WICED Studio Bluetooth

Hi,

We are using CYBT-353027 EVAL for communicating with I2C slave device. So, configuring CYBT-353027 EVAL as an I2C master. But, we are not able to communicate with I2C slave device.

While observing waveform over logic analyzer,  we found that clock(SCL) is not generated properly. The frequency observed in waveform is not actually clock but just a pulse.

we are setting frequency using "wiced_hal_i2c_set_speed()" API.

Can you please suggest what should be done to resolve this? I have also attached are the screenshots from logic analyzer.

Below is the snippet of code we are using for I2C communication

-----------

#include "wiced_hal_i2c.h"

#define I2C_SLAVE 0x10

UINT8 status = 0xFF;

UINT8 data[2] = {0xAA,0x55};

UINT8 data_read[3];

enum

{​​​​​​​

    I2CM_SPEED_100KHZ = 240,

    I2CM_SPEED_400KHZ = 60,

    I2CM_SPEED_800KHZ = 30,

    I2CM_SPEED_1000KHZ = 24,

}​​​​​​​;

// For Initializing I2c as master

wiced_hal_i2c_init(WICED_I2C_SDA_I2S_DOUT_PCM_OUT_SCL_I2S_DIN_PCM_IN);

// Set Speed

wiced_hal_i2c_set_speed(I2CM_SPEED_100KHZ);

// To write data to slave

wiced_hal_i2c_write((UINT8 *)&data,sizeof(data), I2C_SLAVE);

// To read data from slave

wiced_hal_i2c_read((UINT8 *)&data_read,sizeof(data_read), I2C_SLAVE);

Thanks,

Pratik

Hello,

Please tell me about the p_cyspp_status (.CYSPP, ID = 10/1) event of EZ-Serial FW.
I understand the following Bit mask in "S (status)" of Event Parameters.

- Bit0 (0x01) = Unacknowledged data subscribed
.CYSPP,S=01
=> Indicates that 0x01(Notify) was written to the Configuration Descriptor(UUID 0x2902) of "Unacknowledged Data Characteristic(UUID 65333333-A115-11E2-9E9A-0800200CA102)".

- Bit1 (0x02) = Acknowledged data subscribed
.CYSPP,S=02
=> Indicates that 0x02(Indicate) was written to the Configuration Descriptor(UUID 0x2902) of "Acknowledged Data Characteristic(UUID 65333333-A115-11E2-9E9A-0800200CA101)".

- Bit2 (0x04) = RX flow subscribed
.CYSPP,S=04
=> Indicates that 0x02(Indicate) was written to the Configuration Descriptor(UUID 0x2902) of "RX Flow Characteristic(UUID 65333333-A115-11E2-9E9A-0800200CA103)".

However, I don't know when the following Bits will be effective.
Please tell me the conditions under which these Flags are set.
- Bit 3 (0x08) = RX flow blocked by remote Server
- Bit 4 (0x10) = CYSPP peer support verified
- Bit 5 (0x20) = Data mode active (used internally)

Best regards,
TK

Hello,

I'm testing Pairing on BLE using the new Firmware Version (v1.2.27).

The following settings are made.

- smp_set_security_parameters (SSBP, ID=7/11)

   SSBP,M=4D (D = 0x08|0x04|0x01= LE Secure Connection, MITM, Bonding)

- smp_set_fixed_passkey (SFPK, ID=7/13)

   SFPK,P=1E240 ( = 123456 [6-digit])

The terminal to connect to uses an Android tablet.

Pairing (1 to 3) is performed according to the following procedure.

1. Connection request from Android device

     => C event is output (Tablet address is random address)

            E,0035,C,C=01,A=4FA62934D02D,T=01,I=0028,L=0000,O=02BC,B=00

2. Execute "smp_pair (/P,ID=7/3)" for the Connection Handle to request pairing.

            /P,C=01,M=4D,B=01,K=10,P=00

3. Pair and Encryption completed

            E,000F,PR,C=01,R=0000

            E,000E,ENC,C=01,S=00

4. Execute "smp_query_bonds (/QB,ID=7/1)" and check the Bonding list.

            /QB

            R,000E,/QB,0000,C=01

            E,001B,B,B=01,A=4FA62934D02D,T=01

After completing this pairing, disconnect once and reconnect from the tablet.

Then, in the C event, a different address will be output.

            E,0035,C,C=01,A=7BEF6766B766,T=01,I=0028,L=0000,O=02BC,B=00

On my system, the addresses listed in /QB are paired addresses and I try not to perform step 2 above.

However, every time I reconnect, the address of the C event changes, and pairing (/P) is executed every time.

[Question]
Is there a way to identify the address of the Central Device once paired?

If it is a public address, it is a fixed value.

However, in BLE, it is a random address, so it would be nice if I knew the IRK.

Is there a way to do that?

Best regards,

TK

Hello,

I am trying Deep sleep mode with the new FW (v1.2.27) of CYBT-353027-02.
https://www.cypress.com/documentation/software-and-drivers/ez-serial-ez-ble-module-firmware-platform

The settings are as follows.

SSLP$,L=02
.CYSPPSP$,P=1 (Default)
* I use CYBT-353027-02 EVB.

When entering deep sleep mode, LP_Mode pin is set to High.
(The current value of Module is several uA, so I think it is Deep Sleep.)

However, returning this LP_MODE pin to Low does not return the Module.
(The condition for returning is determined by issuing a BOOT Event from Module)

On the other hand, a similar test was performed with CYBT-343026-01 EVB.
(The LP_MODE pin is set to Active Low.)

In this Module, when LP_MODE is changed to Low, a Boot Event is issued and the original Active state is restored.

Why doesn't CYBT-353027-02 EVB return to active mode?

Best regards,
TK