Bulk erase bootloader command via SPI

[mkruger]

Posted on November 17, 2009 at 16:28

Bulk erase bootloader command via SPI

[mkruger]

Posted on May 17, 2011 at 15:05

STM8S105C6

I am trying to bulk erase the part via SPI using the precompiled bootloader write/erase routines provided by ST. I am able to write memory locations without issue, so I am fairly certain the SPI transactions are properly set up (though there is always room for error). Here is the code:

{

tUBYTE Request[4];

tUBYTE Response[4];

tUBYTE AckByte[2];

Request[0] = 0x7F;//SYNCHR Byte

Request[1] = 0x80;//NSYNCHR Byte

DigitalOutSetDigitalState(dHAL_DO_RESET_SECOND_MICRO, dINACTIVE);

SleepMs(10);

DigitalOutSetDigitalState(dHAL_DO_RESET_SECOND_MICRO, dACTIVE);

SleepMs(5);

SpiTransaction(&Request[0], &Response[0], 2); // Put ST into boot mode

Request[0] = 0x43; // Erase command

Request[1] = 0xBC; // compliment

SpiTransaction(&Request[0], &Response[0], 2); // 2 bytes sent

SpiTransaction(&AckByte[0], &AckByte[0], 1); // 1 byte sent

if(AckByte[0] == 0x79) // ASCII 'y'

{

Request[2] = 0xFF; // Total erase code

Request[3] = 0x00; // compliment

SpiTransaction(&Request[2], &Response[2], 2); // 2 bytes sent

SleepMs(500); // 500 millisecond delay

SpiTransaction(&AckByte[1], &AckByte[1], 1); // 1 byte sent

if(AckByte[1] == 0x79) // ASCII 'y'

return(eTRUE); // Success

}

return(eFALSE); // Failure

}

I receive the ACK after the 500ms delay but when I cycle power, the application code has not been erased. Anyone see any glaringly obvious mistakes?

[mkruger]

Posted on May 17, 2011 at 15:05

*Comic slap to the forehead*

Argh. Order of operations issue. Should probably load the bootloader write/erase routines prior to trying to erase something. Duh! I need more sleep apparently.