{"id":362,"date":"2026-04-16T18:25:13","date_gmt":"2026-04-16T10:25:13","guid":{"rendered":"https:\/\/xuemeng.work\/?p=362"},"modified":"2026-04-16T20:26:22","modified_gmt":"2026-04-16T12:26:22","slug":"xm-power-kit-%e4%bf%a1%e5%8f%b7%e6%ba%90%e6%a8%a1%e5%9d%97-%e8%ae%b2%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/xuemeng.work\/index.php\/2026\/04\/16\/xm-power-kit-%e4%bf%a1%e5%8f%b7%e6%ba%90%e6%a8%a1%e5%9d%97-%e8%ae%b2%e8%a7%a3\/","title":{"rendered":"XM POWER KIT\u2014\u4fe1\u53f7\u6e90\u6a21\u5757 \u8bb2\u89e3"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u786c\u4ef6\u8bbe\u8ba1<\/h2>\n\n\n\n<p>\u4fe1\u53f7\u6e90\u7684\u786c\u4ef6\u8bbe\u8ba1\u7406\u5ff5\u5f88\u7b80\u5355\uff1a\u901a\u8fc7STM32\u7684\u4e24\u4e2aDAC\uff0c\u642d\u914dTLV2374\u6784\u6210\u7684\u5dee\u5206\u653e\u5927\u5668\uff0c\u5c31\u53ef\u4ee5\u5b9e\u73b0\u00b15V\u8303\u56f4\u5185\uff0c\u4efb\u610f\u504f\u7f6e\u3001\u4efb\u610f\u6ce2\u5f62\u7684\u751f\u6210\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized is-style-default\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/xuemeng.work\/wp-content\/uploads\/2026\/04\/F7A65C7E3FE83E6751286E8A6926C40C-1024x890.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"890\" data-original=\"https:\/\/xuemeng.work\/wp-content\/uploads\/2026\/04\/F7A65C7E3FE83E6751286E8A6926C40C-1024x890.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-363\" style=\"width:526px;height:auto\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>\u6211\u4eec\u7b80\u8981\u770b\u4e00\u4e0b\u786c\u4ef6\u8bbe\u8ba1\uff0c\u6807\u7b7eDAC\u662f\u4eceSTM32\u8f93\u51fa\u7684\u6ce2\u5f62\uff0c\u6bd4\u5982\u8bf4\u6b63\u5f26\u6ce2\u3001\u4e09\u89d2\u6ce2\u7b49\u7b49\uff1bDAC_OFFSET\u5219\u662f\u4e00\u4e2a\u76f4\u6d41\u7535\u538b\uff0c\u7528\u6765\u63a7\u5236\u6ce2\u5f62\u7684\u504f\u7f6e\u3002<\/p>\n\n\n\n<p>STM32\u7684DAC\uff0c\u5982\u679c\u8981\u8f68\u5230\u8f68\u8f93\u51fa\uff0c\u5c31\u4e0d\u80fd\u5f00\u542f\u5185\u90e8buffer\uff08\u5426\u5219\u8f93\u51fa\u53ea\u80fd\u52303.05V\u5de6\u53f3\uff09\uff0c\u56e0\u6b64DAC\u548cDAC_OFFSET\u4f1a\u5148\u7ecf\u8fc7U55.1\u548cU55.2\u6784\u6210\u7684\u7535\u538b\u8ddf\u968f\u5668\uff0c\u4ee5\u6b64\u63d0\u5347\u5e26\u8f7d\u80fd\u529b\uff0c\u907f\u514d\u5e72\u6270\u3002<\/p>\n\n\n\n<p>U55.4\u7684\u529f\u80fd\u5f88\u7b80\u5355\uff0c\u5c31\u662f\u4e00\u4e2a\u5dee\u5206\u653e\u5927\u5668\uff0c\u5b83\u7684\u4f5c\u7528\u5c31\u662f \u7528\u540c\u5411\u7aef\u7535\u538b &#8211; \u53cd\u5411\u7aef\u7535\u538b\uff0c\u5c06\u8fd9\u4e2a\u5dee\u503c\u653e\u59273\u500d\u518d\u8f93\u51fa\u3002\u7406\u8bba\u4e0a\uff0c\u6700\u5927\u53ef\u4ee5\u5b9e\u73b0\uff083.3 &#8211; 0\uff09*3 = 9.9V\u7684\u8f93\u51fa\uff0c\u4f46\u53d7\u9650\u4e8e\u8fd0\u653e\u7684\u00b15V\u7684\u7535\u6e90\uff0c\u5b9e\u9645\u7684\u8f93\u51fa\u8303\u56f4\u88ab\u5c40\u9650\u5728\u4e86\u00b15V\u3002\u6211\u4eec\u53ef\u4ee5\u5f88\u7b80\u5355\u7684\u5f97\u5230\u6700\u7ec8\u8f93\u51fa\u4e0eDAC\u3001DAC_OFFSET\u7535\u538b\u7684\u5173\u7cfb\uff1a<\/p>\n\n\n\n<div class=\"wp-block-math\"><math display=\"block\"><semantics><mrow><msub><mi>V<\/mi><mrow><mi>o<\/mi><mi>u<\/mi><mi>t<\/mi><\/mrow><\/msub><mo>=<\/mo><mo form=\"prefix\" stretchy=\"false\">(<\/mo><msub><mi>V<\/mi><mrow><mi>d<\/mi><mi>a<\/mi><mi>c<\/mi><\/mrow><\/msub><mo>\u2212<\/mo><msub><mi>V<\/mi><mrow><mi>o<\/mi><mi>f<\/mi><mi>f<\/mi><mi>s<\/mi><mi>e<\/mi><mi>t<\/mi><\/mrow><\/msub><mo form=\"postfix\" stretchy=\"false\">)<\/mo><mo>\u00d7<\/mo><mn>3<\/mn><\/mrow><annotation encoding=\"application\/x-tex\">V_{out} = (V_{dac} &#8211; V_{offset}) \\times 3<\/annotation><\/semantics><\/math><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u8f6f\u4ef6\u8bbe\u8ba1<\/h2>\n\n\n\n<p>\u8f6f\u4ef6\u5c42\u9762\u57fa\u4e8eSTM32 HAL\u5e93\u5f00\u53d1\uff0c\u6838\u5fc3\u601d\u8def\u662f<strong>\u201c\u5b9a\u65f6\u5668\u89e6\u53d1DAC DMA\u8f93\u51fa\u201d<\/strong>\uff1a\u901a\u8fc7\u5b9a\u65f6\u5668TRGO\u4fe1\u53f7\u89e6\u53d1DAC\u4ee5\u56fa\u5b9a\u9891\u7387\u8f93\u51fa\u9884\u8ba1\u7b97\u7684\u6ce2\u5f62\u6570\u636e\uff08\u5b58\u50a8\u5728DMA\u7f13\u51b2\u533a\uff09\uff0c\u540c\u65f6\u5229\u7528\u53ccDAC\u5206\u5de5\u5b9e\u73b0\u201c\u6ce2\u5f62\u8f93\u51fa\uff08DAC1\uff09+ \u504f\u7f6e\u8c03\u8282\uff08DAC2\uff09\u201d\uff0c\u6700\u7ec8\u901a\u8fc7\u786c\u4ef6\u5dee\u5206\u653e\u5927\u5b9e\u73b0\u00b15V\u6ce2\u5f62\u8f93\u51fa\u3002\u6574\u4f53\u67b6\u6784\u91c7\u7528\u201c\u901a\u7528\u521d\u59cb\u5316 + \u4e2a\u6027\u5316\u6ce2\u5f62\u751f\u6210\u201d\u7684\u8bbe\u8ba1\uff0c\u517c\u987e\u4ee3\u7801\u590d\u7528\u6027\u548c\u6269\u5c55\u6027\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.1 \u6838\u5fc3\u53c2\u6570\u5b9a\u4e49\uff08wave_generator.h\uff09<\/h3>\n\n\n\n<p>\u9996\u5148\u5728\u5934\u6587\u4ef6\u4e2d\u5b9a\u4e49\u4e86\u4fe1\u53f7\u53d1\u751f\u5668\u7684\u5173\u952e\u914d\u7f6e\u5b8f\uff0c\u8fd9\u4e9b\u53c2\u6570\u662f\u8f6f\u4ef6\u4e0e\u786c\u4ef6\u5339\u914d\u7684\u6838\u5fc3\uff0c\u4e5f\u662f\u6ce2\u5f62\u8ba1\u7b97\u7684\u57fa\u7840\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#define MAX_SAMPLE       256     \/\/ \u6700\u5927\u91c7\u6837\u70b9\u6570 (2^7)\uff0cRAM\u5360\u7528 256*2=512Bytes\n#define DAC_MAX          4095    \/\/ 12\u4f4dDAC\u6700\u5927\u503c (2^12 - 1)\n#define VREF             3.3f    \/\/ DAC\u53c2\u8003\u7535\u538b (V)\n#define MAX_AMPLITUDE    4.95f   \/\/ \u6700\u5927\u8f93\u51fa\u632f\u5e45 (V)\uff0c\u5339\u914d\u8fd0\u653e\u00b15V\u4f9b\u7535\n#define MIN_AMPLITUDE    0.0f    \/\/ \u6700\u5c0f\u8f93\u51fa\u632f\u5e45 (V)\n#define MAX_BIAS         4.95f   \/\/ \u6700\u5927\u8f93\u51fa\u504f\u7f6e (V)\n#define MIN_BIAS         (-4.95f)\/\/ \u6700\u5c0f\u8f93\u51fa\u504f\u7f6e (V)\n#define TRIG_MAX_FREQ    1000000 \/\/ DAC\u6700\u5927\u89e6\u53d1\u9891\u7387 (Hz)\n#define TIM_TRGO_HANDLE  htim7   \/\/ \u89e6\u53d1DAC\u7684\u5b9a\u65f6\u5668\u53e5\u67c4\uff08TIM7 TRGO\uff09\n#define TIM_FREQ         72000000.0f \/\/ \u5b9a\u65f6\u5668\u65f6\u949f\u9891\u7387 (Hz)<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>MAX_SAMPLE<\/code>\uff1a\u9650\u5b9aDMA\u7f13\u51b2\u533a\u6700\u5927\u957f\u5ea6\u4e3a256\u70b9\uff082\u7684\u5e42\u6b21\uff09\uff0c\u517c\u987e\u6ce2\u5f62\u7cbe\u5ea6\u548cRAM\u5360\u7528\uff1b<\/li>\n\n\n\n<li><code>DAC_MAX<\/code>\uff1a12\u4f4dDAC\u7684\u6ee1\u91cf\u7a0b\u7801\u503c\uff080~4095\uff09\uff0c\u5bf9\u5e94\u786c\u4ef63.3V\u53c2\u8003\u7535\u538b\uff1b<\/li>\n\n\n\n<li><code>TRIG_MAX_FREQ<\/code>\uff1a\u9650\u5236DAC\u89e6\u53d1\u9891\u7387\u4e0d\u8d85\u8fc71MHz\uff0c\u907f\u514d\u8d85\u51faSTM32 DAC\u7684\u786c\u4ef6\u6027\u80fd\uff1b<\/li>\n\n\n\n<li>\u632f\u5e45\/\u504f\u7f6e\u8303\u56f4\uff1a\u5339\u914d\u786c\u4ef6\u5dee\u5206\u653e\u5927\u540e\u7684\u00b15V\u8f93\u51fa\u8303\u56f4\uff0c\u8f6f\u4ef6\u5c42\u9762\u63d0\u524d\u505a\u8fb9\u754c\u9650\u5236\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2.2 \u901a\u7528\u521d\u59cb\u5316\u6a21\u5757\uff08WaveGen_CommonInit\uff09<\/h3>\n\n\n\n<p>\u6240\u6709\u6ce2\u5f62\u751f\u6210\u524d\u90fd\u9700\u8981\u6267\u884c\u901a\u7528\u521d\u59cb\u5316\uff0c\u8be5\u51fd\u6570\u5c01\u88c5\u4e86\u201c\u53c2\u6570\u6821\u9a8c\u2192\u91c7\u6837\u70b9\u6570\u8ba1\u7b97\u2192\u5b9a\u65f6\u5668\u914d\u7f6e\u2192\u504f\u7f6eDAC\u914d\u7f6e\u201d\u7684\u6838\u5fc3\u903b\u8f91\uff0c\u907f\u514d\u91cd\u590d\u4ee3\u7801\uff1a<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2.2.1 \u5165\u53c2\u5408\u6cd5\u6027\u68c0\u67e5<\/h4>\n\n\n\n<p>\u9996\u5148\u6821\u9a8c\u9891\u7387\uff081~50000Hz\uff09\u3001\u632f\u5e45\u3001\u504f\u7f6e\u662f\u5426\u5728\u5408\u6cd5\u8303\u56f4\uff0c\u975e\u6cd5\u5219\u76f4\u63a5\u8fd4\u56deHAL_ERROR\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>if (freq &lt;= 0 || freq &gt; 50000 ||\n    amplitude &lt; MIN_AMPLITUDE || amplitude &gt; MAX_AMPLITUDE ||\n    bias &lt; MIN_BIAS || bias &gt; MAX_BIAS) {\n    return HAL_ERROR;\n}<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">2.2.2 \u91c7\u6837\u70b9\u6570\uff08N\uff09\u8ba1\u7b97<\/h4>\n\n\n\n<p>\u91c7\u6837\u70b9\u6570N\u51b3\u5b9a\u6ce2\u5f62\u7684\u5206\u8fa8\u7387\uff0c\u9700\u6ee1\u8db3 <code>N \u00d7 freq \u2264 TRIG_MAX_FREQ<\/code>\uff08\u907f\u514d\u89e6\u53d1\u9891\u7387\u8d85\u9650\uff09\uff0c\u4e14N\u4e3a2\u7684\u5e42\u6b21\uff08\u4ece256\u5411\u4e0b\u67e5\u627e\uff09\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>for (int k = (int)log2(MAX_SAMPLE); k &gt;= 4; k--) { \/\/ k\u4ece7\uff08256\uff09\u52304\uff0816\uff09\n    uint16_t candidate = 1 &lt;&lt; k; \/\/ 2^k\n    if (candidate * freq &lt;= TRIG_MAX_FREQ) {\n        *N = candidate;\n        break;\n    }\n}<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">2.2.3 \u5b9a\u65f6\u5668\u53c2\u6570\u914d\u7f6e\uff08PSC\/ARR\uff09<\/h4>\n\n\n\n<p>\u5b9a\u65f6\u5668\u7528\u4e8e\u751f\u6210DAC\u7684\u89e6\u53d1\u4fe1\u53f7\uff0c\u6838\u5fc3\u662f\u8ba1\u7b97\u5206\u9891\u7cfb\u6570\uff08PSC\uff09\u548c\u91cd\u88c5\u8f7d\u503c\uff08ARR\uff09\uff0c\u6ee1\u8db3\uff1a<br><code>\u89e6\u53d1\u9891\u7387 = TIM_FREQ \/ [(PSC+1) \u00d7 (ARR+1)] = N \u00d7 freq<\/code><\/p>\n\n\n\n<p>\u4e3a\u9002\u914d16\u4f4d\u5b9a\u65f6\u5668\u7684\u5bc4\u5b58\u5668\u8303\u56f4\uff080~65535\uff09\uff0c\u901a\u8fc7<code>find_best_divisor<\/code>\u51fd\u6570\u5c06\u603b\u5206\u9891\u503cK\u5206\u89e3\u4e3a\u4e24\u4e2a\u226465535\u7684\u56e0\u5b50\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>uint32_t K = (uint32_t)roundf(TIM_FREQ \/ f_trig);\nif (K &lt;= 65536) {\n    PSC = 0;\n    ARR = (uint16_t)(K - 1);\n} else {\n    uint32_t a = find_best_divisor(K); \/\/ \u627e\u6700\u63a5\u8fd1\u5e73\u65b9\u6839\u7684\u56e0\u5b50\n    PSC = (uint16_t)(a - 1);\n    ARR = (uint16_t)((K \/ a) - 1);\n}\n\/\/ \u914d\u7f6e\u5e76\u590d\u4f4d\u5b9a\u65f6\u5668\nHAL_TIM_Base_Stop(&amp;TIM_TRGO_HANDLE);\nTIM_TRGO_HANDLE.Instance-&gt;PSC = PSC;\nTIM_TRGO_HANDLE.Instance-&gt;ARR = ARR;\nTIM_TRGO_HANDLE.Instance-&gt;CNT = 0;<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">2.2.4 \u504f\u7f6eDAC2\u914d\u7f6e<\/h4>\n\n\n\n<p>DAC2\u7528\u4e8e\u8f93\u51fa\u504f\u7f6e\u7535\u538bVoffset\uff0c\u7ed3\u5408\u786c\u4ef6\u653e\u5927\u500d\u6570\uff08DDS_Factor=3\uff09\u548c\u6821\u51c6\u503c\uff0c\u8ba1\u7b97\u5e76\u8bbe\u7f6eDAC2\u7684\u7801\u503c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u504f\u7f6e\u7535\u538b\u8f6cDAC\u7801\u503c\uff08\u5e26\u504f\u79fb\u6821\u51c6\uff09\nfloat dac2_val = 2047.5f - (bias * DAC_MAX) \/ (UserParam.DDS_Factor * VREF) - (float)UserParam.DDS_Original;\ndac2_val = (dac2_val &lt; 0) ? 0 : (dac2_val &gt; DAC_MAX) ? DAC_MAX : dac2_val;\nHAL_DAC_SetValue(&amp;hdac, DAC_CHANNEL_2, DAC_ALIGN_12B_R, (uint16_t)roundf(dac2_val));\nHAL_DAC_Start(&amp;hdac, DAC_CHANNEL_2);<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2.3 \u6ce2\u5f62\u751f\u6210\u6838\u5fc3\u903b\u8f91<\/h3>\n\n\n\n<p>\u6240\u6709\u6ce2\u5f62\u751f\u6210\u51fd\u6570\u9075\u5faa\u7edf\u4e00\u63a5\u53e3 <code>HAL_StatusTypeDef WaveGen_XXX(float freq, float amplitude, float bias, float duty_cycle)<\/code>\uff0c\u4ec5\u9700\u5728\u901a\u7528\u521d\u59cb\u5316\u540e\u586b\u5145DMA\u7f13\u51b2\u533a\uff0c\u518d\u542f\u52a8DAC DMA\u548c\u5b9a\u65f6\u5668\u5373\u53ef\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2.3.1 \u57fa\u7840\u6ce2\u5f62\u5b9e\u73b0<\/h4>\n\n\n\n<h5 class=\"wp-block-heading\">\uff081\uff09\u6b63\u5f26\u6ce2\uff08WaveGen_Sin\uff09<\/h5>\n\n\n\n<p>\u901a\u8fc7\u4e09\u89d2\u51fd\u6570\u8ba1\u7b97\u6bcf\u4e2a\u91c7\u6837\u70b9\u7684\u89d2\u5ea6\uff0c\u5c06\u6b63\u5f26\u503c\u6620\u5c04\u5230DAC\u7801\u503c\u8303\u56f4\uff08\u4e2d\u5fc3\u503c2047.5\uff0c\u5bf9\u5e941.65V\uff09\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>for (uint16_t i = 0; i &lt; N; i++) {\n    float theta = 2 * (float)M_PI * i \/ N; \/\/ 0~2\u03c0\u89d2\u5ea6\n    float val = 2047.5f + amp_code * sinf(theta); \/\/ \u6620\u5c04\u5230DAC\u7801\u503c\n    dac1_buffer&#91;i] = (uint16_t)roundf(val);\n    \/\/ \u8fb9\u754c\u9650\u5236\n    dac1_buffer&#91;i] = (dac1_buffer&#91;i] &gt; DAC_MAX) ? DAC_MAX : (dac1_buffer&#91;i] &lt; 0) ? 0 : dac1_buffer&#91;i];\n}<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\">\uff082\uff09\u65b9\u6ce2\uff08WaveGen_Square\uff09<\/h5>\n\n\n\n<p>\u901a\u8fc7\u5360\u7a7a\u6bd4\u5212\u5206\u9ad8\u4f4e\u7535\u5e73\u91c7\u6837\u70b9\uff0c\u5206\u522b\u8bbe\u7f6e\u56fa\u5b9aDAC\u7801\u503c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>uint16_t high_samples = (uint16_t)roundf(N * duty_cycle); \/\/ \u9ad8\u7535\u5e73\u70b9\u6570\nuint16_t high_level = (uint16_t)roundf(2047.5f + amp_code); \/\/ \u9ad8\u7535\u5e73\u7801\u503c\nuint16_t low_level = (uint16_t)roundf(2047.5f - amp_code);  \/\/ \u4f4e\u7535\u5e73\u7801\u503c\n\/\/ \u586b\u5145\u7f13\u51b2\u533a\nfor (uint16_t i = 0; i &lt; N; i++) {\n    dac1_buffer&#91;i] = (i &lt; high_samples) ? high_level : low_level;\n}<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\">\uff083\uff09\u952f\u9f7f\u6ce2\/\u4e09\u89d2\u6ce2\uff08WaveGen_Sawtooth\uff09<\/h5>\n\n\n\n<p>\u901a\u8fc7\u5360\u7a7a\u6bd4\u8bbe\u7f6e\u5347\u964d\u6cbf\u5206\u754c\u70b9\uff0c\u5206\u522b\u8ba1\u7b97\u7ebf\u6027\u4e0a\u5347\/\u4e0b\u964d\u7684DAC\u7801\u503c\uff08\u5360\u7a7a\u6bd40.5\u65f6\u4e3a\u4e09\u89d2\u6ce2\uff09\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>uint16_t breakpoint = (uint16_t)roundf(N * duty_cycle);\nfloat total_amp_span = 2 * amp_code; \/\/ \u603b\u7535\u538b\u8de8\u5ea6\nfor (uint16_t i = 0; i &lt; N; i++) {\n    float val;\n    if (i &lt; breakpoint) {\n        \/\/ \u4e0a\u5347\u6cbf\uff1a\u4ece2047.5-amp_code\u7ebf\u6027\u52302047.5+amp_code\n        val = 2047.5f - amp_code + ((float)i \/ (breakpoint - 1)) * total_amp_span;\n    } else {\n        \/\/ \u4e0b\u964d\u6cbf\uff1a\u4ece2047.5+amp_code\u7ebf\u6027\u52302047.5-amp_code\n        val = 2047.5f + amp_code - (((float)(i - breakpoint)) \/ (N - breakpoint - 1)) * total_amp_span;\n    }\n    dac1_buffer&#91;i] = (uint16_t)roundf(val);\n}<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">2.3.2 \u7279\u6b8a\u6ce2\u5f62\u5b9e\u73b0<\/h4>\n\n\n\n<h5 class=\"wp-block-heading\">\uff081\uff09\u566a\u58f0\uff08WaveGen_Noise\uff09<\/h5>\n\n\n\n<p>\u57fa\u4e8e\u7ebf\u6027\u540c\u4f59\u53d1\u751f\u5668\uff08LCG\uff09\u751f\u6210\u4f2a\u968f\u673a\u6570\uff0c\u6620\u5c04\u5230\u6307\u5b9a\u632f\u5e45\u8303\u56f4\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ LCG\u4f2a\u968f\u673a\u6570\u751f\u6210\n#define LCG_A 1664525\n#define LCG_C 1013904223\n#define LCG_M 0xFFFFFFFFU\nstatic float rand_float(void) {\n    lcg_seed = (LCG_A * lcg_seed + LCG_C) % LCG_M;\n    return (float)lcg_seed \/ (float)LCG_M;\n}\n\/\/ \u586b\u5145\u968f\u673a\u7801\u503c\nfloat noise_min = 2047.5f - amp_code;\nfloat noise_max = 2047.5f + amp_code;\nfor (uint16_t i = 0; i &lt; N; i++) {\n    float rand_val = rand_float();\n    float dac_val = noise_min + rand_val * (noise_max - noise_min);\n    dac1_buffer&#91;i] = (uint16_t)roundf(dac_val);\n}<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\">\uff082\uff09\u76f4\u6d41\u4fe1\u53f7\uff08WaveGen_DC\uff09<\/h5>\n\n\n\n<p>\u5ffd\u7565\u9891\u7387\/\u632f\u5e45\u53c2\u6570\uff0c\u5c06DMA\u7f13\u51b2\u533a\u586b\u5145\u4e3a\u56fa\u5b9a\u4e2d\u70b9\u7801\u503c\uff082048\uff0c\u5bf9\u5e941.65V\uff09\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>uint16_t dc_code = (uint16_t)roundf(2047.5f);\nfor (uint16_t i = 0; i &lt; N; i++) {\n    dac1_buffer&#91;i] = dc_code;\n}<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\">\uff083\uff09\u6307\u6570\u6ce2\u5f62\/\u6574\u6d41\u6ce2\u5f62\/Sinc\/Lorenz<\/h5>\n\n\n\n<p>\u8fd9\u7c7b\u6ce2\u5f62\u57fa\u4e8e\u7279\u5b9a\u6570\u5b66\u516c\u5f0f\u5b9e\u73b0\uff08\u5982\u6307\u6570\u4e0a\u5347<code>exp(t\/tau)<\/code>\u3001\u5168\u6ce2\u6574\u6d41<code>fabsf(sinf(theta))<\/code>\u3001Sinc\u51fd\u6570<code>sin(\u03c0x)\/(\u03c0x)<\/code>\uff09\uff0c\u6838\u5fc3\u903b\u8f91\u4ecd\u662f\u201c\u6570\u5b66\u516c\u5f0f\u8ba1\u7b97\u2192DAC\u7801\u503c\u6620\u5c04\u2192\u7f13\u51b2\u533a\u586b\u5145\u201d\uff0c\u4e0e\u57fa\u7840\u6ce2\u5f62\u4e00\u81f4\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.4 DMA\u4e0e\u5b9a\u65f6\u5668\u8054\u52a8<\/h3>\n\n\n\n<p>\u6240\u6709\u6ce2\u5f62\u6700\u7ec8\u901a\u8fc7DAC DMA\u8f93\u51fa\uff0c\u907f\u514dCPU\u6301\u7eed\u5e72\u9884\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u542f\u52a8DAC1 DMA\u8f93\u51fa\uff08\u7f13\u51b2\u533a\u3001\u70b9\u6570\u300112\u4f4d\u53f3\u5bf9\u9f50\uff09\nif (HAL_DAC_Start_DMA(&amp;hdac, DAC_CHANNEL_1, (uint32_t*)dac1_buffer, N, DAC_ALIGN_12B_R) != HAL_OK) \n    return HAL_ERROR;\n\/\/ \u542f\u52a8\u5b9a\u65f6\u5668\uff0c\u89e6\u53d1DAC\u8f93\u51fa\nif (HAL_TIM_Base_Start(&amp;TIM_TRGO_HANDLE) != HAL_OK) {\n    HAL_DAC_Stop_DMA(&amp;hdac, DAC_CHANNEL_1); \/\/ \u542f\u52a8\u5931\u8d25\u5219\u505c\u6b62DMA\n    return HAL_ERROR;\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DMA\uff1a\u5c06\u9884\u8ba1\u7b97\u7684\u6ce2\u5f62\u6570\u636e\u6279\u91cf\u4f20\u8f93\u5230DAC\u6570\u636e\u5bc4\u5b58\u5668\uff0c\u65e0\u9700CPU\u9010\u70b9\u5199\u5165\uff1b<\/li>\n\n\n\n<li>\u5b9a\u65f6\u5668TRGO\uff1aTIM7\u7684\u66f4\u65b0\u4e8b\u4ef6\u4f5c\u4e3a\u89e6\u53d1\u6e90\uff0c\u63a7\u5236DAC\u4ee5\u56fa\u5b9a\u9891\u7387\u8f93\u51fa\u6bcf\u4e2a\u91c7\u6837\u70b9\uff0c\u6700\u7ec8\u5b9e\u73b0\u8fde\u7eed\u6ce2\u5f62\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2.5 \u505c\u6b62\u4e0e\u8d44\u6e90\u91ca\u653e<\/h3>\n\n\n\n<p>\u63d0\u4f9b\u7edf\u4e00\u7684\u505c\u6b62\u51fd\u6570\uff0c\u91ca\u653e\u5b9a\u65f6\u5668\u3001DAC\u3001DMA\u8d44\u6e90\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>void WaveGen_Stop(void) {\n    HAL_TIM_Base_Stop(&amp;TIM_TRGO_HANDLE);    \/\/ \u505c\u6b62\u5b9a\u65f6\u5668\n    HAL_DAC_Stop_DMA(&amp;hdac, DAC_CHANNEL_1); \/\/ \u505c\u6b62DAC1 DMA\n    HAL_DAC_Stop(&amp;hdac, DAC_CHANNEL_1);     \/\/ \u505c\u6b62DAC1\n    HAL_DAC_Stop(&amp;hdac, DAC_CHANNEL_2);     \/\/ \u505c\u6b62DAC2\uff08\u504f\u7f6e\uff09\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2.6 \u63a5\u53e3\u8bbe\u8ba1\u4eae\u70b9<\/h3>\n\n\n\n<p>\u6240\u6709\u6ce2\u5f62\u51fd\u6570\u91c7\u7528<strong>\u7edf\u4e00\u53c2\u6570\u63a5\u53e3<\/strong>\uff1a<code>(freq, amplitude, bias, duty_cycle)<\/code>\uff0c\u5176\u4e2d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>freq<\/code>\uff1a\u6ce2\u5f62\u9891\u7387\uff08Hz\uff09\uff0c\u4ec5\u566a\u58f0\/\u76f4\u6d41\u4fe1\u53f7\u5ffd\u7565\uff1b<\/li>\n\n\n\n<li><code>amplitude<\/code>\uff1a\u632f\u5e45\uff08V\uff09\uff0c\u5bf9\u5e94\u786c\u4ef6\u653e\u5927\u540e\u7684\u8f93\u51fa\u5e45\u5ea6\uff1b<\/li>\n\n\n\n<li><code>bias<\/code>\uff1a\u76f4\u6d41\u504f\u7f6e\uff08V\uff09\uff0c\u901a\u8fc7DAC2\u5b9e\u73b0\uff1b<\/li>\n\n\n\n<li><code>duty_cycle<\/code>\uff1a\u5360\u7a7a\u6bd4\uff080~1\uff09\uff0c\u4ec5\u65b9\u6ce2\/\u952f\u9f7f\u6ce2\u751f\u6548\uff0c\u5176\u4ed6\u6ce2\u5f62\u4fdd\u7559\uff08\u4fbf\u4e8e\u51fd\u6570\u6307\u9488\u7edf\u4e00\u8c03\u7528\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u79cd\u8bbe\u8ba1\u8ba9\u4e0a\u5c42\u4ee3\u7801\u53ef\u901a\u8fc7\u51fd\u6570\u6307\u9488\u6570\u7ec4\u5feb\u901f\u5207\u6362\u6ce2\u5f62\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u6ce2\u5f62\u51fd\u6570\u6307\u9488\u7c7b\u578b\ntypedef HAL_StatusTypeDef (*WaveGen_Func)(float, float, float, float);\n\/\/ \u6ce2\u5f62\u51fd\u6570\u6570\u7ec4\nWaveGen_Func wave_funcs&#91;] = {\n    WaveGen_Sin, WaveGen_Square, WaveGen_Sawtooth, WaveGen_Noise\n};\n\/\/ \u8c03\u7528\u793a\u4f8b\uff1a\u751f\u62101kHz\u6b63\u5f26\u6ce2\uff0c2V\u632f\u5e45\uff0c0V\u504f\u7f6e\nwave_funcs&#91;0](1000.0f, 2.0f, 0.0f, 0.5f);<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u603b\u7ed3<\/h3>\n\n\n\n<p>\u8f6f\u4ef6\u8bbe\u8ba1\u7684\u6838\u5fc3\u662f<strong>\u201c\u786c\u4ef6\u53c2\u6570\u62bd\u8c61\u5316 + \u901a\u7528\u903b\u8f91\u590d\u7528 + \u4e2a\u6027\u5316\u6ce2\u5f62\u751f\u6210\u201d<\/strong>\uff1a\u901a\u8fc7\u901a\u7528\u521d\u59cb\u5316\u5c01\u88c5\u5b9a\u65f6\u5668\u3001DAC\u7684\u914d\u7f6e\u903b\u8f91\uff0c\u901a\u8fc7\u7edf\u4e00\u63a5\u53e3\u964d\u4f4e\u6ce2\u5f62\u5207\u6362\u6210\u672c\uff0c\u6700\u7ec8\u7ed3\u5408DMA\u548c\u5b9a\u65f6\u5668\u5b9e\u73b0\u201c\u65e0CPU\u5e72\u9884\u201d\u7684\u8fde\u7eed\u6ce2\u5f62\u8f93\u51fa\uff0c\u517c\u987e\u6027\u80fd\u548c\u6269\u5c55\u6027\u3002\u76ee\u524d\u5df2\u652f\u6301\u6b63\u5f26\u6ce2\u3001\u65b9\u6ce2\u3001\u952f\u9f7f\u6ce2\u3001\u566a\u58f0\u3001\u6307\u6570\u6ce2\u7b4913\u79cd\u6ce2\u5f62\uff0c\u4e14\u53ef\u901a\u8fc7\u7b80\u5355\u6269\u5c55\u516c\u5f0f\u5b9e\u73b0\u66f4\u591a\u81ea\u5b9a\u4e49\u6ce2\u5f62\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>\u5077\u61d2\u7528\u4e00\u4e0bAI\u603b\u7ed3\u8f6f\u4ef6\u90e8\u5206\uff0c\u6548\u679c\u8fd8\u4e0d\u9519\uff0c(\u25cf&#8217;\u25e1&#8217;\u25cf)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u786c\u4ef6\u8bbe\u8ba1 \u4fe1\u53f7\u6e90\u7684\u786c\u4ef6\u8bbe\u8ba1\u7406\u5ff5\u5f88\u7b80\u5355\uff1a\u901a\u8fc7STM32\u7684\u4e24\u4e2aDAC\uff0c\u642d\u914dTLV2374\u6784\u6210\u7684\u5dee\u5206\u653e\u5927\u5668\uff0c\u5c31\u53ef [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":380,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[26,27],"class_list":["post-362","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-xm-power-kit","tag-xm-power-kit","tag-27"],"_links":{"self":[{"href":"https:\/\/xuemeng.work\/index.php\/wp-json\/wp\/v2\/posts\/362","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xuemeng.work\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xuemeng.work\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xuemeng.work\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xuemeng.work\/index.php\/wp-json\/wp\/v2\/comments?post=362"}],"version-history":[{"count":7,"href":"https:\/\/xuemeng.work\/index.php\/wp-json\/wp\/v2\/posts\/362\/revisions"}],"predecessor-version":[{"id":370,"href":"https:\/\/xuemeng.work\/index.php\/wp-json\/wp\/v2\/posts\/362\/revisions\/370"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xuemeng.work\/index.php\/wp-json\/wp\/v2\/media\/380"}],"wp:attachment":[{"href":"https:\/\/xuemeng.work\/index.php\/wp-json\/wp\/v2\/media?parent=362"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xuemeng.work\/index.php\/wp-json\/wp\/v2\/categories?post=362"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xuemeng.work\/index.php\/wp-json\/wp\/v2\/tags?post=362"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}