Studio Bluetooth Forum Discussions

Dear friends,

I want to change device to tranmist data per 7s, so I want to use SAP command to do the setting. But I don't understand below parameters clearly.

1. What is the difference with high interval and low interval(high duration and low duaration)?

2. Can you do a detail explanation for interval and duration behavior?

3. How can I set to realize the function "tranmist data per 7s"?

Team,

I'm working with a customer using the 20719 within an application that is extremely sensitive errors and re-transmission.

Per the blog RanjithK_41​ created here: CYW20719 and CYW20735 Peripheral and HCI UARTs

The PUART on the 20719 will operate up to 3Mb/s max. However, they want to understand whether or not there is an associated error rate which needs to be calculated in order to assess actual throughput and potential for re-transmission of data.

As an example, the STM32 MCU documents a 1.73% error rate on its 3Mb/s UART, so they want to understand if our UART implementation is similar.

Thanks in advance for your help.

Hi Sir,

我们有芯片ble支持一主多从的模式吗，CYW或者psoc ble系列，同时连接一个主设备，至少3个从设备。

附件为蓝牙需求，请帮忙分析一下，是否有具体的型号推荐呢，CYW20706是否可行,谢谢。

Best Regards，

Leo

Our application audio DAC need Master clock(MCLK) input. Like 2.8224Mhz/5.6448Mhz/11.2896Mhz(fs:44.1Khz) or 3.072Mhz/6.144Mhz/12.288Mhz(fs:48Khz)

And it request must be synchronized with I2S SCK / WS.

But currently we use CYW20706 only support below signal for audio DAC.

■ I 2S Clock: I2S SCK

■ I 2S Word Select: I2S WS

■ I 2S Data Out: I2S DO

Have anyone can provide suggestion or parts for our application?

Thanks,

Mitchell

Hi

According to [WICED-HCI-Control-Protocol],
2.6 HCI Commands and Events During a Serial Flash Download
Execute UPDATE_BAUDRATE command and DOWNLOAD_MINIDRIVER command and
the module does not return response.

If we are forced to execute WRITE_RAM command,
Could you tell us if the FW is written properly?

Note: We are forced to write and it is working,
but we worry about if the FW is properly written on the module.

Also, could you tell me why the modle doesn't return response?
Example: If FW download fails once, EZ-Serial is broken and response does not return.

Thanks

Yang

HI,

I am using the CYBT-413034-02 WICED capable BT module for which the underlying processor is CYW20719.

SDK ver is 6.2

WICED-SDK Version: Wiced_006.002.001.0002

I took a reference application for A2DP sink from 20706 packages and used the CYBT-413034 platform to build and program the module.

I was able to advertise and connect the "wiced a2dp sink" device to the host on a Windows 10 PC and an Android 9 Mobile phone. The BT module connected correctly and appears as an audio interface in the Windows 10 PC.

When I try to stream the audio to the BT module, I can't see the data out from the module on the configured I2S lines.

I2S I/O configs:

I2S_DI        P0

I2S_DO      P29

I2S_WS      P38

I2S_CLK    P10/P11

I tried to place a scope on the WS and CLK lines to see if I get I2S data bytes and the changing WS and Clock pulses. But it simply does not show anything.

After some search on the Cypress forums, I found that the current WICED Studio does not support I2S on CYW20719. Is it true?

Is there an option to import older projects/libraries and compile them for 20719 modules to get it working. The forums and associated links say that the user application cannot control the I2S peripheral directly, but is there any way I can test out the I2S interface using an existing working sample code for the 20719.

Thanks,

Gurpreet Singh

We are currently working on the 20719 board. We know this board features Bluetooth 5.0 which allows two audio sink connections. Has anybody worked this before and how did you set up two connections?

Cyw20706 Systick's smallest minimum timer resolution is 12.5ms？？？Include/wiced_Timer.h  Line 52  "Defines the wiced timer types. These timers are system tick driven and a systick is 12.5 milliseconds.So the minimum timer resolution supported is 12.5 milliseconds"

If not, how to set it smaller?

/*
 * Defines the wiced timer types. These timers are system tick driven and a
 * systick is 12.5 milliseconds.So the  supported is
 * 12.5 milliseconds
 */
typedef enum
{
    WICED_SECONDS_TIMER = 1,
    WICED_MILLI_SECONDS_TIMER, /* The minimum resolution supported is 12.5 ms */
    WICED_SECONDS_PERIODIC_TIMER,
    WICED_MILLI_SECONDS_PERIODIC_TIMER /*The minimum resolution supported is 12.5 ms */
}wiced_timer_type_t;