DeepakJ 0 Posted June 24, 2014 Share Posted June 24, 2014 Hai I'm a complete newbie to Energia and MSP430. I would like to get some help on a problem that I'm facing while interfacing MSP430 launchpad using I2C(it's not "a" problem, rather it is "THE" problem).As mentioned above I'm using a MSP430-g2553 launchpad ver1.5 and currently I'm working on a project that requires interfacing two MSP430s with a Raspberry Pi. The protocol that I've chose is I2C due to it's simple hardware requirement and it's support for many devices at the same time. But then till now interfacing two MSP430s has been a faliture. I tried interfacing two MSPs on two launchpads. I've used the programs given as the example under the Wire menu (both the master sender-slave reciever and the master reciever-slave sender) and also another one that I've used with arduinos. I've tried connecting the two MSPs on the launchpads directly without pullups, with pullups on SCL line, SDA line and also with pullups on both the lines but in vain. And yes I've connected the ground pins of both the launchpads together. Again yes, both the boards with the MSPs work fine with normal i/o programs, pwm programs and serial communication programs(with the computer).Also I tried to connect each MSP to a Raspberry Pi and to a bus pirate(both of them working perfectly with an arduino), with negetive results.Had I missed something that I should've done..? Or am I doing something that is absolute stupid...? There are a couple of jumpers on the launchpad like RX,TX,test etc etc. Should I do something with them(based on my readings what I've understood is that they are used in the case of serial communication and not I2C). If anyone has interfaced MSPs together, please if you can help, it would be great. Anything like hints, tips, suggestions, advice etc etc(negetive or positive), anything, would be highly appriciated. Thanks in advance Quote Link to post Share on other sites
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