ns953_serialcomm.c

最新MTK手机软件源码

/*****************************************************************************
*  Copyright Statement:
*  --------------------
*  This software is protected by Copyright and the information contained
*  herein is confidential. The software may not be copied and the information
*  contained herein may not be used or disclosed except with the written
*  permission of MediaTek Inc. (C) 2005
*
*  BY OPENING THIS FILE, BUYER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
*  THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
*  RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO BUYER ON
*  AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
*  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
*  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
*  NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
*  SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
*  SUPPLIED WITH THE MEDIATEK SOFTWARE, AND BUYER AGREES TO LOOK ONLY TO SUCH
*  THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. MEDIATEK SHALL ALSO
*  NOT BE RESPONSIBLE FOR ANY MEDIATEK SOFTWARE RELEASES MADE TO BUYER'S
*  SPECIFICATION OR TO CONFORM TO A PARTICULAR STANDARD OR OPEN FORUM.
*
*  BUYER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND CUMULATIVE
*  LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
*  AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
*  OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY BUYER TO
*  MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE. 
*
*  THE TRANSACTION CONTEMPLATED HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE
*  WITH THE LAWS OF THE STATE OF CALIFORNIA, USA, EXCLUDING ITS CONFLICT OF
*  LAWS PRINCIPLES.  ANY DISPUTES, CONTROVERSIES OR CLAIMS ARISING THEREOF AND
*  RELATED THERETO SHALL BE SETTLED BY ARBITRATION IN SAN FRANCISCO, CA, UNDER
*  THE RULES OF THE INTERNATIONAL CHAMBER OF COMMERCE (ICC).
*
*****************************************************************************/

/*******************************************************************************
 *
 * Filename:
 * ---------
 * NS953_SerialComm.c
 *
 * Project:
 * --------
 *   MAUI
 *
 * Description:
 * ------------
 *
 *      Serial communication interfaces (I2C protocol)
 *
 * Author:
 * -------
 * -------
 *
 *==============================================================================
 *             HISTORY
 * Below this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
 *------------------------------------------------------------------------------
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 * removed!
 *------------------------------------------------------------------------------
 * Upper this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
 *==============================================================================
  *******************************************************************************/
#if (defined(NS953))
#include "l1audio_def.h"

#ifdef __CUST_NEW__
   extern const char gpio_fm_i2c_sda_pin;
   extern const char gpio_fm_i2c_scl_pin;

   /* GPIO definition */
   #define SDA       gpio_fm_i2c_sda_pin
   #define SCL       gpio_fm_i2c_scl_pin
#else /* __CUST_NEW__ */
   /* GPIO definition */
   #define SDA 9    /* Top_6227 : 9 */
   #define SCL 8   /* Top_6227 : 8 */
#endif /* __CUST_NEW__ */

#define CRYCLK 41    /* Top_6227: 41 */

void GPIO_ModeSetup(kal_uint16 pin, kal_uint16 conf_dada);
void GPIO_InitIO(char direction, char port);
void GPIO_WriteIO(char data,char port);
char GPIO_ReadIO(char port);

uint8 const FM_RADIO_INPUT_LEVEL_THRESHOLD = 1;

void SerialCommStart(void) /* start or re-start */
{
   GPIO_WriteIO(0,SCL);
   GPIO_InitIO(1,SDA);
   GPIO_WriteIO(1,SDA);
   GPIO_WriteIO(1,SCL);
   GPIO_WriteIO(0,SDA);   /* start condition */
}

void SerialCommStop(void)
{
   GPIO_WriteIO(0,SCL);
   GPIO_InitIO(1,SDA);
   GPIO_WriteIO(0,SDA);
   GPIO_WriteIO(1,SCL);
   GPIO_WriteIO(1,SDA); /* stop condition */
}

uint8 SerialCommTxByte(uint8 data) /* return 0 --> ack */
{
   int32 i;

   for(i=7; i>=0; i--){
      GPIO_WriteIO( 0, SCL); /* low */
   /* The bus operates at a maximum clock frequency of 400 kHz */
      if(i==7)GPIO_InitIO(1,SDA);  // dummy
      GPIO_WriteIO(((data>>i)&0x01), SDA);
      GPIO_WriteIO( 1, SCL); /* high */
   }
   GPIO_WriteIO(0, SCL); /* low */
   GPIO_InitIO(0,SDA);
   GPIO_WriteIO(1, SCL); /* high */
   return GPIO_ReadIO(SDA);
}

void SerialCommRxByte(uint8 *data, uint8 ack)
{
   int32 i;
   uint32 dataCache;

   dataCache = 0;
   for(i=7; i>=0; i--){
      GPIO_WriteIO(0, SCL);
      if(i==7)GPIO_InitIO(0,SDA);
      GPIO_WriteIO(1, SCL);
      dataCache |= (GPIO_ReadIO(SDA)<<i);
   }
   GPIO_WriteIO(0, SCL);
   GPIO_InitIO(1,SDA);
   GPIO_WriteIO(ack, SDA);
   GPIO_WriteIO(1, SCL);
   *data = (uint8)dataCache;
}

void SerialCommInit(void)
{
#ifndef __CUST_NEW__
   GPIO_ModeSetup(SCL,0);
   GPIO_ModeSetup(SDA,0);
#endif /* __CUST_NEW__ */
   GPIO_InitIO(1,SCL);
}

void SerialCommCryClkOn(void)
{
   GPIO_ModeSetup(CRYCLK,3); /* 32.768kHz reference frequency */
}

void SerialCommCryClkOff(void)
{
   GPIO_ModeSetup(CRYCLK,0);
}

#endif