?? extflashp.nc
字號:
// $Id: ExtFlashP.nc,v 1.1 2009/09/23 18:29:22 razvanm Exp $
/*
* "Copyright (c) 2000-2005 The Regents of the University of California.
* All rights reserved.
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose, without fee, and without written agreement is
* hereby granted, provided that the above copyright notice, the following
* two paragraphs and the author appear in all copies of this software.
*
* IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
* OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
* CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
*/
/**
* @author Jonathan Hui <jwhui@cs.berkeley.edu>
* @author Razvan Musaloiu-E. <razvanm@cs.jhu.edu>
*/
module ExtFlashP {
provides {
interface StdControl;
interface Init;
interface ExtFlash;
}
uses {
interface HplUsartControl as UsartControl;
}
}
implementation {
uint32_t addr;
command error_t Init.init() {
TOSH_MAKE_FLASH_CS_OUTPUT();
TOSH_SET_FLASH_CS_PIN();
call UsartControl.setModeSPI();
return SUCCESS;
}
command error_t StdControl.start() {
return SUCCESS;
}
command error_t StdControl.stop() {
call UsartControl.disableSPI();
return SUCCESS;
}
command void ExtFlash.startRead(uint32_t newAddr) {
uint8_t cmd[4];
uint8_t i;
uint32_t page = newAddr / 512;
uint32_t offset = newAddr % 512;
addr = newAddr;
cmd[0] = 0x03;
cmd[1] = page >> 6;
cmd[2] = (page << 2) | (offset >> 8);
cmd[3] = offset;
TOSH_CLR_FLASH_CS_PIN();
for ( i = 0; i < sizeof(cmd); i++ ) {
call UsartControl.tx(cmd[i]);
while(call UsartControl.isTxEmpty() != SUCCESS);
}
}
command uint8_t ExtFlash.readByte() {
if (!(addr & 0x1ff)) {
call ExtFlash.stopRead();
call ExtFlash.startRead(addr);
}
addr++;
call UsartControl.rx();
call UsartControl.tx(0);
while(call UsartControl.isRxIntrPending() != SUCCESS);
return call UsartControl.rx();
}
command void ExtFlash.stopRead() {
TOSH_SET_FLASH_CS_PIN();
}
}
?? 快捷鍵說明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -