FreeCalypso > hg > fc-magnetite
annotate src/cs/layer1/gtt_include/ctm/tonemod.h @ 629:3231dd9b38c1
armio.c: make GPIOs 8 & 13 outputs driving 1 on all "classic" targets
Calypso GPIOs 8 & 13 are pinmuxed with MCUEN1 & MCUEN2, respectively,
and on powerup these pins are MCUEN, i.e., outputs driving 1. TI's code
for C-Sample and earlier turns them into GPIOs configured as outputs also
driving 1 - so far, so good - but TI's code for BOARD 41 (which covers
D-Sample, Leonardo and all real world Calypso devices derived from the
latter) switches them from MCUEN to GPIOs, but then leaves them as inputs.
Given that the hardware powerup state of these two pins is outputs driving 1,
every Calypso board design MUST be compatible with such driving; typically
these GPIO signals will be either unused and unconnected or connected as
outputs driving some peripheral. Turning these pins into GPIO inputs will
result in floating inputs on every reasonably-wired board, thus I am
convinced that this configuration is nothing but a bug on the part of
whoever wrote this code at TI.
This floating input bug had already been fixed earlier for GTA modem and
FCDEV3B targets; the present change makes the fix unconditional for all
"classic" targets. The newly affected targets are D-Sample, Leonardo,
Tango and GTM900.
| author | Mychaela Falconia <falcon@freecalypso.org> |
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| date | Thu, 02 Jan 2020 05:38:26 +0000 |
| parents | 945cf7f506b2 |
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| rev | line source |
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1 /* |
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2 ******************************************************************************* |
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3 * |
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4 * COPYRIGHT (C) 2000 BY ERICSSON EUROLAB DEUTSCHLAND GmbH |
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5 * 90411 NUERNBERG, GERMANY, Tel Int + 49 911 5217 100 |
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6 * |
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7 * The program(s) may be used and/or copied only with the |
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8 * written permission from Ericsson or in accordance |
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9 * with the terms and conditions stipulated in the agreement or |
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10 * contract under which the program(s) have been supplied. |
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11 * |
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12 * Changes since October 13, 2000: |
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13 * - The type mod_state_t includes a new member txbits_fifo_state now. |
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14 * |
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15 ******************************************************************************* |
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16 * |
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17 * File : tonemod.h |
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18 * Purpose : header file for tonemod.c |
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19 * |
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20 ******************************************************************************* |
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21 */ |
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22 |
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23 #ifndef tonemod_h |
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24 #define tonemod_h "$Id: $" |
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25 |
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26 /* |
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27 ******************************************************************************* |
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28 * INCLUDE FILES |
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29 ******************************************************************************* |
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30 */ |
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31 |
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32 #include <fifo.h> |
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33 |
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34 /* |
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35 ******************************************************************************* |
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36 * DECLARATION OF PROTOTYPES |
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37 ******************************************************************************* |
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38 */ |
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39 |
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40 |
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41 /* Define a type for the state variable of the function tonemod() */ |
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42 |
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43 typedef struct { |
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44 WORD16 cntModulatedSamples; |
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45 WORD16 actualBits[2]; |
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46 fifo_state_t txbits_fifo_state; |
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47 } mod_state_t; |
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48 |
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49 |
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50 /* ---------------------------------------------------------------------- */ |
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51 /* Function init_tonemod() */ |
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52 /* *********************** */ |
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53 /* This function has to be executed before tonemod() can be used. */ |
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54 /* ---------------------------------------------------------------------- */ |
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55 |
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56 void init_tonemod(mod_state_t *mod_state); |
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57 |
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58 |
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59 /* ---------------------------------------------------------------------- */ |
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60 /* Function tonemod() */ |
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61 /* ****************** */ |
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62 /* Modulator of the Cellular Text Telephone Modem. */ |
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63 /* The input vector bits_in must contain the bits that have to be */ |
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64 /* transmitted. The length of bits_in must be even because always two */ |
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65 /* bits are coded in parallel. */ |
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66 /* Bits are either unipolar (i.e. {0, 1}) or bipolar (i.e. {-1, +1)}. */ |
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67 /* The length of the output vector tones_out must be 20 times longer than */ |
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68 /* the length of bits_in, since each pair of two bits is coded within a */ |
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69 /* frame of 40 audio samples. */ |
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70 /* ---------------------------------------------------------------------- */ |
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71 |
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72 void tonemod(WORD16 *tones_out, |
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73 WORD16 *bits_in, |
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74 WORD16 num_samples_tones_out, |
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75 WORD16 num_bits_in, |
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76 mod_state_t *mod_state); |
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77 |
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78 #endif |
