\n CT117E-M4\u662f\u84dd\u6865\u676f\u5d4c\u5165\u5f0f\u7ec4\u7701\u8d5b\u6307\u5b9a\u7ade\u8d5b\u5e73\u53f0，\u5176\u6309\u952e\u7535\u8def\u8bbe\u8ba1\u4f53\u73b0\u4e86\u5178\u578b\u5de5\u4e1a\u7ea7\u4eba\u673a\u4ea4\u4e92\u63a5\u53e3\u7684\u5de5\u7a0b\u53d6\u820d\u3002\u8be5\u677f\u5361\u5de6\u4fa7\u5e03\u5c405\u4e2a\u7269\u7406\u6309\u952e，\u4f46\u529f\u80fd\u5b9a\u4f4d\u5b58\u5728\u672c\u8d28\u5dee\u5f02：\u5176\u4e2d4\u4e2a\u4e3a\u7528\u6237\u53ef\u7f16\u7a0b\u8f93\u5165\u6309\u952e（B1\u2013B4），1\u4e2a\u4e3a\u7cfb\u7edf\u590d\u4f4d\u4e13\u7528\u6309\u952e（RESET）\u3002\u8fd9\u79cd\u5206\u79bb\u5f0f\u8bbe\u8ba1\u5e76\u975e\u5197\u4f59，\u800c\u662f\u9075\u5faa\u5d4c\u5165\u5f0f\u7cfb\u7edf\u53ef\u9760\u6027\u8bbe\u8ba1\u539f\u5219\u2014\u2014\u5c06\u5173\u952e\u7cfb\u7edf\u63a7\u5236（\u590d\u4f4d）\u4e0e\u5e94\u7528\u903b\u8f91\u8f93\u5165（\u529f\u80fd\u952e）\u5728\u7535\u6c14\u548c\u8f6f\u4ef6\u5c42\u9762\u5b8c\u5168\u9694\u79bb，\u907f\u514d\u8bef\u64cd\u4f5c\u5f15\u53d1\u4e0d\u53ef\u63a7\u72b6\u6001\u3002\n<\/p>\n
\n \u590d\u4f4d\u6309\u952e\u76f4\u63a5\u8fde\u63a5\u81f3MCU\u7684PG10\u5f15\u811a，\u4f46\u5176\u7535\u6c14\u8fde\u63a5\u65b9\u5f0f\u5177\u6709\u660e\u786e\u7684\u7cfb\u7edf\u7ea7\u610f\u4e49\u3002\u901a\u8fc7\u77ed\u8def\u5e3d（Jumper）\u5c06PG10\u4e0e\u590d\u4f4d\u4fe1\u53f7\u94fe\u8def（\u6807\u6ce8\u4e3a\u201cT\u201d\u70b9）\u7269\u7406\u8fde\u901a，\u8be5\u8bbe\u8ba1\u5b9e\u73b0\u4e86\u786c\u4ef6\u590d\u4f4d\u8def\u5f84\u7684\u53ef\u914d\u7f6e\u6027\u3002\u5f53\u77ed\u8def\u5e3d\u95ed\u5408\u65f6，\u6309\u4e0b\u6309\u952e\u5373\u89e6\u53d1MCU\u786c\u4ef6\u590d\u4f4d；\u5f53\u77ed\u8def\u5e3d\u65ad\u5f00\u65f6，PG10\u6062\u590d\u4e3a\u666e\u901aGPIO\u529f\u80fd\u3002\u8fd9\u79cd\u8bbe\u8ba1\u5141\u8bb8\u5f00\u53d1\u8005\u5728\u8c03\u8bd5\u9636\u6bb5\u4e34\u65f6\u7981\u7528\u786c\u4ef6\u590d\u4f4d，\u9632\u6b62\u56e0\u8bef\u89e6\u5bfc\u81f4\u7a0b\u5e8f\u4e2d\u65ad，\u540c\u65f6\u4fdd\u7559\u751f\u4ea7\u73af\u5883\u4e0b\u7684\u5f3a\u5236\u590d\u4f4d\u80fd\u529b\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f，PG10\u5728STM32F103RCT6\u82af\u7247\u4e2d\u5c5e\u4e8eGPIOG\u7aef\u53e3\u7b2c10\u53f7\u5f15\u811a，\u5176\u590d\u4f4d\u529f\u80fd\u7531\u82af\u7247\u5185\u90e8BOOT\u5f15\u811a\u914d\u7f6e\u673a\u5236\u51b3\u5b9a，\u800c\u975e\u901a\u7528IO\u529f\u80fd\u3002\n<\/p>\n
\n B1\u2013B4\u56db\u4e2a\u7528\u6237\u6309\u952e\u91c7\u7528\u7edf\u4e00\u7684\u56db\u811a\u5c01\u88c5（\u5982ALPS SKQG\u7cfb\u5217），\u4f46\u4ec5\u4f7f\u75281\u30014\u53f7\u5f15\u811a\u6784\u6210\u5355\u5200\u5355\u63b7\u5f00\u5173\u3002\u8fd9\u79cd\u9009\u578b\u89c4\u907f\u4e86\u53cc\u5200\u53cc\u63b7\u5f00\u5173\u7684\u6210\u672c\u4e0e\u4f53\u79ef，\u540c\u65f6\u6ee1\u8db3\u57fa\u672c\u8f93\u5165\u9700\u6c42\u3002\u5173\u952e\u5728\u4e8e\u5176\u8fde\u63a5\u62d3\u6251：\u6bcf\u4e2a\u6309\u952e\u4e00\u7aef\u60ac\u7a7a，\u53e6\u4e00\u7aef\u8fde\u63a5\u5bf9\u5e94GPIO\u5f15\u811a（B1\u2192PB1, B2\u2192PB2, B3\u2192PB3, B4\u2192PB4），\u5e76\u5728GPIO\u5f15\u811a\u4e0eVDD\u4e4b\u95f4\u5916\u7f6e10k\u03a9\u4e0a\u62c9\u7535\u963b（\u539f\u7406\u56fe\u4e2d\u6807\u6ce8\u4e3aRxx）\u3002\u8be5\u8bbe\u8ba1\u5f62\u6210\u5178\u578b\u7684\u201c\u9ad8\u7535\u5e73\u6709\u6548\u201d\u8f93\u5165\u7ed3\u6784，\u5176\u7535\u6c14\u7279\u6027\u9700\u4ece\u4e24\u4e2a\u7a33\u6001\u8fdb\u884c\u5206\u6790：\n<\/p>\n
\u91ca\u653e\u6001（Key Released）<\/p>\n
：\u6309\u952e\u65ad\u5f00，GPIO\u5f15\u811a\u901a\u8fc7\u4e0a\u62c9\u7535\u963b\u4e0eVDD（3.3V）\u5efa\u7acb\u76f4\u6d41\u901a\u8def\u3002\u6b64\u65f6\u5f15\u811a\u7535\u538b\u88ab\u94b3\u4f4d\u5728VDD\u7535\u5e73，\u7ecfMCU\u8f93\u5165\u7f13\u51b2\u5668\u8bc6\u522b\u4e3a\u903b\u8f91\u9ad8\u7535\u5e73（1）\u3002\u8be5\u72b6\u6001\u5bf9\u5e94\u6309\u952e\u672a\u89e6\u53d1\u7684\u9ed8\u8ba4\u503c\u3002\n <\/li>\n
\u6309\u4e0b\u6001（Key Pressed）<\/p>\n
：\u6309\u952e\u95ed\u5408，GPIO\u5f15\u811a\u901a\u8fc7\u6309\u952e\u5185\u90e8\u89e6\u70b9\u4e0eGND\u5f62\u6210\u4f4e\u963b\u6297\u901a\u8def\u3002\u6b64\u65f6\u5f15\u811a\u7535\u538b\u88ab\u5f3a\u5236\u62c9\u4f4e\u81f3GND\u7535\u5e73（0V），\u8f93\u5165\u7f13\u51b2\u5668\u8bc6\u522b\u4e3a\u903b\u8f91\u4f4e\u7535\u5e73（0）\u3002\u8be5\u72b6\u6001\u5bf9\u5e94\u6309\u952e\u89e6\u53d1\u7684\u6709\u6548\u4e8b\u4ef6\u3002\n <\/li>\n<\/ul>\n
\n \u8fd9\u79cd\u201c\u91ca\u653e\u9ad8\u3001\u6309\u4e0b\u4f4e\u201d\u7684\u7535\u5e73\u903b\u8f91，\u672c\u8d28\u4e0a\u662f\u5229\u7528\u5916\u90e8\u4e0a\u62c9\u7535\u963b\u6784\u5efa\u786e\u5b9a\u6027\u7535\u5e73\u57fa\u51c6，\u907f\u514d\u6d6e\u7a7a\u5f15\u811a\u53d7\u7535\u78c1\u5e72\u6270\u5bfc\u81f4\u7684\u968f\u673a\u7ffb\u8f6c\u3002\n<\/p>\n
\n \u5728STM32 HAL\u5e93\u6846\u67b6\u4e0b，GPIO\u521d\u59cb\u5316\u9700\u660e\u786e\u6307\u5b9a<\/p>\n
GPIO_MODE<\/p>\n
\u53c2\u6570\u3002\u9488\u5bf9B1\u2013B4\u6309\u952e\u7684\u786c\u4ef6\u62d3\u6251，<\/p>\n
GPIO_MODE_INPUT<\/p>\n
（\u6d6e\u7a7a\u8f93\u5165）\u662f\u552f\u4e00\u7b26\u5408\u7535\u6c14\u7279\u6027\u7684\u914d\u7f6e\u9009\u9879\u3002\u6b64\u51b3\u7b56\u9700\u7ed3\u5408\u82af\u7247\u6570\u636e\u624b\u518c\u4e0e\u7535\u8def\u539f\u7406\u8fdb\u884c\u4e09\u91cd\u9a8c\u8bc1：\n<\/p>\n
\n \u6d6e\u7a7a\u8f93\u5165\u6a21\u5f0f（Floating Input）\u6307GPIO\u5f15\u811a\u5185\u90e8\u4e0a\u4e0b\u62c9\u7535\u963b\u5747\u5173\u95ed，\u5b8c\u5168\u4f9d\u8d56\u5916\u90e8\u7535\u8def\u63d0\u4f9b\u7535\u5e73\u57fa\u51c6\u3002\u5728\u672c\u8bbe\u8ba1\u4e2d，\u5916\u90e810k\u03a9\u4e0a\u62c9\u7535\u963b\u5df2\u4e3a\u5f15\u811a\u5efa\u7acb\u660e\u786e\u7684\u9ad8\u7535\u5e73\u53c2\u8003，\u800c\u6309\u952e\u95ed\u5408\u5219\u63d0\u4f9b\u53ef\u9760\u7684\u4f4e\u7535\u5e73\u901a\u8def\u3002\u82e5\u9519\u8bef\u914d\u7f6e\u4e3a<\/p>\n
GPIO_MODE_INPUT_PULLUP<\/p>\n
，\u5c06\u5bfc\u81f4\u5185\u90e8\u4e0a\u62c9\u7535\u963b（\u7ea640k\u03a9）\u4e0e\u5916\u90e810k\u03a9\u4e0a\u62c9\u7535\u963b\u5e76\u8054，\u867d\u4e0d\u7834\u574f\u529f\u80fd\u4f46\u589e\u52a0\u4e0d\u5fc5\u8981\u7684\u529f\u8017（\u7ea60.27mA\u989d\u5916\u7535\u6d41）；\u82e5\u914d\u7f6e\u4e3a<\/p>\n
GPIO_MODE_INPUT_PULLDOWN<\/p>\n
，\u5219\u5185\u90e8\u4e0b\u62c9\u7535\u963b（\u7ea650k\u03a9）\u4e0e\u5916\u90e8\u4e0a\u62c9\u7535\u963b\u5f62\u6210\u5206\u538b\u7f51\u7edc，\u4f7f\u91ca\u653e\u6001\u7535\u538b\u964d\u81f3\u7ea62.7V（\u8ba1\u7b97：3.3V \u00d7 50k\/(10k+50k)），\u867d\u4ecd\u9ad8\u4e8e\u903b\u8f91\u9ad8\u9608\u503c（0.7\u00d7VDD=2.31V），\u4f46\u566a\u58f0\u5bb9\u9650\u663e\u8457\u964d\u4f4e，\u6613\u53d7PCB\u8d70\u7ebf\u8026\u5408\u5e72\u6270\u5f71\u54cd\u3002\n<\/p>\n
\n B1\u2013B4\u5206\u522b\u6620\u5c04\u81f3GPIOB\u7aef\u53e3\u7684Pin1\u2013Pin4\u3002\u6839\u636eSTM32F103x\u7684APB2\u603b\u7ebf\u67b6\u6784，GPIOB\u65f6\u949f\u9700\u901a\u8fc7RCC_APB2ENR\u5bc4\u5b58\u5668\u4f7f\u80fd\u3002\u5728HAL\u5e93\u4e2d\u4f53\u73b0\u4e3a\u8c03\u7528<\/p>\n
__HAL_RCC_GPIOB_CLK_ENABLE()<\/p>\n
\u5b8f\u3002\u6b64\u5904\u9700\u7279\u522b\u6ce8\u610f\u65f6\u5e8f\u7ea6\u675f：\u5fc5\u987b\u5728\u8c03\u7528<\/p>\n
HAL_GPIO_Init()<\/p>\n
\u4e4b\u524d\u5b8c\u6210\u65f6\u949f\u4f7f\u80fd，\u5426\u5219\u521d\u59cb\u5316\u51fd\u6570\u5c06\u56e0\u65e0\u6cd5\u8bbf\u95ee\u5bc4\u5b58\u5668\u800c\u5931\u8d25\u3002\u5b9e\u9645\u5de5\u7a0b\u4e2d，\u8be5\u6b65\u9aa4\u901a\u5e38\u7f6e\u4e8e<\/p>\n
SystemClock_Config()<\/p>\n
\u4e4b\u540e\u3001<\/p>\n
MX_GPIO_Init()<\/p>\n
\u4e4b\u524d\u7684\u6807\u51c6\u521d\u59cb\u5316\u5e8f\u5217\u4e2d\u3002\n<\/p>\n
\n \u67e5\u9605STM32F103RCT6\u6570\u636e\u624b\u518c\u201cElectrical Characteristics\u201d\u7ae0\u8282，GPIO\u8f93\u5165\u9ad8\u7535\u5e73\u9608\u503c（VIH）\u6700\u5c0f\u503c\u4e3a0.7\u00d7VDD（2.31V），\u8f93\u5165\u4f4e\u7535\u5e73\u9608\u503c（VIL）\u6700\u5927\u503c\u4e3a0.3\u00d7VDD（0.99V）\u3002\u5916\u90e810k\u03a9\u4e0a\u62c9\u7535\u963b\u5728\u91ca\u653e\u6001\u4ea7\u751f\u7684\u7535\u538b\u4e3a3.3V，\u8fdc\u9ad8\u4e8eVIH；\u6309\u952e\u95ed\u5408\u65f6，\u5047\u8bbe\u6309\u952e\u63a5\u89e6\u7535\u963b\u4e3a100m\u03a9，\u5f15\u811a\u704c\u5165\u7535\u6d41\u4e3a3.3V\/10k\u03a9=0.33mA，\u8fdc\u4f4e\u4e8eGPIO\u6700\u5927\u8f93\u5165\u6f0f\u7535\u6d41（\u00b15\u03bcA），\u786e\u4fdd\u4f4e\u7535\u5e73\u7a33\u5b9a\u53ef\u9760\u3002\u8be5\u53c2\u6570\u7ec4\u5408\u9a8c\u8bc1\u4e86\u786c\u4ef6\u8bbe\u8ba1\u7684\u9c81\u68d2\u6027\u3002\n<\/p>\n
\n \u673a\u68b0\u6309\u952e\u5728\u89e6\u70b9\u95ed\u5408\/\u65ad\u5f00\u77ac\u95f4\u4f1a\u4ea7\u751f10\u201320ms\u7684\u5f39\u8df3\u73b0\u8c61，\u82e5\u76f4\u63a5\u8bfb\u53d6\u5c06\u5bfc\u81f4\u5355\u6b21\u6309\u952e\u88ab\u8bc6\u522b\u4e3a\u591a\u6b21\u89e6\u53d1\u3002CT117E-M4\u5e73\u53f0\u91c7\u7528\u201c\u786c\u4ef6\u9884\u5904\u7406+\u8f6f\u4ef6\u7cbe\u6ee4\u201d\u7684\u5206\u5c42\u6d88\u6296\u65b9\u6848，\u517c\u987e\u5b9e\u65f6\u6027\u4e0e\u8d44\u6e90\u6548\u7387\u3002\n<\/p>\n
\n \u90e8\u5206\u8bbe\u8ba1\u4f1a\u5728\u6309\u952e\u4e24\u7aef\u5e76\u80540.1\u03bcF\u9676\u74f7\u7535\u5bb9\u6784\u6210RC\u4f4e\u901a\u6ee4\u6ce2\u5668，\u65f6\u95f4\u5e38\u6570\u03c4=R\u00d7C=10k\u03a9\u00d70.1\u03bcF=1ms，\u7406\u8bba\u4e0a\u53ef\u6ee4\u9664\u9ad8\u9891\u566a\u58f0\u3002\u4f46\u5728\u672c\u5e73\u53f0\u4e2d\u672a\u91c7\u7528\u6b64\u65b9\u6848，\u539f\u56e0\u6709\u4e09：\u5176\u4e00，\u7ade\u8d5b\u677f\u5361\u5f3a\u8c03\u6210\u672c\u63a7\u5236，\u51cf\u5c11\u65e0\u6e90\u5668\u4ef6\u6570\u91cf；\u5176\u4e8c，STM32F103\u4e3b\u989172MHz，\u8f6f\u4ef6\u6d88\u6296\u5ef6\u8fdf\u53ef\u63a7；\u5176\u4e09，\u7535\u5bb9\u4f1a\u5ef6\u957f\u6309\u952e\u54cd\u5e94\u65f6\u95f4，\u5728\u9700\u8981\u5feb\u901f\u8fde\u7eed\u64cd\u4f5c\u7684\u573a\u666f（\u5982\u8ba1\u65f6\u5668\u52a0\u51cf）\u4e2d\u4ea7\u751f\u4f53\u9a8c\u52a3\u5316\u3002\u56e0\u6b64，\u786c\u4ef6\u5c42\u4ec5\u4fdd\u7559\u57fa\u7840\u7684\u4e0a\u62c9\u7535\u963b，\u5c06\u6d88\u6296\u4efb\u52a1\u4ea4\u7531\u8f6f\u4ef6\u5c42\u7075\u6d3b\u914d\u7f6e\u3002\n<\/p>\n
\n \u63a8\u8350\u91c7\u7528\u6709\u9650\u72b6\u6001\u673a（FSM）\u5b9e\u73b0\u6309\u952e\u626b\u63cf，\u76f8\u6bd4\u7b80\u5355\u5ef6\u65f6\u6cd5\u5177\u6709\u66f4\u9ad8\u53ef\u9760\u6027\u3002\u4ee5B1（PB1）\u4e3a\u4f8b，\u5b9a\u4e49\u4e09\u4e2a\u72b6\u6001：<\/p>\n
–<\/p>\n
KEY_IDLE<\/p>\n
：\u68c0\u6d4b\u5230\u4f4e\u7535\u5e73\u540e\u8fdb\u5165\u6b64\u72b6\u6001，\u542f\u52a815ms\u53bb\u6296\u5b9a\u65f6\u5668<\/p>\n
–<\/p>\n
KEY_CONFIRMED<\/p>\n
：\u5b9a\u65f6\u5668\u8d85\u65f6\u540e\u4ecd\u4e3a\u4f4e\u7535\u5e73，\u5219\u786e\u8ba4\u6709\u6548\u6309\u4e0b，\u6267\u884c\u4e1a\u52a1\u903b\u8f91<\/p>\n
–<\/p>\n
KEY_RELEASED<\/p>\n
：\u68c0\u6d4b\u5230\u9ad8\u7535\u5e73\u540e\u8fdb\u5165\u6b64\u72b6\u6001，\u542f\u52a815ms\u91ca\u653e\u786e\u8ba4\u5b9a\u65f6\u5668\n<\/p>\n
\n \u8be5\u72b6\u6001\u673a\u9700\u5728\u56fa\u5b9a\u5468\u671f（\u598210ms）\u7684SysTick\u4e2d\u65ad\u6216FreeRTOS\u4efb\u52a1\u4e2d\u8f6e\u8be2\u6267\u884c\u3002\u5173\u952e\u4ee3\u7801\u903b\u8f91\u5982\u4e0b：\n<\/p>\n
typedef enum {
\n KEY_IDLE,
\n KEY_CONFIRMED,
\n KEY_RELEASED
\n} KeyStateTypeDef;<\/p>\n
static KeyStateTypeDef b1_state = KEY_IDLE;
\nstatic uint8_t b1_press_flag = 0;<\/p>\n
void Key_Scan_B1(void) {
\n static uint16_t b1_debounce_cnt = 0;<\/p>\n
switch(b1_state) {
\n case KEY_IDLE:
\n if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_1) == GPIO_PIN_RESET) {
\n b1_debounce_cnt = 0;
\n b1_state = KEY_CONFIRMED;
\n }
\n break;<\/p>\n
case KEY_CONFIRMED:
\n if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_1) == GPIO_PIN_RESET) {
\n if(++b1_debounce_cnt >= 15) { \/\/ 15ms\u786e\u8ba4
\n b1_press_flag = 1;
\n b1_state = KEY_RELEASED;
\n b1_debounce_cnt = 0;
\n }
\n } else {
\n b1_state = KEY_IDLE; \/\/ \u5f39\u8df3\u6062\u590d，\u91cd\u65b0\u68c0\u6d4b
\n }
\n break;<\/p>\n
case KEY_RELEASED:
\n if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_1) == GPIO_PIN_SET) {
\n if(++b1_debounce_cnt >= 15) {
\n b1_state = KEY_IDLE;
\n b1_debounce_cnt = 0;
\n }
\n } else {
\n b1_state = KEY_CONFIRMED; \/\/ \u518d\u6b21\u6309\u4e0b，\u91cd\u7f6e\u91ca\u653e\u72b6\u6001
\n }
\n break;
\n }
\n}<\/p>\n
\n \u867d\u7136STM32\u652f\u6301GPIO\u5916\u90e8\u4e2d\u65ad（EXTI），\u4f46\u5bf9B1\u2013B4\u6309\u952e\u5e76\u4e0d\u63a8\u8350\u76f4\u63a5\u4f7f\u7528\u3002\u539f\u56e0\u5728\u4e8e：\u5176\u4e00，\u56db\u4e2a\u6309\u952e\u5171\u7528EXTI\u7ebf（PB1\u2013PB4\u6620\u5c04\u81f3EXTI1\u2013EXTI4），\u4f46\u4e2d\u65ad\u670d\u52a1\u51fd\u6570（ISR）\u65e0\u6cd5\u533a\u5206\u5177\u4f53\u89e6\u53d1\u5f15\u811a，\u9700\u5728ISR\u5185\u9010\u4e00\u67e5\u8be2，\u4e27\u5931\u4e2d\u65ad\u54cd\u5e94\u4f18\u52bf；\u5176\u4e8c，\u6309\u952e\u64cd\u4f5c\u9891\u7387\u4f4e（<10Hz），\u800c\u4e2d\u65ad\u5904\u7406\u5f00\u9500（\u5bc4\u5b58\u5668\u538b\u6808\/\u51fa\u6808\u3001\u4e0a\u4e0b\u6587\u5207\u6362）\u5728Cortex-M3\u4e0a\u7ea6\u970012\u201316\u4e2a\u5468\u671f，\u8fdc\u8d85\u8f6e\u8be2\u67e5\u8be2\u76842\u20133\u4e2a\u5468\u671f；\u5176\u4e09，\u9891\u7e41\u4e2d\u65ad\u53ef\u80fd\u5e72\u6270\u5176\u4ed6\u9ad8\u4f18\u5148\u7ea7\u4efb\u52a1（\u5982ADC\u91c7\u6837\u3001PWM\u8f93\u51fa）\u3002\u56e0\u6b64，\u4ec5\u5728\u9700\u8981\u8d85\u4f4e\u529f\u8017\u5f85\u673a（\u5982STOP\u6a21\u5f0f\u4e0b\u6309\u952e\u5524\u9192）\u573a\u666f\u624d\u542f\u7528EXTI，\u65e5\u5e38\u8fd0\u884c\u91c7\u7528\u8f6e\u8be2\u66f4\u7b26\u5408\u5de5\u7a0b\u5b9e\u8df5\u3002\n<\/p>\n
\n \u4e3a\u63d0\u5347\u4ee3\u7801\u590d\u7528\u6027\u4e0e\u53ef\u7ef4\u62a4\u6027，\u9700\u5c06\u6309\u952e\u529f\u80fd\u62bd\u8c61\u4e3a\u72ec\u7acb\u9a71\u52a8\u6a21\u5757\u3002CT117E-M4\u5e73\u53f0\u5efa\u8bae\u91c7\u7528\u4e09\u5c42\u67b6\u6784：\u786c\u4ef6\u62bd\u8c61\u5c42（HAL）\u3001\u9a71\u52a8\u5c42（Driver）\u3001\u5e94\u7528\u5c42（Application）\u3002\n<\/p>\n
\n \u5728<\/p>\n
key_hal.h<\/p>\n
\u4e2d\u5b9a\u4e49\u5e95\u5c42\u64cd\u4f5c\u63a5\u53e3，\u5c4f\u853d\u5177\u4f53MCU\u578b\u53f7\u5dee\u5f02：\n<\/p>\n
#ifndef __KEY_HAL_H
\n#define __KEY_HAL_H<\/p>\n
#include "stm32f1xx_hal.h"<\/p>\n
\/\/ \u6309\u952e\u679a\u4e3e，\u4e0e\u539f\u7406\u56fe\u6807\u6ce8\u4e25\u683c\u5bf9\u5e94
\ntypedef enum {
\n KEY_B1 = 0,
\n KEY_B2,
\n KEY_B3,
\n KEY_B4,
\n KEY_MAX
\n} KeyIndexTypeDef;<\/p>\n
\/\/ \u6309\u952e\u72b6\u6001\u679a\u4e3e
\ntypedef enum {
\n KEY_STATE_RELEASED = 0,
\n KEY_STATE_PRESSED
\n} KeyStateTypeDef;<\/p>\n
\/\/ \u521d\u59cb\u5316\u6240\u6709\u6309\u952eGPIO
\nvoid KEY_HAL_Init(void);<\/p>\n
\/\/ \u8bfb\u53d6\u6307\u5b9a\u6309\u952e\u5f53\u524d\u7535\u5e73（\u975e\u6d88\u6296）
\nKeyStateTypeDef KEY_HAL_ReadRaw(KeyIndexTypeDef key);<\/p>\n
#endif \/* __KEY_HAL_H *\/<\/p>\n
key_driver.c<\/p>\n
\u5b9e\u73b0\u6d88\u6296\u903b\u8f91\u4e0e\u72b6\u6001\u7f13\u5b58，\u5bf9\u5916\u63d0\u4f9b\u8fb9\u6cbf\u89e6\u53d1\u63a5\u53e3：\n<\/p>\n
#include "key_hal.h"
\n#include "key_driver.h"<\/p>\n
\/\/ \u6309\u952e\u72b6\u6001\u7f13\u5b58\u6570\u7ec4
\nstatic KeyStateTypeDef key_current_state[KEY_MAX] = {0};
\nstatic KeyStateTypeDef key_last_state[KEY_MAX] = {0};<\/p>\n
\/\/ \u6309\u952e\u6d88\u6296\u8ba1\u6570\u5668（\u5355\u4f4d：10ms）
\nstatic uint8_t key_debounce_cnt[KEY_MAX] = {0};<\/p>\n
\/\/ \u6309\u952e\u72b6\u6001\u66f4\u65b0（\u572810ms\u5b9a\u65f6\u5668\u56de\u8c03\u4e2d\u8c03\u7528）
\nvoid KEY_Driver_Update(void) {
\n for(uint8_t i = 0; i < KEY_MAX; i++) {
\n KeyStateTypeDef raw_state = KEY_HAL_ReadRaw((KeyIndexTypeDef)i);<\/p>\n
if(raw_state == key_last_state[i]) {
\n if(key_debounce_cnt[i] < 15) {
\n key_debounce_cnt[i]++;
\n }
\n } else {
\n key_debounce_cnt[i] = 0;
\n key_last_state[i] = raw_state;
\n }<\/p>\n
\/\/ \u7a33\u5b9a150ms\u540e\u66f4\u65b0\u5f53\u524d\u72b6\u6001
\n if(key_debounce_cnt[i] >= 15) {
\n key_current_state[i] = raw_state;
\n }
\n }
\n}<\/p>\n
\/\/ \u83b7\u53d6\u6309\u952e\u6309\u4e0b\u4e8b\u4ef6（\u4ec5\u5728\u72b6\u6001\u53d8\u5316\u65f6\u8fd4\u56de\u4e00\u6b21）
\nuint8_t KEY_Driver_GetPress(KeyIndexTypeDef key) {
\n static KeyStateTypeDef prev_state[KEY_MAX] = {0};
\n uint8_t ret = 0;<\/p>\n
if(key_current_state[key] == KEY_STATE_PRESSED &&
\n prev_state[key] == KEY_STATE_RELEASED) {
\n ret = 1;
\n }
\n prev_state[key] = key_current_state[key];<\/p>\n
return ret;
\n}<\/p>\n
\/\/ \u83b7\u53d6\u6309\u952e\u91ca\u653e\u4e8b\u4ef6
\nuint8_t KEY_Driver_GetRelease(KeyIndexTypeDef key) {
\n static KeyStateTypeDef prev_state[KEY_MAX] = {0};
\n uint8_t ret = 0;<\/p>\n
if(key_current_state[key] == KEY_STATE_RELEASED &&
\n prev_state[key] == KEY_STATE_PRESSED) {
\n ret = 1;
\n }
\n prev_state[key] = key_current_state[key];<\/p>\n
return ret;
\n}<\/p>\n
\n \u5728<\/p>\n
main.c<\/p>\n
\u7684\u4e3b\u5faa\u73af\u6216FreeRTOS\u4efb\u52a1\u4e2d，\u901a\u8fc7\u4e8b\u4ef6\u6807\u5fd7\u7ec4（Event Group）\u5b9e\u73b0\u6309\u952e\u4e8b\u4ef6\u89e3\u8026：\n<\/p>\n
#include "freertos\/FreeRTOS.h"
\n#include "freertos\/event_groups.h"<\/p>\n
\/\/ \u5b9a\u4e49\u6309\u952e\u4e8b\u4ef6\u6bd4\u7279\u4f4d
\n#define KEY_B1_PRESS_BIT (1 << 0)
\n#define KEY_B2_PRESS_BIT (1 << 1)
\n#define KEY_B3_PRESS_BIT (1 << 2)
\n#define KEY_B4_PRESS_BIT (1 << 3)<\/p>\n
EventGroupHandle_t key_event_group;<\/p>\n
void KEY_Task(void *pvParameters) {
\n EventBits_t uxBits;<\/p>\n
while(1) {
\n \/\/ \u6e05\u9664\u6240\u6709\u6309\u952e\u4e8b\u4ef6
\n xEventGroupClearBits(key_event_group,
\n KEY_B1_PRESS_BIT | KEY_B2_PRESS_BIT |
\n KEY_B3_PRESS_BIT | KEY_B4_PRESS_BIT);<\/p>\n
\/\/ \u626b\u63cf\u6309\u952e\u72b6\u6001
\n if(KEY_Driver_GetPress(KEY_B1)) {
\n xEventGroupSetBits(key_event_group, KEY_B1_PRESS_BIT);
\n }
\n if(KEY_Driver_GetPress(KEY_B2)) {
\n xEventGroupSetBits(key_event_group, KEY_B2_PRESS_BIT);
\n }
\n \/\/ … \u5176\u4ed6\u6309\u952e<\/p>\n
vTaskDelay(10); \/\/ 10ms\u626b\u63cf\u5468\u671f
\n }
\n}<\/p>\n
\/\/ \u5728\u4e1a\u52a1\u4efb\u52a1\u4e2d\u7b49\u5f85\u6309\u952e\u4e8b\u4ef6
\nvoid UserTask(void *pvParameters) {
\n EventBits_t uxBits;<\/p>\n
while(1) {
\n uxBits = xEventGroupWaitBits(
\n key_event_group,
\n KEY_B1_PRESS_BIT | KEY_B2_PRESS_BIT,
\n pdTRUE, \/\/ \u6e05\u9664\u5df2\u7b49\u5f85\u7684\u6bd4\u7279\u4f4d
\n pdFALSE, \/\/ \u4e0d\u8981\u6c42\u6240\u6709\u6bd4\u7279\u4f4d\u90fd\u7f6e\u4f4d
\n portMAX_DELAY
\n );<\/p>\n
if(uxBits & KEY_B1_PRESS_BIT) {
\n \/\/ \u6267\u884cB1\u529f\u80fd：\u5982LED\u5207\u6362
\n HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_0);
\n }
\n if(uxBits & KEY_B2_PRESS_BIT) {
\n \/\/ \u6267\u884cB2\u529f\u80fd：\u5982\u4e32\u53e3\u53d1\u9001
\n HAL_UART_Transmit(&huart1, (uint8_t*)"B2_PRESSED", 10, HAL_MAX_DELAY);
\n }
\n }
\n}<\/p>\n
\n \u5728CT117E-M4\u7684\u5b9e\u9645\u7ade\u8d5b\u8c03\u8bd5\u4e2d，\u6309\u952e\u76f8\u5173\u6545\u969c\u5360\u786c\u4ef6\u95ee\u9898\u768435%\u4ee5\u4e0a\u3002\u4ee5\u4e0b\u662f\u9ad8\u9891\u95ee\u9898\u7684\u6839\u56e0\u5206\u6790\u4e0e\u89e3\u51b3\u8def\u5f84：\n<\/p>\n
\n \u5f53B1\u2013B4\u5168\u90e8\u5931\u6548\u65f6，\u6309\u4ee5\u4e0b\u987a\u5e8f\u9a8c\u8bc1：<\/p>\n
1.<\/p>\n
\u7535\u6e90\u5b8c\u6574\u6027\u68c0\u67e5<\/p>\n
：\u4f7f\u7528\u4e07\u7528\u8868\u6d4b\u91cfVDD\u5f15\u811a\u5bf9GND\u7535\u538b，\u786e\u8ba4\u662f\u5426\u4e3a3.3V\u00b15%\u3002\u5e38\u89c1\u6545\u969c\u662fUSB\u4f9b\u7535\u4e0d\u8db3（\u4f4e\u4e8e4.75V）\u5bfc\u81f4LDO\u8f93\u51fa\u5f02\u5e38\u3002<\/p>\n
2.<\/p>\n
GPIO\u65f6\u949f\u9a8c\u8bc1<\/p>\n
：\u5728<\/p>\n
KEY_HAL_Init()<\/p>\n
\u4e2d\u6dfb\u52a0\u8c03\u8bd5LED\u95ea\u70c1，\u82e5LED\u4e0d\u4eae\u5219\u8bf4\u660eRCC\u914d\u7f6e\u9519\u8bef；\u82e5LED\u95ea\u70c1\u4f46\u6309\u952e\u65e0\u6548，\u5219\u68c0\u67e5<\/p>\n
__HAL_RCC_GPIOB_CLK_ENABLE()<\/p>\n
\u662f\u5426\u88ab\u6ce8\u91ca\u3002<\/p>\n
3.<\/p>\n
\u5f15\u811a\u590d\u7528\u51b2\u7a81<\/p>\n
：\u786e\u8ba4PB1\u2013PB4\u672a\u88ab\u5176\u4ed6\u5916\u8bbe（\u5982USART3_RX\u3001SPI3_NSS）\u590d\u7528\u3002\u5728STM32CubeMX\u4e2d\u68c0\u67e5Pinout\u89c6\u56fe，\u786e\u4fdd\u5bf9\u5e94\u5f15\u811aMode\u4e3a\u201dGPIO_Input\u201d\u3002<\/p>\n
4.<\/p>\n
\u710a\u63a5\u8d28\u91cf\u76ee\u68c0<\/p>\n
：\u653e\u5927\u955c\u89c2\u5bdfB1\u2013B4\u710a\u76d8\u662f\u5426\u5b58\u5728\u865a\u710a\u3001\u8fde\u9521\u3002\u7279\u522b\u5173\u6ce8\u6309\u952e\u5e95\u90e8\u91d1\u5c5e\u811a\u4e0ePCB\u710a\u76d8\u7684\u6da6\u6e7f\u60c5\u51b5，\u51b7\u710a\u70b9\u5448\u7070\u767d\u8272\u4e14\u65e0\u91d1\u5c5e\u5149\u6cfd\u3002\n<\/p>\n
\n \u5728\u5f3a\u7535\u78c1\u73af\u5883（\u5982\u9760\u8fd1\u7535\u673a\u9a71\u52a8\u5668）\u4e0b，\u6309\u952e\u53ef\u80fd\u51fa\u73b0\u968f\u673a\u89e6\u53d1\u3002\u6839\u672c\u539f\u56e0\u662fPCB\u8d70\u7ebf\u5145\u5f53\u63a5\u6536\u5929\u7ebf，\u9ad8\u9891\u566a\u58f0\u8026\u5408\u81f3GPIO\u5f15\u811a\u3002\u89e3\u51b3\u65b9\u6848\u5305\u62ec：<\/p>\n
–<\/p>\n
\u8d70\u7ebf\u4f18\u5316<\/p>\n
：\u6309\u952e\u4fe1\u53f7\u7ebf\u957f\u5ea6\u63a7\u5236\u572815mm\u4ee5\u5185，\u8fdc\u79bbDC-DC\u7535\u6e90\u6a21\u5757\u4e0e\u7535\u673a\u9a71\u52a8\u8f93\u51fa\u7aef<\/p>\n
–<\/p>\n
\u6ee4\u6ce2\u589e\u5f3a<\/p>\n
：\u5728GPIO\u5f15\u811a\u5c31\u8fd1（<2mm）\u589e\u52a0100pF\u9676\u74f7\u7535\u5bb9\u81f3GND，\u5f62\u6210\u03c0\u578b\u6ee4\u6ce2（\u539f\u4e0a\u62c9\u7535\u963b+\u65b0\u589e\u7535\u5bb9）<\/p>\n
–<\/p>\n
\u8f6f\u4ef6\u52a0\u56fa<\/p>\n
：\u5c06\u6d88\u6296\u65f6\u95f4\u4ece15ms\u63d0\u5347\u81f325ms，\u5e76\u5728<\/p>\n
KEY_Driver_Update()<\/p>\n
\u4e2d\u589e\u52a0\u566a\u58f0\u8ba1\u6570\u5668，\u8fde\u7eed3\u6b21\u68c0\u6d4b\u5230\u5f02\u5e38\u7535\u5e73\u53d8\u5316\u5219\u9501\u5b9a\u8be5\u6309\u952e100ms\n<\/p>\n
\n \u5f53\u7cfb\u7edf\u8fdb\u5165STOP\u6a21\u5f0f\u65f6，\u82e5\u6309\u952e\u65e0\u6cd5\u5524\u9192MCU，\u9700\u6838\u67e5：<\/p>\n
–<\/p>\n
\u65f6\u949f\u6e90\u9009\u62e9<\/p>\n
：STOP\u6a21\u5f0f\u4e0bHSI\u5fc5\u987b\u5173\u95ed，\u5524\u9192\u65f6\u949f\u9700\u914d\u7f6e\u4e3aLSI（40kHz）\u6216\u5916\u90e8LSE\u3002\u5728<\/p>\n
HAL_PWR_EnterSTOPMode()<\/p>\n
\u524d\u8c03\u7528<\/p>\n
__HAL_RCC_LSI_ENABLE()<\/p>\n
\u5e76\u7b49\u5f85\u5c31\u7eea<\/p>\n
–<\/p>\n
EXTI\u914d\u7f6e<\/p>\n
：\u82e5\u4f7f\u7528\u4e2d\u65ad\u5524\u9192，\u9700\u5728\u8fdb\u5165STOP\u524d\u8c03\u7528<\/p>\n
HAL_EXTI_GenerateSWInterrupt()<\/p>\n
\u9a8c\u8bc1\u4e2d\u65ad\u901a\u9053，\u4e14\u786e\u4fdd<\/p>\n
EXTI->IMR<\/p>\n
\u5bf9\u5e94\u4f4d\u5df2\u7f6e1<\/p>\n
–<\/p>\n
\u5524\u9192\u5f15\u811a\u914d\u7f6e<\/p>\n
：PB1\u2013PB4\u9700\u5728<\/p>\n
HAL_PWR_EnableWakeUpPin()<\/p>\n
\u4e2d\u6ce8\u518c，\u4f8b\u5982<\/p>\n
HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1, PWR_GPIO_BIT_1)<\/p>\n
（PB1\u5bf9\u5e94GPIO_BIT_1）\n<\/p>\n
\n \u6211\u5728\u5b9e\u9645\u6307\u5bfc\u84dd\u6865\u676f\u5907\u8d5b\u65f6\u53d1\u73b0，\u8d85\u8fc760%\u7684\u6309\u952e\u6545\u969c\u6e90\u4e8e\u65f6\u949f\u914d\u7f6e\u9057\u6f0f\u3002\u66fe\u6709\u4e00\u4e2a\u6848\u4f8b：\u5b66\u751f\u5c06PB1\u914d\u7f6e\u4e3a<\/p>\n
GPIO_MODE_IT_FALLING<\/p>\n
（\u4e0b\u964d\u6cbf\u4e2d\u65ad），\u4f46\u5fd8\u8bb0\u4f7f\u80fdSYSCFG\u65f6\u949f（<\/p>\n
__HAL_RCC_SYSCFG_CLK_ENABLE()<\/p>\n
），\u5bfc\u81f4EXTI\u7ebf\u8def\u65e0\u6cd5\u8fde\u63a5GPIO，\u73b0\u8c61\u662f\u6309\u952e\u5b8c\u5168\u65e0\u54cd\u5e94\u3002\u8fd9\u4e2a\u7ec6\u8282\u5728STM32\u4e2d\u6587\u53c2\u8003\u624b\u518c\u201cEXTI\u201d\u7ae0\u8282\u6709\u660e\u786e\u8bf4\u660e，\u4f46\u6781\u6613\u88ab\u5ffd\u7565\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
1. CT117E-M4\u5f00\u53d1\u677f\u6309\u952e\u786c\u4ef6\u67b6\u6784\u89e3\u6790CT117E-M4\u662f\u84dd\u6865\u676f\u5d4c\u5165\u5f0f\u7ec4\u7701\u8d5b\u6307\u5b9a\u7ade\u8d5b\u5e73\u53f0，\u5176\u6309\u952e\u7535\u8def\u8bbe\u8ba1\u4f53\u73b0\u4e86\u5178\u578b\u5de5\u4e1a\u7ea7\u4eba\u673a\u4ea4\u4e92\u63a5\u53e3\u7684\u5de5\u7a0b\u53d6\u820d\u3002\u8be5\u677f\u5361\u5de6\u4fa7\u5e03\u5c405\u4e2a\u7269\u7406\u6309\u952e，\u4f46\u529f\u80fd\u5b9a\u4f4d\u5b58\u5728\u672c\u8d28\u5dee\u5f02：\u5176\u4e2d4\u4e2a\u4e3a\u7528\u6237\u53ef\u7f16\u7a0b\u8f93\u5165\u6309\u952e（B1\u2013B4），1\u4e2a\u4e3a\u7cfb\u7edf\u590d\u4f4d\u4e13\u7528\u6309\u952e（RESET）\u3002\u8fd9\u79cd\u5206\u79bb\u5f0f\u8bbe\u8ba1\u5e76\u975e\u5197\u4f59，\u800c\u662f\u9075\u5faa\u5d4c\u5165\u5f0f\u7cfb\u7edf\u53ef\u9760\u6027\u8bbe\u8ba1\u539f\u5219\u2014\u2014\u5c06\u5173\u952e\u7cfb<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[8372,8374,8373],"topic":[],"class_list":["post-76932","post","type-post","status-publish","format-standard","hentry","category-server","tag-ct117e-m4","tag-gpio","tag-stm32"],"yoast_head":"\n