private bool DecodeLine(StreamReader sr, ref int upper_address, ref bool eof, ref LineInfo li)
// Desc: Decode one line in hex file
// Input: sr: Stream for hex file
// upper_address: Upper address
// eof: End of file indicator
// Output: li: Line inforamtion
{
byte[] data;
int i;
string s;
string line;
// Read one line
line = sr.ReadLine();
// Get record type
s = line.Substring(7, 2);
li.recordType = int.Parse(s, NumberStyles.AllowHexSpecifier);
// Deal with extended address
while (li.recordType == 04)
{
s = line.Substring(9, 4);
upper_address = int.Parse(s, NumberStyles.AllowHexSpecifier);
line = sr.ReadLine();
s = line.Substring(7, 2);
li.recordType = int.Parse(s, NumberStyles.AllowHexSpecifier);
}
// Check if last line
if (li.recordType == 1)
{
eof = true;
return(false);
}
// Get line inforamtion
s = (line.Substring(1, 2));
li.byteLen = int.Parse(s, NumberStyles.AllowHexSpecifier);
s = line.Substring(3, 4);
li.address = (int.Parse(s, NumberStyles.AllowHexSpecifier) + (upper_address << 16)) / 2;
// Store data in li.data
if (li.byteLen >= 4)
{
data = new byte[li.byteLen * 3 / 4];
for (i = 0; i < li.byteLen; i = i + 4)
{
s = line.Substring(9 + 2 * i, 2); // LSB
data[i * 3 / 4 + 0] = (byte)int.Parse(s, NumberStyles.AllowHexSpecifier);
s = line.Substring(11 + 2 * i, 2);
data[i * 3 / 4 + 1] = (byte)int.Parse(s, NumberStyles.AllowHexSpecifier);
s = line.Substring(13 + 2 * i, 2); // MSB
data[i * 3 / 4 + 2] = (byte)int.Parse(s, NumberStyles.AllowHexSpecifier);
}
li.data = data;
}
return(true);
}
private bool CreateBuffers(int start_address, byte[] code_buf, byte[] config_buf)
// Desc: Create buffer to send for programing with bootloader
// Input: start_address: Start address of bootloader program (should not be overwritten)
// Output: code_buf: Data for user application
// config_buf: Data for configuration register
// bool: true = success, false = fail
{
StreamReader sr;
LineInfo li = new LineInfo();
int i;
int upper_address = 0;
bool eof = false;
// Initialize code_buf
for (i = 0; i < code_buf.Length; i++)
{
code_buf[i] = 0xff;
}
code_buf[0] = (byte)start_address; // LSB
code_buf[1] = (byte)(start_address >> 8);
code_buf[2] = (byte)(start_address >> 16); // MSB
code_buf[3] = 0x00;
code_buf[4] = 0x00;
code_buf[5] = 0x00;
code_buf[0x0C00 * 3 / 2] = 0x00; // Delay value for bootloader
// Initialize config_buf
for (i = 0; i < config_buf.Length; i++)
{
config_buf[i] = 0xff;
}
// Open hex file
sr = File.OpenText(hexFileLocation);
while (eof == false)
{
// Decode next line(s)
if (DecodeLine(sr, ref upper_address, ref eof, ref li) == true)
{
// Add initialization location (start of user application) to code_buf
if (li.address == 0)
{
for (i = 0; i < li.data.Length; i++)
{
code_buf[0x0C02 * 3 / 2 + i] = li.data[i];
}
}
// Add to code_buff
else if (((0x4 <= li.address) && (li.address < 0x200) || (0xC00 <= li.address) && (li.address < 0x15800)))
{
for (i = 0; i < li.data.Length; i++)
{
code_buf[li.address * 3 / 2 + i] = li.data[i];
}
}
// Add to config_buf
else if ((li.address >= 0xf80000) && (li.address < 0xf80010))
{
config_buf[(li.address - 0xf80000) * 3 / 2] = 0x00;
config_buf[(li.address - 0xf80000) * 3 / 2 + 1] = li.data[0]; // LSB
config_buf[(li.address - 0xf80000) * 3 / 2 + 2] = li.data[1]; // MSB
}
else
{
MessageBox.Show("Invalid memory region to write");
return(false);
}
}
}
sr.Close();
return(true);
}
