Original question:
Tool/software:
I am writing some code to allow the UCD3138128A to be programmed though a serial port.
The question I have is
What do I have to do to make the boot code recognize an image in blocks 2 and 3 to switch too when it boots up.
And then.. how to I get it to switch to blocks 0 and 1 again when I program those with a newer image?
Hello BatMan,
The UCD3138FW-BIDI has an example of clearing blocks 0 - 3 on the UCD3138128.
main.c in BiDirection_DC-DC_UCD3138128 has a clear_integrity_word() (line 110) function that clears block 0 - 3 based on the argument.
#if (UCD3138128 ) #ifdef MEMORY_SCRUBBING clear_integrity_word(1); // erase 8-byte checksum @ end of pflash block 1 //clear_integrity_word(3); // erase 8-byte checksum @ end of pflash block 3 reset_uP(); #else clear_integrity_word(0); #endif
software_interrupt_wrapper.c shows that clear_integrity_word() triggers software interrupt case 12 (line 95).
void clear_integrity_word(Uint32 block)
{
swi_single_entry(block,0,0,12);
}
interrupts.c contains the software interrupt handler. In case 12 (line 163), the code clears the program flash block by clearing the corresponding user checksum.
case 12: // clear integrity words, depending on arg1
#if (UCD3138128)
//Note: This clear integrity word covers all cases. It is designed to clear integrity words based on what address the flash block is
//mapped to when it is called. This is done for code which switches blocks. And it can erase the integrity word at the end of each of 4 blocks.
//
//For most applications, it can be simplified considerably if code space is scarce
//
//
{
register Uint32 * program_index = (Uint32 *) program_area; //store destination address for program
register Uint32 * source_index = (Uint32 *) zero_out_integrity_double_word; //Used for source address of PFLASH;
register Uint32 counter;
if(arg1 == 0) //0 means first block in memory, regardless of which block that is;
{
zoiw_address = 0x7ff8;
if((DecRegs.MFBALR1.bit.ADDRESS == 0) && (DecRegs.MFBAHR1.bit.ADDRESS == 0)) //here if flash block 0 is at 0
{
zoiw_flash_key = PROGRAM_FLASH0_INTERLOCK_KEY;
}
else if((DecRegs.MFBALR17.bit.ADDRESS == 0) && (DecRegs.MFBAHR17.bit.ADDRESS == 0))//if it's program flash 1;
{
zoiw_flash_key = PROGRAM_FLASH1_INTERLOCK_KEY;
}
else if((DecRegs.MFBALR18.bit.ADDRESS == 0) && (DecRegs.MFBAHR18.bit.ADDRESS == 0))//if it's program flash 2;
{
zoiw_flash_key = PROGRAM_FLASH2_INTERLOCK_KEY;
}
else if((DecRegs.MFBALR19.bit.ADDRESS == 0) && (DecRegs.MFBAHR19.bit.ADDRESS == 0))//if it's program flash 3;
{
zoiw_flash_key = PROGRAM_FLASH3_INTERLOCK_KEY;
}
else
{
return;
}
}
else if(arg1 == 1)//1 means end of second block;
{
zoiw_address = 0xfff8;
if((DecRegs.MFBALR1.bit.ADDRESS == 0x20) && (DecRegs.MFBAHR1.bit.ADDRESS == 0)) //here if flash block 0 is at 0x8000
//note that the address bits start at bit 10, so 0x20 in the address field equals 0x8000
{
zoiw_flash_key = PROGRAM_FLASH0_INTERLOCK_KEY;
}
else if((DecRegs.MFBALR17.bit.ADDRESS == 0x20) && (DecRegs.MFBAHR17.bit.ADDRESS == 0))//if it's program flash 1;
{
zoiw_flash_key = PROGRAM_FLASH1_INTERLOCK_KEY;
}
else if((DecRegs.MFBALR18.bit.ADDRESS == 0x20) && (DecRegs.MFBAHR18.bit.ADDRESS == 0))//if it's program flash 2;
{
zoiw_flash_key = PROGRAM_FLASH2_INTERLOCK_KEY;
}
else if((DecRegs.MFBALR19.bit.ADDRESS == 0x20) && (DecRegs.MFBAHR19.bit.ADDRESS == 0))//if it's program flash 3;
{
zoiw_flash_key = PROGRAM_FLASH3_INTERLOCK_KEY;
}
else
{
return;
}
}
else if(arg1 == 2) //2 means end of third block in memory, regardless of which block that is;
{
zoiw_address = 0x17ff8;
if((DecRegs.MFBALR1.bit.ADDRESS == 0) && (DecRegs.MFBAHR1.bit.ADDRESS == 1)) //here if flash block 0 is at 0x10000
{
zoiw_flash_key = PROGRAM_FLASH0_INTERLOCK_KEY;
}
else if((DecRegs.MFBALR17.bit.ADDRESS == 0) && (DecRegs.MFBAHR17.bit.ADDRESS == 1))//if it's program flash 1;
{
zoiw_flash_key = PROGRAM_FLASH1_INTERLOCK_KEY;
}
else if((DecRegs.MFBALR18.bit.ADDRESS == 0) && (DecRegs.MFBAHR18.bit.ADDRESS == 1))//if it's program flash 2;
{
zoiw_flash_key = PROGRAM_FLASH2_INTERLOCK_KEY;
}
else if((DecRegs.MFBALR19.bit.ADDRESS == 0) && (DecRegs.MFBAHR19.bit.ADDRESS == 1))//if it's program flash 3;
{
zoiw_flash_key = PROGRAM_FLASH3_INTERLOCK_KEY;
}
else
{
return;
}
}
else if(arg1 == 3)//2 means end of fourth block;
{
zoiw_address = 0x1fff8;
if((DecRegs.MFBALR1.bit.ADDRESS == 0x20) && (DecRegs.MFBAHR1.bit.ADDRESS == 1)) //here if flash block 0 is at 0x18000
//note that the address bits start at bit 10, so 0x20 in the address field equals 0x8000
{
zoiw_flash_key = PROGRAM_FLASH0_INTERLOCK_KEY;
}
else if((DecRegs.MFBALR17.bit.ADDRESS == 0x20) && (DecRegs.MFBAHR17.bit.ADDRESS == 1))//if it's program flash 1;
{
zoiw_flash_key = PROGRAM_FLASH1_INTERLOCK_KEY;
}
else if((DecRegs.MFBALR18.bit.ADDRESS == 0x20) && (DecRegs.MFBAHR18.bit.ADDRESS == 1))//if it's program flash 2;
{
zoiw_flash_key = PROGRAM_FLASH2_INTERLOCK_KEY;
}
else if((DecRegs.MFBALR19.bit.ADDRESS == 0x20) && (DecRegs.MFBAHR19.bit.ADDRESS == 1))//if it's program flash 3;
{
zoiw_flash_key = PROGRAM_FLASH3_INTERLOCK_KEY;
}
else
{
return;
}
}
else
{
return; //reject other arg1 values
}
for(counter=0; counter < 32; counter++) //Copy program from PFLASH to RAM
{
*(program_index++)=*(source_index++);
}
DecRegs.MFBALR1.bit.RONLY = 0; //enable program flash 1 write
DecRegs.MFBALR17.bit.RONLY = 0; //enable program flash 2 write
{
register FUNC_PTR func_ptr;
func_ptr=(FUNC_PTR)program_area; //Set function to program area
func_ptr();
} //execute erase checksum
DecRegs.MFBALR1.bit.RONLY = 1; //restore it to read only
DecRegs.MFBALR17.bit.RONLY = 1; //restore it to read only
SysRegs.SYSECR.bit.RESET = 2; //now reset processor.
break;
}
The user checksum addresses are based off Table 13-6 on page 469 of the UCD31xx TRM. See the table for a visual overview of the program flash and user checksum addresses.
You can use these addresses to clear and switch between different program flash blocks.
I presume your application for switching between program flash blocks is for an on-the-fly update. If so, then we do have an example on-the-fly update firmware that I can share, although it is for the UCD3138064 and not the UCD3138128A. Let me know if you are interested and I can send you the files directly.
Here is an article that walks through general on-the-fly/over-the-air (OTA) update: https://www.electronicproducts.com/on-the-fly-power-supply-firmware-upgrades/?terms=Ian+Bower
On-the-fly power supply firmware upgrades.docx
Here are some other E2E threads that may be useful:
Regards,
Jonathan Wong