FreeCalypso > hg > freecalypso-hwlab
annotate lcdtest/busops.c @ 174:4f5abad5dd40
doc/Unbuffered-FT2232x-JTAG: update for fc-usbser-tools
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 11 Sep 2023 07:23:18 +0000 |
parents | 4b7cac119fb5 |
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rev | line source |
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1 #include <sys/types.h> |
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2 #include <stdio.h> |
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3 #include <stdlib.h> |
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4 #include <unistd.h> |
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5 #include <ftdi.h> |
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6 #include "exitcodes.h" |
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7 |
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8 extern struct ftdi_context ftdi; |
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9 |
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10 do_ftdi_write(cmd, cmdlen) |
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11 u_char *cmd; |
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12 { |
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13 if (ftdi_write_data(&ftdi, cmd, cmdlen) != cmdlen) { |
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14 fprintf(stderr, "FTDI write error: %s\n", ftdi.error_str); |
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15 exit(ERROR_FTDI); |
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16 } |
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17 } |
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18 |
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19 set_gpio_pins(rs, reset) |
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20 { |
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21 u_char cmd[3]; |
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22 |
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23 cmd[0] = 0x82; |
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24 cmd[1] = (rs ? 1 : 0) | (reset ? 2 : 0); |
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25 cmd[2] = 0x03; |
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26 do_ftdi_write(cmd, 3); |
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27 } |
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28 |
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29 reset_pulse() |
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30 { |
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31 set_gpio_pins(0, 0); |
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32 usleep(50000); |
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33 set_gpio_pins(0, 1); |
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34 return(0); |
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35 } |
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36 |
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37 write_ir(val16) |
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38 unsigned val16; |
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39 { |
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40 u_char cmd[9]; |
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41 |
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42 /* set RS low */ |
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43 cmd[0] = 0x82; |
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44 cmd[1] = 0x02; |
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45 cmd[2] = 0x03; |
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46 /* write upper byte */ |
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47 cmd[3] = 0x92; |
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48 cmd[4] = 0; /* dummy addr */ |
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49 cmd[5] = val16 >> 8; |
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50 /* write lower byte */ |
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51 cmd[6] = 0x92; |
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52 cmd[7] = 0; /* dummy addr */ |
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53 cmd[8] = val16; |
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54 do_ftdi_write(cmd, 9); |
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55 } |
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56 |
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57 write_dr(val16) |
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58 unsigned val16; |
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59 { |
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60 u_char cmd[9]; |
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61 |
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62 /* set RS high */ |
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63 cmd[0] = 0x82; |
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64 cmd[1] = 0x03; |
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65 cmd[2] = 0x03; |
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66 /* write upper byte */ |
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67 cmd[3] = 0x92; |
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68 cmd[4] = 0; /* dummy addr */ |
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69 cmd[5] = val16 >> 8; |
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70 /* write lower byte */ |
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71 cmd[6] = 0x92; |
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72 cmd[7] = 0; /* dummy addr */ |
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73 cmd[8] = val16; |
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74 do_ftdi_write(cmd, 9); |
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75 } |