Questions tagged [stellaris]

Stellaris is a series of Cortex-M microcontrollers from Texas Instruments, since which has been enhanced and rebranded as the Tiva series.

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Implementing periodic sensor data storage and GPRS transmission

Hardware setup I am using custom hardware driven by a TIVA TM4C (specifically, TM4C123GXL) to control a microgrid with battery energy storage, solar panels, four loads controlled by relay, and a ...
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1answer
813 views

GPIO using StellarisWare with LM4F120H5QR LaunchPad. SW2 not working as expected

I am trying to figure out how to properly use StellarisWare, the built in ROM calls, for GPIO. The Stellaris LaunchPad has two switches (SW1, SW2) and three LEDs (RED, GREEN, BLUE). I wrote a little ...
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3answers
5k views

How to simplify UART interrupt handlers on Tiva TM4C with SIMcom 900

UARTIntHandler0 interfaces to the USB UART for debugging. UARTIntHandler1 interfaces to the SIM900 GSM module. The purpose of ...
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1answer
669 views

PWM Red LED on Stellaris Launchpad

I am trying to PWM the red LED on a Stellaris LaunchPad, following the recipe in the datasheet p.706, taking a couple shortcuts from the Stellaris® Peripheral Driver Library. I cannot figure out why ...
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4answers
414 views

Connecting a galvanometer directly to a microcontroller's PWM output

Is it a good idea to connect a galvanometer (100 µA panel meter) directly to a PWM output of a microcontroller (or any other digital device for that matter)? I set PWM frequency to approximately 10 ...
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1answer
162 views

Accessing RS232 Rx Tx instead of OTG on stellaris LM4F232H5QD evaluation board

I am asking two related questions here: I can see a program uart_echo for stellaris lm4f232h5qd . What I want is that I need to access this data on teraterminal using PA1 and PA2 pins instead of OTG....
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1answer
550 views

undefined reference to `ROM_SysTickIntRegister'

I am trying to program the Stellaris LaunchPad to blink the red LED at 1 Hz, driven by the sysTick interrupt. I get an error though that I've been unable to solve yet. The C source I came up with ...
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3answers
2k views

controlling 3x BLDC motors

I'd like to control 3x L6234 IC's (3x BLDC motors) with the cheapest microcontroller/board/lauchpad but I'm a bit confused about the requirements needed for the microcontroller. As I understood each ...
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5answers
2k views

Why does ADC conversion time vary?

I'm using TI Tiva C TM4C123GH6PM on a Launchpad combined with an AD 9850 DDS to create frequency modulator. Currently I have an extremely simple program which basically sets up microcontroller's ...
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1answer
872 views

TIVA C series launchpads for arduino programmers

I have bought a Tiva C series Launchpad TM4C1294NCPDT by TI and wish to do a project on face recognition. I will soon get a DSP EVM by TI, but still confused which one to choose (MAY be the one with ...
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0answers
76 views

Stellaris Launchpad: Register to store value that can be read after soft-reset

I am working with an LM4F120 Stellaris Launchpad. In my firmware I want to trigger a soft-reset but only once. When the firmware gets out of reset it should read from a register to see wheterh the sot-...
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1answer
1k views

Capacitor charging-like signal on SPI port's MOSI line

I'm using Texas Instruments Tiva C Launchpad to communicate with a micro SD and micro SDHC cards. The development board uses TM4C123GH6PM chip and I'm using TI RTOS's FatFS example for the Launchpad ...
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0answers
582 views

Stellaris Launchpad: UART over GPIO PIN in ASM

I want to initialize and use UART on my LM4F120 Stellaris Launchpad in ASM. I found a reference code on how to to this on this ...
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4answers
851 views

Microcontroller suggestion

I'm designing an analog audio amp with a 6 band analog equalizer controlled via a 7" LCD touch screen. I'm wanting to preform a real time 2048 point FFT and display it on the screen in some kind of ...
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2answers
4k views

Stellaris LM4F120 Series: What happened to it?

A while ago I got a Stellaris Launchpad for the new LM4F120 MCU but did not get around to trying it out. When I now tried accessing any information on the LM4F120 series at TI, anything related to it ...
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3answers
849 views

Interrupt when a variable passes a threshold

I am programming the code for a LM4F120 Stellaris Launchpad, and I need a method to activate a software interrupt when the value of a particular variable exceeds a predefined threshold value. When the ...
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2answers
244 views

Are there any transparent enclosures or housing options out there for the Stellaris LaunchPad?

I come from an Arduino background, where there are a number of enclosures available for the standard board sizes. We've just installed some software on a Stellaris LaunchPad at work, and we want to ...
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1answer
1k views

Cortex-M4F FPU problems

I'm writing some code for a Texas Instruments Stellaris Launchpad board (a Cortex-M4F, the chip is a LM4F120H5QR). I'm using the IRMP library for infrared decoding, which works fine, as long as I don'...
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2answers
823 views

Talking to the Cortex M3 (Stellaris EKS-LM3S1968) under linux

I've searched around quite a lot, but haven't found an easy(ish) way to load programs onto the Cortex M3 using Linux. I have tried using the summon-arm-toolchain https://github.com/esden/summon-arm-...
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1answer
522 views

Stellaris 6/8/9000 part libraries for Eagle?

Someone pointed me at the freeware version of Eagle as a good starter dev tool. So I start playing around and I can't seem to find a part library for the chips I want to use. I found a library (the ...
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1answer
279 views

Stellaris TCP/IP

I have Stellaris LM3S6965 Microcontroller from TI, and i want to run an embedded web server on it. Is it possible to achieve that without additional hardware(ethernet/serial). Thank you.
6
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1answer
2k views

License dilemma Texas Instruments Code Composer v5 for Stellaris vs MSP430

As I read the screenshot below, I have to pick the license for Texas Instruments' Code Composer Studio v5 as follows: option 4: to use with a LaunchPad MSP430 option 3: to use with a LaunchPad ...