關(guān)于lpc1112深睡眠（低功耗）的調(diào)試報(bào)告

由于產(chǎn)品為移動(dòng)設(shè)備，所以功耗要求是比較嚴(yán)格的。目前采用了大MCU+小MCU的方式實(shí)現(xiàn)，小MCU主要是控制大MCU的電源，以實(shí)現(xiàn)系統(tǒng)的最低功耗。當(dāng)然也就要求小單片機(jī)也在不工作的時(shí)候，進(jìn)入低功耗狀態(tài)。

大MCU目前采用的是LPC1788，掉電模式理論最低功耗為65uA，但是實(shí)際調(diào)試并沒(méi)有達(dá)到那么?。ㄒ?yàn)橥庠O(shè)沒(méi)有完全斷電）。所以用小MCU來(lái)控制大MCU的電源，在需要的時(shí)候，在給大MCU供電。

小MCU采用的是LPC111x（lpc1112/28pin），深睡眠模式的理論值約為6uA(這個(gè)。)。

Lpc1112在不接外設(shè)的情況下，首先對(duì)深睡眠功耗進(jìn)行測(cè)試，目前達(dá)到了5uA左右。

以下為源代碼：

#include "nxplpc11xx.h"

#include "pmu.h"

#define NVIC_LP_SLEEPDEEP 1<<2

extern int key_value;

void WAKEUP6_IRQHandler(void)

{

//PMU->PCON = (1<<8); //清除標(biāo)志

SYSCON->STARTRSRP0CLR = 1<<6; /*清除喚醒中斷標(biāo)志 */

__nop();

key_value=2;

}

void WAKEUP5_IRQHandler(void)

{

//PMU->PCON = (1<<8); //清除標(biāo)志

SYSCON->STARTRSRP0CLR = 1<<5; /*清除喚醒中斷標(biāo)志 */

__nop();

key_value=1;

}

void config_ios(void);

void PMU_DeepSleep(void)

{

//reset IOs

config_ios();

/* Specify peripherals to be powered up again when returning from deep sleep mode */

SYSCON->PDAWAKECFG = SYSCON->PDRUNCFG;

SYSCON->PDRUNCFG |=(1<<3); //BOD power down

/* Switch MAINCLKSEL to IRC */

SYSCON->MAINCLKSEL = 0;

SYSCON->MAINCLKUEN = 0;

SYSCON->MAINCLKUEN = 1;

while (!(SYSCON->MAINCLKUEN & 0x01));

/* Ensure DPDEN is disabled in the power control register */

PMU->PCON = (1<<11); //Clear DPDFLAG if it was set

/* Clear the Deep Sleep Flag */

PMU->PCON = (1<<8);

/* All OFF */

//SYSCON->PDSLEEPCFG = 0x000018FF;

SYSCON->PDSLEEPCFG = 0x0000ffFF;

/* Specify peripherals to be powered up again when returning from deep sleep mode */

//SYSCON->PDAWAKECFG = SYSCON->PDRUNCFG;

///GPIO0-6

IOCON->PIO0_6 &= ~0x07;

IOCON->PIO0_6 |= 0x20;

GPIO0->DIR &= ~(0x01 << 6);

IOCON->PIO0_5 &= ~0x07;

IOCON->PIO0_5 |= 0x20;

GPIO0->DIR &= ~(0x01 << 5);

/* Only edge trigger. activation polarity on P0.5 p0.6 is FALLING EDGE. */

SYSCON->STARTAPRP0 &=~(1<<6|1<<5); //0x00000000;

/* Clear all wakeup source */

SYSCON->STARTRSRP0CLR |=(1<<6|1<<5); //0xFFFFFFFF;

/* Enable Port 0.4 as wakeup source. */

SYSCON->STARTERP0 = (0x1<<6|1<<5);

NVIC_ClearPendingIRQ(WAKEUP6_IRQn);

NVIC_EnableIRQ(WAKEUP6_IRQn); // P0.6 as wakeup

NVIC_ClearPendingIRQ(WAKEUP5_IRQn);

NVIC_EnableIRQ(WAKEUP5_IRQn); // P0.5 as wakeup

SCB->SCR = NVIC_LP_SLEEPDEEP; //0x04

/* Enter Deep Sleep mode */

__wfi();

}

void config_ios(void)

{

/* Configure all IOs as GPIO w/o pull-up & pull-down resistors */

IOCON->RESET_PIO0_0 = 0xC8; // RST_BOOT/P0_0

IOCON->PIO0_1 = 0xC8; //0xC0; // CLKOUT/CT32B0_MAT2/USB_SOF

IOCON->PIO1_8 = 0xC8;

IOCON->PIO0_2 = 0xC8; // SSEL/CT16B0_CAP0 //Trigger input

IOCON->PIO0_3 = 0xC8; //

IOCON->PIO0_4 = 0x80; // PIO

IOCON->PIO0_5 = 0x80; // PIO

IOCON->PIO1_9 = 0xC8; // CT16B1_MAT0

IOCON->PIO0_6 = 0xC8; // SCK0

IOCON->PIO0_7 = 0xC8;

IOCON->PIO0_8 = 0xC8; //0xC0; // SSP_MISO/CT16B0_MAT0/TRACE_CLK; MISO

IOCON->PIO0_9 = 0xC8; //0xC0; // SSP_MOSI/CT16B0_MAT1/TRACE_SWV; MOSI

IOCON->PIO0_10 = 0xC8; // JTAG_CLK/P0_10/SSP_CLK/CT16B0_MAT2

//IOCON->PIO1_10 = 0xC8; // ADCIN6/CT16B1_MAT1

IOCON->PIO0_11 = 0xC9; // JTAG_TDI/P0_11/ADCIN0/CT32B0_MAT3

IOCON->PIO1_0 = 0xC9; // JTAG_TMS/P1_0/ADCIN1/CT32B1_CAP0

IOCON->PIO1_1 = 0xC9; // JTAG_TDO/P1_1/ADCIN2/CT32B1_MAT0

IOCON->PIO1_2 = 0xC9; // JTAG_TRST/P1_2/ADCIN3/CT32B1_MAT1

IOCON->PIO1_3 = 0xC9; // ARM_SWD/P1_3/ADCIN4/CT32B1_MAT2

IOCON->PIO1_4 = 0xC8; // ADCIN5/CT32B1_MAT3/WAKEUP

//IOCON->PIO1_11 = 0xC8; // ADCIN7

IOCON->PIO1_5 = 0xC9; // UART_DIR/CT32B0_CAP0

IOCON->PIO1_6 = 0xC9; // UART_RXD/CT32B0_MAT0

IOCON->PIO1_7 = 0xC9; // UART_TXD/CT32B0_MAT1

/* GPIOs at outputs */

GPIO0->DIR = ~0; //Trigger Pin input only

GPIO1->DIR = ~0; //WAKEUP Pin and PIO1_6/RXD input only

/* GPIO outputs to LOW */

GPIO0->DATA = 0x0;

GPIO1->DATA = 0X0;

/* GPIOs at inputs */

GPIO0->DIR = 0;

GPIO1->DIR = 0;

return;

}

1、 需要對(duì)io重新配置，函數(shù)config_ios：

a) 配置位普通的io口功能，并且是下拉

b) 將io設(shè)置為輸出模式，并輸出信號(hào)為0；

c) 再將io口設(shè)置為輸入。（實(shí)驗(yàn)證明如果不再設(shè)置為輸入模式，功耗將增加）

注意：對(duì)io口的配置，也是在lpc1788芯片上進(jìn)行過(guò)實(shí)驗(yàn)的，通過(guò)以上操作會(huì)使功耗比較低。所以目前對(duì)單片機(jī)要進(jìn)入低功耗狀態(tài)，暫時(shí)對(duì)io配置都如上方式進(jìn)行。

2、以上配置，并沒(méi)有每一行代碼進(jìn)行調(diào)試，一些配置可能可以配置為其他值。

其中：

SYSCON->PDRUNCFG |=(1<<3); //BOD power down//

//SYSCON->PDSLEEPCFG = 0x000018FF;

SYSCON->PDSLEEPCFG = 0x0000ffFF;

這兩條代碼不能去掉。

SYSCON->PDSLEEPCFG 配置為0x00000aff，也會(huì)增加功耗，配置位0x000018FF功耗較低，所以看了看寄存器，在沒(méi)什么大問(wèn)題的情況下，索性都配置為0x0000ffFF。

因?yàn)樽蛱觳砰_(kāi)始建工程，找資料，所以對(duì)LPC1112還不是很熟悉，但是基本能滿足功耗要求，暫時(shí)先記錄下來(lái)，后續(xù)還是需要對(duì)這款單片機(jī)低功耗配置進(jìn)行更深入的了解。