Dspic33fj12mc202: FLASH Self Write Question

Semiconductor Integrated Circuits (ICs)
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1

From: FLASH Self Write Microchip dsPIC33F, PIC24H

Hi sir, I tested the file…its working…I want to change parameter individually…when I write parameter[1]
All parameter is changing…but parameter[1] value is same what I have written …but other value is changing…can you help me…

2

Hi @aaneesh444 which mcu are you using? Can you share what you changed? and what you want to do…

Please use code blocks (```) pre and post text:

code block

Regards,

7

When looking at Kevin’s posted code: (programParameters), it is specifically tuned for 3 integers, did you extend this code when you changed it to an array of 8?

/********************************************************************************
 *  programParameters()
 *
 *  Prototype: int programParameters(unsigned int, unsigned int, unsigned int)
 *  Passed arguments: unsigned int param1, unsigned int param2, unsigned int param3
 *  Return value: none
 *  Dependencies: INTERRUPTS MUST be DISABLED prior to calling this routine.
 *
 *  Description:  Erase block of NVM and write data to FLASH memory
 ********************************************************************************/
void programParameters(unsigned int param1, unsigned int param2, unsigned int param3)
{
    unsigned int tbloffset;
 
    //Erase one page of FLASH memory
    NVMCON = 0x4042;   // Setup NVMCON for Block Erase operation (512 instructions)
    TBLPAG = __builtin_tblpage(&iParameters[0]);  // Load upper FLASH address
    tbloffset = __builtin_tbloffset(&iParameters[0]);  // Offset within page
    __builtin_tblwtl(tbloffset, 0xFFFF);  // Dummy write to select the page
    FLASHWrite();        // low level erase/write command sequence
 
    // write single word, param1, to FLASH
    // In this case the Page hasn't changed so don't have to load the table
    // page register again.
    tbloffset = __builtin_tbloffset(&iParameters[0]);  // offset within page
    __builtin_tblwtl(tbloffset, param1);  // load the write buffer
    NVMCON = 0x4003;     // Setup NVMCON for Single Word Write operation
    FLASHWrite();        // low level erase/write command sequence
 
    // write single word, param2, to FLASH
    tbloffset = __builtin_tbloffset(&iParameters[1]);  // offset within page
    __builtin_tblwtl(tbloffset, param2);  // load the write buffer
    NVMCON = 0x4003;     // Setup NVMCON for Single Word Write operation
    FLASHWrite();        // low level erase/write command sequence
 
    // write single word, param3, to FLASH
    tbloffset = __builtin_tbloffset(&iParameters[2]);  // offset within page
    __builtin_tblwtl(tbloffset, param3);  // load the write buffer
    NVMCON = 0x4003;     // Setup NVMCON for Single Word Write operation
    FLASHWrite();        // low level erase/write command sequence
 
    return;
}