BLE and APU coexistense problem

⚠️
Hi there.. thanks for coming to the forums. Exciting news! we’re now in the process of moving to our new forum platform that will offer better functionality and is contained within the main Dialog website. All posts and accounts have been migrated. We’re now accepting traffic on the new forum only - please POST any new threads at//www.wsdof.com/support. We’ll be fixing bugs / optimising the searching and tagging over the coming days.
7 posts / 0 new
Last post
Sun, 2020-08-09 11:02
#1
aectaan
Offline
Last seen:3 months 1 week ago
加入:2019-10-02 07:06
BLE and APU coexistense problem

Hi Dialog,

Found strange thing: there is no possibility of coexistence BLE and APU: when audio processing unit runs, BLE is unable to work.

When my device work without audio processing, it looks ok: advertising works, connection establishes as usual, all fine.

When I start APU task, connection breaks with 0x1F error (BLE_HCI_ERROR_UNSPECIFIED_ERROR). Also, in case APU started before connection establishment, I don't see any advertising data in my nRF connect.

Best Regards,

Egor Markov

Device:
DA1469x
Sun, 2020-08-09 16:11
aectaan
Offline
Last seen:3 months 1 week ago
加入:2019-10-02 07:06
Finally, link goes down

Finally, link goes down forever after this call:

__STATIC_INLINE void hw_pdm_enable(void) { REG_SET_BIT(CRG_PER, PDM_DIV_REG, CLK_PDM_EN); }

Looks like a critical bug.

Sun, 2020-08-09 16:13
aectaan
Offline
Last seen:3 months 1 week ago
加入:2019-10-02 07:06
After all, my PDM pins

毕竟,我的PDM针位于P1_04一个d P0_28 - as far as possible from RF part

Sun, 2020-08-09 16:38
aectaan
Offline
Last seen:3 months 1 week ago
加入:2019-10-02 07:06
Ok, at the PDM clock 512kHz

Ok, at the PDM clock 512kHz and sample rate 8k it works. But I need better audio quality, than this

Sun, 2020-08-09 17:04
aectaan
Offline
Last seen:3 months 1 week ago
加入:2019-10-02 07:06
The maximum achievable PDM

The maximum achievable PDM sampling frequency (without connection loss) is 665Khz. Really disappointed.

Thu, 2020-08-13 15:00
aectaan
Offline
Last seen:3 months 1 week ago
加入:2019-10-02 07:06
PM_Dialog, could you please

@PM_Dialog, could you please provide this problem to the team?

Mon, 2020-08-17 10:24
PM_Dialog
Offline
Last seen:21 hours 42 min ago
Staff
加入:2018-02-08 11:03
Hi Egor,

Hi Egor,

Sorry for our late response. Will take it offline from the forum.

Thanks, PM_Dialog