How do DW1000 enter SLEEP or DEEPSLEEP, respectively?

[DecaLeo]

Hi,

After dwt_entersleep() the device is in DEEPSLEEP, the lowest power state of the device.

In this state it is not possible to communicate with the DW1000 via SPI, you must wake up the device first, and wait for it to be in IDLE mode.

See DEEPSLEEP description and section 2.4.1 SLEEP and DEEPSLEEP in the User manual.

I also suggest you have a look at our example API (sections 5.40 & 5.41). This document and the associated code has examples on configuring the sleep conditions before using dwt_entersleep().

Also look for any other answers in the forum on sleep/deepsleep.

DW1000 sleepmode working TWR issue

Hi I have developed TWR in STM32, it is working and gives the distance as its exact. but i have issue while inserting sleep mode logic into that. sleep and wakeup by CSn pin is working as i expected. but i am not able to get the exact distance. this is my configuration in my program. dwt_configuresleep(DWT_PRESRV_SLEEP | DWT_CONFIG, DWT_WAKE_CS | DWT_SLP_EN); this is how i call the sleeping method dwt_entersleep(); this is my wakeup sequence dwt_spicswakeup(dummy_buffer, RX_BUF_LEN); i …

timed dwt_entersleep() succeed each two cycles

Hello. I’m trying to make a power saving application. So, I use dwt_entersleep with dwt_configuresleepcnt(link_sleep_cnt). the value for link_sleep_cnt is 2. This count down register has a very coarse resolution, around 328 ms. Nevertheless, I have 1 second period so I’m making tests. I have the RST line monitorized by an oscilloscope, so I can see when the DW1000 is slept, and theoretically when the clocks are stabilized (when RST line is up again). The problem I have is that in one cycle it …

LDW1000_Software_API_Guide_rev2p7.pdf (1.5 MB)