+++ /dev/null
-// $Id$
-
-/* tab:2
- * "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>
- */
-
-module ExtFlashM {
- provides {
- interface StdControl;
- interface Init;
- interface ExtFlash;
- }
- uses {
- interface HPLUSARTControl as USARTControl;
- }
-}
-
-implementation {
-
- command error_t Init.init() {
- TOSH_MAKE_FLASH_HOLD_OUTPUT();
- TOSH_MAKE_FLASH_CS_OUTPUT();
- TOSH_SET_FLASH_HOLD_PIN();
- call USARTControl.setModeSPI();
- return SUCCESS;
- }
-
- command error_t StdControl.start() {
- return SUCCESS;
- }
-
- command error_t StdControl.stop() {
-
- TOSH_CLR_FLASH_CS_PIN();
-
- call USARTControl.tx(0xb9);
- while(call USARTControl.isTxEmpty() != SUCCESS);
-
- TOSH_SET_FLASH_CS_PIN();
-
- call USARTControl.disableSPI();
-
- return SUCCESS;
-
- }
-
- void powerOnFlash() {
-
- uint8_t i;
-
- TOSH_CLR_FLASH_CS_PIN();
-
- // command byte + 3 dummy bytes + signature
- for ( i = 0; i < 5; i++ ) {
- call USARTControl.tx(0xab);
- while(call USARTControl.isTxIntrPending() != SUCCESS);
- }
-
- TOSH_SET_FLASH_CS_PIN();
-
- }
-
- command void ExtFlash.startRead(uint32_t addr) {
-
- uint8_t i;
-
- powerOnFlash();
-
- TOSH_CLR_FLASH_CS_PIN();
-
- // add command byte to address
- addr |= (uint32_t)0x3 << 24;
-
- // address
- for ( i = 4; i > 0; i-- ) {
- call USARTControl.tx((addr >> (i-1)*8) & 0xff);
- while(call USARTControl.isTxIntrPending() != SUCCESS);
- }
-
- }
-
- command uint8_t ExtFlash.readByte() {
- 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();
- }
-
-}