FreeCalypso > hg > fc-selenite

annotate src/cs/drivers/drv_core/spi/spi_drv.c @ 194:a18bf8df5fab

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aci_pei.c: sync with Magnetite for (MMI != 0) There was a change in Magnetite aci3 for (MMI != 0) configuration; this config does not exist in Selenite, but this change is being pulled in as a sync in order to keep the diff between Magnetite and Selenite to a minimum.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 23 May 2020 07:21:43 +0000
parents b6a5e36de839
children
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1 /**********************************************************************************/
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2 /* TEXAS INSTRUMENTS INCORPORATED PROPRIETARY INFORMATION */
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3 /* */
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4 /* Property of Texas Instruments -- For Unrestricted Internal Use Only */
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5 /* Unauthorized reproduction and/or distribution is strictly prohibited. This */
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6 /* product is protected under copyright law and trade secret law as an */
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7 /* unpublished work. Created 1987, (C) Copyright 1997 Texas Instruments. All */
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8 /* rights reserved. */
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9 /* */
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10 /* */
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11 /* Filename : spi_drv.c */
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12 /* */
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13 /* Description : Functions to drive the SPI module. */
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14 /* The Serial Port Interface is a bidirectional 3 lines */
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15 /* interface dedicated to the transfer of data to and */
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16 /* from up to 5 external devices offering a 3 lines */
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17 /* serial interface. */
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18 /* In this project, it is only used to connect the TI */
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19 /* Analog BaseBand (ABB). */
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20 /* It is assumed that the ABB is connected as the SPI */
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21 /* device 0. */
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22 /* */
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23 /* This interface is specified to be compatible with */
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24 /* the UMA1018M Philips, the FUJITSU MB15F02, the */
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25 /* SIEMENS PMB2306T synthesizers and the TI ABB. */
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26 /* */
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27 /* This serial port is based on a looped shift-register */
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28 /* thus allowing both transmit (PISO) and receive (SIPO) */
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29 /* modes. */
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30 /* */
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31 /* */
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32 /* Author : Pascal PUEL */
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33 /* */
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34 /* Version number : 1.45 */
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35 /* */
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36 /* Date and time : 07/01/03 */
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37 /* */
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38 /* Previous delta : Rework */
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39 /* */
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40 /**********************************************************************************/
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41
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42 #include "spi/spi_drv.h"
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43
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44
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45
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46 /*-----------------------------------------------------------------------*/
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47 /* SPI_InitDev() */
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48 /* */
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49 /* This function initializes the SPI registers for an external device */
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50 /* connected to the serial port. */
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51 /* */
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52 /*-----------------------------------------------------------------------*/
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53 void SPI_InitDev(T_SPI_DEV *Device)
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54 {
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55 unsigned short Param,Gate,Shiftval;
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56 unsigned short Mask = 0x7bde;
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57
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58 /* Clock enable, mask ITs and pre scale setting */
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59 * (volatile SYS_UWORD16 *) SPI_REG_SET1 = (SPI_CLK_ON | Device->PrescVal | SPI_IT_MASK_0 | SPI_IT_MASK_1);
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60
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61 /* Building the parameter for REG_SET2 initialization */
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62 Shiftval = Device->DevId >> 7;
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63 Param = (Device->ClkEdge | Device->TspEnLevel | Device->TspEnForm)<<Shiftval ;
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64 Gate = Mask<<Shiftval;
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65
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66 * (volatile SYS_UWORD16 *) SPI_REG_SET2 = (* (volatile SYS_UWORD16 *) SPI_REG_SET2 & Gate) | Param;
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67
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68
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69 /* Configuring CTRL_REG : this writting erases the previous one */
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70 * (volatile SYS_UWORD16 *) SPI_REG_CTRL = (Device->DataTrLength | Device->DevId);
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71
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72 /* Stop the SPI clock */
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73 #ifdef SPI_CLK_LOW_POWER
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74 SPI_CLK_DISABLE
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75 #endif
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76 }
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77
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