spi.zip_msp430f169_msp430f169 spi

#include <msp430x16x.h> #include "gyro.h" unsigned char MST_Data = 0x00, SLV_Data = 0xFF; unsigned char MST_Data_16bit = 0x00; unsigned char Read_Data=0x0000; // Stop Watchdog Timer (WDT) void watchdog_stop () { WDTCTL = WDTPW + WDTHOLD; } void set_pins() { P1DIR = 0x1; P1OUT = 0x0; // SPI 0 P3SEL = 0x1E; P3DIR = 0x1B; P3OUT |= 0x10; // SPI 1 P5SEL = 0x1E; P5DIR = 0x1B; P5OUT |= 0x10; } void main () { watchdog_stop (); set_pins (); spi_reset (); _EINT(); // Enable interrupts spi_send (0, 0); // Ready TXBUF0 w/ 1st character LPM4; // Enter LPM4 } #pragma vector=USART0RX_VECTOR __interrupt void SPI0_rx (void) { // dataH and dataL represent the data read from Gyro. // dataH is the High 8-bits. // dataL is the Low 8-bits. // Receive is always from MSB to LSB static unsigned char HLcounter = 0; char dataH = 0, dataL = 0; if (HLcounter == 0) { dataH = spi_read (0); HLcounter++; } else { dataL = spi_read (0); HLcounter = 0; } if (HLcounter == 0) { // TODO: Write down the code to do something with your data // only in this section. This is when the 16-bit data is ready. Read_Data = dataH << 8 + dataL; P1OUT ^= 0x01; } } #pragma vector=USART0TX_VECTOR __interrupt void SPI0_tx (void) { // Transmission is always from MSB to LSB // TODO: // Put something in MST_Data_16bit to send (i.e. register address), // then send the data. MST_Data_16bit = GYRO_REG_TEMP_OUT; MST_Data_16bit << 8; // Send the high 8 bits spi_send (0, MST_Data_16bit >> 8); // Send the low 8 bits spi_send (0, MST_Data_16bit); } // Test purpose! (can be removed) #pragma vector=USART1RX_VECTOR __interrupt void SPI1_rx (void) { //P1OUT = 0x1; } // Test purpose! (can be removed) #pragma vector=USART1TX_VECTOR __interrupt void SPI1_tx (void) { //spi_send (0, MST_Data); } // Timer A0 interrupt service routine #pragma vector=TIMERA0_VECTOR __interrupt void Timer_A(void) { //spi_send (0x0); }