DW3000 wake up fails

Hi,

I have some trouble with the DWS3000 (with DW3110 on it).
2 of 3 Boards I bought do not reply with a valid device ID.

My wake up sequence: (like in the simple tx example)

  • pull down the reset line for 50 ms
  • wait 2 ms
  • wait till chip reaches IDLE_RC state by checking if “dwt_checkidlerc()” returns true
  • call “dwt_initialise(DWT_DW_INIT)”
The main function of my code
//runs in Zepyhr RTOS
//printk: debug output on UART
//k_msleep: sleep for x miliseconds

void main(void)
{
	/* startup messages */
	printk("*** Starting %s %s ***\n", FIRMWARE_NAME, GIT_VERSION);
#ifdef WITH_SYSTEM_VERSION_H
	printk("*** Part of %s %s ***\n", SYSTEM_NAME, SYSTEM_GIT_VERSION);
#endif /* WITH_SYSTEM_VERSION_H */


	/* init UART */
	uart_dev = device_get_binding(UART_DEVICE);
	if (!uart_dev) {
		printk("UART: Device driver not found.\n");
		return;
	}

	/* init SPI */
	spi_dev = device_get_binding(SPI_DEVICE);
	if (!spi_dev) {
		printk("SPI: Device driver not found.\n");
		return;
	}

	spi_cs_gpio = device_get_binding(SPI_CS_DEVICE);
	gpio_pin_configure(spi_cs_gpio, SPI_CS_PIN, GPIO_OUTPUT_HIGH); /* inits CS to high */

	spi_cfg.operation = SPI_WORD_SET(8) | SPI_TRANSFER_MSB | SPI_OP_MODE_MASTER;
	spi_cfg.frequency = 10000000U;

	/* init DW1000 */
	reset_DW1000();

	k_msleep(2);

	while (!dwt_checkidlerc()) /* Need to make sure DW IC is in IDLE_RC before proceeding */
    {
		printk(".");
		k_msleep(10);
	};

	if (dwt_initialise(DWT_DW_INIT) == DWT_SUCCESS) {
		printk("Decawave init successful.\n");
	} else {
		printk("Decawave init failed.\n");
	}

	uint32_t id = dwt_readdevid();
	printk("Decawave ID: %x\n", id);

	//uint32_t test = dwt_read32bitoffsetreg(SEQ_CTRL_ID, 0);
	//printk("SEQ_CTRL_ID = %u\n", test);

	return; //will stop the thread
}

One of the chips responds with “deca0302” as device ID.
The other two chips do not reach the IDLE_RC state. If I skip the check for IDLE_RC state they respond with “6fe50101” as device ID. Then the dwt_initialise(DWT_DW_INIT) call returns DWT_ERROR.

I verified all SPI communication with a logic analyzer:

trace with the working chip

name type start_time duration mosi miso
SPI enable 0.00209885 1.99999999e-09
SPI result 0.002102622 1.2e-06 0x00 0x00
SPI result 0.00210893 1.202e-06 0x00 0x02
SPI result 0.002111332 1.2e-06 0x00 0x03
SPI result 0.00211357 1.202e-06 0x00 0xCA
SPI result 0.002115812 1.2e-06 0x00 0xDE
SPI disable 0.002119928 2e-09
SPI enable 0.00212152 1.99999999e-09
SPI result 0.00212317 1.202e-06 0xD6 0x00
SPI result 0.00212557 1.202e-06 0x20 0x00
SPI result 0.00212781 1.202e-06 0x01 0x00
SPI result 0.002130052 1.2e-06 0x00 0x00
SPI disable 0.002134168 1.99999999e-09
SPI enable 0.002134918 2e-09
SPI result 0.00213655 1.202e-06 0xD6 0x00
SPI result 0.00213895 1.202e-06 0x10 0x00
SPI result 0.00214119 1.202e-06 0x04 0x00
SPI result 0.00214343 1.202e-06 0x00 0x00
SPI disable 0.002147554 1.99999988e-09
SPI enable 0.002148268 1.99999988e-09
SPI result 0.00214987 1.202e-06 0xD6 0x00
SPI result 0.00215227 1.202e-06 0x20 0x00
SPI result 0.00215451 1.202e-06 0x02 0x00
SPI result 0.00215675 1.202e-06 0x00 0x00
SPI disable 0.002160844 2.00000011e-09
SPI enable 0.002161478 1.99999988e-09
SPI result 0.00216313 1.202e-06 0x56 0x00
SPI result 0.00216553 1.202e-06 0x40 0x00
SPI result 0.00217128 1.202e-06 0x00 0x08
SPI result 0.00217368 1.202e-06 0x00 0x98
SPI result 0.00217592 1.202e-06 0x00 0x88
SPI result 0.00217816 1.202e-06 0x00 0x88
SPI disable 0.002182238 1.99999999e-09
SPI enable 0.002183204 1.99999999e-09
SPI result 0.00218488 1.202e-06 0xD6 0x00
SPI result 0.00218728 1.202e-06 0x20 0x00
SPI result 0.00218952 1.202e-06 0x01 0x00
SPI result 0.00219176 1.202e-06 0x00 0x00
SPI disable 0.002195924 1.99999999e-09
SPI enable 0.002196574 1.99999999e-09
SPI result 0.00219819 1.202e-06 0xD6 0x00
SPI result 0.00220059 1.202e-06 0x10 0x00
SPI result 0.00220283 1.202e-06 0x05 0x00
SPI result 0.00220507 1.202e-06 0x00 0x00
SPI disable 0.002209194 2.00000011e-09
SPI enable 0.002209854 2e-09
SPI result 0.00221145 1.202e-06 0xD6 0x00
SPI result 0.00221385 1.202e-06 0x20 0x00
SPI result 0.00221609 1.202e-06 0x02 0x00
SPI result 0.00221833 1.202e-06 0x00 0x00
SPI disable 0.002222408 1.99999999e-09
SPI enable 0.002223064 2.00000011e-09
SPI result 0.00222466 1.202e-06 0x56 0x00
SPI result 0.00222706 1.202e-06 0x40 0x00
SPI result 0.00223283 1.202e-06 0x00 0x19
SPI result 0.00223523 1.202e-06 0x00 0x88
SPI result 0.00223747 1.202e-06 0x00 0x09
SPI result 0.00223971 1.202e-06 0x00 0x08
SPI disable 0.002243788 1.99999999e-09
SPI enable 0.002244714 1.99999988e-09
SPI result 0.00224632 1.202e-06 0xD6 0x00
SPI result 0.00224872 1.202e-06 0x20 0x00
SPI result 0.00225096 1.202e-06 0x01 0x00
SPI result 0.0022532 1.202e-06 0x00 0x00
SPI disable 0.002257304 1.99999999e-09
SPI enable 0.002257974 2.00000011e-09
SPI result 0.00225957 1.202e-06 0xD6 0x00
SPI result 0.00226197 1.202e-06 0x10 0x00
SPI result 0.00226421 1.202e-06 0x0A 0x00
SPI result 0.00226645 1.202e-06 0x00 0x00
SPI disable 0.002270574 2.00000011e-09
SPI enable 0.002271258 2.00000011e-09
SPI result 0.00227286 1.2e-06 0xD6 0x00
SPI result 0.00227526 1.202e-06 0x20 0x00
SPI result 0.0022775 1.202e-06 0x02 0x00
SPI result 0.00227974 1.202e-06 0x00 0x00
SPI disable 0.002283818 1.99999988e-09
SPI enable 0.002284508 1.99999999e-09
SPI result 0.00228613 1.202e-06 0x56 0x00
SPI result 0.00228853 1.202e-06 0x40 0x00
SPI result 0.00229425 1.202e-06 0x00 0x13
SPI result 0.00229665 1.2e-06 0x00 0x00
SPI result 0.00229889 1.202e-06 0x00 0x14
SPI result 0.00230113 1.202e-06 0x00 0x00
SPI disable 0.002305208 1.99999988e-09
SPI enable 0.002306348 1.99999999e-09
SPI result 0.00230793 1.202e-06 0xD6 0x00
SPI result 0.00231033 1.202e-06 0x22 0x00
SPI result 0.00231257 1.2e-06 0xFF 0x00
SPI result 0.00231481 1.2e-06 0xFF 0x00
SPI result 0.00231705 1.202e-06 0x80 0x00
SPI result 0.00231929 1.202e-06 0x01 0x00
SPI disable 0.002323218 1.99999999e-09
SPI enable 0.002323892 2.00000011e-09
SPI result 0.00232547 1.202e-06 0xE2 0x00
SPI result 0.00232787 1.2e-06 0x7E 0x00
SPI result 0.00233011 1.202e-06 0xE0 0x00
SPI result 0.00233235 1.202e-06 0xFF 0x00
SPI result 0.00233459 1.202e-06 0x14 0x00
SPI result 0.00233683 1.202e-06 0x00 0x00
SPI disable 0.002340788 2.00000011e-09
SPI enable 0.002341452 1.99999999e-09
SPI result 0.00234305 1.2e-06 0xD6 0x00
SPI result 0.00234545 1.2e-06 0x20 0x00
SPI result 0.00234769 1.2e-06 0x01 0x00
SPI result 0.00234993 1.2e-06 0x00 0x00
SPI disable 0.002354008 2.00000011e-09
SPI enable 0.002354678 1.99999988e-09
SPI result 0.00235628 1.2e-06 0xD6 0x00
SPI result 0.00235868 1.2e-06 0x10 0x00
SPI result 0.00236092 1.2e-06 0x20 0x00
SPI result 0.00236316 1.2e-06 0x00 0x00
SPI disable 0.002367282 1.99999988e-09
SPI enable 0.002367968 2.00000011e-09
SPI result 0.00236957 1.2e-06 0xD6 0x00
SPI result 0.00237197 1.2e-06 0x20 0x00
SPI result 0.00237421 1.2e-06 0x02 0x00
SPI result 0.00237645 1.2e-06 0x00 0x00
SPI disable 0.002380542 2.00000011e-09
SPI enable 0.002381172 1.99999988e-09
SPI result 0.00238277 1.2e-06 0x56 0x00
SPI result 0.00238517 1.2e-06 0x40 0x00
SPI result 0.00239092 1.2e-06 0x00 0x40
SPI result 0.00239332 1.2e-06 0x00 0x02
SPI result 0.00239556 1.2e-06 0x00 0x00
SPI result 0.0023978 1.2e-06 0x00 0x10
SPI disable 0.002401878 1.99999999e-09
SPI enable 0.002403108 1.99999999e-09
SPI result 0.00240474 1.2e-06 0xD6 0x00
SPI result 0.00240714 1.2e-06 0x20 0x00
SPI result 0.00240938 1.2e-06 0x01 0x00
SPI result 0.00241162 1.2e-06 0x00 0x00
SPI disable 0.002415762 1.99999999e-09
SPI enable 0.002416438 1.99999999e-09
SPI result 0.00241806 1.2e-06 0xD6 0x00
SPI result 0.00242046 1.2e-06 0x10 0x00
SPI result 0.0024227 1.2e-06 0x1F 0x00
SPI result 0.00242494 1.2e-06 0x00 0x00
SPI disable 0.002429028 1.99999988e-09
SPI enable 0.002429688 1.99999999e-09
SPI result 0.0024313 1.2e-06 0xD6 0x00
SPI result 0.0024337 1.2e-06 0x20 0x00
SPI result 0.00243594 1.2e-06 0x02 0x00
SPI result 0.00243818 1.2e-06 0x00 0x00
SPI disable 0.002442258 2.00000011e-09
SPI enable 0.002442948 1.99999988e-09
SPI result 0.00244457 1.2e-06 0x56 0x00
SPI result 0.00244697 1.2e-06 0x40 0x00
SPI result 0.00245271 1.2e-06 0x00 0x00
SPI result 0.00245511 1.2e-06 0x00 0x00
SPI result 0.00245735 1.2e-06 0x00 0x00
SPI result 0.00245959 1.2e-06 0x00 0x00
SPI disable 0.002463668 1.99999999e-09
SPI enable 0.002464688 1.99999988e-09
SPI result 0.00246629 1.2e-06 0xD6 0x00
SPI result 0.00246869 1.2e-06 0x20 0x00
SPI result 0.00247093 1.2e-06 0x01 0x00
SPI result 0.00247317 1.2e-06 0x00 0x00
SPI disable 0.002477252 2.00000011e-09
SPI enable 0.002477928 1.99999988e-09
SPI result 0.00247955 1.2e-06 0xD6 0x00
SPI result 0.00248195 1.2e-06 0x10 0x00
SPI result 0.00248419 1.2e-06 0x1E 0x00
SPI result 0.00248643 1.2e-06 0x00 0x00
SPI disable 0.002490552 1.99999999e-09
SPI enable 0.002491212 1.99999988e-09
SPI result 0.00249283 1.2e-06 0xD6 0x00
SPI result 0.00249523 1.2e-06 0x20 0x00
SPI result 0.00249747 1.2e-06 0x02 0x00
SPI result 0.00249971 1.2e-06 0x00 0x00
SPI disable 0.002503802 1.99999999e-09
SPI enable 0.002504488 1.99999988e-09
SPI result 0.00250608 1.2e-06 0x56 0x00
SPI result 0.00250848 1.2e-06 0x40 0x00
SPI result 0.00251422 1.2e-06 0x00 0x28
SPI result 0.00251662 1.2e-06 0x00 0x00
SPI result 0.00251886 1.2e-06 0x00 0x00
SPI result 0.0025211 1.2e-06 0x00 0x00
SPI disable 0.002525178 1.99999999e-09
SPI enable 0.002526212 1.99999999e-09
SPI result 0.002528 1.2e-06 0xD2 0x00
SPI result 0.0025304 1.2e-06 0x50 0x00
SPI result 0.00253264 1.2e-06 0x28 0x00
SPI disable 0.002536852 2.00000011e-09
SPI enable 0.004708436 2.00000011e-09
SPI result 0.004710072 1.2e-06 0x00 0x00
SPI result 0.004716052 1.2e-06 0x00 0x02
SPI result 0.004718452 1.2e-06 0x00 0x03
SPI result 0.004720692 1.2e-06 0x00 0xCA
SPI result 0.004722932 1.2e-06 0x00 0xDE
SPI disable 0.00472701 2.00000011e-09
trace with the non-working chip (skip the check for IDLE_RC state)

name type start_time duration mosi miso
SPI enable 0.002098884 2.00000011e-09
SPI result 0.002102656 1.2e-06 0x00 0x00
SPI result 0.002108964 1.202e-06 0x00 0x01
SPI result 0.002111364 1.202e-06 0x00 0x01
SPI result 0.002113604 1.202e-06 0x00 0xE5
SPI result 0.002115844 1.202e-06 0x00 0x6F
SPI disable 0.002119962 1.99999999e-09
SPI enable 0.003944932 2.00000011e-09
SPI result 0.003946518 1.2e-06 0x00 0x00
SPI result 0.003952508 1.2e-06 0x00 0x01
SPI result 0.003954908 1.2e-06 0x00 0x01
SPI result 0.003957148 1.2e-06 0x00 0xE5
SPI result 0.003959388 1.202e-06 0x00 0x6F
SPI disable 0.003963466 1.99999999e-09

Is there something missing in my weak up sequence?

Hey folks, colleague of Michael here.

We’d like to get some help on this, please :slightly_smiling_face: If someone from customer support might have the chance to take a peek that would be highly appreciated. I suppose we are either missing something very simple or, there might be some hardware fault here.
Thank you very much!

Here is some more technical details:

We have tried other SPI clock rates (781kHz to 38MHz) but to no avail. The 38.4MHz and 3.3V look fine.

Issue with this is, we are not getting the ill-reading devices to work at all. The DTU clock runs at some odd rate, here’s a comparison between our three boards:

It looks to me like there is some internal clocking problem with two of the chips we have.

Sorry for quickly replying again, Form wouldn’t let me post more than one picture…

This is the hardware in question:

The modules were acquired from Mouser end-May and all DW3110 bear the same markings.

Hi,
in my opinion is something wrong with your SPI driver. By checking your ID in binary:
DECA0302 -> 11011110110010100000001100000010
6FE50101 -> 01101111111001010000000100000001

as you can see it is one bit shifted to the right. Try different SPI configuration.

JK

Hi,

Thank you leapslabs!
Since on the DWS3000 the SPICPOL pin conflicts with the UART_TX of the Arduino Header, this pin is initialized to HIGH by default on my application.
Then the DW3000 changes the MISO line at the time the µC reads, which explains the different behavior over the different boards.

Thank you so much.
Michael