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#include <msp430.h>

#include <stdio.h>

#include <stdlib.h>

#include "hal_SPI.h"

#include "mmc.h"

#include "diskio.h"

#include "pff.h"

#include "player.h"

#include "adxl345.h"

/**

 * Takes an initialized DIR and returns the number of sub-dir and files

 */

FRESULT directory_info(char *path, int *dir_count, int *file_count) {

	FILINFO finfo;

	FRESULT result;

	DIR dir;

	*dir_count = 0;

	*file_count = 0;

	result = pf_opendir(&dir, path);

	if (result == FR_OK) {

		for (;;) {

			result = pf_readdir(&dir, &finfo);

			// Break upon end of list

			if (result != FR_OK || finfo.fname[0] == 0) break;

			// Increment the directory or file count

			if (finfo.fattrib & AM_DIR) {

				*dir_count = *dir_count + 1;

			} else {

				*file_count = *file_count + 1;

			}

		}

	}

	return result;

}

static int file_count, dir_count;

static char filename[16];

int main(void) {

    WDTCTL = WDTPW | WDTHOLD;	// Stop watchdog timer

    /* --- Set Oscillator Settings (8Mhz) --------------- */

    // Set DCO to 5, MOD to 0

    DCOCTL = CALDCO_16MHZ;

    // Set RSEL to 13

	BCSCTL1 = CALBC1_16MHZ;

	// MCLK = DCO/1, SMCLK = MCLK/1

	BCSCTL2 = SELM_0 | DIVM_0 | DIVS_0;

	// LFXT1 = VLOCLK, 1pF termination

	BCSCTL3 = LFXT1S_2 | XCAP_0;

	// Disable oscillator fault interrupt

	IE1 &= ~OFIE;

	/* -------------------------------------------------- */

	/* --- Initialize I/O Ports ------------------------- */

	P2SEL = 0x0;	// P2SEL resets to 0xC0

	// SPI Pins (idle low)

	SPI_PxOUT &= ~(SPI_SIMO + SPI_SOMI + SPI_UCLK);

	SPI_PxDIR |= SPI_SIMO + SPI_UCLK;

	SPI_PxDIR &= ~SPI_SOMI;

	SPI_PxREN |= SPI_SOMI;

	// SD Chip Select (idle high)

	MMC_CS_PxOUT |= MMC_CS;

	MMC_CS_PxDIR |= MMC_CS;

	// SD Card Detect (input)

	MMC_CD_PxDIR &= ~MMC_CD;

	// VS1053 Chip Select (idle high)

	VS10XX_CS_PxOUT |= VS10XX_CS;

	VS10XX_CS_PxDIR |= VS10XX_CS;

	// VS1053 Data/Command Select (idle high)

	VS10XX_DC_PxOUT |= VS10XX_DC;

	VS10XX_DC_PxDIR |= VS10XX_DC;

	// VS1053 DREQ Line (input)

	VS10XX_DREQ_PxDIR &= ~VS10XX_DREQ;

	// Accelerometer Chip Select (idle high)

	ADXL_CS_PxOUT |= ADXL_CS;

	ADXL_CS_PxDIR |= ADXL_CS;

	// Accelerometer Interrupt 1 (input)

	ADXL_INT1_PxDIR &= ~ADXL_INT1;

	ADXL_INT1_PxIES |= ADXL_INT1;	// Interrupt on High -> Low

	ADXL_INT1_PxIFG &= ~ADXL_INT1;	// Clear interrupt flag

	// Accelerometer Interrupt 2 (input)

	ADXL_INT2_PxDIR &= ~ADXL_INT2;

//	ADXL_INT2_PxIES |= ADXL_INT2;	// Interrupt on High -> Low

//	ADXL_INT2_PxIFG &= ~ADXL_INT2;	// Clear interrupt flag

//	ADXL_INT2_PxIE 	|= ADXL_INT2;	// Enable interrupt

	// Reset (idle low)

	CHIP_RESET_PxOUT &= ~CHIP_RESET;

	CHIP_RESET_PxDIR |= CHIP_RESET;

	// Red LED (idle low)

	LED_RED_PxOUT &= ~LED_RED;

	LED_RED_PxDIR |= LED_RED;

	// Green LED (idle low)

	LED_GREEN_PxOUT &= ~LED_GREEN;

	LED_GREEN_PxDIR |= LED_GREEN;

	// Initialize port 3 even though it doesnt exist on the device

	P3DIR = 0xFF;

	P3OUT = 0x00;

	/* -------------------------------------------------- */

	unsigned char status = 1;

	int acc_x, acc_y, acc_z;

	FATFS fs;

	FRESULT result = FR_NOT_READY;

	// Delay for a bit to ensure that SD card powers up

	__delay_cycles(16000);

	// Init SPI Module

	halSPISetup();

	// Attempt the startup procedure four times

	int i;

	for (i = 0; i < 4; i++) {

		// Initialize the accelerometer

		if (ADXLInit() == 0) {

			// Sum the accelerometer values to seed the randomizer

			ADXLRead(&acc_x, &acc_y, &acc_z);

			srand(acc_x + acc_y + acc_z);

			// Mount the SD card

			result = pf_mount(&fs);

			if (result == FR_OK) {

				// Acquire the number of subdirectories and files in the root directory

				result = directory_info("/", &dir_count, &file_count);

				if (result == FR_OK && file_count > 0) {

					CHIP_RESET_HIGH();

					if (VS1053Init() == 0) {

						LED_GREEN_HIGH();

						__delay_cycles(1000000);

						LED_GREEN_LOW();

						// If everything went well, play the first track

						status = 0;

						VS1053PlayFile("track1.mp3");

						break;

					} else { // VS1053Init()

						continue;

					}

				} else { // directory_info

					continue;

				}

			} else { // pf_mount()

				continue;

			}

		} else { // ADXLInit()

			continue;

		}

	}

	// If everything is ok, enable accelerometer interrupts

	if (status != 0) {

		// Otherwise turn off everything

		LED_RED_HIGH();

		void ADXLStandbyOn(void);

	} else {

		ADXL_INT1_PxIE 	|= ADXL_INT1;	// Enable interrupt

		ADXLInitInterrupts();

	}

//	LED_RED_HIGH();

	// Turn off all chips except the accelerometer

	CHIP_RESET_LOW();

	_BIS_SR(LPM4_bits + GIE);

	while(1);

}

#pragma vector=PORT1_VECTOR

__interrupt void Port1_Interrupt(void) {

	if (ADXL_INT1_PxIFG & ADXL_INT1) {

		LED_GREEN_HIGH();

		// Bring chips out of low-power state

		CHIP_RESET_HIGH();

		VSInitSoftware();

		// Play a random file

		int i = (rand() % file_count) + 1;

		snprintf(filename, 16, "track%d.mp3", i);

		VS1053PlayFile(filename);

		// Return chips to low-power state

		CHIP_RESET_LOW();

		// Clear the interrupts on the ADXL chip

		ADXLClearInterrupts();

		// Clear the interrupt flag

		ADXL_INT1_PxIFG &= ~ADXL_INT1;

		LED_GREEN_LOW();

	}

//	if (ADXL_INT2_PxIFG & ADXL_INT2) {

//		LED_RED_HIGH();

//		__delay_cycles(2000000);

//		LED_RED_LOW();

//

//		// Clear the interrupt flag

//		ADXL_INT2_PxIFG &= ~ADXL_INT2;

//	}

}