Hello i tried to get the spi working but it wont so may someone has a idea what i do wrong
thanks for the help
Daniel
#include <ioCC2540.h>
#include "ADXL345.h"
//***********************************************************************************
// Defines
// Accelerometer connected at (rev0.6/rev1.0):
// P0_6 = DATA_READY/-
// P1_4 = -/CS
// P1_5 = SCK
// P1_7 = MISO
// P1_6 = MOSI
// P1_4 = CS/DATA_READY
#define SCK P1_5
#define MISO P1_7
#define MOSI P1_6
//#ifdef REV_1_0
#define CS P1_4
//#elif (defined REV_0_6)
//#define CS P1_4
//#endif
#define CS_DISABLED 1
#define CS_ENABLED 0
#define SCK_ENABLED 1
//***********************************************************************************
// Function prototypes
void spiWriteByte(uint8 write);
void spiReadByte(uint8 *read, uint8 write);
/** \brief Initialize SPI interface and CMA3000-D01 accelerometer
*
* This will initialize the SPI interface and CMA3000-D01 accelerometer
*
*/
void accInit(void)
{
//*** Setup USART 0 SPI at alternate location 2 ***
// USART 0 at alternate location 2
PERCFG |= 0x01;
// Peripheral function on SCK, MISO and MOSI (P1_3-5)
P1SEL |= 0x20;
P1DIR |= 0xE0;
// Configure CS (P1_7/P1_2) as output
//#ifdef REV_1_0
P1DIR |= 0x10;
//#elif (defined REV_0_6)
// P1DIR |= 0x10
//#endif
CS = CS_DISABLED;
//*** Setup the SPI interface ***
// SPI master mode
U0CSR = 0x00;
// Negative clock polarity, Phase: data out on CPOL -> CPOL-inv
// data in on CPOL-inv -> CPOL
// MSB first
U0GCR = 0x20;
// SCK frequency = 480.5kHz (max 500kHz)
U0GCR |= 0x0C;
U0BAUD = 0xEC;
uint8 readValue;
accWriteReg(CTRL, RANGE_2G | MODE_100HZ_MEAS);
WAIT_1_3US(80);
do{
accReadReg(STATUS, &readValue);
WAIT_1_3US(80);
}while(readValue & 0x08);
}
/** \brief Write one byte to a sensor register
*
* Write one byte to a sensor register
*
* \param[in] reg
* Register address
* \param[in] val
* Value to write
*/
void accWriteReg(uint8 reg, uint8 val)
{
CS = CS_ENABLED;
spiWriteByte(reg|0x02);
spiWriteByte(val);
CS = CS_DISABLED;
}
/** \brief Read one byte from a sensor register
*
* Read one byte from a sensor register
*
* \param[in] reg
* Register address
* \param[in] *pVal
* Pointer to variable to put read out value
*/
void accReadReg(uint8 reg, uint8 *pVal)
{
CS = CS_ENABLED;
WAIT_1_3US(2);
spiWriteByte(reg);
spiReadByte(pVal, 0xFF);
CS = CS_DISABLED;
}
/** \brief Read x, y and z acceleration data
*
* Read x, y and z acceleration data in one operation.
* NOTE: No sensor access must be made immidiately folloing this operation
* without enabling the last Wait call.
*
* \param[in] *pXVal
* Pointer to variable to put read out X acceleration
* \param[in] *pYVal
* Pointer to variable to put read out Y acceleration
* \param[in] *pZVal
* Pointer to variable to put read out Z acceleration
*/
void accReadAcc(int8 *pXVal, int8 *pYVal, int8 *pZVal)
{
// X
accReadReg(DOUTX, (uint8*)pXVal);
WAIT_1_3US(80);
// Y
accReadReg(DOUTY, (uint8*)pYVal);
WAIT_1_3US(80);
//Z
accReadReg(DOUTZ, (uint8*)pZVal);
//WAIT_1_3US(80);
}
/** \brief Write one byte to SPI interface
*
* Write one byte to SPI interface
*
* \param[in] write
* Value to write
*/
void spiWriteByte(uint8 write)
{
U0CSR &= ~0x02; // Clear TX_BYTE
U0DBUF = write;
while (!(U0CSR & 0x02)); // Wait for TX_BYTE to be set
}
/** \brief Read one byte from SPI interface
*
* Read one byte from SPI interface
*
* \param[in] read
* Read out value
* \param[in] write
* Value to write
*/
void spiReadByte(uint8 *read, uint8 write)
{
U0CSR &= ~0x02; // Clear TX_BYTE
U0DBUF = write;
while (!(U0CSR & 0x02)); // Wait for TX_BYTE to be set
*read = U0DBUF;
}
