PSoC™ 4 Forum Discussions

I'm currently working on a BLE project with PSoC 4. Since today everything worked fine. But now I'm facing the error "undefined reference to main" every time I compile my project. Didn't change anything on the project or code since the last successful compilation.

Hope you can help me.

 

i have a code which has three services and can send data simulataneously to the app with different time intervals.initially when i connect the device  gets connected  properly and the device gets disconnected after some time and re-connects back as i have auto connectivity implemented in my android application.After a certain number of reconnections it gets status 129 and status 133 and the device stops advertising..

how can i make the device advertise without resetting the device

I have developed an Android app to interface to my Cypress BLE device.  

I would like to detect a lost connection and have the app return to the "device scanning" page.  Is there a proper way to detect a lost connection?

Thanks

Rich

I tried to add a question about weird behavior I'm seeing from my C code, but the "spam filter" blocked the post.

I guess it didn't like the code snippet in the body of the post. How can I ask my question?

Edit: Maybe I can edit the post enough to ask my question without including code...?

This is for a project that interfaces with an 8-bit CPU by emulating RAM/ROM.

It works, under some circumstances. There is an if statement for the ROM emulation area (based on what range is being addressed), and the other branch is for the read/write buffer area. Handling the ROM area first is to make it fast enough to execute machine language from, directly. That works, too, sort-of.

The catches are:

1. There is a Status Read() that already assures that the range addessed will be either ROM or buffer; the ROM part is if the page number is below 12. The second branch should work with just an else, and SHOULD be faster that way, but it actually causes the ROM part to fail if I don't use an else if in the buffer part.

2.  I have a function that has a switch statement to do other processing based on a command passed to the last address of the buffer. Right now there is one command in there. If I add a second case to the switch statement, with some calls in that block, that will cause the "ROM" reads to become unreliable - some bytes are read correctly, and some are not.

Why should the main loop care how many sections are in the function when I'm not passing any commands or even addressing the section that might cause the function to be called? Why is an else if, with an already known area in the if, faster than a plain else?

Please help. This is really making me crazy!

Edit again: added the main loop and function in the attached text file. Hopefully you can see it. This is the current code that works... until I uncomment the other lines in req = 2.

Thanks,
​Paul
 

Hello,

I seem to be having some trouble setting up I2C, and/or formatting the data to view it over the UART.  I'm hoping someone can please identify my error(s) and help me to correct them.

I am using the PSoC4 Pioneer kit.

I have connected to the SCL/SDA the corresponding pins of an MCP9808 breakout board (and +5V/GND).
MCP9808 I2C Address: 0x18
MCP9808 Temperature Register: 0x05  (2 Byte data output)

​I have confirmed with a different MCU/FW setup that the MCP9808 is working correctly over I2C.

The output I2C data out (Address and Register seem to be sending correctly) I see on the scope is not data I would expect - which leads me to believe that my I2C protocol is incorrect.
The scope data is also not what I'm seeing reported in TeraTerm - so I may have data formatting issues too.
I am seeing my UART test reported in TeraTerm, so that seems to be fine.

Any guidance would be greatly appreciated!  Thank you.