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Showing results for tags 'Rs232'.
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devdibyo posted a topic in GeneralHi , I am interfacing MSP430F5529 and SIM900A using energia software. I have tried the code using Arduino Uno before and it seemed to work fine. However when I try the same with msp430 , there is no output on the serial monitor. Few days back I came to know that there is a voltage mismatch between the msp430 output and sim900 input and as suggested by few members of the thread , I am supposed to use a voltage translator to convert the 3.3V output of the Msp430 board and then apply it to sim900A module. They recommended Rs232 for this purpose . I want to know the connection that'll be required to made in order to translate the voltage of the msp430. Where do I connect the rs232 cable and where do I apply it's output voltage ? Thank you .
Hi experts!! I'm a beginner and working on CC3200 LP along with Energia IDE. I'm working on a simple project where I've an external device which has RS485 o/p and I need to fetch the values in specified addr location in that device to CC3200 LP. My doubts are #1) we have external module that has device ID+parameter Address and we need to transmit the value in LP through UART, here I'm not sure how to use the UART function to specifically target device+address and return/get the same.... #2) what I'm looking/exploring is that in above example (UART code which Andy shared here ) what function specifically reads DeviceID+parameter Addr and returns that string value to my LP My experiments: I've been checking uart.h file and following lines looks close to what I need to do - but not sure... extern void UARTConfigSetExpClk(unsigned long ulBase, unsigned long ulUARTClk, unsigned long ulBaud, unsigned long ulConfig); extern void UARTConfigGetExpClk(unsigned long ulBase, unsigned long ulUARTClk, unsigned long *pulBaud, unsigned long *pulConfig); I'm planning to have my framework Energia sketch might be like calling below functions in specified order 1) UARTIntClear ==> to initialize/clear in LP 2) UARTIntEnable ==> enable UART of my LP 3) UARTConfigSetExpClk ==> to set what I need to read from the external device to my LP 4) UARTConfigGetExpClk ==> to GET what I need to read from the external device to my LP 5) perform step 1 to 4 after 5 sec ==> loop it Am I missing something in above flow?? My Setup I've installed Tera Term in my PC to monitor com port I've got Rs485 to RS232/TTL converter which can be connected to my cc3200 LP UART PIN_02, PIN_01 (RX_1 & TX_1) ... or nay other UART pin which is applicable. my external device which has RS485 o/p ==> Baud rate of 9600, Parity = Even, Device Address = 1, Stop bit = 1, Data type = 32 bit float real, Data to be red from address (Float) 3913, 3909, 3903, 3965, please advice