#include "msp430g2553.h"
const unsigned char Sine_Tab[] = // 16 Point 16-bit Sine Table
{
0xFF, // MSB Word 0
0xFF, // LSB
0xF6, // MSB Word 1
0x40, // LSB
0xDA, // MSB Word 2
0x81, // LSB
0xB0, // MSB Word 3
0xFA, // LSB
0x7F, // MSB Word 4
0xFF, // LSB
0x4F, // MSB Word 5
0x03, // LSB
0x25, // MSB Word 6
0x7C, // LSB
0x09, // MSB Word 7
0xBD, // LSB
0x00, // MSB Word 8
0x00, // LSB
0x09, // MSB Word 9
0xBD, // LSB
0x25, // MSB Word 10
0x7C, // LSB
0x4F, // MSB Word 11
0x03, // LSB
0x7F, // MSB Word 12
0xFE, // LSB
0xB0, // MSB Word 13
0xFA, // LSB
0xDA, // MSB Word 14
0x81, // LSB
0xF6, // MSB Word 15
0x40 // LSB
};
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop Watchdog Timer
P1SEL |= BIT6 + BIT7; // Assign I2C pins to USCI_B0
P1SEL2|= BIT6 + BIT7; // Assign I2C pins to USCI_B0
UCB0CTL1 |= UCSWRST; // Enable SW reset
UCB0CTL0 = UCMST + UCMODE_3 + UCSYNC; // I2C Master, synchronous mode
UCB0CTL1 = UCSSEL_2 + UCSWRST; // Use SMCLK, keep SW reset
UCB0BR0 = 12; // fSCL = SMCLK/12 = ~100kHz
UCB0BR1 = 0;
UCB0I2CSA = 0x4c; // Set slave address
UCB0CTL1 &= ~UCSWRST ;// Clear SW reset, resume operation
IE2 |= UCB0TXIE; // Enable TX ready interrupt
UCB0CTL1 |= UCTR + UCTXSTT; // I2C TX, start condition
UCB0TXBUF = 0x010; // Write DAC control byte
__bis_SR_register(CPUOFF + GIE); // Enter LPM0 w/ interrupts
}
// USCI_B0 Data ISR
#pragma vector = USCIAB0TX_VECTOR
__interrupt void USCIAB0TX_ISR(void)
{
static unsigned char ByteCtr;
UCB0TXBUF = Sine_Tab[ByteCtr++]; // Transmit data byte
ByteCtr &= 0x1f; // Do not exceed table
}
这是TI提供的例程：msp430g2x33_adc10_03.c
我的问题是：UCB0I2CSA=0X4C;//set slave address
但是在头文件MSP430G2553.h中，如下所示，并没有0x4C这个地址，而且TI提供的关于IIC的例程中，很多从机的地址并不是宏定义中提供的从机地址。
是程序不对?希望大神能够帮帮我这个新手，谢谢了
#define UCSA9 (0x0200u) /* I2C Slave Address 9 */
#define UCSA8 (0x0100u) /* I2C Slave Address 8 */
#define UCSA7 (0x0080u) /* I2C Slave Address 7 */
#define UCSA6 (0x0040u) /* I2C Slave Address 6 */
#define UCSA5 (0x0020u) /* I2C Slave Address 5 */
#define UCSA4 (0x0010u) /* I2C Slave Address 4 */
#define UCSA3 (0x0008u) /* I2C Slave Address 3 */
#define UCSA2 (0x0004u) /* I2C Slave Address 2 */
#define UCSA1 (0x0002u) /* I2C Slave Address 1 */
#define UCSA0 (0x0001u) /* I2C Slave Address 0 */
