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https://opencores.org/ocsvn/openmsp430/openmsp430/trunk
Subversion Repositories openmsp430
[/] [openmsp430/] [trunk/] [fpga/] [actel_m1a3pl_dev_kit/] [software/] [spacewar/] [hardware.c] - Rev 158
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#include "omsp_system.h" #include "spacewar.h" //************************************************************ // externals // extern volatile unsigned char flags; extern void reset_rkts(rkt_data *, rkt_data *); extern void reset_game(rkt_data *); //************************************************************ // // init_hardware // // initalize all the MSP430 hardware before we start // /* Description: Sets up all the hardware in the MSP430 used by the SPACEWAR game. Stops the watchdog timer. Sets the internal cpu clock to a maximun. Sets the timer to cause an interrupt every 10ms. Sets the SPI interface to talk to the dual DAC. Sets the A to D to use an external reference and unipolar operation. Finally initializes all the variable used by the game. */ void init_all(rkt_data *rkt1, rkt_data *rkt2) { WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer BCSCTL1 = 0x08; // Setup DCO highest range DCOCTL = 0xe0; // biggest DCO P1OUT = 0x04; // TLV5618A CS high P1DIR |= 0x01+0x04; // P1.0=LED, P1.2=TLV5618A_cs P1SEL = 0x08; // P1.3 = VREF //BCSCTL2 = 0x00; // SMCLK divider = 1 //BCSCTL2 = 0x02; // SMCLK divider = 2 //BCSCTL2 = 0x04; // SMCLK divider = 4 BCSCTL2 = 0x06; // SMCLK divider = 8 CCTL0 = CCIE; // CCR0 interrupt enabled CCR0 = 23500; TACTL = TASSEL_2 + MC_1; // SMCLK, upmode _BIS_SR(GIE); // enable interrupts // USICTL0 |= USIPE7+USIPE6+USIPE5+USIMST+USIOE; // Port, SPI master // USICKCTL = USIDIV_0+USISSEL_2+USICKPL; // divide by 1 SMCLK, inactive high // USICTL0 &= ~USISWRST; // release USI for operation // USICTL1 = USICKPH; // take data on falling edge // SD16CTL = SD16SSEL_1; // exter ref, SMCLK // SD16CCTL0 = SD16UNI + SD16SNGL; // 256OSR, unipolar, inter // SD16AE = 0; // P1.1 A4+, A4- = VSS // // P1.4 A2+, A2- = VSS // SD16INCTL0 = SD16INCH_4; // A4+/- start with rocket 1 // SD16CCTL0 |= SD16SC; // Start A2D conversion reset_rkts(rkt1, rkt2); // reset rkt positons reset_game(rkt1); reset_game(rkt2); rkt1->game = 0; rkt2->game = 0; flags |= time_tick; // force an update at startup } //************************************************************ // // Timer A0 interrupt service routine // /* Description: Interrupt service routine for the timer. The function sets a flag for the main loop to update object positions. */ interrupt (TIMERA0_VECTOR) irq_routine(void) { // P1OUT ^= 0x01; // Toggle P1.0 flags |= time_tick; // flag a timer tick has occured } //************************************************************ // // read_a2d // /* Description: Waits for present A to D to finish. Reads 16 bit A to D value. Switches A to D mux to a channel passed into function. Starts another A to D on new mux input. Returns int value read from last mux input A to D. */ unsigned int read_a2d(unsigned int next_mux) { unsigned int last_a2d; if (next_mux==0x0002) { last_a2d = MY_CNTRL1; } else { last_a2d = MY_CNTRL2; } if (last_a2d & 0x8) { // CCW last_a2d = 0xE000; } else if (last_a2d & 0x4) { // CW last_a2d = 0xB000; } else if (last_a2d & 0x2) { // Thrust last_a2d = 0x8000; } else if (last_a2d & 0x1) { // Fire last_a2d = 0x4000; } else { last_a2d = 0x0000; } //while ((SD16CCTL0 & SD16IFG) == 0); // wait for a2d to finish //last_a2d = SD16MEM0; // save results from last a2d //SD16INCTL0 = next_mux; // switch analog mux for next rocket //SD16CCTL0 |= SD16SC; // Start another conversion return last_a2d; } // ************************************************************ // // send one 16 bit value to SPI DAC // /* Description: First put the value into the transmit register. Chip select the DAC. Start the automatic SPI transfer. Wait until the transfer is complete. Finally remove the chip select. */ /* void set_one(int set_1) { USISR = set_1; // send value to DAC P1OUT &= ~0x04; // chip select TLV5618A USICNT = 0x10 + USI16B; // start spi while ((USIIFG & USICTL1) == 0) ; // wait until y spi done P1OUT |= 0x04; // remove chip select } */ // ************************************************************ // // Move DAC's to dot position // // set_x and set_y enter as 0 to 4095 // Masked to 12 bit dac 0 to 4095 /* Description: Move DAC to position set_x, set_y. Write the set_y value into the DAC's BUFFER. Write the set_x value to DAC_x and at the same time move the BUFFER value to DAC_y. This technique removes the stair steping in lines. */ void set_xy(int set_x, int set_y) { //set_one((set_y & 0x0FFF) | 0x5000); // send y value to BUFFER //set_one((set_x & 0x0FFF) | 0xc000); // send x DAC_X, BUFFER to DAC_Y while (MY_DAC_X_STAT); while (MY_DAC_Y_STAT); MY_DAC_Y = (set_y & 0x0FFF); MY_DAC_X = (set_x & 0x0FFF); }
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