brelliott18
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Posts posted by brelliott18
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SUCCESS !
using Mods as above plus twi.c and twi.sw.c from this link :-
http://e2e.ti.com/support/development_tools/code_composer_studio/f/81/p/529036/1924562#1924562
plus adding :-
Wire.setModule (0) before Wire.begin() in Void Setup() in both Master and Slave :-
I have managed to send two characters from the Master to turn off the Red Led in a loop on the Slave.
BIG Thanks again to B@TTO.
Wouldn't it be perhaps a good idea if these files were updated and placed in the Energia GitHub Repository ? How is this process carried out ?
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It appears the latest twi.c file from GITHUB does NOT appear to incorporate B@TTO modifications:-
This is my understanding of the mods required noted by //********************
Is this correct ?
[ If so , it would seem a good idea for ENERGIA to update this file, surely ?? - How does one get this to happen ? ]
[ The other code needed is to insert Wire.setModule(0) before Wire.begin , so I'm told ]
****************LATEST TWI.C [ FROM LINE 839 ] ****************************
/* Slave transmit mode (twi_state = TWI_STX) */
}
else { // ***** REPLACE WITH else if ( twi_state == TWI_STX ) {
// copy data to output register
UCBxTXBUF = twi_txBuffer[twi_txBufferIndex++];
// if there is more to send, ack, otherwise nack
if(twi_txBufferIndex < twi_txBufferLength){
} else {
UCBxCTL1 |= UCTXNACK; // Generate NACK condition }
}
// ************************PLUS ****************
} else {
if (twi_sendStop) {
/* All done. Generate STOP condition and IDLE */
UCBxCTL1 |= UCTXSTP;
// ********************* ADD UCxIFG &= ~ UCB0TXIFG ;
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Replaced files - Makes no difference.
Ran your program to return addresses of serial devices - after removing ' Wire.setModule(0) ' line which crashes it.
The program returned a continuous stream of addresses from 0 to 127 - Is this a sign that the MSP430 itself cannot act as slave because it doesn't recognise any addresses ( not even ' 0 ' ) , perhaps ?
Regards
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Not yet - will give it a try - THANKS !!!
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Thanks for the reply
Yes, I have. The point is that identical code on the Arduinos works but not on MSP430s
So either the delays need changing ? - I'm using 3 seconds on the MASTER between begin and end transmissions and about 0.5 second on the SLAVE - I have changed these but it doesn't seem to a make any difference.
OR : Perhaps the Registers are not being set up correctly but that's a pure guess.
PS I can't the C language - I'd like to do everything in Forth in possible.
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Latest : Have used exactly the same code with ARDUINOs UNO and NANO instead of 2 X MSP430 2553 [ used Version 17 of Energia for MSP devices ].......
..............The code WORKS on these ARDUINO devices !!!
[ I simply send 'H' and ' L' chars to turn LED on / off using Wire.begin then Wire.beginTransmission then Wire.endTransmission plus delays for MASTER .
For SLAVE ( another MSP430 2553 ) I use Wire.onReceive( receiveEvent) then VOID receiveEvent ( int howMany) then ' while Wire.available and Wire.Read ' etc. ]
Use 4K7 pull ups on p1.7 , P1.6 plus Common Ground.
I assume, perhaps, that the Registers are not being Set up properly ? - Have also noticed that there are NO examples on YouTube as opposed to the ARDUINO.
Has anyone ever managed to connect 2 MSP430 via I2C , I wonder ?
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Hi @@brelliott18,
There are some known problems with i2c on 2553 Launchpads, mentioned in various posts over this forum.
One of them is mentioned in http://forum.43oh.com/topic/2641-i2c-lcd/page-2#entry75927; in this post is also a link to a solution http://e2e.ti.com/support/development_tools/code_composer_studio/f/81/p/529036/1924562#1924562
Have you already seen this posts? Have you tried the solutions presented in them?
Regards,
Liviu
Thanks for the advice. Have inserted ' Wire.setModule(0) as suggested - This just seems to prevent begin and end transmission loops working altogether. One problem seems to be waveforms coming from SDA / SCL - either not present or very noisy.
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PS I have removed GREEN LED P1.6 link !
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Trying to use I2C to connect 2 X MSP430.
Using Wire.write ('H') and 'L ' char to send to Slave via 4K7 pull-ups to turn on / off slave led.
Using Wire.onReceive(receiveEvent) , void receiveEvent ( int howMany ) etc.
Have added delays at various places.
Have programmed then removed PC connections, use separate PSU
ReceiveEvent appears not to work.
Have old analogue scope - clock /data signals appear to be ' very dirty ' and ' noisy '
Change to 10K pull ups ? Any suggestions ? Thanks
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I found this information previously but the reference to the camera device led nowhere.
Thanks anyway
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Any news on this ? - can't seem to find it if it exists
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Solved - thanks for help anyway. Thought I could use P1_1 and P1_2 but couldn't - used P1_3 upwards then P2 instead - works fine !
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This is part of the Arduino code I found for keypads [ keyboard.h ]. How should ths be altered [ if necessary ] to run on the MSP430G2553 ?
Assuming I use p1.0 to p1.7 ??? for the 8 wires coming from the keypad [ 4 X 4 ]
#define INPUT_PULLUP 0x2 - does this need changing ?
#ifndef INPUT_PULLUP
#warning "Using pinMode() INPUT_PULLUP AVR emulation"
#define INPUT_PULLUP 0x2
#define pinMode(_pin, _mode) _mypinMode(_pin, _mode)
#define _mypinMode(_pin, _mode) \
do { \
if(_mode == INPUT_PULLUP) \
pinMode(_pin, INPUT); \
digitalWrite(_pin, 1); \
if(_mode != INPUT_PULLUP) \
pinMode(_pin, _mode); \
}while(0)
#endif
#define OPEN LOW
#define CLOSED HIGH
typedef char KeypadEvent;
typedef unsigned int uint;
typedef unsigned long ulong;
typedef struct {
byte rows;
byte columns;
} KeypadSize;
#define LIST_MAX 10 // Max number of keys on the active list.
#define MAPSIZE 10 // MAPSIZE is the number of rows (times 16 columns)
#define makeKeymap(x) ((char*)x)
//class Keypad : public Key, public HAL_obj {
class Keypad : public Key {
public:
Keypad(char *userKeymap, byte *row, byte *col, byte numRows, byte numCols);
virtual void pin_mode(byte pinNum, byte mode) { pinMode(pinNum, mode); }
virtual void pin_write(byte pinNum, boolean level) { digitalWrite(pinNum, level); }
virtual int pin_read(byte pinNum) { return digitalRead(pinNum); }
uint bitMap[MAPSIZE]; // 10 row x 16 column array of bits. Except Due which has 32 columns.
Key key[list_MAX];
unsigned long holdTimer;
char getKey();
bool getKeys();
KeyState getState();
void begin(char *userKeymap);
bool isPressed(char keyChar);
void setDebounceTime(uint);
void setHoldTime(uint);
void addEventListener(void (*listener)(char));
int findInList(char keyChar);
int findInList(int keyCode);
char waitForKey();
bool keyStateChanged();
byte numKeys();
private:
unsigned long startTime;
char *keymap;
byte *rowPins;
byte *columnPins;
KeypadSize sizeKpd;
uint debounceTime;
uint holdTime;
bool single_key;
void scanKeys();
bool updateList();
void nextKeyState(byte n, boolean button);
void transitionTo(byte n, KeyState nextState);
void (*keypadEventListener)(char);
};
#endif
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You didn't "search" very hard.
You didn't "search" very hard.
So where is this information for the Msp430G2553 [ NOT the Arduino - Those didn't work ] ?
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I have recently bought a LaunchPad 2553. I am a comparitive novice.
I am trying to add a 4 X 4 matrix keypad. I copied some code from an Arduino source and changed #Arduino references to #Energia. I commented out a #WProgram statement - what is this ?
The code compiled and verified OK . I connected the 8 wires from keypad to p1.0 -p1.7 [ and tried other ports as well ].
The output was sent to the Serial monitor via Serial.println( key ). I could only get any output by pressing many keys at the same time.
I looked at the keyboard.h file but it went nothing to me. How do the DigitalReads get initiated ?
[ Serial.println ("hello world " ) worked so the program does get to the right place ]
Any suggestions please - pointers to existing code snippets - I can't fine any . Thanks
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Have just started with MSP430G2553.
Downloaded 0101E0013 correctly but I am missing the FIRMATA examples /code.
Any suggestions ?
Thanks
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Looks great ! Where / when can I get one in the UK ?
Trouble Energia 17 Windows 10 msp430g2
in Energia - MSP
Posted
I've noticed the same problem. It's intermittent which makes it even more annoying.
WINDOWS 10 is a disaster in other areas as well eg old Kindle software. I only got WINDOWS 10 because my Windows 7 machine decided to load itself with Windows 10 whilst the machine was unattended. Luckily I still have another system with Windows 7. I also have an XP system - Why this Operating system needed changing I do not know - Oh , yes I do - MONEY .