137 lines
5.6 KiB
C
Executable File
137 lines
5.6 KiB
C
Executable File
/* --COPYRIGHT--,BSD_EX
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* Copyright (c) 2012, Texas Instruments Incorporated
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of Texas Instruments Incorporated nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*******************************************************************************
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*
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* MSP430 CODE EXAMPLE DISCLAIMER
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*
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* MSP430 code examples are self-contained low-level programs that typically
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* demonstrate a single peripheral function or device feature in a highly
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* concise manner. For this the code may rely on the device's power-on default
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* register values and settings such as the clock configuration and care must
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* be taken when combining code from several examples to avoid potential side
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* effects. Also see www.ti.com/grace for a GUI- and www.ti.com/msp430ware
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* for an API functional library-approach to peripheral configuration.
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*
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* --/COPYRIGHT--*/
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//******************************************************************************
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// MSP430F20xx Demo - Flash In-System Programming, Copy SegC to SegD
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//
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// Description: This program first erases flash seg C, then it increments all
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// values in seg C, then it erases seg D, then copies seg C to seg D.
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// Assumed MCLK 771kHz - 1428kHz.
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// //* Set Breakpoint on NOP in the Mainloop to avoid Stressing Flash *//
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//
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// MSP430F20xx
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// -----------------
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// /|\| XIN|-
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// | | |
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// --|RST XOUT|-
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// | |
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//
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// M. Mitchell / M.Buccini
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// Texas Instruments Inc.
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// December 2005
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// Built with CCE Version: 3.2.0 and IAR Embedded Workbench Version: 3.40A
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//******************************************************************************
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#include <msp430.h>
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char value; // 8-bit value to write to segment A
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// Function prototypes
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void write_SegC (char value);
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void copy_C2D (void);
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int main(void)
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{
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WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
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if (CALBC1_1MHZ==0xFF) // If calibration constants erased
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{
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while(1); // do not load, trap CPU!!
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}
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DCOCTL = 0; // Select lowest DCOx and MODx settings
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BCSCTL1 = CALBC1_1MHZ; // Set DCO to 1MHz
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DCOCTL = CALDCO_1MHZ;
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FCTL2 = FWKEY + FSSEL0 + FN1; // MCLK/3 for Flash Timing Generator
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value = 0; // initialize value
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while(1) // Repeat forever
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{
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write_SegC(value++); // Write segment C, increment value
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copy_C2D(); // Copy segment C to D
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__no_operation(); // SET BREAKPOINT HERE
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}
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}
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void write_SegC (char value)
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{
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char *Flash_ptr; // Flash pointer
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unsigned int i;
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Flash_ptr = (char *) 0x1040; // Initialize Flash pointer
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FCTL1 = FWKEY + ERASE; // Set Erase bit
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FCTL3 = FWKEY; // Clear Lock bit
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*Flash_ptr = 0; // Dummy write to erase Flash segment
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FCTL1 = FWKEY + WRT; // Set WRT bit for write operation
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for (i=0; i<64; i++)
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{
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*Flash_ptr++ = value; // Write value to flash
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}
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FCTL1 = FWKEY; // Clear WRT bit
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FCTL3 = FWKEY + LOCK; // Set LOCK bit
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}
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void copy_C2D (void)
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{
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char *Flash_ptrC; // Segment C pointer
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char *Flash_ptrD; // Segment D pointer
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unsigned int i;
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Flash_ptrC = (char *) 0x1040; // Initialize Flash segment C pointer
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Flash_ptrD = (char *) 0x1000; // Initialize Flash segment D pointer
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FCTL1 = FWKEY + ERASE; // Set Erase bit
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FCTL3 = FWKEY; // Clear Lock bit
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*Flash_ptrD = 0; // Dummy write to erase Flash segment D
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FCTL1 = FWKEY + WRT; // Set WRT bit for write operation
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for (i=0; i<64; i++)
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{
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*Flash_ptrD++ = *Flash_ptrC++; // copy value segment C to segment D
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}
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FCTL1 = FWKEY; // Clear WRT bit
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FCTL3 = FWKEY + LOCK; // Set LOCK bit
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}
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