,点个OLED屏玩玩吧,带跑马灯哟

图片转数组

本帖最后由 cszzlsw 于 2021-8-29 18:34 编辑

继上次点灯贴之后,发现好多点灯贴,然后群里有同学就吐槽了说大家都是点灯贴,感觉没什么意义,今天我来点个OLED,不知道大家会不会认为也是在浪费时间
话不多说,进入正题吧!

一,建立工程
上次点灯用的是led例程,这次咱们进到i2c工程里,
~/esp/esp-idf/examples/peripherals/i2c/i2c_tools$

为什么用这个呢,因为这里面有i2c的代码示例,因为我要玩的OLED屏需要I2C来驱动,这也就跟各新手同学提示了,如果拿到一款芯片用某个功能不知道怎么使用的时候,去官方的例程里去找,然后看不懂的时候去看文档,最后就能搞出来了,建立工程后工程目录这样:

二,写代码
这一步其实大家都会,其实挺枯燥无味的,主要跟大家说一下玩oled或者其他屏的时候会遇到的两个问题:图片和字模,
首先图片需要转换成数组,这里推荐大家用这个网站:图片转数组,如果所示,最后把转出来的数组拷到我们的代码里去就行:

// width: 64, height: 64 //for black
const unsigned char picture_arr[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xfe, 0x00, 0x00, 0x00, 0x06, 0x00, 0x01, 0xff, 0xff, 0x80, 0x00, 0xf0, 0x1f, 0x80, 0x07, 0xff, 0xff, 0xc0, 0x01, 0xf8, 0x1f, 0x80, 0x0f, 0xff, 0xff, 0xf0, 0x01, 0xf8, 0x1f, 0x80, 0x3f, 0xff, 0xff, 0xfc, 0x03, 0xf8, 0x1f, 0xc0, 0xff, 0xff, 0xff, 0xff, 0x07, 0xf8, 0x1f, 0xf3, 0xff, 0xff, 0xff, 0xff, 0x9f, 0xf8, 0x0e, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x00, 0x70, 0x00, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0x70, 0x00, 0x00, 0x0f, 0x80, 0x00, 0x00, 0x03, 0x70, 0x00, 0x00, 0x0f, 0x80, 0x00, 0x00, 0x03, 0x70, 0x00, 0x00, 0x0f, 0x80, 0x00, 0x00, 0x03, 0x70, 0x00, 0x00, 0x0f, 0x80, 0x00, 0x00, 0x03, 0x70, 0x00, 0x00, 0x0f, 0xc0, 0x00, 0x00, 0x07, 0x70, 0x00, 0x00, 0x0e, 0xf8, 0x00, 0x00, 0x3f, 0x70, 0x00, 0x00, 0x0f, 0x9f, 0x80, 0x01, 0xf9, 0xf0, 0x00, 0x00, 0x0f, 0xf3, 0xf0, 0x0f, 0xcf, 0xf0, 0x00, 0x00, 0x0f, 0xfe, 0x7e, 0xfe, 0xff, 0xf0, 0x00, 0x00, 0x0f, 0xff, 0xcf, 0xf7, 0xff, 0xf0, 0x00, 0x00, 0x0f, 0xff, 0xfc, 0x3f, 0xff, 0xf0, 0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x01, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x3f, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x0f, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x07, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x01, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};

复制代码

第二样是取字模,用汉字取模程序,在这里贴上地址,大家自行下载:http://www.pc0359.cn/downinfo/110811.html

把字模软件生成的数组拷到代码里去:

unsigned char hope_arr[][32] = {
//当前汉字是:祝
{0x00, 0x00, 0x00, 0x00, 0x0C, 0x00, 0x06, 0x18, 0x01, 0xFC, 0x0D, 0x98, 0x7C, 0xB0, 0x2C, 0xF0,
0x1E, 0xF0, 0x1E, 0xE0, 0x3D, 0xA1, 0x6D, 0x23, 0x0E, 0x3F, 0x08, 0x1E, 0x08, 0x00, 0x00, 0x00},
/*---------------电----------------*/
{0x00, 0x00, 0x02, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0xF8, 0x3F, 0xB8, 0x1B, 0xB0, 0x1F, 0xF0,
0x1B, 0x30, 0x1F, 0xE0, 0x0F, 0x00, 0x03, 0x04, 0x03, 0x06, 0x01, 0xFE, 0x00, 0x78, 0x00, 0x00},
/*---------------子----------------*/
{0x00, 0x00, 0x00, 0x00, 0x01, 0xF0, 0x0F, 0x70, 0x00, 0x60, 0x01, 0xC0, 0x01, 0xFE, 0x3F, 0xFE,
0x78, 0xC0, 0x00, 0xC0, 0x00, 0xC0, 0x00, 0xC0, 0x00, 0xC0, 0x07, 0xC0, 0x03, 0x80, 0x01, 0x00},
/*---------------发----------------*/
{0x00, 0x00, 0x01, 0x80, 0x01, 0xF8, 0x05, 0x9C, 0x07, 0x90, 0x0D, 0xF8, 0x0F, 0x00, 0x0B, 0x60,
0x03, 0xF0, 0x07, 0x60, 0x06, 0xE0, 0x0C, 0xE0, 0x19, 0xF0, 0x33, 0xBC, 0x00, 0x1E, 0x00, 0x00},
/*---------------烧----------------*/
{0x00, 0x00, 0x00, 0x00, 0x09, 0x80, 0x0C, 0xF0, 0x0C, 0xF8, 0x0F, 0xF8, 0x6E, 0x74, 0x38, 0xFE,
0x09, 0x8E, 0x09, 0xF8, 0x0F, 0xE0, 0x1E, 0xA0, 0x11, 0xA2, 0x33, 0x3F, 0x46, 0x3E, 0x00, 0x00},
/*---------------友----------------*/
{0x00, 0x00, 0x01, 0x80, 0x01, 0x80, 0x01, 0x80, 0x03, 0xF8, 0x1F, 0x80, 0x03, 0x00, 0x03, 0xF0,
0x07, 0xB0, 0x07, 0x60, 0x0D, 0xE0, 0x18, 0xE0, 0x30, 0xF0, 0x63, 0xBC, 0x0E, 0x1F, 0x00, 0x00},

复制代码

然后就可以组织主程序了:

void app_main(void)
{
// esp_console_repl_t *repl = NULL;
// esp_console_repl_config_t repl_config = ESP_CONSOLE_REPL_CONFIG_DEFAULT();
TaskHandle_t xHandle = xTaskCreateStatic(
oledTaskEntry,
"oled_th",
OLED_TASK_STACK_SIZE,
NULL,
tskIDLE_PRIORITY,
xStack,
&xTaskBuffer);
printf("create task %pn", xHandle);
// vTaskSuspend(xHandle);
while (1)
{
HAL_Delay(1000);
}

复制代码

void oledTaskEntry(void *arg)
{
printf("oledTaskEntry-------------n");
HAL_Delay(100);
ssd1306_Init();
int text_area_width = 64;
int text_area_height = 64;
int text_per_line_num = text_area_height / font_width;
int mod = hope_num % text_per_line_num;
int text_line_num = hope_num / text_per_line_num;
if (mod)
{
text_line_num += 1;
}
printf("picture_arr size=%dn", sizeof(picture_arr));
int text_alredy_show = 0;
while (1)
{
ssd1306_Fill(Black);
ssd1306_SetCursor(0, 0);
int x = 0;
int y = 0;
printf("hope_num =%dn", hope_num);
// int start_num = text_alredy_show * text_per_line_num;
int showed_num = 0;
for (int i = text_alredy_show; i < hope_num; i++)
{
ssd1306_DrawRegion(x, y, font_height, font_width, hope_arr[i], sizeof(hope_arr[0]), 0);
x += font_width;
if (x >= text_area_width)
{
y += font_height;
x = 0;
}
showed_num++;
if (y >= text_area_height)
{
break;
}
}
ssd1306_DrawRegion(64, 0, 64, 64, picture_arr, sizeof(picture_arr), 0);
ssd1306_UpdateScreen();
HAL_Delay(OLED_INTERVAL_TIME_MS);
text_alredy_show++;
if (text_alredy_show >= hope_num - text_alredy_show)
{
text_alredy_show = 0;
HAL_Delay(OLED_INTERVAL_TIME_MS * 3);
}
}
}

复制代码

三,编译,下载,运行
其实这一步挺枯燥的,不打算写比较多的内容,这里再贴一下i2c的初始化以及数据发送的代码把:

#define I2C_MASTER_TX_BUF_DISABLE 0 /*!< I2C master doesn't need buffer */
#define I2C_MASTER_RX_BUF_DISABLE 0 /*!< I2C master doesn't need buffer */
#define WRITE_BIT I2C_MASTER_WRITE /*!< I2C master write */
#define READ_BIT I2C_MASTER_READ /*!< I2C master read */
#define ACK_CHECK_EN 0x1 /*!< I2C master will check ack from slave*/
#define ACK_CHECK_DIS 0x0 /*!< I2C master will not check ack from slave */
#define ACK_VAL 0x0 /*!< I2C ack value */
#define NACK_VAL 0x1 /*!< I2C nack value */
static gpio_num_t i2c_gpio_sda = 21;
static gpio_num_t i2c_gpio_scl = 22;
static uint32_t i2c_frequency = 400000;
static i2c_port_t i2c_port = I2C_NUM_0;
static esp_err_t i2c_master_driver_initialize(void)
{
i2c_driver_install(i2c_port, I2C_MODE_MASTER, I2C_MASTER_RX_BUF_DISABLE, I2C_MASTER_TX_BUF_DISABLE, 0);
i2c_config_t conf = {
.mode = I2C_MODE_MASTER,
.sda_io_num = i2c_gpio_sda,
.sda_pullup_en = GPIO_PULLUP_ENABLE,
.scl_io_num = i2c_gpio_scl,
.scl_pullup_en = GPIO_PULLUP_ENABLE,
.master.clk_speed = i2c_frequency,
// .clk_flags = 0, /*!< Optional, you can use I2C_SCLK_SRC_FLAG_* flags to choose i2c source clock here. */
};
return i2c_param_config(i2c_port, &conf);
}
static uint32_t ssd1306_SendData(uint8_t *data, size_t size)
{
// WifiIotI2cIdx id = SSD1306_I2C_IDX;
// WifiIotI2cData i2cData = {0};
// i2cData.sendBuf = data;
// i2cData.sendLen = size;
i2c_cmd_handle_t g_i2c_cmd = NULL;
if (g_i2c_cmd == NULL)
{
g_i2c_cmd = i2c_cmd_link_create();
}
esp_err_t ret = 0;
i2c_master_start(g_i2c_cmd);
ret = i2c_master_write_byte(g_i2c_cmd, SSD1306_I2C_ADDR | WRITE_BIT, ACK_CHECK_EN);
// printf("i2c_master_write_byte ret = %dn", ret);
ret = i2c_master_write(g_i2c_cmd, data, size, ACK_CHECK_EN);
// printf("i2c_master_write ret = %dn", ret);
ret = i2c_master_stop(g_i2c_cmd);
// printf("i2c_master_stop ret = %dn", ret);
ret = i2c_master_cmd_begin(i2c_port, g_i2c_cmd, 50 / portTICK_RATE_MS);
// printf("i2c_master_cmd_begin ret = %dn", ret);
i2c_cmd_link_delete(g_i2c_cmd);
return ret; //i2c_master_write(id, SSD1306_I2C_ADDR, &i2cData);
}