Part Number: MSP430F5529 Tool/software: Code Composer Studio | eCOM LSM303AGR | |-----P3.5---->|CS_ACC Pin 2 | |-----P3.4---->|CS_MAG Pin 3 | |-----P3.3---->|SDI/O Pin 4 | |-----P2.7---->|SCLK Pin 1 | |<----P2.6-----|INT_2_ACC Pin 11 | |<----P2.5-----|INT_1_ACC Pin 12 | |<----P2.0-----|INT_MAG Pin 7 | Is it possible to initialize the SPI for an interface to the eCom when SIMO and SOMI are both on the same pin? Only one CS can be active. I always get 0xFF in the UCA0RXBUF uint8_t eComACC_ReadReg (uint8_t RegNum) { Reg = (RegNum & 0x3F); Reg |= 0x80; // Turn on read, Turn off the multiple data bit P3OUT &= ~BIT5; // Select acceleration sensor Result = UCA0RXBUF; // Read RX buffer just to clear interrupt flag while (!(UCA0IFG & UCTXIFG)); // Wait until ready to write UCA0TXBUF = Reg; // Write Address to TX buffer while (!(UCA0IFG & UCRXIFG)); // Wait until new data was written into RX buffer Result1 = UCA0RXBUF; // Read RX buffer just to clear interrupt flag while (!(UCA0IFG & UCTXIFG)); // Wait until ready to write UCA0TXBUF = 0x00; // Write dummy data to TX buffer while (!(UCA0IFG & UCRXIFG)); // Wait until new data was written into RX buffer Result2 = UCA0RXBUF; // Read RX buffer while (UCA0STAT & UCBUSY); // Wait until USCI_A0 state machine is no longer busy P3OUT |= BIT5; return Result2; // Return new data from RX buffer } void eComACC_WriteReg (uint8_t RegNum, uint8_t AccData) { RegNum &= 0x3F; // Set for write, Turn off the multiple write bit P3OUT &= ~BIT5; // Select acceleration sensor Result = UCA0RXBUF; // Read RX buffer just to clear interrupt flag while (!(UCA0IFG & UCTXIFG)); // Wait until ready to write UCA0TXBUF = RegNum; // Write Reg to TX buffer while (!(UCA0IFG & UCRXIFG)); // Wait until new data was written into RX buffer Result = UCA0RXBUF; // Read RX buffer just to clear interrupt flag while (!(UCA0IFG & UCTXIFG)); // Wait until ready to write UCA0TXBUF = AccData; // Write data to TX buffer while (!(UCA0IFG & UCRXIFG)); // Wait until new data was written into RX buffer Result = UCA0RXBUF; // Read RX buffer while (UCA0STAT & UCBUSY); // Wait until USCI_A0 state machine is no longer busy P3OUT |= BIT5; }
↧