Sending 32bytes until array is finished ?

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Guys,

 

How can I send 32 bytes each until array is finished, because the buffer is limited until 32bytes....but I can't get it right sending 32 bytes,

Please have look to the code I have written,

Any clues ?

 

Thanks in advance

const unsigned char HelloMP3[] __attribute__ ((progmem))= {
	0xFF,0xF2,0x40,0xC0,0x19,0xB7,0x00,0x14,0x02,0xE6,0x5C, /* ..@.......\ */
	0x01,0x92,0x68,0x01,0xF1,0x5E,0x03,0x08,0xF0,0x24,0x80, /* ..h..^...$. */
	0x05,0x9E,0x20,0xC6,0xFC,0x12,0x32,0x5C,0xBF,0xF9,0xB9, /* .. ...2\... */
	0x20,0x4A,0x7F,0x85,0xEC,0x4C,0xCD,0xC7,0x27,0xFE,0x5C, /*  J...L..'.\ */
	0x34,0x25,0xCB,0xE6,0xFF,0xFF,0x8E,0x42,0xE1,0xA0,0x5E, /* 4%.....B..^ */
	0xCA,0x6E,0x30,0x9F,0xFF,0xF8,0xC2,0x12,0x84,0xB9,0x7C, /* .n0.......| */
	0xDC,0x61,0x09,0x4A,0x7F,0xFF,0xFF,0xF9,0x7D,0x32,0x51, /* .a.J....}2Q */
	0x09,0x7C,0xE1,0xA5,0x6E,0xB4,0xFF,0xFF,0xFF,0xFF,0xD3, /* .|..n...... */
	0x34,0x41,0x91,0xF0,0x11,0x8F,0x00,0x0F,0x81,0x9C,0x10, /* 4A......... */
	0xEE,0x59,0xCE,0x56,0x67,0xFF,0xF2,0x42,0xC0,0xEC,0x53, /* .Y.Vg..B..S */
	0x09,0x15,0xF9,0xAA,0xA8,0x0D,0xD9,0x40,0x00,0xCA,0x34, /* .......@..4 */
	0x53,0xD9,0x18,0xAB,0x7D,0xF7,0x89,0x3F,0x11,0x38,0x94, /* S...}..?.8. */
	0x82,0x59,0x93,0x20,0x6A,0x0C,0xEE,0x8E,0x58,0xFA,0x38, /* .Y. j...X.8 */
	0x82,0xCA,0xF0,0x58,0xBB,0xDA,0x0C,0x50,0x56,0x1F,0xBB, /* ...X...PV.. */
	0x18,0x5D,0x8B,0x9F,0xDA,0x71,0x4F,0xFF,0xBD,0xFE,0xEF, /* .]...qO.... */
	0x69,0x36,0x86,0x3C,0x50,0xBB,0x0A,0x07,0x89,0x54,0xF0, /* i6.<P....T. */
	0x88,0x9F,0x90,0x95,0x30,0x94,0x2E,0x7E,0xF0,0x64,0x96, /* ....0..~.d. */
	0x79,0x08,0x3E,0x20,0x97,0x28,0x34,0x9C,0x09,0x7F,0xD2, /* y.> .(4.... */
	0xC0,0x01,0x75,0xF8,0x05,0x6B,0x5F,0x41,0x17,0x0B,0xE7, /* ..u..k_A... */
	0xFF,0xF2,0x40,0xC0,0x61,0xE5,0x0B,0x16,0x09,0xC6,0xC5, /* ..@.a...... */
	0x74,0x7B,0xCC,0x94,0x7A,0xF7,0x80,0x76,0xB2,0xD2,0xF8, /* t{..z..v... */
		0x39,0x06,0x38,0xFD,0x71,0xC5,0xDE,0x3A,0x38,0xBF,0xD5, /* 9.8.q..:8.. */
		0xF7,0x12,0x37,0xCB,0xF5,0x63,0x0C,0x9B,0xCE,0x77,0x25, /* ..7..c...w% */
		0xED,0xFB,0x3D,0x6B,0x35,0xF9,0x6D,0xD7,0xF9,0x2C,0xD1, /* ..=k5.m..,. */
		0x97,0x15,0x87,0x93,0xA4,0x49,0x4A,0x18,0x16,0x07,0xA1, /* .....IJ.... */
		0x60,0xF7,0x52,0x94,0xDB,0x02,0x16,0x70,0xB2,0xD8,0x80, /* `.R....p... */
		0x30,0xC2,0x94,0x40,0x81,0x74,0x5A,0x19,0x7A,0x80,0x60, /* 0..@.tZ.z.` */
		0x41,0x21,0x46,0x95,0xD5,0xC4,0x40,0xD2,0x01,0xC0,0x01, /* A!F...@.... */
		0xDA,0xD9,0xA0,0xB1,0x01,0xFF,0xF2,0x42,0xC0,0x82,0x10, /* .......B... */
		0x0B,0x12,0xF9,0x9E,0xC9,0x7E,0x7A,0xC6,0x95,0x55,0x09, /* .....~z..U. */
		0x8B,0x19,0x5E,0x8B,0x26,0xCA,0xEB,0x68,0x8A,0x05,0x8F, /* ..^.&..h... */
		0x36,0xA5,0xA5,0x03,0xB8,0x9C,0xED,0x24,0x51,0x59,0x90, /* 6......$QY. */
		0xF6,0xC5,0x7D,0xB5,0xAD,0xAF,0xF6,0x3B,0x18,0xEF,0x3F, /* ..}....;..? */
		0xFF,0xFF,0x4E,0xDE,0x16,0x66,0x0B,0xAA,0x33,0x23,0xDD, /* ..N..f..3#. */
		0x9C,0x4E,0x6E,0x55,0x22,0x9D,0xA2,0x40,0xA6,0x36,0x31, /* .NnU"..@.61 */
		0x69,0xA5,0xE1,0xD9,0x7F,0xF7,0xC6,0xCC,0x48,0x00,0x0E, /* i.......H.. */
		0x90,0x16,0x00,0x0F,0xDE,0x6E,0x80,0x11,0x0C,0x9A,0x4F, /* .....n....O */
		0x56,0xDB,0x88,0xD3,0xB2,0x1C,0x00,0xE0,0x2E,0x3E,0xAC, /* V........>. */
		0xFF,0xF2,0x40,0xC0,0x1C,0xE5,0x19,0x13,0x31,0x4E,0xCD, /* ..@.....1N. */
		0x9E,0xC3,0x06,0x71,0x03,0x85,0xE5,0xB5,0x6D,0x88,0x50, /* ...q....m.P */
		0x8E,0x0E,0x17,0x3B,0x19,0xFB,0x4E,0x3B,0x99,0xEF,0x4C, /* ...;..N;..L */
		0x9E,0xF7,0x7B,0x31,0x7C,0x3C,0x5F,0xFF,0xF4,0xF8,0xE3, /* ..{1|<_.... */
			0x92,0x42,0x07,0x8E,0x83,0x8E,0x0F,0x05,0x08,0x91,0xA3, /* .B......... */
			0x16,0xE2,0xDF,0xB7,0x62,0x60,0x48,0x31,0x3C,0xFF,0xD4, /* ....b`H1<.. */
			0x9E,0x0C,0x68,0x00,0x77,0x54,0xE3,0x1E,0x05,0xC5,0xF8, /* ..h.wT..... */
			0xEA,0x8D,0x82,0x9D,0x08,0xA9,0x06,0x8D,0x1E,0x5D,0x7C, /* .........]| */
			0x7F,0x08,0xC0,0x50,0x45,0x42,0xD0,0x36,0xF8,0xB2,0x4D, /* ...PEB.6..M */
			0x53,0x0C,0x80,0x3B,0x4D,0xFF,0xF2,0x42,0xC0,0x2F,0x3C, /* S..;M..B./< */
			0x25,0x19,0x29,0xFE,0xBC,0x2E,0xC4,0xD0,0x99,0x4C,0x48, /* %.)......LH */
			0xB0,0x9C,0x49,0xD2,0x1A,0x2D,0x02,0xC2,0x79,0x69,0x16, /* ..I..-..yi. */
			0x92,0xA8,0xC5,0xAB,0x45,0x5A,0x68,0xE8,0x75,0x57,0xCD, /* ....EZh.uW. */
			0xF1,0xB9,0xAA,0x13,0x88,0xE4,0x87,0x42,0x15,0xB3,0x58, /* .......B..X */
			0xF5,0xA3,0x46,0xB1,0xCF,0xD3,0x59,0x7E,0xBA,0xB5,0xA7, /* ..F...Y~... */
			0x6B,0x0B,0x17,0x57,0x6B,0x5C,0x4A,0xCD,0x53,0x76,0x2A, /* k..Wk\J.Sv* */
			0x1D,0x28,0xC5,0x1C,0x76,0x5C,0xDD,0x0A,0x00,0x4B,0xC0, /* .(..v\...K. */
			0x1B,0xCA,0xA8,0xE9,0x81,0x5B,0xA6,0xDC,0xA4,0x59,0x13, /* .....[...Y. */
			0xFC,0xBA,0x8F,0x98,0x79,0x44,0x25,0xC9,0x35,0x38,0xCA, /* ....yD%.58. */
			0xFF,0xF2,0x40,0xC0,0xB9,0x7D,0x1A,0x13,0x79,0x6A,0xC8, /* ..@..}..yj. */
			0x3E,0xC4,0x46,0x94,0x8D,0x3C,0x67,0x85,0xB1,0xA8,0x89, /* >.F..<g.... */
			0xC0,0xF2,0xE6,0x2F,0x9D,0x7C,0xC9,0xB4,0xBE,0xCF,0xE1, /* .../.|..... */
			0x7D,0xFE,0x1F,0x03,0x00,0x12,0x84,0x72,0x8C,0xE7,0xD8, /* }......r... */
			0x5E,0xC9,0xA9,0x01,0xBA,0x9B,0xC4,0x10,0x5C,0x70,0x2E, /* ^.......\p. */
			0x6C,0x48,0xE7,0x8C,0x15,0x0B,0x06,0x01,0xE5,0xFF,0xFF, /* lH......... */
			0xD4,0x0D,0x00,0x0F,0xCE,0x58,0x95,0x61,0xA8,0x9E,0x7B, /* .....X.a..{ */
				0x19,0x98,0xB0,0xF0,0xC6,0x72,0x82,0xD5,0x27,0x06,0x47, /* .....r..'.G */
				0x41,0x22,0x0F,0x65,0x93,0xC9,0x8A,0x09,0x19,0x48,0x1B, /* A".e.....H. */
				0xBD,0xD6,0x64,0x1A,0xAC,0xFF,0xF2,0x42,0xC0,0xF1,0x11, /* ..d....B... */
				0x25,0x14,0x22,0x06,0xBC,0x0E,0xD4,0x4E,0x99,0x90,0xA8, /* %."....N... */
				0xD8,0xB7,0xAD,0x5D,0x3E,0xAF,0x6E,0xBE,0x66,0x83,0xA4, /* ...]>.n.f.. */
				0xE3,0xC2,0xE0,0x29,0x43,0x87,0x5F,0x4F,0x27,0x9C,0x2C, /* ...)C._O'., */
				0xD0,0x91,0xF3,0x87,0x9B,0x54,0xED,0xD1,0xB4,0xF3,0x39, /* .....T....9 */
				0x87,0x22,0x06,0x86,0x0D,0x71,0xE4,0x6F,0x2A,0x08,0x04, /* ."...q.o*.. */
				0xC0,0x03,0x2A,0xB1,0xE2,0x05,0x4D,0x64,0xA1,0x9C,0xA6, /* ..*...Md... */
				0x0D,0x41,0xA6,0xF2,0x7A,0xC1,0x30,0xC3,0x38,0x26,0x09, /* .A..z.0.8&. */
				0x50,0x08,0xC4,0xF6,0x30,0x0C,0xA6,0xA9,0x17,0x00,0x13, /* P...0...... */
				0x0C,0xDC,0xC4,0x2F,0x28,0xEB,0x3F,0xCD,0x7A,0x3D,0x2F, /* .../(.?.z=/ */
				0xFF,0xF2,0x40,0xC0,0x18,0x6F,0x2E,0x13,0xA1,0xF2,0xBC, /* ..@..o..... */
				0x36,0xCB,0x4E,0x99,0x6E,0xFC,0xEE,0xC5,0xF0,0xA0,0xB7, /* 6.N.n...... */
				0x92,0xD4,0xEE,0x79,0x7C,0x50,0x5D,0xE5,0x04,0x94,0xA9, /* ...y|P].... */
				0x76,0xCF,0x6C,0x70,0xDD,0x0D,0xD4,0xEE,0xED,0x98,0xE8, /* v.lp....... */
				0xC8,0x35,0x36,0x7A,0x0C,0x05,0x80,0x03,0xBC,0xBE,0x91, /* .56z....... */
				0x00,0x7C,0xAE,0x65,0xB8,0x91,0xA3,0x33,0xBA,0x68,0x60, /* .|.e...3.h` */
				0xD4,0x1A,0x66,0xF8,0x43,0xA0,0x20,0x89,0xE7,0x80,0xD8, /* ..f.C. .... */
				0x1E,0x4F,0xA0,0x04,0x60,0x06,0x0A,0xA4,0x91,0x24,0xFA, /* .O..`....$. */
				0x9F,0x57,0x53,0xF4,0x7A,0xDB,0x5F,0x56,0xE3,0x6E,0x0B, /* .WS.z._V.n. */
				0x8B,0x3A,0x1C,0xF9,0x5E,0xFF,0xF2,0x42,0xC0,0xB1,0x00, /* .:..^..B... */
				0x38,0x14,0x09,0xEE,0xB4,0x36,0xD3,0x4E,0x99,0xA4,0x78, /* 8....6.N..x */
				0x94,0x73,0xC4,0x66,0x30,0xF5,0xEA,0xDB,0xBA,0x67,0x67, /* .s.f0....gg */
				0x95,0x6B,0xAB,0x68,0x5D,0x08,0xA1,0x39,0x56,0xAB,0x1E, /* .k.h]..9V.. */
				0xD5,0x03,0xE8,0x01,0x70,0x00,0xB3,0x93,0x33,0x19,0x8C, /* ....p...3.. */
				0x61,0x8F,0xBB,0x5D,0x24,0x12,0x63,0xD3,0x4B,0x5D,0x91, /* a..]$.c.K]. */
				0x08,0x43,0x22,0x56,0x1A,0xC5,0x10,0x21,0x84,0xA8,0xEA, /* .C"V...!... */
				0x80,0xBF,0x16,0x8E,0x3D,0x46,0x18,0x9C,0x6E,0x9A,0x91, /* ....=F..n.. */
				0xE6,0xC9,0x6F,0xD2,0x7D,0x27,0xD7,0xE9,0x6B,0xFF,0x0A, /* ..o.}'..k.. */
				0x03,0x43,0x89,0xD5,0xBF,0x52,0x97,0x0A,0x25,0x95,0x0D, /* .C...R..%.. */
				0xFF,0xF2,0x40,0xC0,0xF5,0xC3,0x41,0x13,0x81,0xEE,0xA8, /* ..@...A.... */
				0x5E,0xD3,0x44,0x98,0xFC,0xCF,0x97,0xF9,0x58,0xB5,0x33, /* ^.D.....X.3 */
				0xB1,0x85,0x47,0x86,0xD7,0x98,0x01,0x3B,0xA3,0x4F,0x7E, /* ..G....;.O~ */
				0x04,0xA6,0xC3,0x39,0x21,0x70,0x27,0x62,0xB5,0x18,0x10, /* ...9!p'b... */
				0x09,0x99,0x00,0x8B,0x7E,0xF2,0xBF,0x52,0x18,0x26,0x30, /* ....~..R.&0 */
				0x1C,0xB0,0x01,0x49,0x30,0xE0,0xC3,0x11,0x46,0x05,0xCC, /* ...I0...F.. */
				0x49,0x14,0x28,0xB2,0xED,0x4B,0x57,0x5A,0x2F,0xB7,0x46, /* I.(..KWZ/.F */
				0x63,0x34,0xD2,0xDA,0x9F,0x56,0x32,0xB7,0xA2,0x25,0xFF, /* c4...V2..%. */
				0x94,0x28,0x33,0x7F,0x3B,0xC4,0x50,0xEC,0xB1,0xE2,0x26, /* .(3.;.P...& */
				0xA1,0xB7,0x07,0x7F,0xFB,0xFF,0xF2,0x42,0xC0,0x67,0x6A, /* .......B.gj */
				0x4C,0x13,0xF9,0x6A,0x90,0x7E,0xDB,0x44,0x94,0x3F,0xFF, /* L..j.~.D.?. */
				0x14,0xD6,0x2A,0xFF,0xFF,0xC1,0x34,0x8C,0x48,0x22,0x00, /* ..*...4.H". */
				0x06,0x8F,0x21,0xFD,0x64,0x60,0x04,0x92,0x42,0xEA,0x74, /* ..!.d`..B.t */
				0x32,0x37,0xAA,0x5A,0x9F,0x67,0x01,0x8B,0x3F,0x37,0x31, /* 27.Z.g..?71 */
				0xDD,0x06,0x3C,0x01,0x34,0x30,0xE0,0x5C,0x78,0x78,0xCB, /* ..<.40.\xx. */
				0xD6,0xF1,0x31,0x8A,0x69,0x61,0x93,0x92,0x42,0xCE,0x4B, /* ..1.ia..B.K */
				0xC5,0x02,0x4E,0x73,0xC6,0x24,0x30,0xCD,0x08,0x66,0xC6, /* ..Ns.$0..f. */
				0x35,0xAB,0xA2,0x3D,0x2F,0xB3,0xBD,0x34,0x87,0x13,0xEE, /* 5..=/..4... */
				0x71,0x45,0x68,0xFA,0xEA,0x05,0x84,0x41,0x36,0x4C,0x9A, /* qEh....A6L. */
				0xFF,0xF2,0x40,0xC0,0xC9,0x92,0x56,0x13,0xD0,0x6E,0x70, /* ..@...V..np */
				0x54,0xD3,0xCC,0x28,0x06,0xD7,0x0E,0xA4,0x1D,0x9C,0x9D, /* T..(....... */
				0xD9,0xA9,0x88,0x7B,0xB5,0xA3,0x56,0xB7,0x4B,0x4B,0x5A, /* ...{..V.KKZ */
					0x9B,0x2C,0xA9,0xAD,0x6F,0x99,0x6C,0xC0,0x4C,0x14,0x14, /* .,..o.l.L.. */
					0xEF,0xB4,0x20,0x91,0x5F,0xBC,0x81,0x41,0x41,0x5D,0xD4, /* .. ._..AA]. */
					0x20,0xBD,0x05,0x1A,0x6F,0xE2,0x68,0x56,0x41,0x41,0x57, /*  ...o.hVAAW */
					0xF9,0xBF,0x89,0x82,0x8E,0xC7,0x8F,0x0A,0x0A,0x09,0x37, /* ..........7 */
					0xF1,0x05,0x0A,0x0A,0x0A,0x0A,0x09,0x05,0x37,0xFF,0x10, /* ........7.. */
					0x50,0x50,0x53,0x65,0xFF,0xFF,0xFD,0x75,0xDF,0xFF,0xFF, /* PPSe...u... */
					0x68,0x4F,0xFF,0x84,0x70,0xFF,0xF2,0x42,0xC0,0x27,0x50, /* hO..p..B.'P */
					0x5F,0x17,0xE8,0x82,0x3C,0x11,0x58,0x18,0x01,0x55,0x48, /* _...<.X..UH */
					0xBC,0x52,0xFC,0x4A,0x4C,0x3C,0xD5,0xF6,0x11,0x2D,0xBF, /* .R.JL<...-. */
					0xEA,0x03,0x5C,0x57,0x29,0xBF,0xC3,0x75,0x1C,0xE6,0xDD, /* ..\W)..u... */
					0xBF,0xED,0xEF,0xD0,0x98,0x77,0x71,0x95,0x73,0xFF,0xED, /* .....wq.s.. */
					0x54,0xBE,0xD5,0xEE,0xAE,0xC2,0xD5,0x0B,0xFF,0xF1,0x97, /* T.......... */
					0x8A,0xE4,0x42,0x09,0x99,0xB1,0xEA,0x94,0xDC,0x78,0xB5, /* ..B......x. */
					0x34,0x0F,0xF1,0x8F,0xFC,0x15,0xF6,0xFA,0xB1,0x47,0xA9, /* 4........G. */
					0x6C,0x67,0x43,0x8B,0xF2,0x76,0x22,0xED,0xDA,0x85,0xBA, /* lgC..v".... */
					0x2F,0xC7,0xF9,0xCF,0xFC,0xDB,0x46,0x2E,0x50,0x0A,0x84, /* /.....F.P.. */
					0xFF,0xF2,0x40,0xC0,0xC6,0x4A,0x59,0x28,0x2B,0x19,0xE0, /* ..@..JY(+.. */
					0x01,0x89,0x78,0x00,0x52,0x85,0x3C,0x8E,0x54,0x9A,0x48, /* ..x.R.<.T.H */
					0x5A,0x72,0x32,0x94,0xBF,0x43,0x4F,0x24,0x53,0x4B,0xEC, /* Zr2..CO$SK. */
					0x4B,0x99,0x0E,0x66,0x1F,0xFF,0xCE,0x7F,0xFF,0x3F,0x10, /* K..f.....?. */
					0xAE,0x82,0x62,0x71,0x34,0x18,0x59,0x9B,0x51,0xC7,0x59, /* ..bq4.Y.Q.Y */
					0xCE,0xEE,0xA5,0xFE,0x02,0xBB,0x30,0x91,0x49,0xD5,0x4B, /* ......0.I.K */
					0xF3,0xDC,0x9A,0xA9,0x57,0x8E,0x72,0x10,0xC0,0x5D,0x60, /* ....W.r..]` */
					0x67,0xFC,0x7D,0xD6,0xBA,0xDD,0xB3,0x8B,0x5A,0x0A,0x4C, /* g.}.....Z.L */
					0x41,0x4D,0x45,0x33,0x2E,0x39,0x33,0xAA,0xAA,0xAA,0xAA, /* AME3.93.... */
					0xAA,0xAA,0xAA,0xAA,0xAA,0x54,0x41,0x47,0x48,0x65,0x6C, /* .....TAGHel */
					0x6C,0x6F,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, /* lo          */
					0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, /*             */
					0x20,0x20,0x20,0x20,0x20,0x50,0x61,0x6E,0x75,0x2D,0x4B, /*
					0x72,0x69,0x73,0x74,0x69,0x61,0x6E,0x20,0x50,0x6F,0x69, /*
					0x6B,0x73,0x61,0x6C,0x6F,0x20,0x20,0x20,0x20,0x20,0x20, /*
					0x20,0x20,0x56,0x53,0x44,0x53,0x50,0x20,0x54,0x65,0x73, /*
					0x74,0x69,0x6E,0x67,0x20,0x20,0x20,0x20,0x20,0x20,0x20, /*
					0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, /*
					0x20,0x20,0x20,0x4D,0x50,0x33,0x20,0x48,0x65,0x6C,0x6C, /*
					0x6F,0x2C,0x20,0x57,0x6F,0x72,0x6C,0x64,0x21,0x20,0x20, /*
					0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, /*
					0x00, /* . */
				};
while (p <= &HelloMP3[sizeof(HelloMP3)-1])

		{
			loop_until_bit_is_set(VS1053B_PIN,VS1053B_DREQ);
				VS1003B_XDCS_L();
                             for(j=0;j<32;j++)                    //32 Bytes each time
                                 { 
			              VS1003B_WriteByte(pgm_read_byte(p++));
                                 } 
		}
        

 

Last Edited: Tue. Dec 29, 2015 - 06:14 AM
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p is uninitialized.

 

Also, I suspect your limit on p is wrong.

Clearly it will not work unless HelloMP3 is a multiple of 32 bytes.

Iluvatar is the better part of Valar.

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p = HelloMP3;

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how can I determine limit of p ? thanks

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that array has 1695 bytes..

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Ah-ha. This explains why we have not seen you for a while.
Typing that array must have kept you busy.

Assuming that you have initialised p.
Your code looks about right to me. You are comparing addresses. Using correct types is important.
I would probably initialise a counter to the sizeof your array. Then decrement it in the loop.

The loop condition is going to overrun the array. 1696 bytes would be a 53 blocks of 32 bytes.

It is more intuitive to loop from 0 to < count rather than 0 to <= count-1

I have no idea what your VS1003B macros do. Can they hang?

Last Edited: Tue. Dec 29, 2015 - 08:25 AM
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Hi David,

 

I don't understand with

" I would probably initialise a counter to the sizeof your array. Then decrement it in the loop.

The loop condition is going to overrun the array. 1696 bytes would be a 53 blocks of 32 bytes.

It is more intuitive to loop from 0 to < count rather than 0 to <= count-1 "

 

Can you write it in a code please ?

I'm following what datasheet says,

"

If DREQ is high, VS1053b can take at least 32 bytes of SDI data or one SCI command.
DREQ is turned low when the stream buffer is too full and for the duration of an SCI command.

"

thanks

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Something like:

int count = sizeof(HelloMP3);
unsigned char *p = (unsigned char *)HelloMP3;
while (count > 0)
{
    loop_until_bit_is_set(VS1053B_PIN,VS1053B_DREQ);
    VS1003B_XDCS_L();
    for(j = 0; j < 32; j++)                    //32 Bytes each time
    { 
        VS1003B_WriteByte(pgm_read_byte(p++));
    }
    count -= 32;
}

There is not much difference.   I presume that you want 53 passes.  i.e. 52 with 32 bytes and the 53rd with 31 good bytes and 1 byte of garbage.

 

Your array looks a nightmare.    Did you type it by hand?

If it was auto generated,   it makes sense to use a sensible number of bytes per line.   And sensible comments.

From what you pasted,  it looks like unmatched comments.

 

David.

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I will give a try this afternoon, and keep posted, thanks

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I tried porting this to atmega128, but no luck yet, I can hear some noise at the earphone, but not yet "hello"

Last time I did with VS1003, but no luck with VS1053 yet...

 

Any experience with it ? thanks

 

Link:

http://www.vsdsp-forum.com/phpbb/viewtopic.php?f=11&t=65

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Why don't you just use DREQ as "OK to send"?

"> 7.3 Data Request Pin DREQ
The DREQ pin/signal is used to signal if VS1003’s FIFO is capable of receiving data. If DREQ
is high, VS1003 can take at least 32 bytes of SDI data or one SCI command. When these
criteria are not met, DREQ is turned low, and the sender should stop transferring new data.
Because of the 32-byte safety area, the sender may send upto 32 bytes of SDI data at a
time without checking the status of DREQ, making controlling VS1003 easier for low-speed
microcontrollers.

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.

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Do you mean :

 loop_until_bit_is_set(VS1053B_PIN,VS1053B_DREQ);

will be outside of

 

while (p <= &HelloMP3[sizeof(HelloMP3)-1]) 

loop ?

 

Thanks

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bianchi77 wrote:

... because the buffer is limited until 32bytes....but I can't get it right sending 32 bytes,

...

 

I don't know exactly what "isn't right".  You are using

VS1003B_WriteByte

but the examples I found with a Google search wrap that with e.g. VS1003B_WriteDAT which takes care of fussing with the control signals.  This thread https://www.avrfreaks.net/forum/v... is similar to yours, and talks of the setup and timing.

 

jesper says that the chip has a buffer of like 16kbits, which makes sense.  (otherwise, there is no way that e.g. an SD card sector could be fetched in 32 byte times)  The DREQ drops when the buffer is nearly full. With your array, I'd guess that you are never going to fill the buffer.

 

Some examples use a pointer; most use array indexing.  While I might not do things exactly the way the sample codes I found do it, they claim to be working.  Once all the setup is done, "play song" seems to be not much more than:

 

-- Get sector from SD card into "buffer"

-- Dump 32 bytes when DREQ says you can, repeating until "buffer" is exhausted

 

I see you have been poking at this for a while https://www.avrfreaks.net/forum/h...

I might suggest that you go back to where you found your driver routines, and use the sample program there.  The only modification you should need is to get the next byte from flash instead of the more typical SD-card sector buffer.

 

http://alexandrosdermenakis.com/...

https://www.youtube.com/watch?v=...

http://www.vsdsp-forum.com/phpbb...

...

 

 

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.