Changes so this checkout exactly matches CVS at -r release_tinyos_2_0_2_2.

[tinyos-2.x.git] / tos / lib / TOSBoot / stm25p / ExtFlashM.nc

diff --git a/tos/lib/TOSBoot/stm25p/ExtFlashM.nc b/tos/lib/TOSBoot/stm25p/ExtFlashM.nc
new file mode 100644 (file)
index 0000000..f3d16c0
--- /dev/null
+++ b/tos/lib/TOSBoot/stm25p/ExtFlashM.nc
@@ -0,0 +1,114 @@
+// $Id$
+
+/*                                                                     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();
+  }
+
+}