How to name the pins?

Today, the pins are named by their number: 1 for VCC, 2 for P1.0, 7 for P1.5, 8 for P2.0, ...

Wouldn't be better to use the names from the silkscreen: P10 for P1.0, P15 for P15, P20 for P2.0, ...?

wiring_pulse.c is available only for Arduino platform at the Energia / hardware / arduino / cores / arduino folder.

pulseIn() is mentioned at line 151 of Energia / hardware / msp430 / cores / msp430 / Energia.h

unsigned long pulseIn(uint8_t pin, uint8_t state, unsigned long timeout = 1000000L);

but isn't defined elsewhere.

There's no wiring_pulse.c file or equivalent in the Energia / hardware / msp430 / cores / msp430 folder.

I tried and copied-pasted Arduino wiring_pulse.c into the msp430 folder, changed #include "pins_arduino.h" for `

include "pins_energia.h"`, but compilation raised errors, as micro-controllers are different.

Currently there only is a TimerSerial implementation at 9600bps.

The USCI can do hardware UART at upto 2Mbps.
Ideally it would be compatible with the Arduino Serial library and allow all baudrate settings for all clock frequencies.

see: http://arduino.cc/en/Reference/serial

$(version) should be stated somewhere to avoid Energia $(version) from being displayed as the title of the Energia window.

On the compiled Energia.app, $(version) is on file /Applications/Energia.app/Contents/Resources/Java/lib/version.txt

When I make a program (simple led blink and download it, it will not run. (MSP430G2553 device, 1 or 16Mhz clock tested).
Oddly, it will run when I first download a program I made with the stand-alone msp430-gcc compiler
(ubuntu linux package) using mspdebug and THEN use the energia IDE. When I download the same
program again, it will NOT run.

To recap:

1. download externally compiled program (LED bliker) with MSPdebug: OK
2. Compile and Download program with Energia: OK (runs)
3. Compile and Download same program with Energia: NOK (halts)
4. Downloading hex file same program with mspdebug, or resetting board: NOK

It seems there may be something wrong with the initialization code / clock selection (WDT timeout?)
Any ideas?

How to name the pins?

Present names give 2 for P1.0 LED1... 5 for P1.3 S2 ... 10 for P2.2

Wouldn't be better to replicate the numbers on the silkscreen? P10 P11 ... P17 and P20 ... P25

Rename /Energia/hardware/msp430/cores/arduinoto /Energia/hardware/msp430/cores/msp430 for better consistency

As at commit cc88f9e, Energia supports mps430g2231, mps430g2452 and mps430g2553.

Are other versions of MPS430 planned, as e.g. mps430g2211, mps430g2252?

I would propose two new functions in the wiring_analog.c to make optimal use of the 16bit PWM, and be able
to drive RC servos off the PWM

analogFrequency(long frequency); // Set the PWM frequency. (Note: Minimal freq. is F_CPU/8*65536), default is 490
analogResolution(short resolution); // Set the resolution in counts (0..x), default is 255.

I have modified the source to do just this, but would like some response to see if this is a appreciated feature.
It is provides additional functionality that is not available in the original arduino.

I can also wrap this in a Servo() class. But this would almost duplicate the analog output functionality.

Feedback is appreciated.

Perhaps already known, it looks like direct port manipulation is not working
in Energia 1.0

DDRD = B11111110;
give me an error sketch_apr26e.cpp:2:1: error: 'DDRD' does not name a type

const int portBit = 4;
PORTD |= (1 << portBit);

gives me an error

sketch_apr26e.cpp:4:1: error: 'PORTD' does not name a type

void loop() {
while(1) {
PORTD |= _BV(2);
PORTD &= ~_BV(2);
}
}

gives me an error

sketch_apr26e.cpp: In function 'void loop()':
sketch_apr26e.cpp:5:5: error: 'PORTD' was not declared in this scope
sketch_apr26e.cpp:5:19: error: '_BV' was not declared in this scope

The analog pin/timer definition is incorrect in pins_energia.h. Timer1 outputs are not available.

Note: due to the fact that compare register 0 is used as the PWM period, only two analog outputs are available per timer.
And OUT0.2 is not available as a pin, a maximum of 3 independent outputs are available on the 20PIN devices.

Proposed definition:

// Defines for devices with 2x TA3 timers (e.g. MSP430g2553). On the 20pin devices, upto 3 analog outputs are available
// T0A1, T1A1 and T1A2
const uint8_t digital_pin_to_timer[] = {
    NOT_ON_TIMER, /*  dummy */
    NOT_ON_TIMER, /*  1 - VCC */
    NOT_ON_TIMER, /*  2 - P1.0 */
    T0A0,         /*  3 - P1.1, note: A0 output cannot be used with analogWrite */
    T0A1,         /*  4 - P1.2 */
    NOT_ON_TIMER, /*  5 - P1.3 */
    NOT_ON_TIMER, /*  6 - P1.4, TODO: T0A2??, not on DIP20 devices according tot datasheet  */
    T0A0,         /*  7 - P1.5, note: A0 output cannot be used with analogWrite  */
    T1A0,         /*  8 - P2.0, note: A0 output cannot be used with analogWrite */
    T1A1,         /*  9 - P2.1 */
    T1A1,         /* 10 - P2.3 */
    T1A0,         /* 11 - P2.4 note: A0 output cannot be used with analogWrite  */
    T1A2,         /* 12 - P2.5 */
    T1A2,         /* 13 - P2.6 */
    T0A1,         /* 14 - P1.6 */
    NOT_ON_TIMER /* 15 - P1.7 */
//  NOT_ON_TIMER,       /* 16 - /RESET */  
// NOT_ON_TIMER,        /* 17 - TEST */  
// T1A2,                /* 18 - XOUT - P2.7 */
// NOT_ON_TIMER,        /* 18 - XIN - P2.6 */
// NOT_ON_TIMER,        /* 20 - GND */
};

The internal pull-up resistor is not activated for inputs, in a similar fashion as with the Arduino.

In the arduino, to enable the pull UP, you can write a 1 to a digital input:

pinMode(pin, INPUT); // set pin to input
digitalWrite(pin, HIGH); // turn on pullup resistors

Alternatively you can use pinMode(pin, INPUT_PULLUP);
Both methods are not implemented on energia

In the MSP430, you need to enable the resistor AND write a 1 to the input:
for SW2 on the launchpad board (P1.3):
P1REN |= 1<<3;
P1OUT |= 1<<3;

you may want to include the enabling of the corresponding P1RENbit in the pinMode() core function

The standard digital input examples are not working, because they expect an external pull-up. May want to include some launchpad specific examples (with the right switch and LED pin numbers)

bluehash, 43oh.com forum administrator, sent a kind invitation to post about the Energia project on the forum.

If possible you are free to use the Forum as support for your Energia project(in the community project section). Let me know.

Meanwhile, Rickta59 has started the thread Energia (Arduino for msp430) on 43oh.com.

Having an official thread to promote Energia could be nice.

What do you think?

Hi,

I am new to MSP430 and Energia and trying to learn.
I am using Energia build 005a right now.

I am trying to use the RTC library from TI but it is in assembler.
I have setup the files in my Sketchbook directories.
I renamed the RTC.s43 file to RTC.S.
When I try to compile my small example (just calling the libraries in fact), it end with this error :
Cannot run programm "/Applications/Energia.app/Contests/Resources/Java/hardware/tools/msp430/bin/avr-gcc": error=2, No such file or directory

It seems Energia is not calling the right compiler for assembler...

Thanks for your help.
Yan.

In the implementation of attachInterrupt(interrupt, function, mode) in file hardware/msp430/cores/msp430/WInterrupts.c the wrong bit is set in the Interrupt Edge Selection (PxIES) register.

I have a preliminary version of the CapTouch library ready but the current API might be to low level and would like your opinion on naming, level of abstraction, etc:

API:

begin()
Description: initialize the CapTouch library
Parameter: none
Return: none

add(<pin number>)
Description: Add pin to the CapTouch library
Parameter: pin number to add
Return: 0 on fail, pin is not PIN OSC capable, 1 on success

measure(<pin number>)
Description: Measure counts
Parameter: pin number to measure
Return: number of relaxation oscillator cycles (decrease if touched)

Additional API's I am thinking of. Upside is that baseline tracking could be done inside the library.

isTouched(<pin number>)
Description: Determine if the "pin" is touched.
Parameter: pin number to check
Return: true/false

isTouched()
Description: Determine which "pin" that has been added to the library is touch if any.
Parameter: none
Return: pin number being touched or -1 if none (can not use 0 for none since pin 0 could exist).

Example Sketch with current API:

#include <CapTouch.h>

#define LED_PIN 2
#define MIDDLE_BUTTON 13

unsigned int count, base_count, delta_count;
int state = 0;

static const unsigned int threshold = 150;

void setup() {
  Touch.begin();
  Touch.add(MIDDLE_BUTTON);

  base_count = Touch.measure(MIDDLE_BUTTON);

  pinMode(LED_PIN, OUTPUT);
}

void loop() {

  count = Touch.measure(MIDDLE_BUTTON);

  if(base_count < count) {
    base_count = (base_count + count) >> 1;
    delta_count = 0;
  } else {
    delta_count = base_count - count;
  }

  if(delta_count > threshold) {
    digitalWrite(LED_PIN, HIGH);
  } else {
    base_count = base_count - 1;
    digitalWrite(LED_PIN, LOW);
  }

  delay(10);
}

$ ant
Buildfile: /home/kimballr/Energia/build/build.xml

build:

revision-check:

linux-checkos:

subprojects-build:

compile:
[methods] No changes to PApplet API.

build:

compile:
[copy] Copying 1 file to /home/kimballr/Energia/app/bin
[copy] Copying /home/kimballr/Energia/app/src/processing/app/Resources_ja.properties to /home/kimballr/Energia/app/bin/processing/app/Resources_ja.properties

build:
[jar] Building jar: /home/kimballr/Energia/app/pde.jar

linux-build:
[copy] Copying 1 file to /home/kimballr/Energia/build/linux/work/lib

assemble:
[unzip] Expanding: /home/kimballr/Energia/build/shared/reference.zip into /home/kimballr/Energia/build/linux/work

BUILD FAILED
/home/kimballr/Energia/build/build.xml:35: The following error occurred while executing this line:
/home/kimballr/Energia/build/build.xml:355: Warning: Could not find file /home/kimballr/Energia/build/linux/dist/energia to copy.

Total time: 2 seconds
$

Compiled example and tried to upload. Fails saying it can't find the file. However if I copy the
command and paste into a terminal window, it finds the file and uploads it properly.

--- verbose output from IDE ---

 [exec] Binary sketch size: 934 bytes (of a 16,384 byte maximum)
 [exec] /home/kimballr/Energia/hardware/msp430/cores/msp430/wiring.c: In function 'initClocks':
 [exec] /home/kimballr/Energia/hardware/msp430/cores/msp430/wiring.c:74:9: note: #pragma message: Clock set to 16MHz
 [exec] Binary sketch size: 934 bytes (of a 16,384 byte maximum)
 [exec] /home/kimballr/Energia/build/linux/work/hardware/tools/msp430/mspdebug/mspdebug rf2500 --force-reset "prog /tmp/build1067378422286941846.tmp/TimerSerialExample.cpp.hex" 
 [exec] MSPDebug version 0.19 - debugging tool for MSP430 MCUs
 [exec] Copyright (C) 2009-2012 Daniel Beer <[email protected]>
 [exec] This is free software; see the source for copying conditions.  There is NO
 [exec] warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 [exec] 
 [exec] Trying to open interface 1 on 012
 [exec] rf2500: warning: can't detach kernel driver: No data available
 [exec] Initializing FET...
 [exec] FET protocol version is 30066536
 [exec] Configured for Spy-Bi-Wire
 [exec] Sending reset...
 [exec] Set Vcc: 3000 mV
 [exec] Device ID: 0x2553
 [exec]   Code start address: 0xc000
 [exec]   Code size         : 16384 byte = 16 kb
 [exec]   RAM  start address: 0x200
 [exec]   RAM  end   address: 0x3ff
 [exec]   RAM  size         : 512 byte = 0 kb
 [exec] Device: MSP430G2553
 [exec] Code memory starts at 0xc000
 [exec] Number of breakpoints: 2
 [exec] prog: /tmp/build1067378422286941846.tmp/TimerSerialExample.cpp.hex : No such file or directory

Timer based UART is broken. Only single char send/receive works. Multiple characters send/receive result in garbage or crash.

msp430g2231 does not compile. Fails in analogWrite.

There is a MIDI library for the Arduino. I have a use for it on the MSP430.

See: http://arduino.cc/playground/Main/MIDILibrary

It almost works out of the box (with the Hardware serial) but you need to set some smaller buffer sizes due to RAM constraints

• #define MIDI_SYSEX_ARRAY_SIZE 256
• #define MIDI_SYSEX_ARRAY_SIZE 1 // can be larger, e.g. 16 bytes if you have some RAM left

Also

include "Arduino.h"

should be commented out. (Arduino.h could be mapped to Energia.h on a global level to be more Arduino compatible)

Is it a plan to include it as lib in Energia?

I2C Slave is not implemented yet.

Please follow Arduino guidelines for code compatibility.

Does not seem to work for me. mills() always returns 0.
millis() depends on a WDT running in continuous mode but the WDT is never enabled anywhere there that in delay().

There seems to be a problem using the serial debug window in linux. After you use it,
Energia becomes slow (10 seconds response time when clicking some window or menu). Removing the
USB connection makes it work OK again, but plugging in the launchpad makes it slow again.

May be a problem in serial port detection code.

Note: this problem occurs only after doing a download. If you do not do a download, it works OK.
Could be buggy CDC implementation in the launchpad USB firmware.

The flash programmer does not work under MAC OSX.
It reports:

rf2500: can't claim interface: Permission denied
rf2500: failed to open RF2500 device

It seems you need a "codeless kernel extension" that is not included in the distribution
See:

http://www.senslab.info/2010/11/installing-the-msp430-toolchain-under-mac-os-x/
https://github.com/colossaldynamics/ez430rf2500

I was not able to get it work under MAC OSX Lion 10.7 (64 bit)

Also, CDC driver is not included in MAC (Launchpad CDC is not compliant with spec)
May need patched driver, like http://code.google.com/p/msp430lpcdc/
(include in dist?)

Relocate TimerSerial.[h/cpp] from hardware/msp430/cores/msp430 to hardware/msp430/libraries

Energia icon is still Arduino.

The menu's Sketch->Import LIbrary... and File->Examples point to the Arduino /libraries directory instead of the msp430 /hardware/msp430/libraries directory when switching to an msp430 based board for the first time (possibly first run only).

Each version of the MSP430 has specific features.

For example, HardwareSerial requires a msp430g2553.

Compiling a sketch using serial for a msp430g2452 fails, but the error messages don't point out the msp430g2452 doesn't support serial port.

/Applications/Energia.app/Contents/Resources/Java/hardware/msp430/cores/msp430/wiring.c: In function 'initClocks':
/Applications/Energia.app/Contents/Resources/Java/hardware/msp430/cores/msp430/wiring.c:74:9: note: #pragma message: Clock set to 16MHz
sketch_apr10a.cpp.o: In function `setup':
sketch_apr10a.cpp:5: undefined reference to `Serial'
sketch_apr10a.cpp:5: undefined reference to `HardwareSerial::begin(unsigned long)'
sketch_apr10a.cpp:6: undefined reference to `Serial'
collect2: ld returned 1 exit status

HardwareSerial checks for __MSP430_HAS_USCI_ which is missing a _.

analogWrite needs to be implemented.

To be consistent, pins_arduino.h needs to be renamed to pins_energia.h

By default, Energia uses /Users/OlS/Library/Arduino/to save preferences.txt.

In order to avoid any interference with Arduino, preferences.txtshould be stored in the specific folder /Users/OlS/Library/Energia/.

Errors are print in same color as the rest of the (informative) output.
How to reproduce:

1: enable "Show verbose output during compilation" in the preferences.
2: Make an intentional error in the sketch.
3: Hit verify.

analogRead(...) returns wrong and erratic values for internal temperature sensor.

The file build/shared/lib/preferences.txt needs to be changed to default to an msp430 based board.

After a first look inside Energia.app,

• 1

File /Applications/Energia.app/Contents/Resources/Java/hardware/msp430/cores/msp430/Arduino.hcontains MPS430-specific code like #include "msp430.h".

To improve clarity, could file /Applications/Energia.app/Contents/Resources/Java/hardware/msp430/cores/msp430/Arduino.hbe renamed /Applications/Energia.app/Contents/Resources/Java/hardware/msp430/cores/msp430/MSP430.h?

• 2

File /Applications/Energia.app/Contents/Resources/Java/hardware/msp430/cores/msp430/main.cpp includes MSP430-specific code like WDTCTL = WDTPW | WDTHOLD; //!!!!!!!!!!!and __bis_SR_register(GIE);.

To be consistent with other Processing-based IDEs —especially for the rei-vilo/embedXcode project—, could this specific code from •2 main.cpp be transferred to •1 MSP430.h?

Hi am I correct if I claim that p2.6 (pin 18) and P2.7 (pin 19) van not be used as digital pins on 20 pin devices?
If so, is there any particular reason for this?

Would it be an idea to make variables in the source code for the name of the compiler, linker, downloader and its options.
They are hard-coded at several places in the source, and this makes maintaining and porting the code difficult.

If the defaults for these variables can be overridden in the" boards.txt" and "programmers.txt" file a different platform would NOT need a different version of energia (e.g. if the compiler prefix is "arm-none-eabi-" instead of "msp430-" you can use a ARM cpu (that is, in theory).

board.txt:
xxx.build.compiler="msp430-"
xxx.build.c="gcc -c $src -o $target -Os .... other flags....."
xxx.build.cpp="g++ ......."
xxx.build.s="gcc....."
xxx.build.ld="ld...."
etc.

programmers.txt
xxx.program=mspdebug rf2500 "prog $name"

It seems that baudrates above 9600 do not work correctly.
Verified with loopback program on Ubuntu linux:

void setup() { Serial.begin(19200); }
void loop() {
if (Serial.available()) {
char inByte = Serial.read();
Serial.write(inByte);
}
}
9600 bps and lower works,
But higher and you get junk.

Some characters seem to be looped back OK, some not.
Maybe timing is just a bit off.

Compiling the following code with a msp430g2553 target

void setup() {
  Serial.begin(9600);
  Serial.print("\n\n\n***\n");
}

void loop() {
  Serial.print(".");
  delay(333);
}

results in error

/Applications/Energia.app/Contents/Resources/Java/hardware/msp430/cores/msp430/wiring.c: In function 'initClocks':
/Applications/Energia.app/Contents/Resources/Java/hardware/msp430/cores/msp430/wiring.c:74:9: note: #pragma message: Clock set to 16MHz
core.a(main.cpp.o): In function `main':
/Applications/Energia.app/Contents/Resources/Java/hardware/msp430/cores/msp430/main.cpp:7: undefined reference to `setup'
/Applications/Energia.app/Contents/Resources/Java/hardware/msp430/cores/msp430/main.cpp:10: undefined reference to `loop'
collect2: ld returned 1 exit status

while embedXcode succeeds based on the same Energia release cc88f9e.

The launchpad MSP430 serial driver installer is not included in the windows distribution.
Include it in the "Driver" directory (where all the arduino and FTDI drivers are installed) or another directory?

Which repository does the Energia project relies on?

• 0023 = Arduino 0023, Wiring 1.0, chipKIT MPIDE 0023
• 1.0 = Arduino 1.0

Differences between 0023 and 1.0 aren't very important but unfortunately rather subtle.

Wiring provides a wider set of standard libraries -e.g. vector.h- so it could be a wise decision for Energia to stick on Wiring compliance.

For more about Wiring/Arduino, please refer to Is Wiring 1.0 build 100 Arduino 1.0 compliant?

Apart from the standard examples as blinking LED, I2C device and serial port, having examples specific to the MSP430 would be nice:

• MSP430 built-in thermometer
• Capacitive Touch BoosterPack

Default settings and sketch folder are harcoded to Arduino in Platform.java
macosx Platform.java
windows Platform.java
linux Platform.java

The examples are tuned for arduino hardware.
To make them work on the launchpad the PIN numbers for the outputs need to be modified
to reflect the hardware (e.g. use GREEN_LED or RED_LED).

If the example cannot work at all on the launchpad, I would remove the example completely.

IconImage is still arduino in core/src/processing/core/PApplet.java ICON_IMAGE

Based on Robert's comment on issue #39, is there a way to define priorities to rank the features to add?

For example, slave I2C might be considered as important because of its low-level hardware dependencies, while other higher level libraries rely on hardware-independent libraries and thus could be ported to the LaunchPad platform by contributors who don't have a solid background on MSP430, freeing those precious resources for the former case.

What do you think?

As the default compiler location for mspgcc is /opt/mspgcc, you may want to include this search path in the
energia startup script:

export PATH=$PATH:/opt/mspgcc/bin

(if the compiler is already in the standard search path, this won't hurt).

I would like to implement RC servo output (1 to 2 msec output signal, with 10 to 40 msec period).

• A simple SW implementation is trivial (digitalWrite+delayMicroseconds) but not optimal.
• Using the timer is better. The analogWrite function does this already, but the period is fixed to 490 Hz. And just a few pins
• Implementing a timer ISR to set/reset the digital pins is more flexible for more servos (using 1 timer for multiple servos) but
  less optimal in CPU/Energy.

I would like to use the analog_write function, but then I need to make the fixed period adjustable (from a define to a variable).
An extra function is defined to set this frequency.