FreeCalypso > hg > freecalypso-tools
annotate target-utils/loadagent/binflash.c @ 990:f34261bb3355
pln-ppb-test: implement PPB erase
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 03 Dec 2023 00:20:14 +0000 |
parents | b34384991094 |
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loadagent: implemented binary flash programming
Mychaela Falconia <falcon@freecalypso.org>
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1 /* |
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2 * Here we are going to implement our new binary protocol |
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3 * for flash programming. |
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4 */ |
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5 |
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6 #include "types.h" |
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7 |
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8 void |
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9 binary_flash_prog_main(program_func) |
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10 int (*program_func)(); |
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11 { |
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12 u8 buf[2048] __attribute__ ((aligned (2))); |
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13 u32 flash_offset; |
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14 unsigned nbytes, p; |
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15 int c; |
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16 |
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17 for (;;) { |
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18 do |
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19 c = serial_in_poll(); |
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20 while (c < 0); |
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21 if (c == 0x04) |
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22 return; |
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23 if (c != 0x01) { |
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24 serial_out(0x15); /* NAK */ |
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25 printf("ERROR: invalid command opcode\n"); |
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26 return; |
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27 } |
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28 /* receive header */ |
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29 for (p = 0; p < 6; p++) { |
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30 c = serial_in_timeout(1000000); /* 0.6 s */ |
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31 if (c < 0) { |
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32 intermediate_timeout: serial_out(0x15); /* NAK */ |
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33 printf("ERROR: timeout receiving command\n"); |
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34 return; |
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35 } |
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36 buf[p] = c; |
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37 } |
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38 flash_offset = ((u32) buf[0] << 24) | |
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39 ((u32) buf[1] << 16) | |
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40 ((u32) buf[2] << 8) | |
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41 (u32) buf[3]; |
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42 if (flash_offset & 1) { |
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43 serial_out(0x15); /* NAK */ |
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44 printf("ERROR: odd flash offset\n"); |
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45 return; |
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46 } |
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47 nbytes = ((u32) buf[4] << 8) | (u32) buf[5]; |
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48 if (nbytes & 1) { |
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49 serial_out(0x15); /* NAK */ |
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50 printf("ERROR: odd byte count\n"); |
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51 return; |
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52 } |
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53 if (nbytes > sizeof buf) { |
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54 serial_out(0x15); /* NAK */ |
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55 printf("ERROR: byte count exceeds buffer\n"); |
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56 return; |
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57 } |
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58 /* receive data */ |
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59 for (p = 0; p < nbytes; p++) { |
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60 c = serial_in_timeout(1000000); /* 0.6 s */ |
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61 if (c < 0) |
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62 goto intermediate_timeout; |
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63 buf[p] = c; |
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64 } |
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65 c = program_func(flash_offset, nbytes >> 1, buf); |
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66 if (c < 0) |
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67 return; |
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68 serial_out(0x06); /* ACK */ |
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69 } |
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70 } |