单片机休眠和掉电模式到底是什么关系？

7106 单片机低功耗

问答对人有帮助，内容完整，我也想知道答案 0 单片机低功耗的关键就是休眠，休眠的最高境界就是掉电模式 /************************************************************************// * @file main.c * @version V3.00 * $Revision: 2 $ * $Date: 16/10/25 4:29p $ * @brief Show how to wake up system from Power-down mode by GPIO interrupt. * @note * Copyright (C) 2016 Nuvoton Technology Corp. All rights reserved. *****************************************************************************/ #include #include "NUC029xGE.h" #define PLLCTL_SETtiNG CLK_PLLCTL_72MHz_HXT #define PLL_CLOCK 72000000 /---------------------------------------------------------------------------------------------------------/ / Function for System Entry to Power Down Mode / /---------------------------------------------------------------------------------------------------------/ void PowerDownFunction(void) { / Check if all the debug messages are finished / UART_WAIT_TX_EMPTY(UART0); / Enter to Power-down mode / CLK_PowerDown(); } /* * @brief PortA/PortB IRQ * * @param None * * @return None * * @Details The PortA/PortB default IRQ, declared in startup_NUC029xGE.s. / void GPAB_IRQHandler(void) { / To check if PB.3 interrupt occurred / if(GPIO_GET_INT_FLAG(PB, BIT3)) { GPIO_CLR_INT_FLAG(PB, BIT3); printf("PB.3 INT occurred.n"); } else { / Un-expected interrupt. Just clear all PB interrupts / PB->INTSRC = PB->INTSRC; printf("Un-expected interrupts.n"); } } void SYS_Init(void) { /---------------------------------------------------------------------------------------------------------/ / Init System Clock / /---------------------------------------------------------------------------------------------------------/ / Enable HIRC clock (Internal RC 22.1184MHz) / CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk); / Wait for HIRC clock ready / CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk); / Select HCLK clock source as HIRC and HCLK source divider as 1 / CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1)); / Enable HXT clock (external XTAL 12MHz) / CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk); / Wait for HXT clock ready / CLK_WaitClockReady(CLK_STATUS_HXTSTB_Msk); / Set core clock as PLL_CLOCK from PLL / CLK_SetCoreClock(PLL_CLOCK); / Enable UART module clock / CLK_EnableModuleClock(UART0_MODULE); / Select UART module clock source as HXT and UART module clock divider as 1 / CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UARTSEL_HXT, CLK_CLKDIV0_UART(1)); /---------------------------------------------------------------------------------------------------------/ / Init I/O Multi-function / /---------------------------------------------------------------------------------------------------------/ / Set multi-function pins for UART0 RXD and TXD / SYS->GPA_MFPL &= ~(SYS_GPA_MFPL_PA2MFP_Msk \| SYS_GPA_MFPL_PA3MFP_Msk); SYS->GPA_MFPL \|= (SYS_GPA_MFPL_PA3MFP_UART0_RXD \| SYS_GPA_MFPL_PA2MFP_UART0_TXD); } void UART0_Init() { /---------------------------------------------------------------------------------------------------------/ / Init UART / /---------------------------------------------------------------------------------------------------------/ / Reset UART0 / SYS_ResetModule(UART0_RST); / Configure UART0 and set UART0 baud rate / UART_Open(UART0, 115200); } /---------------------------------------------------------------------------------------------------------/ / MAIN function / /---------------------------------------------------------------------------------------------------------/ int main(void) { / Unlock protected registers / SYS_UnlockReg(); / Init System, peripheral clock and multi-function I/O / SYS_Init(); / Lock protected registers / SYS_LockReg(); / Init UART0 for printf / UART0_Init(); printf("nnCPU @ %d Hzn", SystemCoreClock); printf("+-------------------------------------------------------+n"); printf("\| GPIO Power-Down and Wake-up by PB.3 Sample Code \|n"); printf("+-------------------------------------------------------+nn"); / Configure PB.3 as Input mode and enable interrupt by rising edge trigger / GPIO_SetMode(PB, BIT3, GPIO_MODE_INPUT); GPIO_EnableInt(PB, 3, GPIO_INT_RISING); NVIC_EnableIRQ(GPAB_IRQn); / Enable interrupt de-bounce function and select de-bounce sampling cycle time is 1024 clocks of LIRC clock / GPIO_SET_DEBOUNCE_TIME(GPIO_DBCTL_DBCLKSRC_LIRC, GPIO_DBCTL_DBCLKSEL_1024); GPIO_ENABLE_DEBOUNCE(PB, BIT3); / Unlock protected registers before entering Power-down mode / SYS_UnlockReg(); / Waiting for PB.3 rising-edge interrupt event / printf("Enter to Power-Down ......n"); / Enter to Power-down mode / PowerDownFunction(); printf("System waken-up done.nn"); while(1); } / (C) COPYRIGHT 2016 Nuvoton Technology Corp. */ 0
2022-5-11 12:22:03　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × heks 该类别下有 20 个回答。邀请回答新星之火12138 该类别下有 18 个回答。邀请回答 wang21cj 该类别下有 17 个回答。邀请回答 hgimtk 该类别下有 16 个回答。邀请回答科源机电该类别下有 15 个回答。邀请回答 liutiefu 该类别下有 15 个回答。邀请回答 kghfh 该类别下有 14 个回答。邀请回答 chm5 该类别下有 13 个回答。邀请回答 dgfdf 该类别下有 13 个回答。邀请回答 723662364d 该类别下有 13 个回答。邀请回答一巷清苑该类别下有 13 个回答。邀请回答 ggfvxv 该类别下有 12 个回答。邀请回答 YOYOOO 该类别下有 12 个回答。邀请回答 h1654155275.6473 该类别下有 12 个回答。邀请回答 hjhdf 该类别下有 12 个回答。邀请回答 efwedfd 该类别下有 12 个回答。邀请回答小华同学该类别下有 12 个回答。邀请回答 jsqueh 该类别下有 12 个回答。邀请回答红旧衫该类别下有 12 个回答。邀请回答早知该类别下有 12 个回答。邀请回答举报刘悌耀相关推荐 • 51单片机串口通信方式1到底和计数器T1有什么关系？ 261 • 时钟周期和单片机晶振频率有什么关系？ 3074 • 单片机进入掉电模式，怎么降低整体功耗？ 241 • 单片机的独立按键到底是什么？ 1859 • 单片机PCA和PWM之间有什么关系？ 1524 • C语言和单片机有什么关系？ 1526 • 单片机内存和程序大小有什么关系吗？怎么选用不同内存大小的单片机？ 253 • 嵌入式系统、单片机及ZigBee之间具体有什么关系呢 5112 • stm8s单片机的fHSI和fcpu之间有什么关系？ 301 • 单片机到底是什么，谁能用通俗易懂的语言来解释一下，谢谢！ 7530 3个回答

答案对人有帮助，有参考价值 0 CLK_PowerDown(); 掉电模式的关键函数BSP已经提供了，我们看看到底怎么实现的 /** * @brief Enter to Power-down mode * @param None * @return None * @details This function is used to let system enter to Power-down mode. n * The register write-protection function should be disabled before using this function. / void CLK_PowerDown(void) { / Set the processor uses deep sleep as its low power mode / SCB->SCR \|= SCB_SCR_SLEEPDEEP_Msk; / Set system Power-down enabled/ CLK->PWRCTL \|= CLK_PWRCTL_PDEN_Msk; / Chip enter Power-down mode after CPU run WFI instruction */ __WFI(); }

2022-5-12 10:41:36 评论举报张涵

答案对人有帮助，有参考价值 0 掉电会触发“低压” or "什么“中断，得有个后备电源（电容，UPS）吧，然后进入”休眠“？

2022-5-12 10:41:48 评论举报刘艺星