{"id":272,"date":"2020-12-01T20:22:09","date_gmt":"2020-12-01T12:22:09","guid":{"rendered":"http:\/\/150.158.163.220\/?p=272"},"modified":"2022-12-19T20:23:10","modified_gmt":"2022-12-19T12:23:10","slug":"%e8%ae%b0%e8%b6%85%e5%a3%b0%e6%b3%a2%e6%a8%a1%e5%9d%97%e7%9a%84%e5%ad%a6%e4%b9%a0%e8%bf%87%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/zhewana.cn\/?p=272","title":{"rendered":"\u8bb0\u8d85\u58f0\u6ce2\u6a21\u5757\u7684\u5b66\u4e60\u8fc7\u7a0b"},"content":{"rendered":"

\u5173\u4e8eHC-SR04\u7684\u90a3\u4e9b\u4e8b\uff08\u60f3\u770bHC-SR04\u6559\u7a0b?\u8bf7\u540e\u7ffb\uff09<\/h2>\n

\u5f53\u65f6\u624b\u91cc\u62ff\u7684\u662fHC-SR04\u6a21\u5757\uff0c\u4e8e\u662f\u5c31\u53bb\u67e5\u4e86\u5b83\u7684\u8d44\u6599,\u901a\u8fc7CSDN\u4e0a\u7684\u4e00\u4e9b\u535a\u5ba2\u5f97\u77e5\u5b83\u7684\u5de5\u4f5c\u539f\u7406\u4e4b\u540e\uff0c\u6211\u4fbf\u5f00\u59cb\u81ea\u884c\u64cd\u4f5c\u4e86\u3002<\/p>\n

\u9519\u8bef\u793a\u8303<\/strong><\/p>\n

\u9996\u5148\uff0c\u6211\u6ee1\u6000\u4fe1\u5fc3\u7684\u6253\u5f00CubeMX,\u914d\u7f6e\u4e86Trig\u5f15\u811a\u4f5c\u4e3a\u8f93\u51fa\u5f15\u811a\uff08\u4e0b\u62c9\uff09\uff0cEcho\u5f15\u811a\u4f5c\u4e3a\u8f93\u5165\u5f15\u811a\uff08\u4e0b\u62c9\uff09\u3002<\/p>\n

\u63a5\u4e0b\u6765\uff0c\u6253\u5f00\u4e00\u4e2a\u5b9a\u65f6\u5668\uff0c\u7ea0\u7ed3\u4e86\u4e00\u756a\u540e\uff0c\u6211\u6253\u5f00\u4e86\u5b9a\u65f6\u5668\u4e2d\u65ad\uff0c\u522b\u9a82\u4e86\u522b\u9a82\u4e86\uff0c\u5728\u6539\u4e86\u5728\u6539\u4e86<\/del>\u5c06PSC\u8bbe\u7f6e\u4e3a83\uff0c\u5c06ARR\u8bbe\u7f6e\u4e3a0\uff0c\u4e8e\u662f\u7f8e\u6ecb\u6ecb\u7684\u5f97\u5230\u4e86\u4e00\u4e2a1us\u89e6\u53d1\u4e00\u6b21\u7684\u4e2d\u65ad\u7528\u4e8e\u8ba1\u65f6\u3002\u53ea\u8981\u5728\u4e2d\u65ad\u56de\u8c03\u51fd\u6570\u91cc\u9762\u6bcf\u6b21\u8ba9\u4e00\u4e2a\u8ba1\u65f6\u53d8\u91cf\u52a0\u4e00\uff0c\u5c31\u53ef\u4ee5\u505a\u5230\u8ba1\u65f6\u4e86\uff08gepi\uff09\u3002<\/p>\n

\u4ee5\u4e0b\u5185\u5bb9\u867d\u7136\u6574\u4f53\u662f\u9519\u8bef\u7684\uff0c\u4f46\u662f\u8fd8\u662f\u6709\u4e00\u70b9\u6709\u7528\u7684\u5730\u65b9\u7684<\/strong><\/p>\n

\u518d\u63a5\u4e0b\u6765\uff0c\u6211\u9700\u8981\u53d1\u51fa\u4e00\u4e2a\u8d85\u8fc710us\u7684\u4fe1\u53f7\u6765\u89e6\u53d1\u6a21\u5757\u5de5\u4f5c\uff0c\u4e8e\u662f\u5c31\u4ea7\u751f\u4e86\u4e00\u4e2a\u6709\u8da3\u7684\u95ee\u9898\uff1a\u5fae\u79d2\u7ea7\u5ef6\u65f6<\/strong>\u3002\u5728\u7f51\u4e0a\u627e\u4e86\u597d\u591a\u8d44\u6599\u90fd\u7531\u4e8e\u6211\u592a\u83dc\u770b\u4e0d\u61c2\u65e0\u679c\uff0c\u4e8e\u662f\u6211\u5f00\u59cb\u5411\u6211\u4eec\u4eb2\u7231\u7684\u5b66\u957f\u6c42\u52a9\uff0c\u4e86\u89e3\u5230\u6709\u4e00\u4e2a\u8ba1\u6570\u9891\u7387\u7b49\u4e8e\u5355\u7247\u673a\u4e3b\u9891\u7684\u5bc4\u5b58\u5668\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u8bfb\u53d6\u5176\u4e2d\u7684\u503c\u6765\u83b7\u5f97\u5fae\u79d2\u7ea7\u522b\u7684\u5ef6\u65f6\u3002<\/p>\n

\u4ee3\u7801\u5982\u4e0b\uff1a <\/p>\n

void Delay_us(int n)\n{ i\nnt a;\na=SysTick->VAL;\/\/\u8bfb\u53d6\u5bc4\u5b58\u5668\u7684\u5f53\u524d\u503c\nwhile(SysTick->VAL-a<84*n);\/\/\u7b49\u5f85n us\n}<\/code><\/pre>\n
\u597d\u4e86\u597d\u4e86\uff0c\u63a5\u4e0b\u6765\u5c31\u662f\u6572\u4e00\u6bb5\u7b80\u5355\u7684\u4e3b\u51fd\u6570\u4ee3\u7801\u4e4b\u540e\u4eab\u53d7\u80dc\u5229\u7684\u559c\u60a6\u4e86\u3002<\/p>\n
\u4eca\u5929\u5b66\u4f1a\u4e86\u8d85\u58f0\u6ce2\u6a21\u5757\uff0c\u771f\u662f\u5f00\u5fc3\u7684\u4e00\u5929\uff01<\/del><\/p>\n
\u5c41\u5566\uff01Debug\u4e00\u4e0b\u53d1\u73b0\u8ddd\u79bb\u7684\u503c\u6839\u672c\u4e0d\u4f1a\u52a8\u554a\uff01<\/p>\n
\u8be2\u95ee\u4e86\u5b66\u957f\uff0c\u5f97\u77e5\u662f\u5b9a\u65f6\u5668\u4e2d\u65ad\u7684\u9891\u7387\u592a\u5feb\uff0c\u8fd9\u8c01\u53d7\u5f97\u4e86\u554a<\/del>\u5efa\u8bae\u7528\u8f93\u5165\u6355\u83b7\u6765\u8ba1\u65f6\u3002<\/p>\n
\u4e8e\u662f\uff0c\u6211\u53c8\u56de\u53bb\u5351\u5fae\u7684\u770b\u4e86\u4e00\u904d\u53c2\u8003\u624b\u518c\uff0c\u52a0\u4e0a\u5b66\u957f\u7684\u6307\u5bfc\uff0c\u81ea\u5df1\u6709\u4e86\u4e00\u4e9b\u4f53\u4f1a\uff1a\u4e32\u53e3\u901a\u4fe1\u771f\u9999\uff01<\/strong><\/p>\n
\n
\u5173\u4e8eUS-100\u7684\u90a3\u4e9b\u4e8b<\/h2>\n
\u5176\u5b9e\u4f1a\u6709\u4ee5\u4e0a\u5947\u602a\u7684\u4f53\u4f1a\u8fd8\u662f\u56e0\u4e3a\u5b66\u957f\u6ee1\u8138\u5acc\u5f03<\/del>\u7ec6\u5fc3\u8ba4\u771f\u7684\u6307\u5bfc\uff1a\u5e72\u561b\u7528\u90a3\u79cd\u4e1c\u897f\uff0cUS-100\u5b83\u4e0d\u9999\u561b\uff1f  <\/p>\n
\u6362\u4e86US-100\u4e4b\u540e\u6211\u53d1\u73b0\uff0c\u4e32\u53e3\u6a21\u5f0f\u7684\u786e\u5f88\u9999<\/strong>\u3002  <\/p>\n
\u6a21\u5757\u62ff\u5230\u624b\uff0c\u9996\u5148\u662f\u4e07\u5e74\u4e0d\u53d8\u7684\u67e5\u8d44\u6599\u8fc7\u7a0b\u3002\uff08PS\uff1a\u8bf7\u6ce8\u610f\u89c2\u5bdf\u6a21\u5757\u7684\u5f15\u811a\u8fde\u7ebf\u90e8\u5206\u5185\u5bb9\uff0c\u4e00\u822c\u7684\u4e32\u53e3\u901a\u4fe1\u90fd\u662fTx\u8fde\u63a5Rx\uff0cRx\u8fde\u63a5Tx\uff0c\u800c\u8fd9\u4e2a\u6a21\u5757\u521a\u597d\u76f8\u53cd<\/strong>\u3002\uff09  <\/p>\n
\u4e86\u89e3\u4e86\u6a21\u5757\u7684\u4f7f\u7528\u65b9\u6cd5\u4e4b\u540e\uff0c\u6211\u4fbf\u5f00\u59cb\u64cd\u4f5c\uff08\u6885\u5f00\u4e8c\u5ea6\uff09\u4e86\uff1a  <\/p>\n
\u9996\u5148\uff0c\u6253\u5f00CubeMX\u8fdb\u884c\u5f15\u811a\u7684\u914d\u7f6e\uff0c\u6b64\u5904\u9700\u8981\u6253\u5f00\u4e00\u7ec4\u4e32\u53e3\u5e76\u4f7f\u80fd\u4e32\u53e3\u4e2d\u65ad\u4ee5\u786e\u4fdd\u6536\u53d1\u6570\u636e\u65f6\u4e0d\u4f1a\u88ab\u6253\u65ad\uff0c\u6211\u7528\u7684\u662fUSART1\u3002  <\/p>\n
\u5b9a\u4e49\u4e24\u4e2a\u53d8\u91cf\uff0c\u4e00\u4e2a\u7528\u6765\u53d1\u9001\u89e6\u53d1\u4fe1\u53f7\uff0c\u4e00\u4e2a\u7528\u6765\u63a5\u6536\u4e24\u4e2a\u5b57\u8282\u7684\u53cd\u9988\u4fe1\u606f\uff1a  <\/p>\n
uint8_t receive[2];\/\/\u5b58\u50a8\u63a5\u6536\u7684\u6570\u636e\ndouble dis;\/\/\u5b58\u50a8\u8ba1\u7b97\u5f97\u5230\u7684\u8ddd\u79bb\nchar buffer[256];\/\/\u663e\u793a\u53d8\u91cf\u6240\u9700\u8981\u7684\u7f13\u51b2\u53d8\u91cf\nuint8_t sign=0x55;\/\/\u89e6\u53d1\u4fe1\u53f7<\/code><\/pre>\n
\u5728\u6b63\u786e\u914d\u7f6e\u5c4f\u5e55\u4e4b\u540e\uff0c\u5728\u5faa\u73af\u8bed\u53e5\u524d\u540e\u6572\u4e0a\u4ee5\u4e0b\u4ee3\u7801\uff1a  <\/p>\n
\/* USER CODE BEGIN WHILE *\/\n    u8g2_Setup_ssd1306_128x64_noname_1(&u8g2, U8G2_R0, u8x8_byte_4wire_hw_spi,\n    u8x8_gpio_and_delay);\n    u8g2_InitDisplay(&u8g2);\n    u8g2_SetPowerSave(&u8g2, 0); \/\/u8g2\u5c4f\u5e55\u7684\u521d\u59cb\u5316\nwhile (1)\n{\n    HAL_UART_Transmit_IT(&huart1,&sign,1);\n    HAL_UART_Receive_IT(&huart1,receive,2);\n    u8g2_FirstPage(&u8g2);\n    do\n    {\n        u8g2_SetFont(&u8g2, u8g2_font_courR18_tf);\n        sprintf(buffer,"%.2lf",dis);\n        u8g2_DrawStr(&u8g2, 0, 15, buffer);\n        u8g2_DrawStr(&u8g2, 80, 31, "cm" );\n    } while (u8g2_NextPage(&u8g2));\n    HAL_Delay(10);\n    \/* USER CODE END WHILE *\/\n    \/* USER CODE BEGIN 3 *\/\n} \n\/* USER CODE END 3 *\/<\/code><\/pre>\n
\u6700\u540e\u5b9a\u4e49\u4e2d\u65ad\u56de\u8c03\u51fd\u6570\u5e76\u5728\u5176\u4e2d\u8ba1\u7b97\u8ddd\u79bb\uff1a  <\/p>\n
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)\n{\ndis=((double)receive[0]<<8+(double)receive[1])\/10;\n}<\/code><\/pre>\n
\u81f3\u6b64\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u5728\u6211\u4eec\u7684\u5c4f\u5e55\u4e0a\u9762\u663e\u793a\u6a21\u5757\u6d4b\u91cf\u7684\u8ddd\u79bb\u503c\u4e86\u3002
\n\u4ec0\u4e48\u4f60\u95eeHC-SR04\uff1f\u4f60\u5c31\u662f\u4e3a\u4e86\u5b83\u624d\u6765\u7684\uff1f\u6ca1\u95e8\uff01<\/del>
\n\u6211\u8fd9\u5c31\u53bb\u5b66\u8f93\u5165\u6355\u83b7.........  <\/p>\n
A FEW THOUSEND YEARS LATER........<\/strong><\/p>\n
\n
\u5173\u4e8eHC-SR04<\/h2>\n
\u7ecf\u8fc7\u4e0d\u65ad\u7684\u8bf7\u6559\u4e4b\u540e\uff0c\u6211\u7ec8\u4e8e\u5f04\u61c2\u4e86\u6211\u5fc3\u5fc3\u5ff5\u5ff5\u7684\u8f93\u5165\u6355\u83b7\u3002
\n\u662f\u8fd9\u6837\u7684\uff0c\u5728F4\u53c2\u8003\u624b\u518c\u91cc\u9762\u6709\u8fd9\u6837\u7684\u4e00\u4e2a\u56fe\uff1a  <\/p>\n
\"1620482530457.png\"<\/div><\/p>\n
\u8fd9\u5f20\u56fe\u5bf9\u4e8e\u6211\u4eec\u5f04\u61c2\u8f93\u5165\u6355\u83b7\u81f3\u5173\u91cd\u8981\uff0c\u5728\u5c1d\u8bd5\u671f\u95f4\u6211\u51fa\u73b0\u8fc7\u4e86\u8bb8\u591a\u7384\u5b66\u9519\u8bef<\/del>\u7531\u4e8e\u4e0d\u61c2\u539f\u7406\u800c\u51fa\u73b0\u7684\u9519\u8bef\uff0c\u4e0b\u9762\u4e00\u4e00\u4e0e\u5927\u5bb6\u5206\u4eab\u3002\uff08\u89c2\u524d\u63d0\u793a\uff1a\u4ee5\u4e0b\u9519\u8bef\u5747\u662f\u5728TIM\u5f15\u811a\u7684\u914d\u7f6e\u4e0a\u51fa\u73b0\u7684\uff0c\u6211\u4f7f\u7528\u7684\u662fTIM2\u3002\uff09  <\/p>\n
\u4e00\u5927\u6ce2\u9519\u8bef\u793a\u8303\u5982\u671f\u800c\u81f3<\/strong><\/p>\n
(\u5bf9\u4e8e\u5176\u4e2d\u539f\u7406\u4e0d\u611f\u5174\u8da3\u7684\u7ae5\u978b\u8bf7\u76f4\u63a5\u79fb\u6b65\u4e0b\u4e00\u90e8\u5206,\u4f1a\u63d0\u4f9b\u5b8c\u6574\u7684\u4ee3\u7801\u4f9b\u79fb\u690d)<\/strong><\/p>\n
\u9996\u5148\u5c4f\u5e55\u548cIO\u53e3\u7684\u914d\u7f6e\u5c31\u4e0d\u8d58\u8ff0\u4e86 \uff1a  <\/p>\n
\"1620482586012.png\"<\/div><\/p>\n
\u770b\u4e86\u53c2\u8003\u624b\u518c\u91cc\u9762\u5173\u4e8e\u8f93\u5165\u6355\u83b7\u7684\u4ecb\u7ecd\u4e4b\u540e\uff0c\u6211\u4fbf\u5f00\u59cb\u4e86\u64cd\u4f5c\uff1a<\/p>\n
\u6b64\u65f6\u5bf9\u4e8e\u8f93\u5165\u6355\u83b7\uff0c\u6211\u7684\u7406\u89e3\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n
\u9996\u5148\u6211\u770b\u5230\u4e86\u8fd9\u5f20\u56fe  <\/p>\n
\"1620482641174.png\"<\/div><\/p>\n
\u54e6\uff01\u68c0\u6d4b\u5230\u8df3\u53d8\u6cbf\u540eCCRx\u4f1a\u83b7\u53d6CNT\u5bc4\u5b58\u5668\u7684\u503c\u5e76\u4e14\u9501\u5b58<\/strong>\uff0c\u56e0\u6b64\u6211\u4eec\u53ea\u9700\u8981\u8bfb\u53d6CCRx\u7684\u503c\u5c31\u53ef\u4ee5\u5f97\u5230\u4eceCNT\u4e3a0<\/strong>\u4e00\u76f4\u5230\u8df3\u53d8\u6cbf\u53d1\u751f<\/strong>\u7ecf\u8fc7\u7684\u65f6\u95f4\uff0c\u90a3\u4e48\u95ee\u9898\u6765\u4e86\uff0cCNT\u4ec0\u4e48\u65f6\u5019\u4e3a\uff10\u5462\uff1f\u4e8e\u662f\u6211\u7ee7\u7eed\u770b\u5230\u4e86\u8fd9\u5f20\u56fe\uff1a<\/p>\n
\"1620482728662.png\"<\/div><\/p>\n
\u597d\u561b!\u8fd9\u4e0d\u662f\u5199\u7684\u660e\u660e\u767d\u767d\u7684\u561b!\u7b2c\u4e00\u4e2a\u4e0a\u5347\u6cbf\u65f6IC1\u548cIC2\u5171\u540c\u6355\u83b7,\u5e76\u4e14\u5c06\u8ba1\u6570\u5668(CNT\u5bc4\u5b58\u5668)\u590d\u4f4d\uff0c\u5230\u8fbe\u4e0b\u964d\u6cbf\u65f6IC2\u518d\u6b21\u6355\u83b7\uff0c\u5c06CNT\u7684\u503c\u9501\u5b58\u5230CCR2\u5bc4\u5b58\u5668\u91cc\u9762,\u4e0b\u6b21\u4e0a\u5347\u6cbf\u6765\u7684\u65f6\u5019\u91cd\u590d\u4ee5\u4e0a\u64cd\u4f5c.
\n\u88ab\u5feb\u4e50\u51b2\u660f\u4e86\u5934\u8111<\/del>\u6211\u914d\u7f6e\u4e86TIM\u5f15\u811a\u5982\u4e0b:  <\/p>\n
\"1620482766886.png\"<\/div><\/p>\n
\u751f\u6210\u4ee3\u7801\u540e\u5b8c\u6210\u4e00\u756a\u914d\u7f6e,\u63a5\u7740\u5728\u5faa\u73af\u524d\u540e\u6572\u4e0b\u5982\u4e0b\u4ee3\u7801:  <\/p>\n
    HAL_TIM_IC_Start(&htim2,TIM_CHANNEL_1);\/\/\u4f7f\u80fd\u8f93\u5165\u6355\u83b7\n    while (1)\n    {\n        Trig();\/\/\u53d1\u51fa\u89e6\u53d1\u4fe1\u53f7\n        HAL_Delay(100);\/\/\u5ef6\u65f6\u662f\u4e3a\u4e86\u7ed9\u6a21\u5757\u5b8c\u6210\u56de\u54cd\u4fe1\u53f7\u7684\u53d1\u9001\u7684\u65f6\u95f4\n        a=TIM2->CCR2;\/\/\u8bfb\u53d6CCR2\u7684\u503c\n        dis=a\/84000*17;\/\/\u6839\u636e\u58f0\u901f\u516c\u5f0f\u8fdb\u884c\u8ba1\u7b97(PS:CNT\u5bc4\u5b58\u5668\u8ba1\u65f6\u7684\u9891\u7387\u7b49\u4e8e\u603b\u7ebf\u9891\u7387\u7ecf\u8fc7\u9884\u5206\u9891\n        \u540e\u7684\u7ed3\u679c)\n        u8g2_FirstPage(&u8g2);\n        do\n        { \n            u8g2_SetFont(&u8g2, u8g2_font_courR18_tf);\n            sprintf(buffer,"%.2lf",dis);\n            u8g2_DrawStr(&u8g2, 0, 15, buffer); \n        } while (u8g2_NextPage(&u8g2));\n        \/* USER CODE END WHILE *\/\n        \/* USER CODE BEGIN 3 *\/\n    } \n    \/* USER CODE END 3 *\/<\/code><\/pre>\n
\u53d8\u91cf\u5b9a\u4e49:  <\/p>\n
char buffer[256];\nvoid Trig();\ndouble a,dis;<\/code><\/pre>\n
\u89e6\u53d1\u51fd\u6570Trig():  <\/p>\n
void Trig()\n{\n    HAL_GPIO_WritePin(GPIOA,GPIO_PIN_1,GPIO_PIN_SET);\n    int a;\n    a=SysTick->VAL;\n    while(SysTick->VAL-a<840);\/\/\u5ef6\u65f610us\n    HAL_GPIO_WritePin(GPIOA,GPIO_PIN_1,GPIO_PIN_RESET);\n}<\/code><\/pre>\n
(\u4ee5\u4e0a\u4ee3\u7801\u53ef\u4ee5\u653e\u5fc3\u79fb\u690d,\u56e0\u4e3a\u95ee\u9898\u4e0d\u51fa\u5728\u4ee3\u7801\u4e0a,\u4e0d\u8fc7\u540e\u9762\u4f1a\u6709\u70b9\u5c0f\u8c03\u6574.)
\n\u70e7\u5b8c\u4e86\u7a0b\u5e8f,\u7384\u5b66\u73b0\u8c61\u51fa\u73b0\u4e86:\u5c4f\u5e55\u4e0a\u7684\u6570\u5b57\u4e00\u76f4\u662f0.00.......
\n\u4f5c\u4e3a\u4e00\u4e2a\u83dc\u72d7  <\/p>\n
\"1620482979560.png\"<\/div><\/p>\n
\u6211\u60f3\u4e86\u597d\u4e45\u624d\u60f3\u5230\u662f\u600e\u4e48\u56de\u4e8b,\u6211\u770b\u5230\u4e86\u4e4b\u524d\u7684\u90a3\u5f20\u56fe:  <\/p>\n
\"1620482996852.png\"<\/div><\/p>\n
\u610f\u8bc6\u5230\u9891\u9053\u4e00\u7684\u503c\u4f3c\u4e4e\u5e94\u8be5\u7528CCR1\u554a,\u53c8\u6ce8\u610f\u5230PWM\u8f93\u5165\u65f6\u5e8f\u56fe\u4e0a\u9762\u5199\u7684\u662fPWM\u8f93\u5165\u4e0d\u662f\u8f93\u5165\u6355\u83b7\uff0c\u6211\u77ac\u95f4\u61c2\u4e86\uff0c\u770b\u6765\u6211\u60f3\u7684\u662f\u5bf9\u7684\uff0c\u5c31\u662f\u5e94\u8be5\u7528CCR1\u7684\u503c,\u4e8e\u662f\u5c31\u6539\u6210\u4e86\u8bfb\u53d6CCR1\u7684\u503c.\uff08\u4e00\u4e2a\u9519\u8bef\u7684\u7ed3\u8bba\uff09<\/strong>
\n\u518d\u6b21\u8fd0\u884c.........
\n\u5c4f\u5e55\u4e0a\u7684\u6570\u5b57\u4e0d\u518d\u662f0.00\u4e86\u6211\u5341\u5206\u5174\u594b,\u4eca\u5929\u641e\u61c2\u4e86HC-SR04 ,\u771f\u662f\u5f00\u5fc3\uff01<\/del>\u4e0d\u8fc7\u6211\u5f88\u5feb\u5c31\u610f\u8bc6\u5230\u4e86\u95ee\u9898:
\n\u6570\u5b57\u5728\u4e0d\u65ad\u7684\u4e0a\u6da8,\u6ca1\u6709\u4e00\u70b9\u505c\u6b62\u7684\u8ff9\u8c61.  <\/p>\n
\"1620483068136.png\"<\/div><\/p>\n
\u4e0d\u77e5\u6240\u63aa\u7684\u6211\u518d\u6b21\u5411\u624b\u518c\u6c42\u52a9,\u95ee\u9898\u8fd8\u662f\u51fa\u5728\u4e86\u8fd9\u5f20\u56fe\u4e0a\u9762\uff1a<\/p>\n
\"1620483088539.png\"<\/div><\/p>\n
\u6ce8\u610f\u5230\u4e86TI1FP1\u548cIC\uff11\u4ee5\u53caCCR1\u7684\u5173\u7cfb:  <\/p>\n
\"1620483101258.png\"<\/div><\/p>\n
\u6211\u610f\u8bc6\u5230\u81ea\u5df1\u6839\u672c\u6ca1\u6709\u8fdb\u884cTI1FP1\u7684\u914d\u7f6e,\u4e8e\u662f\u56de\u5230MX\u91cc\u9762\u8fdb\u884c\u914d\u7f6e\uff0c\u5f88\u5feb\u5c31\u53c8\u53d1\u73b0\uff1a  <\/p>\n
\"1620483115539.png\"<\/div><\/p>\n
\u8fd9\u5524\u8d77\u4e86\u6211\u7684\u8bb0\u5fc6,\u597d\u50cf\u662f\u8981\u914d\u7f6e\u4e00\u4e2aReset Mode\u6765\u7740?  <\/p>\n
\"1620483131833.png\"<\/div><\/p>\n
\u70b9\u4e0bReset Mode\u7684\u4e00\u77ac\u95f4,\u6211\u609f\u4e86,\u9a6c\u4e0a\u53bb\u624b\u518c\u91cc\u9762\u7ffb\u770b,\u679c\u7136\u53d1\u73b0\u4e86:  <\/p>\n
\"1620483146068.png\"<\/div><\/p>\n
\u590d\u4f4d\u6a21\u5f0f\u662f\u9700\u8981\u8fdb\u884c\u914d\u7f6e\u7684,\u800c\u8fd9\u4e2aReset Mode\u663e\u7136\u5c31\u662f\u5bf9\u6b64\u8fdb\u884c\u4e86\u914d\u7f6e,\u800c\u4e4b\u524d\u6570\u503c\u4e0d\u65ad\u4e0a\u5347\u7684\u73b0\u8c61\u663e\u7136\u662fCNT\u5bc4\u5b58\u5668\u6ca1\u6709\u91cd\u7f6e\u5bfc\u81f4\u7684.
\n\u597d\u561e!\u751f\u6210\u4ee3\u7801\u70e7\u7a0b\u5e8f\u6536\u5de5!<\/del>
\n\u8fd9\u6b21\u6570\u5b57\u679c\u7136\u6ca1\u6709\u4e00\u76f4\u589e\u52a0,\u7136\u800c\u5374\u4f1a\u4e00\u76f4\u4e71\u8df3,\u5373\u4f7f\u6211\u5b8c\u5168\u6ca1\u6709\u78b0\u6a21\u5757,\u4e5f\u4f1a\u4e00\u76f4\u4e71\u8df3.  <\/p>\n
\"1620483187822.png\"<\/div><\/p>\n
\u8f6c\u5ff5\u4e00\u60f3,PWM\u65f6\u5e8f\u56fe\u91cc\u9762\u6d4b\u91cf\u8109\u51b2\u957f\u5ea6\u7684\u662f\u5565\u6765\u7740?CCR2\u5427,\u53ef\u662f\u6211\u8bfbCCR2\u662f0,\u8bfb\u53d6CCR1\u53c8\u51fa\u73b0\u8fd9\u4e48\u5947\u602a\u7684\u8bfb\u6570,\u679c\u7136\u8fd8\u662f\u4e32\u53e3\u9999,HC-SR04\u7b97\u4e2a\u5c41,\u6559\u7a0b\u7ed3\u675f!\u95ee\u9898\u5e94\u8be5\u8fd8\u662f\u51fa\u5728\u90a3\u5f20\u6211\u770b\u4e0d\u61c2\u7684\u4e71\u4e03\u516b\u7cdf\u5173\u7cfb\u56fe\u4e0a,\u4e8e\u662f\u6211\u786c\u7740\u5934\u76ae\u5f00\u59cb\u786c\u770b,\u597d\u5728\u770b\u61c2\u4e86,\u4e0d\u7136\u5c31\u529d\u9000\u4e86.<\/p>\n
\u4ee5\u4e0b\u4e3a\u6b63\u786e\u5185\u5bb9<\/strong><\/p>\n
\u5176\u5b9e\u6211\u4eec\u53ea\u9700\u8981\u5173\u6ce8\u8fd9\u4e48\u4e00\u5c0f\u90e8\u5206\u5c31\u53ef\u4ee5:  <\/p>\n
\"1620483231142.png\"<\/div><\/p>\n
\u9996\u5148,\u6700\u4e0a\u9762\u4e00\u884c\u544a\u8bc9\u6211\u4eec\u4e86CNT\u8ba1\u6570\u5668\u7684\u9891\u7387\u662f\u4e3b\u9891\u7ecf\u8fc7PSC\u5206\u9891\u4e4b\u540e\u5f97\u5230\u7684\u9891\u7387\uff0c\u8fd9\u4e3a\u6211\u4eec\u8ba1\u7b97\u8109\u51b2\u5bbd\u5ea6\uff08\u65f6\u95f4\uff09\u63d0\u4f9b\u4e86\u65f6\u95f4\u57fa\u51c6\uff0e<\/p>\n
\u63a5\u4e0b\u6765\uff0c\u60f3\u60f3\u6211\u4eec\u4e4b\u524d\u8bf4\u7684\u8bdd:  <\/p>\n
\"1620483264848.png\"<\/div><\/p>\n
\u6355\u83b7\u8109\u51b2\u5bbd\u5ea6\u7684\u662fIC2\u800c\u4e0d\u662fIC1,\u6240\u4ee5\u7684\u786e\u662f\u5e94\u8be5\u8bfb\u53d6CCR2\u7684\u503c\u7684,\u53ef\u662f\u4e3a\u4ec0\u4e48\u4e4b\u524d\u7684\u5b9e\u9a8c\u5f97\u5230\u7684\u503c\u662f0\u5462?\u6211\u4eec\u518d\u6765\u770b\u56fe:  <\/p>\n
\"1620483287339.png\"<\/div><\/p>\n
\u663e\u7136IC2\u7684\u8f93\u5165\u5927\u90e8\u5206\u662f\u4eceCH2\u91cc\u9762\u8fc7\u6765\u7684,\u6211\u4eec\u7528\u7684\u662fCH1\u554a,\u6839\u672c\u5c31\u6ca1\u6709\u8f93\u5165\u600e\u4e48\u4f1a\u6709\u503c\u5462?\u53ef\u662f\u603b\u4e0d\u80fd\u518d\u5206\u4e00\u8def\u5230CH2\u53bb\u5427?<\/p>\n
\u522b\u614c,\u4ed4\u7ec6\u770b\u56fe\u5c31\u4f1a\u53d1\u73b0IC2\u7684\u8f93\u5165\u91cc\u9762\u6709\u4e00\u4e2a\u5367\u5e95<\/strong>,\u90a3\u5c31\u662fTI1FP2:  <\/p>\n
\"1620483332852.png\"<\/div><\/p>\n
\u53ef\u4ee5\u770b\u51fa\u5b83\u4e0d\u662f\u76f4\u63a5\u7531CH2\u8f93\u5165\u5230IC2\u7684,\u6362\u53e5\u8bdd\u8bf4\u5c31\u662f\u4eceCH1\u95f4\u63a5\u8f93\u5165\u5230CH2\u7684.<\/p>\n
\u597d\u7684,\u76f8\u4fe1\u5927\u5bb6\u90fd\u60f3\u5230\u4e86\u6211\u4eec\u4e4b\u524d\u8bb2\u7684CH2\u95f4\u63a5\u6a21\u5f0f(\u5176\u5b9e\u5927\u5bb6\u5e94\u8be5\u5f88\u65e9\u5c31\u60f3\u5230\u4e86,\u53ea\u6709\u6211\u8fd9\u6837\u7684\u83dc\u72d7\u624d\u4f1a\u8fd9\u4e48\u665a\u624d\u610f\u8bc6\u5230\u95ee\u9898\u6240\u5728orz):  <\/p>\n
\"1620483356038.png\"<\/div><\/p>\n
\u5230\u4e86\u8fd9\u91cc,\u6211\u4eec\u5df2\u7ecf\u79bb\u6210\u529f\u4e0d\u8fdc\u4e86,\u9700\u8981\u6ce8\u610f\u7684\u662f(\u522b\u95ee\u6211\u600e\u4e48\u6ce8\u610f\u5230\u7684):CH2\u6709\u4e00\u4e2a\u5355\u72ec\u7684\u8fb9\u6cbf\u8bbe\u7f6e\u9009\u9879,\u9ed8\u8ba4\u4e3a\u4e0a\u5347\u6cbf\u6355\u83b7,  <\/p>\n
\"1620483372851.png\"<\/div><\/p>\n
\u800c\u6211\u4eec\u5e0c\u671bIC2\u6355\u83b7\u4e0b\u964d\u6cbf,\u6240\u4ee5\u8bb0\u5f97\u66f4\u6539\u6355\u83b7\u8fb9\u6cbf\u4e3a\u4e0b\u964d\u6cbf.<\/p>\n
\u63a5\u4e0b\u6765\u6572\u4ee3\u7801,\u5b8c\u6210.  <\/p>\n
\n
\u4ec5\u4f9b\u53c2\u8003\u7684\u4f8b\u7a0b<\/h2>\n
1.\u5c4f\u5e55\u7684\u914d\u7f6e\u7565<\/p>\n
2.CubeMX\u914d\u7f6e:  <\/p>\n
\u6253\u5f00TIM2_CH1\u8fde\u63a5ECHO\u5f15\u811a\u4ee5\u4fbf\u6355\u83b7\u56de\u54cd\u4fe1\u53f7;
\n\u5c06A1\u8bbe\u7f6e\u4e3aGPIO\u8f93\u51fa\u6a21\u5f0f\u5e76\u4e0b\u62c9\uff0c\u7528\u4f5c\u89e6\u53d1\u5f15\u811a\uff0e  <\/p>\n
\"1620483454734.png\"<\/div><\/p>\n
\u5b9a\u65f6\u5668\u914d\u7f6e\u5982\u56fe\uff1a(\u7bad\u5934\u6307\u5411\u4e3a\u975e\u9ed8\u8ba4\u9009\u9879)  <\/p>\n
\"1620483468995.png\"<\/div><\/p>\n
3.\u4ee3\u7801\u5185\u5bb9:<\/p>\n
\u53d8\u91cf\u5b9a\u4e49\u548c\u51fd\u6570\u58f0\u660e:  <\/p>\n
char buffer[256];\nvoid Trig();\ndouble a,dis;<\/code><\/pre>\n
\u89e6\u53d1\u51fd\u6570Trig()\uff1a<\/p>\n
void Trig()\n{\n    HAL_GPIO_WritePin(GPIOA,GPIO_PIN_1,GPIO_PIN_SET);\n    int a;\n    a=SysTick->VAL;\n    while(SysTick->VAL-a<840);\/\/\u5ef6\u65f610us\n    HAL_GPIO_WritePin(GPIOA,GPIO_PIN_1,GPIO_PIN_RESET);\n}<\/code><\/pre>\n
\u4e3b\u51fd\u6570\u5faa\u73af\u524d\u540e:  <\/p>\n
HAL_TIM_IC_Start(&htim2,TIM_CHANNEL_1);\/\/\u4f7f\u80fd\u8f93\u5165\u6355\u83b7\n    while (1)\n    {\n        Trig();\/\/\u53d1\u51fa\u89e6\u53d1\u4fe1\u53f7\n        HAL_Delay(100);\/\/\u5ef6\u65f6\u662f\u4e3a\u4e86\u7ed9\u6a21\u5757\u5b8c\u6210\u56de\u54cd\u4fe1\u53f7\u7684\u53d1\u9001\u7684\u65f6\u95f4\n        a=TIM2->CCR2;\/\/\u8bfb\u53d6CCR2\u7684\u503c\n        dis=a\/84000*17;\/\/\u6839\u636e\u58f0\u901f\u516c\u5f0f\u8fdb\u884c\u8ba1\u7b97(PS:CNT\u5bc4\u5b58\u5668\u8ba1\u65f6\u7684\u9891\u7387\u7b49\u4e8e\u603b\u7ebf\u9891\u7387\u7ecf\u8fc7\u9884\u5206\u9891\u540e\u7684\u7ed3\u679c)\n        u8g2_FirstPage(&u8g2);\n        do\n        { \n            u8g2_SetFont(&u8g2, u8g2_font_courR18_tf);\n            sprintf(buffer,"%.2lf",dis);\n            u8g2_DrawStr(&u8g2, 0, 15, buffer);\n        } while (u8g2_NextPage(&u8g2));\n        \/* USER CODE END WHILE *\/\n        \/* USER CODE BEGIN 3 *\/\n    } \n    \/* USER CODE END 3 *\/<\/code><\/pre>\n
\n
\u7ed3\u675f\u8bed<\/h2>\n
\u8c28\u4ee5\u6b64\u6587\u8bb0\u5f55\u81ea\u5df1\u5b66\u4e60\u8d85\u58f0\u6ce2\u6a21\u5757\u7684\u66f2\u6298\u8fc7\u7a0b\uff0c\u5206\u4eab\u7ed9\u5927\u5bb6\u5e0c\u671b\u80fd\u7ed9\u6b63\u5728\u7814\u7a76\u8d85\u58f0\u6ce2\u6a21\u5757\u7684\u4eba\u4ee5\u5e2e\u52a9.<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5173\u4e8eHC-SR04\u7684\u90a3\u4e9b\u4e8b\uff08\u60f3\u770bHC-SR04\u6559\u7a0b?\u8bf7\u540e\u7ffb\uff09 \u5f53\u65f6\u624b\u91cc\u62ff\u7684\u662fHC-SR04\u6a21\u5757\uff0c\u4e8e\u662f\u5c31\u53bb\u67e5\u4e86\u5b83 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[18,19],"class_list":["post-272","post","type-post","status-publish","format-standard","hentry","category-embedded","tag-stm32","tag-19"],"_links":{"self":[{"href":"https:\/\/zhewana.cn\/index.php?rest_route=\/wp\/v2\/posts\/272","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zhewana.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zhewana.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zhewana.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zhewana.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=272"}],"version-history":[{"count":1,"href":"https:\/\/zhewana.cn\/index.php?rest_route=\/wp\/v2\/posts\/272\/revisions"}],"predecessor-version":[{"id":273,"href":"https:\/\/zhewana.cn\/index.php?rest_route=\/wp\/v2\/posts\/272\/revisions\/273"}],"wp:attachment":[{"href":"https:\/\/zhewana.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=272"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zhewana.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=272"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zhewana.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=272"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}