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comparison chipsetsw/drivers/drv_core/spi/spi_drv.c @ 0:509db1a7b7b8

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initial import: leo2moko-r1
author Space Falcon <falcon@ivan.Harhan.ORG>
date Mon, 01 Jun 2015 03:24:05 +0000
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-1:000000000000 0:509db1a7b7b8
1 /**********************************************************************************/
2 /* TEXAS INSTRUMENTS INCORPORATED PROPRIETARY INFORMATION */
3 /* */
4 /* Property of Texas Instruments -- For Unrestricted Internal Use Only */
5 /* Unauthorized reproduction and/or distribution is strictly prohibited. This */
6 /* product is protected under copyright law and trade secret law as an */
7 /* unpublished work. Created 1987, (C) Copyright 1997 Texas Instruments. All */
8 /* rights reserved. */
9 /* */
10 /* */
11 /* Filename : spi_drv.c */
12 /* */
13 /* Description : Functions to drive the SPI module. */
14 /* The Serial Port Interface is a bidirectional 3 lines */
15 /* interface dedicated to the transfer of data to and */
16 /* from up to 5 external devices offering a 3 lines */
17 /* serial interface. */
18 /* In this project, it is only used to connect the TI */
19 /* Analog BaseBand (ABB). */
20 /* It is assumed that the ABB is connected as the SPI */
21 /* device 0. */
22 /* */
23 /* This interface is specified to be compatible with */
24 /* the UMA1018M Philips, the FUJITSU MB15F02, the */
25 /* SIEMENS PMB2306T synthesizers and the TI ABB. */
26 /* */
27 /* This serial port is based on a looped shift-register */
28 /* thus allowing both transmit (PISO) and receive (SIPO) */
29 /* modes. */
30 /* */
31 /* */
32 /* Author : Pascal PUEL */
33 /* */
34 /* Version number : 1.45 */
35 /* */
36 /* Date and time : 07/01/03 */
37 /* */
38 /* Previous delta : Rework */
39 /* */
40 /**********************************************************************************/
41
42 #include "spi/spi_drv.h"
43
44
45
46 /*-----------------------------------------------------------------------*/
47 /* SPI_InitDev() */
48 /* */
49 /* This function initializes the SPI registers for an external device */
50 /* connected to the serial port. */
51 /* */
52 /*-----------------------------------------------------------------------*/
53 void SPI_InitDev(T_SPI_DEV *Device)
54 {
55 unsigned short Param,Gate,Shiftval;
56 unsigned short Mask = 0x7bde;
57
58 /* Clock enable, mask ITs and pre scale setting */
59 * (volatile SYS_UWORD16 *) SPI_REG_SET1 = (SPI_CLK_ON | Device->PrescVal | SPI_IT_MASK_0 | SPI_IT_MASK_1);
60
61 /* Building the parameter for REG_SET2 initialization */
62 Shiftval = Device->DevId >> 7;
63 Param = (Device->ClkEdge | Device->TspEnLevel | Device->TspEnForm)<<Shiftval ;
64 Gate = Mask<<Shiftval;
65
66 * (volatile SYS_UWORD16 *) SPI_REG_SET2 = (* (volatile SYS_UWORD16 *) SPI_REG_SET2 & Gate) | Param;
67
68
69 /* Configuring CTRL_REG : this writting erases the previous one */
70 * (volatile SYS_UWORD16 *) SPI_REG_CTRL = (Device->DataTrLength | Device->DevId);
71
72 /* Stop the SPI clock */
73 #ifdef SPI_CLK_LOW_POWER
74 SPI_CLK_DISABLE
75 #endif
76 }
77
78
79