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一开始用自己的程序发现休眠时，正常工作时电流有40mA，休眠后居然32mA也有这么大，后来用下面这个例程，也是一样的效果。
哪位大侠救救我啊！我是新手，不明白这是怎么回事！应该怎么办！
//-----------------------------------------------------------------------------
// F93x_SleepMode_PortMatchWake.c
//-----------------------------------------------------------------------------
// Copyright (C) 2007 Silicon Laboratories, Inc.
// http://www.silabs.com
//
// Program Description:
//
// This program flashes the red LED on the C8051F930 target board using the
// interrupt handler for Timer2 when the MCU is awake.
//
// Pressing the switch on P0.3 will place the device in a low power mode.
// Pressing the switch on P0.2 will wake up the device using Port Match.
//
// How To Test:
//
// 1) Download code to the 'F93x target board
// 2) Ensure that pins 1-2, 3-4, 5-6, 7-8 are shorted together on the
// J8 header
// 3) Run the program. Press P0.3 to place the device in sleep mode.
// Press P0.2 to wake it back up. The Red LED will blink when
// the device is awake.
//
//
// Target: C8051F93x-C8051F92x
// Tool chain: Generic
// Command Line: None
//
// Release 1.0
// -Initial Revision (FB)
// -8 OCT 2007
//
//-----------------------------------------------------------------------------
// Includes
//-----------------------------------------------------------------------------
#include <compiler_defs.h> // compiler declarations
#include <C8051F930_defs.h> // SFR declarations
//-----------------------------------------------------------------------------
// Pin Declarations
//-----------------------------------------------------------------------------
SBIT (RED_LED, SFR_P1, 5); // '0' means ON, '1' means OFF
SBIT (YELLOW_LED, SFR_P1, 6); // '0' means ON, '1' means OFF
SBIT (SW2, SFR_P0, 2); // SW2 == 0 means switch pressed
SBIT (SW3, SFR_P0, 3); // SW3 == 0 means switch pressed
//-----------------------------------------------------------------------------
// Global CONSTANTS
//-----------------------------------------------------------------------------
#define SYSCLK 20000000 // SYSCLK frequency in Hz
#define LED_ON 0
#define LED_OFF 1
#define SUSPEND 0x40 // Value to write to PMU0CF to place
// the device in Suspend mode
#define SLEEP 0x80 // Value to write to PMU0CF to place
// the device in Sleep Mode
#define POWER_MODE SLEEP // Select between Suspend and Sleep
// mode. When debugging, if the
// MCU is stopped/halted while
// in Sleep Mode, the connection
// to the IDE will be lost. The
// IDE connection will not be lost
// if the MCU is stopped/halted
// while in suspend mode.
//-----------------------------------------------------------------------------
// Function PROTOTYPES
//-----------------------------------------------------------------------------
void OSCILLATOR_Init (void);
void PORT_Init (void);
void Timer2_Init (int counts);
//-----------------------------------------------------------------------------
// MAIN Routine
//-----------------------------------------------------------------------------
void main (void)
{
U8 wakeup_event_pending;
U8 wakeup_source;
PCA0MD &= ~0x40; // WDTE = 0 (clear watchdog timer
// enable)
PORT_Init (); // Initialize Port I/O
OSCILLATOR_Init (); // Initialize Oscillator
Timer2_Init (SYSCLK / 12 / 32); // Init Timer2 to generate interrupts
// at a 32 Hz rate.
// Setup the Port Match Wake-up Source to wake up on the falling
// edge of P0.2 (when the switch is pressed)
P0MASK = 0x04; // Mask out all pins except for P0.2
P0MAT = 0x04; // P0.2 should be HIGH while the device
// is in the low power mode
EA = 1; // Enable global interrupts
//----------------------------------
// Main Application Loop
//----------------------------------
while (1)
{
if(!SW3) // If the P0.3 switch is pressed
{
// Configure the Port I/O for Low Power Mode
RED_LED = LED_OFF; // Turn off the LED or other
// high-current devices
// Place the device in the Low Power Mode
PMU0CF = 0x20; // Clear all wake-up flags
wakeup_event_pending = 0; // Clear software event pending flag
if(!SW2) // Check each wake-up event to ensure
{ // it has not occured while the
wakeup_event_pending = 1; // wake-up flags were being cleared
} // In this example, we are only using
// a single wake-up source
if(!wakeup_event_pending)
{
YELLOW_LED = LED_ON; // Turn on Yellow LED to indicate that
// the device is entering the low power
// state
// Enable Port Match wake-up source and place the device in
// the low power state
PMU0CF = (POWER_MODE | 0x02);
}
//--------------------------------------------------------------------
// Device Sleeping until P0.2 is pressed
//--------------------------------------------------------------------
// Turn off the Yellow LED to indicate that we are in the
// high power mode
YELLOW_LED = LED_OFF;
RED_LED = LED_ON; // Turn on the LED or other
// high-current devices
// Read the wake-up source flags
wakeup_source = PMU0CF & 0x1F;
// Clear the wake-up source flags
PMU0CF = 0x20;
// Decode the wakeup source
if(wakeup_source & 0x10)
{
// We have been awaken by the reset pin (most likely C2 traffic)
EA = 0;
YELLOW_LED = LED_ON;
RED_LED = LED_ON;
while(1);
}
if(wakeup_source & 0x02)
{
// We have been awaken by a port match
}
}
}
}
//-----------------------------------------------------------------------------
// Initialization Subroutines
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// OSCILLATOR_Init
//-----------------------------------------------------------------------------
//
// Return Value : None
// Parameters : None
//
// This function initializes the system clock to use the internal low power
// oscillator.
//
//-----------------------------------------------------------------------------
void OSCILLATOR_Init (void)
{
RSTSRC = 0x06; // Enable missing clock detector and
// leave VDD Monitor enabled.
CLKSEL = 0x04; // Select low power internal osc.
// divided by 1 as the system clock
}
//-----------------------------------------------------------------------------
// PORT_Init
//-----------------------------------------------------------------------------
//
// Return Value : None
// Parameters : None
//
// This function configures the crossbar and ports pins.
//
// P0.2 digital open-drain Switch 2
// P0.3 digital open-drain Switch 3
// P1.5 digital push-pull Red LED
// P1.6 digital push-pull Yellow LED
//-----------------------------------------------------------------------------
void PORT_Init (void)
{
P0MDIN |= 0x0C; // P0.2, P0.3 are digital
P1MDIN |= 0x60; // P1.5, P1.6 are digital
P0MDOUT &= ~0x0C; // P0.2, P0.3 are open-drain
P1MDOUT |= 0x60; // P1.5, P1.6 are push-pull
P0 |= 0x0C; // Set P0.2, P0.3 latches to '1'
XBR2 = 0x40; // Enable crossbar and enable
// weak pull-ups
}
//-----------------------------------------------------------------------------
// Timer2_Init
//-----------------------------------------------------------------------------
//
// Configure Timer2 to 16-bit auto-reload and generate an interrupt at
// interval specified by <counts> using SYSCLK/48 as its time base.
//
void Timer2_Init (int counts)
{
TMR2CN = 0x00; // Stop Timer2; Clear TF2;
// use SYSCLK/12 as timebase
CKCON &= ~0x60; // Timer2 clocked based on T2XCLK;
TMR2RL = -counts; // Init reload values
TMR2 = TMR2RL; // initalize timer to reload value
ET2 = 1; // enable Timer2 interrupts
TR2 = 1; // start Timer2
}
//-----------------------------------------------------------------------------
// Interrupt Service Routines
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// Timer2_ISR
//-----------------------------------------------------------------------------
// This routine changes the state of the LED whenever Timer2 overflows.
//
INTERRUPT(Timer2_ISR, INTERRUPT_TIMER2)
{
TF2H = 0; // clear Timer2 interrupt flag
RED_LED = !RED_LED; // change state of LED
}
//-----------------------------------------------------------------------------
// End Of File
//-----------------------------------------------------------------------------
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阿莫论坛20周年了！感谢大家的支持与爱护！！
曾经有一段真挚的爱情摆在我的面前，我没有珍惜，现在想起来，还好我没有珍惜……
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发表于 2013-9-27 20:47:29
楼主
