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| Rev 190 | Rev 244 | ||
|---|---|---|---|
| Line 201... | Line 201... | ||
| 201 | } |
201 | } |
| 202 | else if (pRxBuff->Position < pRxBuff->Size) // rx buffer not full |
202 | else if (pRxBuff->Position < pRxBuff->Size) // rx buffer not full |
| 203 | { |
203 | { |
| 204 | pRxBuff->pData[pRxBuff->Position++] = c; // copy byte to rxd buffer |
204 | pRxBuff->pData[pRxBuff->Position++] = c; // copy byte to rxd buffer |
| 205 | pRxBuff->DataBytes++; |
205 | pRxBuff->DataBytes++; |
| - | 206 | // termination character received and sync has been established |
|
| 206 | if (c == '\r') // termination character received |
207 | if ((c == '\r') && (pRxBuff->pData[0]== '#')) |
| 207 | { |
208 | { |
| 208 | // calculate checksum from transmitted data |
209 | // calculate checksum from transmitted data |
| 209 | u16 crc = 0, i; |
210 | u16 crc = 0, i; |
| 210 | u8 crc1, crc2; |
211 | u8 crc1, crc2; |
| 211 | for(i = 0; i < (pRxBuff->Position-3); i++) |
212 | for(i = 0; i < (pRxBuff->Position-3); i++) |
| Line 215... | Line 216... | ||
| 215 | crc %= 4096; |
216 | crc %= 4096; |
| 216 | crc1 = '=' + crc / 64; |
217 | crc1 = '=' + crc / 64; |
| 217 | crc2 = '=' + crc % 64; |
218 | crc2 = '=' + crc % 64; |
| 218 | // compare checksum to transmitted checksum bytes |
219 | // compare checksum to transmitted checksum bytes |
| 219 | if((crc1 == pRxBuff->pData[pRxBuff->Position-3]) && (crc2 == pRxBuff->pData[pRxBuff->Position-2])) |
220 | if((crc1 == pRxBuff->pData[pRxBuff->Position-3]) && (crc2 == pRxBuff->pData[pRxBuff->Position-2])) |
| - | 221 | { |
|
| 220 | { // checksum is valid |
222 | // checksum is valid |
| 221 | pRxBuff->Position = 0; |
223 | pRxBuff->Position = 0; |
| 222 | pRxBuff->Locked = TRUE; // lock the rxd buffer |
224 | pRxBuff->Locked = TRUE; // lock the rxd buffer |
| 223 | // if 2nd byte is an 'R' start bootloader |
225 | // if 2nd byte is an 'R' start bootloader |
| 224 | if(pRxBuff->pData[2] == 'R') |
226 | if(pRxBuff->pData[2] == 'R') |
| 225 | { |
227 | { |