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annotate target-utils/loadagent/binflash.c @ 995:74024eb17e04

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fc-loadtool help: improve language regarding 16 MiB flash chips In FC project history, 16 MiB flash originally meant Pirelli DP-L10. Then we got FCDEV3B with the same flash (our own design), but now we are discovering more Calypso devices that used such large flash, both late Calypso era (Sony Ericsson K2x0) as well as much earlier ones (FIC FLUID devices.txt file with 2004 dates, Leonardo+ rev 5). Hence we need to migrate to more generic or neutral language in associated documentation, without giving elevated status to specific examples that drove our early project history.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 03 Dec 2023 21:11:12 +0000
parents b34384991094
children
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b34384991094 loadagent: implemented binary flash programming
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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 }