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bmcternan
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2017/10/30 13:58:41 (permalink)
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Unified Bootloader Application Erase Length

Hi everyone,
I'm not sure what forum this fits in so hopefully I can either get assistance here or be shown where to go.
I'm using the 8bit Unified Bootloader Application v0.1.8 located here: http://www.microchip.com/promo/8-bit-bootloader

I'm attempting to write a simple program onto a PIF16F1619.
 
So far the Unified Bootloader Application can read the correct version.
 
I've figured out that the Bootloader offset address is byte-addressed whereas the PIC is word-addressed so the address on the tool will be divided by 2. Now I'm trying to figure out the length.
 
I've set the program memory size to 0x1000. The requested length to delete coming out of the Unified Bootloader Application is 0x20. Why is this number 0x20? The size of the target application is 0x4D. Where does the Unified Bootloader Application get the length from?
 
Documentation seems to neglect the length.
See the attached screenshot for the logic capture and the Unified Bootloader Application settings.
Thanks

Attached Image(s)

#1
bmcternan
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Re: Unified Bootloader Application Erase Length 2017/11/02 11:31:58 (permalink)
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Anyone have ANY idea at all? Literally anything? 
 
Mods: Is this not the correct forums? 
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bmcternan
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Re: Unified Bootloader Application Erase Length 2017/11/06 09:59:15 (permalink) ☄ Helpfulby Kenneth_L 2018/04/09 08:44:13
+4 (4)
I have gotten little help from the community and not any communication from the mods at all. 
I did get this to work though.
 
Long story short, there's lots of issues with the generated MCC code.
 
Any code I talk about below is 100% auto generated using the MCC tool in MPLAB. Follow the instructions in the Unified Bootloader Application documentation found here: http://www.microchip.com/mymicrochip/filehandler.aspx?ddocname=en573289 
If that link above gets broken, that document is found under microchip's bootloader main page: http://www.microchip.com/promo/unified-bootloaders 
 
Here's how I got this to work:

My Setup

I am using a PIC16F1619 with the Curiosity development kit. I was trying to use the generated MCC code to create a bootloader application to work with the Microchip Unified Bootloader Application.
 
My target app is a simple LED blink application and will be loaded to 0x400 over UART.

Fixing pic16f1_bootload.c

Any flash read code in pic16f1_bootload.c just doesn't work. 
 
Instead, use the FLASH_ReadWord() function found in memory.c .
There seems to be a slight difference between the FLASH_ReadWord() function code and the generated code in pic16f1_bootload.c . I'm not exactly sure what this difference is but nothing I had done was able to get the pic16f1_bootload.c code to work. 
 
I had to replace this code in the Bootload_Required() and Calc_Checksum().
 

Unified Bootloader Settings 

Where the target application is written

The Bootloader Offset and the Program Memory Size setting have nothing to do with where the target application is loaded onto the PIC. Yes, the intel hex files are well documented but it is not clear whether the Unified Bootloader Application settings affect where this hex file is loaded. 
These settings are only used during the erase flash and checksum phases of the bootload process. 
 

Bootloader Offset(Address)

Firstly, this is not the bootloader offset. This is the target app location.
The PIC16F1619 is word addressed, while the Unified Bootloader Application is byte addressed. The addressing is talked about in a few small sentences in various manuals. Because of this, the poorly named Bootloader Offset, should be double the target location of the loaded application. Since my target location was 0x400 I had to put in 0x800 in the Unified Bootloader Application Bootloader Offset setting. 

Program Memory Size

I could not find helpful documentation of this setting anywhere! Through trial and error I was able to figure it out though. This should be the full size of the PIC memory. Remember this is byte addressed, so it should be double the PIC16F1619's memory size. In my case I had this set to 0x4000. 
 
During the flash erase call the Unified Bootloader Application subtracts the Program Memory size from the Bootloader Offset and then divides this by the erase block size. In my case the erase block size is 32 words or 64 bytes. 
 
During the checksum phase the Unified Bootloader Application again subtracts the Program Memory size from the Bootloader Offset and uses this length to calculate the checksum. The checksum is calculated over the entire region of flash memory between the Bootloader Offset and the end of flash memory. The Unified Bootloader Application builds a copy of the PIC state in local memory and then compares this with the resulting checksum from the PIC. 
 
I hope this helps. 
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PIC16F1788
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Re: Unified Bootloader Application Erase Length 2017/11/22 06:10:49 (permalink)
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Hi There if you found any useful forum or links please share here. I am also working with Unified bootloader app and having issues.
 
Thank you in advance. :)
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bmcternan@princetonidentity.com
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Re: Unified Bootloader Application Erase Length 2017/11/22 09:01:46 (permalink)
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That was really the problem, there isn't much information about it at all. 

I spoke with tech support and the source code is not available. Fortunately for us it's written in Java so a Java decompiler will work well to show you the code that they are using.
 
I can say that both UART and I2C works but you need to massage the PIC side to get it to work. The MCC code just won't work out of the box for some reason. 
 
What issues are you having?
post edited by bmcternan@princetonidentity.com - 2017/11/22 09:03:08
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PIC16F1788
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Re: Unified Bootloader Application Erase Length 2017/11/23 05:07:17 (permalink)
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Below is the Problem that i am facing and i posted it too yesterday but still no response:

 
Hi everyone. I am working with The bootloader for the first time, I have generated it from MCC(for PIC16F1789 and using the Explorer 8 Kit by Microchip) and now trying to send the application Hex file to the bootloader Via unified Host software provided by Microchip. Initially i had alot of problems regarding device detection etc but thankfully i have moved a step forward now. AT present i am stuck at a step where the checksum is retrieved i.e. when i press 'Program device' in the Unified bootloader application(Host) version: 0.1.8, it shows following progress in the Console window of the application:
 
> Device: COM8 Bootloading started
> Reading Version ...
> Bootloader Version Read Successful
> Erasing Device ...
> Erase Successful
> Programming Flash ...
> Flashed Programmed
> Retrieving Checksum ...
 
and then at this point i get the status: Disconnected after Programming failed. 
 
I am already trying to solve it from couple of days and till now did not find any solution. I hope there will be someone over here who can help me out.
 
Thank you in Advance!
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mbrowning
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Re: Unified Bootloader Application Erase Length 2017/11/23 06:00:15 (permalink)
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There's likely a problem in the bootloader code that does the flash write. I found that XC8 had messed up the "flash unlock" sequence (on 18'k42) and I had to rewrite it in assembly.
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Re: Unified Bootloader Application Erase Length 2017/11/23 06:51:40 (permalink)
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What i beleive is there is something wrong with Some configs or EEDATA that is causing the problem at retrieving checksum. It's the code that i have:
 
 
uint8_t Get_Version_Data()
{
frame.data[0] = MINOR_VERSION;
frame.data[1] = MAJOR_VERSION;
frame.data[2] = 0; // Max packet size (256)
frame.data[3] = 1;
frame.data[4] = 0;
frame.data[5] = 0;
EEADR = 0x0006; // Get device ID
EECON1bits.CFGS = 1;
EECON1bits.RD = 1;
NOP();
NOP();
frame.data[6] = EEDATL;
frame.data[7] = EEDATH;
frame.data[8] = 0;
frame.data[9] = 0;
frame.data[10] = ERASE_FLASH_BLOCKSIZE;
frame.data[11] = WRITE_FLASH_BLOCKSIZE;
EEADR = 0x0000;
EECON1bits.CFGS = 1;
for (uint8_t i= 12; i < 16; i++)
{
EECON1bits.RD = 1;
NOP();
NOP();
frame.data = EEDATL;
++ EEADRL;
}

return 25; // total length to send back 9 byte header + 16 byte payload
}
// **************************************************************************************
// Read Flash
// In: [<0x01><DLEN><ADDRL><ADDRH><ADDRU>]
// OUT: [<0x01><DLEN><ADDRL><ADDRH><ADDRU><DATA>...]
uint8_t Read_Flash()
{
EEADRL = frame.address_L;
EEADRH = frame.address_H;
EECON1 = 0x80;
for (uint8_t i = 0; i < frame.data_length; i += 2)
{
EECON1bits.RD = 1;
NOP();
NOP();
frame.data = EEDATL;
frame.data[i+1] = EEDATH;
++ EEADR;
}

return (frame.data_length + 9);
}
// **************************************************************************************
// Write Flash
// In: [<0x02><DLENBLOCK><0x55><0xAA><ADDRL><ADDRH><ADDRU><DATA>...]
// OUT: [<0x02>]
uint8_t Write_Flash()
{
EEADRL = frame.address_L;
EEADRH = frame.address_H;
EECON1 = 0xA4; // Setup writes
if ((EEADR & 0x7FFF) < NEW_RESET_VECTOR)
{
frame.data[0] = ERROR_ADDRESS_OUT_OF_RANGE;
return (10);
}
for (uint8_t i= 0; i < frame.data_length; i += 2)
{
if (((EEADRL & LAST_WORD_MASK) == LAST_WORD_MASK)
|| (i == frame.data_length - 2))
EECON1bits.LWLO = 0;
EEDATL = frame.data;
EEDATH = frame.data[i+1];

StartWrite();
++ EEADR;
}
frame.data[0] = COMMAND_SUCCESS;
EE_Key_1 = 0x00; // erase EE Keys
EE_Key_2 = 0x00;
return (10);
}
// **************************************************************************************
// Erase Program Memory
// Erases data_length rows from program memory
uint8_t Erase_Flash ()
{
EEADRL = frame.address_L;
EEADRH = frame.address_H;
if ((EEADR & 0x7FFF) < NEW_RESET_VECTOR)
{
frame.data[0] = ERROR_ADDRESS_OUT_OF_RANGE;
return (10);
}
for (uint16_t i=0; i < frame.data_length; i++)
{
if ((EEADR & 0x7F) >= END_FLASH)
{
frame.data[0] = ERROR_ADDRESS_OUT_OF_RANGE;
return (10);
}
EECON1 = 0x94; // Setup writes
StartWrite();
EEADR += ERASE_FLASH_BLOCKSIZE;
}
frame.data[0] = COMMAND_SUCCESS;
frame.EE_key_1 = 0x00; // erase EE Keys
frame.EE_key_2 = 0x00;
return (10);
}
// **************************************************************************************
// Read_EE_Data
//
// In: [<0x04><DataLengthL><DataLengthH> <unused><unused> <ADDRL><ADDRH><ADDRU><unused>...]
// OUT: [<0x04><DataLengthL><DataLengthH> <unused><unused> <ADDRL><ADDRH><ADDRU><unused><DATA>...]
//
uint8_t Read_EE_Data()
{
EEADRL = frame.address_L;
EEADRH = frame.address_H | 0x70; // 0x70 needed for new style ee access
EECON1 = 0x40; // sets PGD bit for old style eeaccess
for (uint8_t i = 0; i < frame.data_length; i++)
{
EECON1bits.RD = 1;
NOP();
NOP();
frame.data = EEDATL;
++ EEADRL;
}
return (frame.data_length+9);
}

// **************************************************************************************
// Write_EE_Data
// In: [<0x05><DLEN><ADDRL><ADDRH><0x00><DATA>...]
// OUT: [<0x05>]
uint8_t Write_EE_Data()
{
EEADRL = frame.address_L;
EEADRH = frame.address_H | 0x70;
EECON1 = 0x44;
for (uint8_t i = 0; i < frame.data_length; i++)
{
EEDATL = frame.data;
StartWrite ();
while (EECON1bits.WR == 1); // wait until previous write complete
++ EEADRL;
}
frame.data[0] = 0x01;
return 10;
}

// **************************************************************************************
// Read Config Words
// In: [<0x06><DataLengthL><unused> <unused><unused> <ADDRL><ADDRH><ADDRU><unused>...]
// OUT: [9 byte header + 4 bytes config1 + config 2]

uint8_t Read_Config ()
{
EEADRL = frame.address_L;
EEADRH = frame.address_H;
EECON1 = 0x40; // can these be combined?
for (uint8_t i= 0; i < frame.data_length; i += 2)
{
EECON1bits.RD = 1;
NOP();
NOP();
frame.data = EEDATL;
frame.data[i+1] = EEDATH;
++ EEADR;
}
return (13); // 9 byte header + 4 bytes config words
}
// **************************************************************************************
// Write Config Words
uint8_t Write_Config ()
{
EEADRL = frame.address_L;
EEADRH = frame.address_H;
if ((EEADR & 0x7FFF) < NEW_RESET_VECTOR)
{
frame.data[0] = ERROR_ADDRESS_OUT_OF_RANGE;
return (10);
}
EECON1 = 0xC4; // Setup writes
for (uint8_t i = 0; i < frame.data_length; i += 2)
{
EEDATL = frame.data;
EEDATH = frame.data[i+1];

StartWrite();
++ EEADR;
}
frame.data[0] = COMMAND_SUCCESS;
EE_Key_1 = 0x00; // erase EE Keys
EE_Key_2 = 0x00;
return (10);
}

// **************************************************************************************
// Calculate Checksum
// In: [<0x08><DataLengthL><DataLengthH> <unused><unused> <ADDRL><ADDRH><ADDRU><unused>...]
// OUT: [9 byte header + ChecksumL + ChecksumH]


uint8_t Calc_Checksum()
{
EEADRL = frame.address_L ; //<< 1 not present in original
EEADRH = frame.address_H ; //<< 1 not present in original
// if(frame.address_L & 0x08) //Not present in original
// EEADRH +=1; //Not present in original
EECON1 = 0x80; //0x195 //0x80; //0x08
check_sum = 0; //0xF359; //0xFFFF; //0

for (uint16_t i = 0;i < frame.data_length; i += 2)
{
EECON1bits.RD = 1;
// while(EECON1bits.RD = 1) //Not present in original
NOP();
NOP();
check_sum += (uint16_t)EEDATA;
++ EEADR;
}
frame.data[0] = (uint8_t) (check_sum & 0x00FF);
frame.data[1] = (uint8_t)((check_sum & 0xFF00) >> 8);
return (11);
}
 
 
// *****************************************************************************
// Unlock and start the write or erase sequence.
void StartWrite()
{
CLRWDT();
EECON2 = EE_Key_1;
EECON2 = EE_Key_2;
EECON1bits.WR = 1; // Start the write
// had to switch to assembly - compiler doesn't comprehend no need for bank switch
asm ("movf " str(_EE_Key_1) ",w");
asm ("movwf " str(BANKMASK(EECON2)));
asm ("movf " str(_EE_Key_2) ",w");
asm ("movwf " str(BANKMASK(EECON2)));
asm ("bsf " str(BANKMASK(EECON1)) ",1"); // Start the write
NOP();
NOP();
return;
}
 
post edited by PIC16F1788 - 2017/11/23 09:22:52
#8
mbrowning
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Re: Unified Bootloader Application Erase Length 2017/11/23 07:14:59 (permalink)
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Have you read back the program memory after the bootloader is done to see if it has actually written anything?
You might comment out the 'C' lines that are then duplicated by the inline assembly.
I assume EE_KEY_1/2 are located in the same bank as EECON1/2  ?
 
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Jim Nickerson
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Re: Unified Bootloader Application Erase Length 2017/11/23 07:39:24 (permalink)
+1 (1)
PIC16F1788
  Please do make use of "code tags" when posting code.
use "[ c o d e ] before the code and [ / c o d e ] after.
Do type the code tags without the spaces ( if I removed the spaces you would no longer be able to see the tags).
#10
PIC16F1788
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Re: Unified Bootloader Application Erase Length 2017/11/23 09:17:52 (permalink)
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Hi Thank you for your reply.
 
Can you explain it in simple words and in detail please. As i am new to this that's why i am not familiar with many things.
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Jim Nickerson
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Re: Unified Bootloader Application Erase Length 2017/11/23 09:27:33 (permalink)
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PIC16F1788
Hi Thank you for your reply.
 
Can you explain it in simple words and in detail please. As i am new to this that's why i am not familiar with many things.


Which post are you responding to ?
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PIC16F1788
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Re: Unified Bootloader Application Erase Length 2017/11/23 09:29:56 (permalink)
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Hi Thank you for your reply.
 
Can you explain it in simple words and in detail please. As i am new to this that's why i am not familiar with many things.
#13
PIC16F1788
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Re: Unified Bootloader Application Erase Length 2017/11/23 09:31:57 (permalink)
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Hi Thank you for your reply.
 
Can you explain it in simple words and in detail please. As i am new to this that's why i am not familiar with many things.
 
JANickerson
PIC16F1788
  Please do make use of "code tags" when posting code.
use "[ c o d e ] before the code and [ / c o d e ] after.
Do type the code tags without the spaces ( if I removed the spaces you would no longer be able to see the tags).




#14
PIC16F1788
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Re: Unified Bootloader Application Erase Length 2017/11/23 09:34:16 (permalink)
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Hi Thank you for your reply.
 
Can you explain it in simple words and in detail please. As i am new to this that's why i am not familiar with many things.
 
mbrowning
Have you read back the program memory after the bootloader is done to see if it has actually written anything?
You might comment out the 'C' lines that are then duplicated by the inline assembly.
I assume EE_KEY_1/2 are located in the same bank as EECON1/2  ?
 




#15
Jim Nickerson
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Re: Unified Bootloader Application Erase Length 2017/11/23 09:44:03 (permalink)
+1 (1)
PIC16F1788
Hi Thank you for your reply.

Can you explain it in simple words and in detail please. As i am new to this that's why i am not familiar with many things.
 
JANickerson
PIC16F1788
  Please do make use of "code tags" when posting code.
use "[ c o d e ] before the code and [ / c o d e ] after.
Do type the code tags without the spaces ( if I removed the spaces you would no longer be able to see the tags).






I do not know how to use any simpler words.
I wonder if this is a language problem (maybe english is not your primary language)?
If you will illuminate us maybe we can find someone who can help.
#16
PIC16F1788
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Re: Unified Bootloader Application Erase Length 2017/11/23 10:10:22 (permalink)
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Thank you again for your reply. That was done by mistake. It was my first time that's why it happend and infact i wanted to reply to MARK, which i did later. Afterwards i tried to delete the extra post in which there was no one qouted and the one in which i quoted your reply ba mistake but at my end this is not possible. Hopefully the modifier will delete the posts that were by mistake posted. Thanks again and yes please guide me with the issue that i am having with the bootloader. :)
 
JANickerson
PIC16F1788
Hi Thank you for your reply.

Can you explain it in simple words and in detail please. As i am new to this that's why i am not familiar with many things.
 
JANickerson
PIC16F1788
  Please do make use of "code tags" when posting code.
use "[ c o d e ] before the code and [ / c o d e ] after.
Do type the code tags without the spaces ( if I removed the spaces you would no longer be able to see the tags).






I do not know how to use any simpler words.
I wonder if this is a language problem (maybe english is not your primary language)?
If you will illuminate us maybe we can find someone who can help.




#17
mbrowning
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Re: Unified Bootloader Application Erase Length 2017/11/23 13:05:48 (permalink)
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if you are loading the boot loader with pickit3 or other debugger/programmer you can read back the program memory after the boot loader has run (and failed) and see if it actually programmed what you expect. If not, there's something wrong on the unlock or flashwrite. I suspect there's nothing (all 0x3fff).
#18
bmcternan@princetonidentity.com
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Re: Unified Bootloader Application Erase Length 2017/11/27 07:05:30 (permalink)
+1 (1)
I wrote about the calc checksum function not working out of the box. The generated bootloader code cannot properly read flash. 
Here's what I used. Any other issues I had was due to the program not properly loading. 
 
Hope this helps:

 
// **************************************************************************************
// Calculate Checksum
// In: [<0x08><DataLengthL><DataLengthH> <unused><unused> <ADDRL><ADDRH><ADDRU><unused>...]
// OUT: [9 byte header + ChecksumL + ChecksumH]
uint8_t Calc_Checksum()
{
uint16_t addr = (frame.address_H << 8) | frame.address_L;
check_sum = 0;
for (uint16_t i = 0;i < frame.data_length; i += 2)
{
check_sum += FLASH_ReadWord(addr);
++ addr;
}
frame.data[0] = (uint8_t) (check_sum & 0x00FF);
frame.data[1] = (uint8_t)((check_sum & 0xFF00) >> 8);
return (11);
}

post edited by bmcternan@princetonidentity.com - 2017/11/27 07:11:52
#19
johnszy
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Re: Unified Bootloader Application Erase Length 2017/11/28 14:59:16 (permalink)
+1 (1)
Thanks Brennan for your posts and solution!  Yes, agree, the bootloader docs are not clear (and have some errors) in how to use 8bit chip, but I was able to get my blinkyApp + bootloader going as well, once I doubled the mislabeled "bootloader offset" address value from 0x400 to, 0x800  and doubled the Program Memory from 0x2000 to 0x4000 while using the Unified-host_0.1.8.jar app for PIC16F1619 as you had posted.
 
I simplified and bypassed the initial problematic FLASH read in the Bootloader_Required() routine as below since I am only using GPIO to externally force bootloader mode. 
 
[ c o d e ]
bool Bootload_Required ()
{
// ******************************************************************
// Check an IO pin to force entry into bootloader
// ******************************************************************
#info "You may need to add additional delay here between enabling weak pullups and testing the pin."
for (uint8_t i = 0; i != 0xFF; i++) NOP();
if (IO_PIN_ENTRY_PORT_PIN == IO_PIN_ENTRY_RUN_BL)
{
return (true);
}
return (false);
}
[ / c o d e ]
 
As it turns out, after entering the correct offset and program memory size in the UnifiedHost app, it programmed correctly even though it reported bad checksums and despite the UnifiedHost app claiming that it failed. I inserted your Calc_Checksum() routine above, and the checksum now works and the UnifiedHost app reports success as well. Thank you.
#20
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