CCS/MSP430FR2155: Float variable read-write in Flash memory

Hi, Sandhya, 

CCS MSP430 compiler and IAR MSP430 compiler support 32bits "float" data type. You can define the variable as float data type directly. 

For the flash memory variable, I think you are going to write and read variable in FRAM non-volatile memory, right? For this, there is a code example "msp430fr235x_framwrite_persistent.c" in MSP430FR235x, MSP430FR215x Code Examples (Rev. B)  You can refer to it for the FRAM variables definition and read/write. For quick definition for the float variable in FRAM memory, I have an example: 

// Statically-initialized variable
#ifdef __TI_COMPILER_VERSION__
#pragma PERSISTENT(Variable_Name)
float long Variable_Name = 0.0;                              // Note: Persistent variable needs a initial value
#elif __IAR_SYSTEMS_ICC__
__persistent float Variable_Name = 0.0;                 // Note: Persistent variable needs a initial value
#else
// Port the following variable to an equivalent persistent functionality for the specific compiler being used
float Variable_Name = 0.0;
#endif

Then you can use the defined variable Variable_Name to read and write in your code. 

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Best Regards, 

Lixin 

Thanks for reply Lixin,

I have tried my code with your referred code and Now I can read and write float value in FRAM.

Thanks,

Sandhya Yadav