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this test demonstrates sleeping in both hibernate and doze.

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wake up is controlled with the wake up timer.

read the comments for current measurments.
This commit is contained in:
Mariano Alvira 2009-05-11 17:01:31 -04:00
parent bc59b04bbf
commit 4ca63b9b86
1 changed files with 25 additions and 11 deletions
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36
tests/sleep.c
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@ -1,11 +1,14 @@
#define GPIO_PAD_DIR0 0x80000000
#define GPIO_DATA0 0x80000008
#define CRM_WU_CNTL 0x80003004
#define CRM_SLEEP_CNTL 0x80003008
#define CRM_STATUS 0x80003018
#define GPIO_PAD_PU_EN0 0x80000010
#define GPIO_PAD_PU_EN1 0x80000014
#define ADC_CONTROL 0x80000018
#define CRM_WU_CNTL 0x80003004
#define CRM_WU_TIMEOUT 0x80003024
#define CRM_SLEEP_CNTL 0x80003008
#define CRM_STATUS 0x80003018
#define CRM_XTAL_CNTL 0x80000040
#define DELAY 400000
@ -21,15 +24,17 @@ __attribute__ ((section ("startup"))) void main(void) {
/* disable all pullups */
/* seems to make a slight difference (2.0uA vs 1.95uA)*/
reg32(GPIO_PAD_PU_EN0) = 0;
reg32(GPIO_PAD_PU_EN1) = 0;
reg16(ADC_CONTROL) = 0; /* internal Vref2 */
// reg32(GPIO_PAD_PU_EN0) = 0;
// reg32(GPIO_PAD_PU_EN1) = 0;
// reg16(ADC_CONTROL) = 0; /* internal Vref2 */
// reg16(CRM_XTAL_CNTL) = 0x052; /* default is 0xf52 */ /* doesn't anything w.r.t. power */
/* go to sleep */
// reg32(CRM_WU_CNTL) = 0x1; /* enable wakeup from wakeup timer */
reg32(CRM_WU_CNTL) = 0; /* don't wake up */
// reg32(CRM_WU_CNTL) = 0; /* don't wake up */
reg32(CRM_WU_CNTL) = 0x1; /* enable wakeup from wakeup timer */
reg32(CRM_WU_TIMEOUT) = 1875000; /* wake 10 sec later if doze */
// reg32(CRM_WU_TIMEOUT) = 20000; /* wake 10 sec later if hibernate w/2kHz*/
// reg32(CRM_SLEEP_CNTL) = 1; /* hibernate, RAM page 0 only, don't retain state, don't power GPIO */ /* approx. 2.0uA */
// reg32(CRM_SLEEP_CNTL) = 0x41; /* hibernate, RAM page 0 only, retain state, don't power GPIO */ /* approx. 10.0uA */
@ -39,12 +44,21 @@ __attribute__ ((section ("startup"))) void main(void) {
// reg32(CRM_SLEEP_CNTL) = 0xf1; /* hibernate, RAM page 0&1 only, retain state, power GPIO */ /* approx. 16.1uA - possibly with periodic refresh*/
// reg32(CRM_SLEEP_CNTL) = 2; /* doze , RAM page 0 only, don't retain state, don't power GPIO */ /* approx. 69.2 uA */
// reg32(CRM_SLEEP_CNTL) = 0x42; /* doze , RAM page 0 only, retain state, don't power GPIO */ /* approx. 77.3uA */
reg32(CRM_SLEEP_CNTL) = 0x42; /* doze , RAM page 0 only, retain state, don't power GPIO */ /* approx. 77.3uA */
// reg32(CRM_SLEEP_CNTL) = 0x52; /* doze , RAM page 0&1 only, retain state, don't power GPIO */ /* approx. 78.9uA */
// reg32(CRM_SLEEP_CNTL) = 0x62; /* doze , RAM page 0&1 only, retain state, don't power GPIO */ /* approx. 81.2uA */
// reg32(CRM_SLEEP_CNTL) = 0x72; /* doze , RAM page 0&1 only, retain state, don't power GPIO */ /* approx. 83.4uA - possibly with periodic refresh*/
reg32(CRM_SLEEP_CNTL) = 0xf2; /* doze , RAM page 0&1 only, retain state, power GPIO */ /* approx. 82.8uA - possibly with periodic refresh*/
reg32(CRM_STATUS) = 1; /* write 1 to sleep_sync --- this totally powers down */
// reg32(CRM_SLEEP_CNTL) = 0xf2; /* doze , RAM page 0&1 only, retain state, power GPIO */ /* approx. 82.8uA - possibly with periodic refresh*/
while((reg32(CRM_STATUS) & 0x1) == 0) { continue; }
reg32(CRM_STATUS) = 1; /* write 1 to sleep_sync --- this clears the bit (it's a r1wc bit) and powers down */
/* asleep */
while((reg32(CRM_STATUS) & 0x1) == 0) { continue; }
reg32(CRM_STATUS) = 1; /* write 1 to sleep_sync --- this clears the bit (it's a r1wc bit) and finishes wakeup */
volatile uint32_t i;