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Line 4... Line 4...
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/*
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/*
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 * Writes the given byte to the register at the address
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 * Writes the given byte to the register at the address
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 */
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 */
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void WriteSPI(unsigned char addr, unsigned char data) {
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void WriteSPI(unsigned char addr, unsigned char data) {
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	halSPISetPolarityPhase(1,1);		// ADXL345 operates in SPI(1,1)
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	ADXL_CS_LOW();
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	ADXL_CS_LOW();
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	spiSendByte(addr & ~ADXL_BYTE_WRITE);
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	spiSendByte(addr & ~ADXL_BYTE_WRITE);
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	spiSendByte(data);
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	spiSendByte(data);
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	ADXL_CS_HIGH();
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	ADXL_CS_HIGH();
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	halSPISetPolarityPhase(0,0);		// Revert back to SPI(0,0)
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}
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}
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/*
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/*
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 * Reads the value of the register at the address
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 * Reads the value of the register at the address
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 */
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 */
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unsigned char ReadSPI(unsigned char addr) {
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unsigned char ReadSPI(unsigned char addr) {
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	unsigned char ret;
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	unsigned char ret;
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	halSPISetPolarityPhase(1,1);		// ADXL345 operates in SPI(1,1)
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	ADXL_CS_LOW();
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	ADXL_CS_LOW();
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	spiSendByte(addr | ADXL_BYTE_READ);
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	spiSendByte(addr | ADXL_BYTE_READ);
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	spiReadFrame(&ret, 1);
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	spiReadFrame(&ret, 1);
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	ADXL_CS_HIGH();
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	ADXL_CS_HIGH();
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	halSPISetPolarityPhase(0,0);		// Revert back to SPI(0,0)
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	return ret;
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	return ret;
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}
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}
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/*
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/*
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 * Reads a 16-bit value of the register at the address
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 * Reads a 16-bit value of the register at the address
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 */
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 */
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int Read16SPI(unsigned char addr) {
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int Read16SPI(unsigned char addr) {
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	unsigned char recv[2];
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	unsigned char recv[2];
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	int ret;
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	int ret;
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	halSPISetPolarityPhase(1,1);		// ADXL345 operates in SPI(1,1)
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	ADXL_CS_LOW();
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	ADXL_CS_LOW();
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	spiSendByte(addr | ADXL_MULTI_BYTE_READ);
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	spiSendByte(addr | ADXL_MULTI_BYTE_READ);
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	spiReadFrame(recv, 2);
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	spiReadFrame(recv, 2);
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	ADXL_CS_HIGH();
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	ADXL_CS_HIGH();
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	halSPISetPolarityPhase(0,0);		// Revert back to SPI(0,0)
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	ret = recv[0];
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	ret = recv[0];
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	ret |= recv[1] << 8;
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	ret |= recv[1] << 8;
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	return ret;
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	return ret;
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}
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}
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/*
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/*
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 * Sets up and enables the tap interrupt
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 * Sets up and enables the tap interrupt
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 */
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 */
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void ADXLInitInterrupts(void) {
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void ADXLInitInterrupts(void) {
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	// Set tap acceleration threshold  (62.5mg/LSB, 0xFF=16g)
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	// Set tap acceleration threshold  (62.5mg/LSB, 0xFF=16g)
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	WriteSPI(ADXL345_REG_THRESH_TAP, 0x20);
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	WriteSPI(ADXL345_REG_THRESH_TAP, 0x18);
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	// Set maximum tap duration (625us/LSB)
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	// Set maximum tap duration (625us/LSB)
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	WriteSPI(ADXL345_REG_DUR, 0xFF);
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	WriteSPI(ADXL345_REG_DUR, 0xFF);
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	// Set minimum time for second tap (1.25ms/LSB)
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	// Set minimum time for second tap (1.25ms/LSB)
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/*
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/*
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 * Clears any active interrupt flags
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 * Clears any active interrupt flags
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 */
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 */
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void ADXLClearInterrupts(void) {
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void ADXLClearInterrupts(void) {
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	ReadSPI(ADXL345_REG_ACT_TAP_STATUS);
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	ReadSPI(ADXL345_REG_INT_SOURCE);
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	ReadSPI(ADXL345_REG_INT_SOURCE);
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}
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}
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/*
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/*
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 * Returns sensor data
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 * Returns sensor data