;******************************************************************************* ; MSP430G2xx1 Demo - Flash In-System Programming, Copy SegC to SegD ; ; Description: This program first erases flash seg C, then it increments all ; values in seg C, then it erases seg C, then copies seg C to seg D ; Assumed MCLK 771kHz - 1428kHz ; //* Set Breakpoint in the Mainloop to avoid Stressing Flash *// ; ; MSP430G2xx1 ; ; /|\| XIN|; | | | ; |RST XOUT|; | | ; ; ; D Dang ; Texas Instruments Inc ; October 2010 ; Built with Code Composer Essentials Version: 4.2.0 ;******************************************************************************* value equ R4 cdecls C,LIST, "msp430g2231.h" ; -.text ; Program Start ; -RESET mov.w #0280h,SP ; Initialize stackpointer StopWDT mov.w #WDTPW+WDTHOLD,&WDTCTL ; Stop WDT CheckCal cmp.b #0FFh,&CALBC1_1MHZ ; Calibration constants erased? jeq Trap cmp.b #0FFh,&CALDCO_1MHZ jne Load Trap jmp $ ; Trap CPU!! Load mov.b &CALBC1_1MHZ,&BCSCTL1 ; Set DCO to 1MHz mov.b &CALDCO_1MHZ,&DCOCTL clr.b value ; value = value to write to flash ; Mainloop call inc.b call jmp #Write_SegC value #CopyC2D Mainloop ; Copy value to segment C ; ; ; Repeat,SET BREAKPOINT HERE ; ; Write_SegC ;Input = value, holds value to write to Seg C, R5 used as working reg ; mov.w #01040h,R5 ; Timing mov.w #FWKEY+FSSEL0+FN1,&FCTL2 ; *Timing generator = MCLK/3 Erase_SegC mov.w #FWKEY,&FCTL3 ; Lock = mov.w #FWKEY+ERASE,&FCTL1 ; Erase bit = 1, allow interrupts mov.w #0,&01040h ; Dummy write to SegC to erase Prog_SegC mov.w #FWKEY+WRT,&FCTL1 ; Write bit = 1, block interrupts mov.w #FWKEY,&FCTL3 ; Lock = Prog_L1 mov.b value,0(R5) ; inc.w R5 ; cmp.w #01080h,R5 ; jne Prog_L1 ; mov.w #FWKEY+LOCK,&FCTL3 ; Lock = 1; ret ; ; ; - CopyC2D ;Copy Seg C to Seg D, R5 used as working reg ; mov.w #FWKEY+FSSEL0+FN1,&FCTL2 ; *Timing generator = MCLK/3 Erase_SegD mov.w #FWKEY,&FCTL3 ; Lock = mov.w #FWKEY+ERASE,&FCTL1 ; Erase bit = mov.w #0,&01000h ; Dummy write to SegD to erase mov.w #01040h,R5 ; R5 = First byte in Seg C Prog_SegD mov.w #FWKEY+WRT,&FCTL1 ; Write bit = 1, block interrupts mov.w #FWKEY,&FCTL3 ; Lock = Prog_L2 mov.b @R5+,-65(R5) ; Copy Seg C to Seg D cmp.w #01080h,R5 ; jne Prog_L2 ; mov.w #FWKEY+LOCK,&FCTL3 ; Lock = ret ; -; Interrupt Vectors ; -.sect ".reset" ; MSP430 RESET Vector short RESET ; end