資源簡介
pwm呼吸燈 采用pwm的方式,在固定的頻率下,采用占空比的方式來實現LED亮度的變化。占空比為0,LED燈不亮,占空比為100%,則LED燈最亮。所以將占空比從0到100%,再從100%到0不斷變化,就可以實現LED燈實現特效呼吸。

代碼片段和文件信息
#include?“beep.h“
void?BEEP_Init(void)
{
??GPIO_InitTypeDef?GPIO_InitStructure;?//定義結構體變量
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOFENABLE);?//使能端口F時鐘
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_OUT;?//輸出模式
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8;//管腳設置F8
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_100MHz;//速度為100M
GPIO_InitStructure.GPIO_OType=GPIO_OType_PP;//推挽輸出
GPIO_InitStructure.GPIO_PuPd=GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOF&GPIO_InitStructure);?//初始化結構體
GPIO_SetBits(GPIOFGPIO_Pin_8);//輸出高電平
}
?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????580??2017-10-02?10:48??12.PWM呼吸燈\APP\beep\beep.c
?????文件????????128??2017-10-02?20:48??12.PWM呼吸燈\APP\beep\beep.h
?????文件???????2865??2017-10-03?19:35??12.PWM呼吸燈\APP\exti\exti.c
?????文件????????220??2017-10-03?16:47??12.PWM呼吸燈\APP\exti\exti.h
?????文件???????1244??2017-10-02?21:06??12.PWM呼吸燈\APP\key\key.c
?????文件????????800??2017-10-03?11:02??12.PWM呼吸燈\APP\key\key.h
?????文件????????854??2017-10-01?20:34??12.PWM呼吸燈\APP\led\led.c
?????文件????????139??2017-10-01?20:43??12.PWM呼吸燈\APP\led\led.h
?????文件???????1511??2017-10-16?18:50??12.PWM呼吸燈\APP\pwm\pwm.c
?????文件????????109??2017-10-10?20:41??12.PWM呼吸燈\APP\pwm\pwm.h
?????文件???????2084??2015-10-27?12:06??12.PWM呼吸燈\DebugConfig\Target_1_STM32F407ZG.dbgconf
?????文件?????109951??2015-05-18?22:14??12.PWM呼吸燈\Libraries\CMSIS\core_cm4.h
?????文件??????17427??2015-05-18?22:13??12.PWM呼吸燈\Libraries\CMSIS\core_cmFunc.h
?????文件??????26854??2015-05-18?22:14??12.PWM呼吸燈\Libraries\CMSIS\core_cmInstr.h
?????文件??????22948??2015-05-18?22:13??12.PWM呼吸燈\Libraries\CMSIS\core_cmSimd.h
?????文件??????29604??2015-05-18?22:16??12.PWM呼吸燈\Libraries\CMSIS\startup_stm32f40_41xxx.s
?????文件??????53318??2016-08-18?14:37??12.PWM呼吸燈\Libraries\CMSIS\system_stm32f4xx.c
?????文件???????2232??2015-05-18?22:16??12.PWM呼吸燈\Libraries\CMSIS\system_stm32f4xx.h
?????文件???????6921??2015-05-20?16:36??12.PWM呼吸燈\Libraries\STM32F4xx_StdPeriph_Driver\inc\misc.h
?????文件??????32877??2015-05-20?16:36??12.PWM呼吸燈\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_adc.h
?????文件??????27315??2015-05-20?16:36??12.PWM呼吸燈\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_can.h
?????文件??????12444??2015-05-20?16:36??12.PWM呼吸燈\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_cec.h
?????文件???????2413??2015-05-20?16:36??12.PWM呼吸燈\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_crc.h
?????文件??????14478??2015-05-20?16:36??12.PWM呼吸燈\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_cryp.h
?????文件??????14943??2015-05-20?16:36??12.PWM呼吸燈\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_dac.h
?????文件???????4293??2015-05-20?16:36??12.PWM呼吸燈\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_dbgmcu.h
?????文件??????12974??2015-05-20?16:36??12.PWM呼吸燈\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_dcmi.h
?????文件??????28879??2015-05-20?16:36??12.PWM呼吸燈\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_dma.h
?????文件??????19698??2015-05-20?16:36??12.PWM呼吸燈\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_dma2d.h
?????文件???????8009??2015-05-20?16:36??12.PWM呼吸燈\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_exti.h
............此處省略169個文件信息
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