nrf52-ble-image-transfer-demo on Ubuntu 16.04

RE: nrf52-ble-image-transfer-demo on Ubuntu 16.04

Jimmy Wong — Thu, 21 Mar 2019 00:48:15 GMT

it is better to check on the Arducam HW first. You may use other board such as Arduino UNO and run the demo to verify it. Or use the logic analyzer to measure the signal.

RE: nrf52-ble-image-transfer-demo on Ubuntu 16.04

RavY — Tue, 19 Mar 2019 18:11:11 GMT

Hi Jimmy Wong,

Thanks for your quick check suggestion. I could confirm that the camera is NOT detected.
I get the prints
<info> app: TWI scanner started.
<info> app: No device was found.

What do you suspect?
1. Faulty Hardware (Arducam)?
2. Improper connection to the DK with jumper wires?
3. Incorrect configuration settings?

Please suggest.

Thanks

RE: nrf52-ble-image-transfer-demo on Ubuntu 16.04

Jimmy Wong — Tue, 19 Mar 2019 15:08:34 GMT

Hi,

I recommend another approach to do the quick check.

You can run the examples/peripheral/twi_scanner to check the I2C whether you can detect this camera module or not. if yes, it would show you the i2c address of this camera module.

if it doesn't work, it is better to use the logic analyzer / scope to double check on the configuration first.

RE: nrf52-ble-image-transfer-demo on Ubuntu 16.04

RavY — Tue, 19 Mar 2019 15:03:46 GMT

Hi,

Does the connection given in https://github.com/NordicPlayground/nrf52-ble-image-transfer-demo/blob/master/pics/840_cam_side.jpg and connecting the DK to USB wont give 5V?

If not how can I give 5V input?

Unfortunately I dont have a multi-meter handy to confirm.

RE: nrf52-ble-image-transfer-demo on Ubuntu 16.04

Jimmy Wong — Tue, 19 Mar 2019 13:11:35 GMT

You need to make sure the voltage to this camera module by using 5V.

RE: nrf52-ble-image-transfer-demo on Ubuntu 16.04

RavY — Tue, 19 Mar 2019 13:03:40 GMT

Yes, I am using the code you referred to https://github.com/jimmywong2003/nrf52-ble-image-transfer-demo

//Step 1: select the hardware platform, only one at a time
#define OV2640_MINI_2MP

#define ARDUCAM_SHIELD_V2

//Step 2: Select one of the camera module, only one at a time
#if (defined(ARDUCAM_SHIELD_REVC) || defined(ARDUCAM_SHIELD_V2))

#define OV2640_CAM

Am I missing anything?

RE: nrf52-ble-image-transfer-demo on Ubuntu 16.04

Jimmy Wong — Tue, 19 Mar 2019 12:22:45 GMT

Also, you need to select the camera module, in nrf52-ble-image-transfer-demo/arducam_mini_2mp/memorysaver.h

RE: nrf52-ble-image-transfer-demo on Ubuntu 16.04

Jimmy Wong — Tue, 19 Mar 2019 12:21:48 GMT

hi , if you are using the side connection, you need to set #define PCA10056_USE_FRONT_HEADER 0

RE: nrf52-ble-image-transfer-demo on Ubuntu 16.04

Jimmy Wong — Tue, 19 Mar 2019 12:16:37 GMT

Hi,

RE: nrf52-ble-image-transfer-demo on Ubuntu 16.04

Jimmy Wong — Tue, 19 Mar 2019 12:15:27 GMT

HI, if you are using the connection configuration as

RE: nrf52-ble-image-transfer-demo on Ubuntu 16.04

Jimmy Wong — Tue, 19 Mar 2019 12:15:27 GMT

HI, if you are using the connection configuration as

RE: nrf52-ble-image-transfer-demo on Ubuntu 16.04

Jimmy Wong — Tue, 19 Mar 2019 12:15:26 GMT

HI, if you are using the connection configuration as

RE: nrf52-ble-image-transfer-demo on Ubuntu 16.04

RavY — Mon, 18 Mar 2019 18:01:39 GMT

Thanks for the links provided.

I was able to debug the code using SES proj in "examples\ble_peripheral\nrf52-ble-image-transfer-demo-master\pca10056\s140\ses".

I noticed that the code runs into infinite while.

main() -> camera_init() -> arducam_mini_2mp_open()

//Check if the ArduCAM SPI bus is OK
arducam_write_reg(ARDUCHIP_TEST1, 0x55);
temp = arducam_read_reg(ARDUCHIP_TEST1);
//Serial.println(temp);
if (temp != 0x55)
{
//nrfSystem.registerError(LS_ERROR, "ARDUCAM", 0, "SPI interface non responsive");
while(1);
}

The value of temp is 0xff.

I confirmed that the below code gets executed in camera_init() function

m_camera_init.pinScl = 27;
m_camera_init.pinSda = 26;
m_camera_init.pinSck = 32 + 15;
m_camera_init.pinMiso = 32 + 14;
m_camera_init.pinMosi = 32 + 13;
m_camera_init.pinCsn = 32 + 12;

Do I have to modify any of the settings/Pin configurations?

Please advice.

Thank You.

RE: nrf52-ble-image-transfer-demo on Ubuntu 16.04

Jimmy Wong — Fri, 15 Mar 2019 01:27:25 GMT

You can refer to the youtube.

https://www.youtube.com/watch?v=YZouRE_Ol8g&list=PLx_tBuQ_KSqGHmzdEL2GWEOeix-S5rgTV

There are 7 video (tutorial for the SES).

RE: nrf52-ble-image-transfer-demo on Ubuntu 16.04

RavY — Thu, 14 Mar 2019 16:21:25 GMT

Thank you Jimmy Wong for your suggestion.
I am new to SES. Can you please provide me steps to build this on SES or if any reference material available which can help me.
Thanks again

RE: nrf52-ble-image-transfer-demo on Ubuntu 16.04

Jimmy Wong — Wed, 13 Mar 2019 01:59:49 GMT

Hi,

I used the Segger Embedded Studio on the SDK 15.3 with Arducam v2640_MINI_2MP_PLUS (this is the latest camera module) with nRF52840 board.

You can try this first.

You can have a look on the code (https://github.com/jimmywong2003/nrf52-ble-image-transfer-demo).

if you are using the 2MP_PLUS, you need to config,

#define FLUSH_FIRST_BYTE 0 /* 0 -- V2640_MINI_2MP_PLUS , 1 -- V2640_MINI_2MP*/