【母亲节DIY】+ 示波器画图祝妈妈们节日快乐！

只看该作者 · 2020-5-8 10:20

本帖最后由 sylar^z 于 2020-5-8 10:20 编辑

祝家里两位妈妈身体健康，开心快乐！祝全天下所有伟大的妈妈们节日快乐！

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首先，介绍下玩板过程中用到设备和软件

板卡：正点原子的F103板子。这个可以其他板卡替换，只要带2通道DAC输出即可。

示波器：需要带X-Y显示模式。

图片转像素点软件：在线工具WebPlotDigitizer。

像素点转数组软件：dataConv_forXY2Array。

图片素材

---------------------------------------------------------------------------------------------------------------------------------

图像数据生成

打开https://apps.automeris.io/wpd/网站，点击左上角的File -> Load Image载入路图片，选择Image模式。

载入图片成功后

在右边的Color 选色中点击蓝色色块再点Color Picker选择字体颜色。

然后选择设置采点的水平/垂直像素间距△X，△Y，这个可以设置采点的密度。最后点击Run，显示采点效果。

在图的左侧，点击View Data可以显示当前所采集的像素点的坐标值。

在数据窗口，将Sort by选为Nearest Neighbor,，Digits设为0，格式选为Fixed。点击Format生成数据。然后点击Download.CSV下载数据文件保存，该格式可以用EXCEL打开。这里我们直接下拷贝数据保存成TXT，便于后面使用转换工具转换。

图像数据转换

将上一步保存的图像数据与dataConv_forXY2Array软件放在同一目录下。运行dataConv_forXY2Array将自动生成与TXT文档同名的H文件。

工程建立

通过STM32CubeMX可快速配置工程，正确配置时钟后，本项目只需配置两路DAC输出即可。

添加代码

在初始化DAC后使能两个通道的DAC。

/**

* @brief DAC Initialization Function

* @param None

* @retval None

*/

static void MX_DAC_Init(void)

{

/* USER CODE BEGIN DAC_Init 0 */

/* USER CODE END DAC_Init 0 */

DAC_ChannelConfTypeDef sConfig = {0};

/* USER CODE BEGIN DAC_Init 1 */

/* USER CODE END DAC_Init 1 */

/** DAC Initialization

*/

hdac.Instance = DAC;

if (HAL_DAC_Init(&hdac) != HAL_OK)

{

Error_Handler();

}

/** DAC channel OUT1 config

*/

sConfig.DAC_Trigger = DAC_TRIGGER_NONE;

sConfig.DAC_OutputBuffer =DAC_OUTPUTBUFFER_ENABLE;

if (HAL_DAC_ConfigChannel(&hdac,&sConfig, DAC_CHANNEL_1) != HAL_OK)

{

Error_Handler();

}

/** DAC channel OUT2 config

*/

if (HAL_DAC_ConfigChannel(&hdac,&sConfig, DAC_CHANNEL_2) != HAL_OK)

{

Error_Handler();

}

/* USER CODE BEGIN DAC_Init 2 */

HAL_DAC_Start(&hdac, DAC_CHANNEL_1);

HAL_DAC_Start(&hdac, DAC_CHANNEL_2);

/* USER CODE END DAC_Init 2 */

}

主函数增加循环输出功能

/**

* @brief The application entry point.

* @retval int

*/

int main(void)

{

/* USER CODE BEGIN 1 */

/* USER CODE END 1 */

/* MCUConfiguration--------------------------------------------------------*/

/* Reset of all peripherals, Initializes theFlash interface and the Systick. */

HAL_Init();

/* USER CODE BEGIN Init */

/* USER CODE END Init */

/* Configure the system clock */

SystemClock_Config();

/* USER CODE BEGIN SysInit */

/* USER CODE END SysInit */

/* Initialize all configured peripherals */

MX_GPIO_Init();

MX_DAC_Init();

/* USER CODE BEGIN 2 */

/* USER CODE END 2 */

/* Infinite loop */

/* USER CODE BEGIN WHILE */

while (1)

{

/* USER CODE END WHILE */

/* USER CODE BEGIN 3 */

for(uint16_t i = 0; i < PIXEL_DATA_LEN;i++)

{

HAL_DAC_SetValue(&hdac,DAC_CHANNEL_1, DAC_ALIGN_8B_R, (pixel[0] - 165) * 3 / 4);

HAL_DAC_SetValue(&hdac,DAC_CHANNEL_2, DAC_ALIGN_8B_R, 255 - (pixel[1] - 100) * 10 / 11);

}

/* USER CODE END 3 */

}

由于示波器的X-Y显示分别率不高，所以DAC采用的是8位数据。输入数值根据图像像素规整到0-255范围内。

完成程序后将板子连接到开发板，开启示波器的X-Y模式。图片中的图案就可以显示在示波器上了。

生成的坐标数组

#define PIXEL_DATA_LEN 357

uint16_t pixel[PIXEL_DATA_LEN][2] = {

{170, 151},{177, 151},{180, 142},{191, 140},{192, 152},{199, 151},{206, 151},{213, 149},

{216, 147},{223, 148},{228, 146},{230, 151},{237, 150},{239, 143},{239, 135},{239, 127},

{237, 118},{230, 116},{223, 117},{216, 117},{209, 117},{202, 117},{195, 119},{188, 116},

{182, 120},{181, 130},{192, 127},{204, 128},{211, 126},{217, 130},{222, 137},{209, 137},

{212, 159},{205, 162},{209, 170},{215, 179},{216, 187},{209, 186},{202, 186},{195, 186},

{188, 186},{180, 185},{177, 175},{188, 174},{189, 162},{178, 163},{219, 165},{225, 174},

{223, 182},{230, 184},{236, 186},{238, 175},{238, 167},{238, 159},{249, 166},{250, 154},

{253, 149},{258, 150},{269, 155},{276, 155},{283, 154},{286, 151},{292, 154},{299, 156},

{306, 154},{314, 153},{321, 155},{325, 157},{328, 150},{335, 155},{342, 155},{351, 152},

{358, 152},{365, 152},{364, 145},{372, 147},{379, 152},{386, 152},{393, 152},{400, 152},

{407, 150},{414, 147},{421, 152},{426, 158},{427, 167},{437, 168},{441, 166},{444, 156},

{437, 156},{439, 147},{447, 146},{451, 137},{441, 136},{432, 131},{425, 131},{418, 133},

{416, 122},{411, 116},{404, 118},{403, 127},{398, 131},{391, 132},{384, 132},{376, 127},

{375, 138},{361, 132},{354, 132},{347, 131},{338, 129},{333, 130},{326, 130},{324, 135},

{319, 131},{311, 132},{305, 132},{298, 128},{291, 135},{286, 131},{279, 129},{272, 129},

{283, 140},{295, 147},{303, 145},{311, 141},{318, 144},{329, 140},{311, 124},{305, 121},

{311, 164},{314, 170},{320, 170},{326, 174},{331, 168},{338, 168},{333, 182},{340, 187},

{333, 194},{326, 191},{318, 187},{311, 189},{309, 198},{305, 202},{298, 201},{291, 199},

{289, 208},{296, 211},{296, 220},{286, 221},{280, 226},{279, 241},{286, 249},{295, 248},

{296, 245},{305, 244},{313, 247},{310, 254},{311, 262},{319, 260},{326, 260},{332, 260},

{339, 261},{347, 264},{355, 269},{362, 273},{370, 272},{371, 274},{376, 266},{382, 268},

{390, 264},{397, 262},{404, 260},{410, 263},{411, 272},{408, 279},{415, 280},{419, 273},

{422, 261},{430, 262},{437, 267},{444, 271},{450, 270},{444, 262},{438, 256},{429, 251},

{422, 245},{429, 240},{436, 240},{443, 240},{449, 240},{421, 235},{410, 232},{409, 241},

{402, 240},{395, 240},{392, 234},{388, 240},{380, 239},{382, 226},{383, 215},{390, 212},

{397, 213},{404, 210},{411, 208},{418, 204},{423, 198},{429, 194},{435, 186},{432, 182},

{437, 179},{427, 178},{413, 177},{413, 184},{408, 190},{401, 189},{394, 187},{382, 186},

{382, 178},{382, 170},{382, 162},{370, 158},{370, 166},{370, 174},{370, 182},{370, 190},

{370, 201},{369, 210},{376, 211},{381, 205},{382, 194},{361, 208},{354, 206},{354, 201},

{348, 203},{341, 198},{348, 195},{332, 211},{327, 209},{321, 216},{316, 220},{309, 220},

{304, 233},{309, 235},{297, 232},{322, 228},{322, 236},{331, 239},{334, 247},{327, 247},

{320, 246},{341, 247},{348, 248},{353, 247},{358, 256},{366, 262},{383, 258},{390, 254},

{397, 251},{404, 249},{408, 249},{412, 223},{418, 223},{394, 222},{416, 194},{413, 169},

{412, 160},{403, 140},{377, 116},{371, 117},{364, 118},{300, 169},{293, 169},{286, 168},

{278, 169},{271, 168},{282, 178},{289, 178},{286, 187},{280, 190},{276, 196},{268, 198},

{255, 185},{249, 180},{248, 190},{244, 197},{237, 198},{230, 196},{223, 196},{216, 195},

{249, 142},{250, 131},{249, 123},{244, 116},{301, 183},{301, 192},{332, 222},{340, 221},

{347, 220},{341, 230},{341, 238},{350, 234},{303, 259},{304, 266},{299, 271},{296, 271},

{292, 277},{289, 282},{291, 292},{286, 294},{288, 306},{289, 314},{292, 323},{295, 332},

{301, 339},{306, 347},{312, 353},{319, 362},{326, 368},{330, 373},{352, 378},{359, 375},

{367, 372},{374, 369},{381, 365},{388, 362},{395, 357},{402, 353},{409, 348},{416, 342},

{423, 337},{430, 330},{436, 324},{442, 316},{446, 309},{449, 301},{454, 298},{449, 291},

{455, 289},{453, 280},{448, 280},{401, 276},{295, 260},{289, 260},{288, 268},{446, 126},

{452, 119},{459, 113},{466, 109},{473, 107},{479, 105},{484, 113},{491, 112},{497, 112},

{502, 113},{477, 115},{470, 120},{463, 123},{456, 1}

};

像素点转数组软件：dataConv_forXY2Array

dataConv_forXY2Array.rar (11.92 KB)

内部包含转换软件、原始数据TXT和生成的H数据文件。

2万 · 2020-5-9 09:32

感谢分享，送您1000家园币~

只看该作者 · 2020-5-9 11:16

这个优秀了

只看该作者 · 2020-5-9 15:10

厉害

只看该作者 · 2020-5-11 23:56

厉害 +1

只看该作者 · 2020-5-12 11:23

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只看该作者 · 2020-5-12 11:53

厉害了

2万 · 2020-5-12 14:40

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只看该作者 · 2020-5-12 16:47

21ic小喇叭发表于 2020-5-12 14:40
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邮件已发送。感谢二姨家。

【母亲节DIY】+ 示波器画图祝妈妈们节日快乐！

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