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Pradeepa

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About Pradeepa

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    http://www.unboxNbeyond.com

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  1. I tried the ELPtronic software. It does not say that it is connected. But when I try to read the Firmware version then I can see Device Manager getting refreshed and then I get 'Unknown USB Device' enumeration. Which is almost the same thing happened to me when I use Energia. I'll post a question in TI forums and see whether I can get the FET firmware for the MSP430-G2 board. Then I can try to flash it through JTAG.
  2. I tried to use CCS. There also the behavior is same. I'll try that application and see. But I think it is a firmware issue. I'm trying to find the firmware of MSP430F16x chip and write it to the device.
  3. I did some more digging on this matter. I checked the pin27 of the TUSB3410VF chip using a oscilloscope to see whether the clocks are properly coming. The CLK3410 signal is driven by the MSP430F16x chip and I wanted to check whether the firmware is running properly on that chip. The result was as I expected. When I first connected the device to the PC I can see a 12 MHz square wave signal on PIN_49 of MSP430F16x chip. But as soon as Energia try to download the firmware to the device the clock gets disappeared. That's why the 'USB Device Not Recognized' message is coming. So somehow
  4. Hello, Today around 3~4 hours I have been trying to program my MSP-EXP430G2 launchpad using Energia. It looks like the FET in the board got bricked or something. When I connect the board to my Windows 8.1x64 machine it gets enumerated as the 'MSP430 Application UART (COM5)' which is good. But then when I use Energia to download a simple 'Blinky' example to the board it fails. It says, tilib: MSP430_Initialize: Could not find MSP-FET430UIF on specified COM port (error = 57) tilib: device initialization failed Also the device becomes 'Unknown USB Device (Device Descriptor Requ
  5. Hello, I think it is a good place to post information about this library I prepared. It is a very simple NRF24L01 library. The library is in C and can be used for any hardware platform with very minimal change. Please feel free to comment and criticize. I tested this using Stellaris Launchpad. Projects using CCS are available in GIT repo. Blog post: https://unboxnbeyond.wordpress.com/2015/04/03/pdlib_nrf24l01-v1-01-a-portable-nrf24l01-c-library-for-multiple-hardware-platform-integration/ Git repo: https://github.com/pradeepa-s/pdlib_nrf24l01 Thank you!!!
  6. Hello All, Recently I was working with some MSP430 project on my MSP430G2 board. But suddenly the USB-UART connection started not-working. I sniffed P1.2 using a logic analyzer and it looks like the data is coming properly. But it seems that it is not propagating to the PC USB port properly. I used HW-UART by switching the jumpers also. I sniffed the pin 32 of the TUSB3410VF pin also. The signal seems to be coming to that location also. My logic analyzer can decode that. I assume the TUSB chip is gone or some driver issue. I installed the MSP430 Application UART driver. I tr
  7. @@pabigot Just for a clarification, Since the instruction is 0xE000. First 4 bits (MSb) are 1110 (ie. T2 encoding) and the other 12 bits are zero (imm11= 0). So that means it is jumping to (PC + 0) location. In other words it is looping. I hope that's how you come to the conclusion that it is an optimized idle loop?
  8. I don't think the LM4F120 contains a QEI module. The new Tiva microcontroller does. Check the DC2 register to be sure.
  9. What is the processor you are using? Are you saying that the instruction is 'B.N 0xe000'? If that is the case the PC will contain address 0xe000. Instruction encoding encodes the instruction based on many factors. When executing the branch instruction it is calculating the offset based on the current PC address. Then will select the encoding scheme based on that address. So if your label is 0xE000 then it will determine how much offset it needs. Then will select the encoding. (I think there are some other factors also) As you can see, the ARM® v7-M Architecture Reference Manual con
  10. Hello, Just now I tried the whole process on my Tiva-Ware launchpad and I did not get any issue. I tried with toolchains I got from CodeBench (http://www.mentor.com/embedded-software/sourcery-tools/sourcery-codebench/editions/lite-edition/) and also from launchpad.net (https://launchpad.net/gcc-arm-embedded). You do not need to do that. Even with that line it works. I was checking StellarisWare previously. This might be the issue. Try downloading the toolchains that I used (I added the links to make it easy for you). It may be an issue related to the toolchain. I tried
  11. I have tried building and flashing the qs-rgb binary to my Stellaris launchpad. It worked without any issue. Steps, Set up the arm-none-eabi toolchain. I used 'arm-2013.11-24-arm-none-eabi-i686-pc-linux-gnu' toolchain. But any newer versions should ideally work too. Set up the $PATH variable to point to the 'bin' directory of the toolchain. Clone the lm4flash application using 'git clone https://github.com/utzig/lm4tools.git' Build the lm4flash application using 'make' Navigate to 'qs-rgb' project folder in the Stellarisware/boards/ek-lm4f120... Run 'make clean' Run 'make' The binarie
  12. Just one thing I observed in the qs-rgb example 'Makefile'. There is a line, Try commenting that line. Are you using Stellaris launchpad or Tiva launchpad?
  13. I hope you are compiling the application from "StellarisWare\boards\ek-lm4f120xl\blinky" directory. I believe the button issue is related to some error in your configuration. Cannot say without checking the code.
  14. Hello, Based on the post I assume you are using Linux for the developments. Did you try building the project using Code Composer Studio? Are there any errors/warnings in your compilations? What is the command you ran to flash the binary to the firmware?
  15. @@Sahil @@lawrence_jeff, Recently I saw this post. Interrupt enabling was never hard for me. So I decided to give some time to figure out what the actual issue in your first code. I think you need to refer the User Guide of the API after going through the introductory lab sessions to get somewhat clearer view on these APIs. Under NVIC it is specifically mentioned, But in your code you have not done that. You have not enabled interrupts for PORTC. The workaround proposed works because within the "GPIOPortIntRegister" function internally it calls IntEnable() function.
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