黃石網(wǎng)站設(shè)計制作公司,愛鏈,靜態(tài)網(wǎng)站做畢業(yè)設(shè)計,網(wǎng)頁設(shè)計師聯(lián)盟官網(wǎng)目錄 一、簡單介紹 二、cubeMX配置 開調(diào)試口 開PWM 時鐘 按鍵 三、代碼編寫 四、效果 五、備注 六、工程鏈接 一、簡單介紹 TPS61165是一款白色LED燈驅(qū)動芯片#xff0c;輸入電壓3~18V#xff0c;開關(guān)電流最大1.2A。具有LED開路保護(hù)#xff0c;可以PWM調(diào)光或者高低…目錄一、簡單介紹二、cubeMX配置開調(diào)試口開PWM時鐘按鍵三、代碼編寫四、效果五、備注六、工程鏈接一、簡單介紹TPS61165是一款白色LED燈驅(qū)動芯片輸入電壓3~18V開關(guān)電流最大1.2A。具有LED開路保護(hù)可以PWM調(diào)光或者高低電平控制。參考芯片推薦設(shè)計原理圖如下選擇0.62歐姆電阻則串聯(lián)電流等于0.2/0.62322mAVBUS連接12V輸入電源筆者選用STM32F103C8T6作為MCULED_CTRL1連接單片機的PA7引腳使用兩個按鍵設(shè)置占空比亮度MCU電路二、cubeMX配置開調(diào)試口開PWM設(shè)置PWM波頻率為20khz初始占空比10%時鐘開啟外部高速時鐘按鍵選擇輸入上拉筆者使用ST7789屏幕觀測因此還啟用了SPI接口三、代碼編寫主要涉及到TFT彩屏按鍵輸入定時器PWM輸出的內(nèi)容主要代碼如下/* Includes ------------------------------------------------------------------*/ #include main.h #include dma.h #include spi.h #include tim.h #include gpio.h /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ #include keydrv.h #include st7789.h /* USER CODE END Includes */ /* Private typedef -----------------------------------------------------------*/ /* USER CODE BEGIN PTD */ /* USER CODE END PTD */ /* Private define ------------------------------------------------------------*/ /* USER CODE BEGIN PD */ /* USER CODE END PD */ /* Private macro -------------------------------------------------------------*/ /* USER CODE BEGIN PM */ /* USER CODE END PM */ /* Private variables ---------------------------------------------------------*/ /* USER CODE BEGIN PV */ /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); /* USER CODE BEGIN PFP */ /* USER CODE END PFP */ /* Private user code ---------------------------------------------------------*/ /* USER CODE BEGIN 0 */ int8_t light 10; uint8_t str[20]; /* USER CODE END 0 */ /** * brief The application entry point. * retval int */ int main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configuration--------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash 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_DMA_Init(); MX_SPI2_Init(); MX_TIM3_Init(); /* USER CODE BEGIN 2 */ KeyDrv_Config(); ST7789_Init(); ST7789_Clear(BLACK); HAL_TIM_Base_Start(htim3); HAL_TIM_PWM_Start(htim3, TIM_CHANNEL_2); /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { if (button[0].buttonAction CLICK_SINGLE) { button[0].buttonAction CLICK_NULL; light 10; if (light 100) { light 100; } __HAL_TIM_SET_COMPARE(htim3, TIM_CHANNEL_2, light); } if (button[1].buttonAction CLICK_SINGLE) { button[1].buttonAction CLICK_NULL; light - 10; if (light 0) { light 0; } __HAL_TIM_SET_COMPARE(htim3, TIM_CHANNEL_2, light); } sprintf(str, light:%d , light); ST7789_ShowString(0, 140, str, Font_16x26, ST7789_RGB565(0xFFFF), BLACK); /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ } /* USER CODE END 3 */ }四、效果五、備注值得一提的是把與TPS61165的CTRL相連的單片機的PA7引腳由PWM改成推挽輸出就可以實現(xiàn)點亮/熄滅LED取決于IO電平的高低。六、工程鏈接STM32基于TPS61165芯片的LED驅(qū)動電路資源-CSDN下載