mlx90641 drivers work, mlx90640 drivers don't... bad temperature conversion?

[luigi-grim]

Hello. I'm trying to implement the mlx90640 on a CC2538 texas instrument and a Contiki os.
I successfully implemented the mlx90641 getting an output like this:

DumpEE:
b0	899f	0	2031	5	320	3e0	161b	f6e3	6186	ad9	0	901	0	0	be33	
0	7f6	e	0	0	28b	222	281	164	1ad	1ad	1ad	4dd	525	542	554	
534	4da	7da	200	f0	1d	677	79a	164	4	12c	8	540	321	23	7ee	
1c	313	197	420	16	4b9	4b9	4b9	4b9	4b9	190	4b9	1f4	4b9	258	4b9	
7f9	7fd	4	14	b	9	e	d	3	1	7fc	0	7e1	7e8	7dc	7d6	
28	15	20	1a	1e	1f	28	1a	1e	1a	1e	e	9	7fe	7fc	7e9	
7fe	8	12	16	13	d	e	1e	b	d	8	13	7f7	7f7	7ef	7e3	
26	1b	21	21	20	27	2b	23	23	1f	27	19	15	c	8	7f9	
0	8	e	18	14	12	17	1f	d	16	c	15	7fc	7ff	7f5	7f4	
1d	10	1d	16	1d	21	26	1f	20	21	23	15	17	10	10	1	
7eb	7ff	7f9	c	5	5	9	14	a	6	8	15	7fd	0	7f9	2	
5	7fd	9	2	8	c	19	d	12	14	1c	13	14	f	10	2	
7d0	7db	7e1	7f7	7f1	7f0	7f2	4	7f6	7f8	7f9	d	7f5	7f6	7f6	4	
7e2	7db	7e7	7e6	7ec	7f1	7fa	7f5	7ff	2	10	1	4	1	6	6	
7a1	7b4	7bc	7ca	7c8	7c8	7d3	7db	7d5	7dc	7dc	7f4	7e8	7e9	7e8	7f8	
791	790	79d	797	7a3	7ac	7bc	7b1	7bf	7cb	7df	7d9	7e4	7e9	7f5	7ef	
581	619	67c	6d0	74f	78d	78b	7b7	7ae	7b3	76e	747	72c	6b6	641	5c0	
5cd	670	6db	74a	7a7	7e1	7dc	7f9	7f4	7fc	7af	78c	774	728	695	600	
5bf	659	6bb	740	7a6	7cd	7dc	7c4	7eb	7c2	7a5	762	74e	708	685	60d	
5e3	67e	6f7	743	7aa	7cc	7d9	7ed	7fc	7ff	7b5	784	765	730	6a9	617	
5d5	668	6e5	756	7b8	7ca	7d7	7d6	7ff	7c5	7c6	786	776	720	6af	61d	
5ee	685	6df	765	7a7	7db	7e0	7f4	7fe	7fd	7bd	794	768	732	69b	624	
5d0	649	6ea	73f	7af	7d8	7ed	7da	7ee	7ff	7ae	778	765	713	68c	609	
5ba	644	6aa	724	794	7d0	7b9	7e0	7de	7da	799	76c	72f	6df	660	5f1	
5aa	64e	6be	711	794	7d5	7ed	7e5	7ff	7f7	7c0	769	760	6ea	667	5dc	
568	5f9	668	6d6	732	786	7a5	7bb	7a9	7b2	755	73f	6ef	6a5	614	584	
58b	610	67f	6ef	76a	7ad	7c5	7f5	7fc	7e4	7bf	757	730	6af	633	5b5	
524	5b8	60a	69a	6dc	741	73c	782	77d	76d	715	704	6b1	65e	5bc	53c	
7a0	6e0	6bf	700	700	720	71f	6df	77e	71f	6df	79f	6fd	740	1f	61	
7a7	6e3	6c3	721	760	6e2	722	71f	77f	721	6e1	6ff	780	6e1	7a1	2	
7c0	7c1	7a1	7c0	7e0	73f	75e	7df	7be	77e	77d	bf	79d	3f	7df	61	
67	784	784	7a1	7a1	762	722	77f	77f	701	761	73e	79f	7a1	7a1	41	
21	7c2	7a0	0	1f	7ff	7de	1e	7fd	1e	79d	3e	77c	3e	1e	a1	
89	7a5	7e4	741	1	7c2	7e2	77f	7df	781	0	77e	7df	760	761	7e1	
83	c3	41	81	20	9f	3e	3e	7c	7e	79d	7e	7bc	3e	7be	a0	
12a	45	64	41	62	1	61	7be	7de	7a0	7ff	7be	1e	760	7a0	760	
105	144	e2	121	e0	9f	5e	fe	bc	5d	7fc	fd	3c	7fd	7de	7f	
1cc	87	65	c2	101	81	a0	5d	fd	7df	5f	7fd	7fe	79f	75f	7df	
128	185	162	161	140	15e	13d	fc	7b	9c	3c	7d	5c	79d	77d	7e0	
16c	147	143	e0	13e	11f	11d	9b	7c	7c	5d	7fc	75d	6ff	6ff	71f	
7f9	7fb	4	15	b	7	d	d	4	7ff	7fc	0	7e2	7e7	7db	7d6	
28	13	20	1a	1f	1e	28	1b	1f	18	1e	e	8	7fd	7fc	7e9	
7ff	7	12	16	14	c	e	1e	c	b	7	13	7f7	7f5	7ee	7e3	
27	1a	21	21	21	26	2b	23	24	1e	26	19	16	b	7	7f9	
1	7	e	18	15	12	16	20	e	15	d	16	7fd	7fe	7f5	7f4	
1e	f	1d	16	1e	20	26	1f	21	1f	24	16	18	f	f	1	
7ec	7fd	7f8	d	6	4	9	14	a	6	8	14	7fd	7fe	7f8	1	
6	7fc	9	3	8	b	19	c	12	13	1b	13	14	e	f	2	
7d1	7da	7e0	7f7	7f2	7ee	7f1	4	7f7	7f8	7f8	e	7f5	7f5	7f6	4	
7e4	7da	7e7	7e6	7ec	7f1	7fb	7f5	0	0	f	2	5	0	6	7	
7a2	7b3	7bc	7ca	7c9	7c7	7d2	7dc	7d6	7dc	7dd	7f5	7e9	7e8	7e8	7f9	
792	78f	79e	798	7a4	7ab	7bc	7b2	7c0	7cb	7e0	7db	7e6	7e8	7f6	7f0	
status Frame-synch:0
Get frame!
Status get_frame:0
Frame:
fe93	fe8f	fe92	fe9d	fe92	fe89	fe8d	fe8c	fe83	fe87	fe84	fe83	fe68	fe74	fe72	fe7b	
febe	fea6	feac	fea2	fea1	fe9f	feaa	fe98	fe9c	fe9f	fea5	fe90	fe8e	fe86	fe94	fe8f	
fe95	fe95	fe99	fe99	fe91	fe89	fe88	fe9a	fe82	fe92	fe8d	fe92	fe79	fe82	fe87	fe8c	
feed	fee1	fee3	fede	fed9	feda	fed7	fec5	febc	feb8	febd	fea2	fea0	fea1	fea7	fea0	
feec	fefa	ff05	ff11	ff0d	ff06	ff0f	ff14	fef7	fefd	fefb	fef7	fec8	feb9	feb0	feb1	
ff0d	ff06	ff1c	ff16	ff22	ff28	ff2d	ff27	ff03	ff0a	ff26	feff	feee	fee3	feea	fee7	
fec1	fede	fee2	fef8	feed	feeb	fefc	ff0b	fedb	fee7	fef3	fee7	fec0	fec2	fec9	fedc	
feb5	feaf	febe	feb2	feb3	febe	fed4	fec6	feba	feca	fed4	fec6	fec4	fec6	fecd	fec0	
fe83	fe8b	fe90	fea9	fea1	fea6	fea2	feb1	fe9c	fead	fea6	fecf	fec5	fecc	feb8	febb	
fe94	fe9f	fe9f	feb9	feb8	fef3	fec5	fecc	ff01	ff09	feea	ff4e	ff3b	fefa	feba	feb4	
fe54	fe69	fe74	fe76	fe7c	fe78	fe83	feae	fea7	fe8e	fec1	feae	fe8c	fe8f	fe92	fea4	
fe3d	fe3c	fe49	fe3c	fe4a	fe4e	fe64	fe59	fe64	fe71	fe88	fe7b	fe83	fe8b	fe9e	fe9c	
4e8c	7fff	7fff	7fff	7fff	7fff	7fff	7fff	fdda	f4fe	1e42	d7be	2	3	4	3	
1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	
665	1997	1997	1997	1997	1997	1997	1997	fdd5	cc69	ce7f	d6f9	2	ffff	a	5	
901	0	
Vdd: 3.29718
Ta: 22.912817
Temperature:
22.	22.	22.	22.	22.	22.	21.	22.	22.	22.	22.	22.	22.	22.	22.	24.	
22.	22.	22.	22.	22.	22.	22.	22.	22.	22.	22.	22.	22.	22.	23.	24.	
22.	22.	22.	22.	22.	22.	22.	22.	22.	22.	22.	22.	22.	22.	23.	24.	
27.	27.	27.	26.	26.	26.	25.	25.	24.	24.	24.	23.	23.	23.	24.	24.	
31.	31.	31.	31.	31.	30.	31.	30.	30.	29.	30.	29.	28.	26.	26.	26.	
31.	31.	32.	31.	32.	32.	32.	32.	29.	30.	31.	30.	28.	28.	29.	30.	
29.	29.	30.	30.	30.	29.	30.	30.	28.	29.	30.	28.	27.	27.	28.	29.	
25.	25.	26.	26.	25.	26.	26.	26.	25.	26.	26.	26.	26.	26.	26.	26.	
25.	25.	25.	26.	26.	26.	26.	26.	25.	26.	25.	27.	28.	28.	27.	26.	
25.	27.	26.	28.	28.	32.	28.	28.	31.	32.	29.	37.	36.	31.	25.	25.	
25.	26.	26.	25.	26.	26.	26.	28.	28.	26.	30.	26.	24.	24.	24.	24.	
24.	25.	25.	24.	25.	24.	25.	25.	25.	25.	25.	24.	24.	24.	24.	24.	
========================

But when i switched on the mlx90640 (of course with new main libraries, while i2c library is almost the same) i'm getting some strange results:

DumpEE:
c5	699f	0	2061	5	320	3e0	61a	f6f3	189	499	0	1901	0	0	be33	
4320	ffba	202	102	101	f1f1	e0f1	cfe0	f00	1	1	f001	f002	f1f2	e0f2	c0e1	
88a5	39e0	dca9	10fe	3322	3333	1122	ddff	fffe	0	1111	1121	1111	11	ff00	cdee	
1845	2fab	1956	a173	7656	f9cb	5c5c	5a5a	2463	f88d	17b3	63c	f600	9797	9797	2afa	
fcee	ff50	182e	ec9e	ff70	1e	10ce	f07e	fbfe	f80e	cc0	e49e	f53e	f700	111e	ecee	
f8be	e91e	c6e	e7ee	ec00	ec20	f8fe	dfee	f3c0	e750	7b0	e2de	e0a0	e3f0	3e0	d910	
18f2	175e	102c	1c90	1b70	140e	8ac	2050	1bf0	13fe	8bc	1860	1530	efe	d0c	20d0	
1ca2	4fe	87c	23e0	1012	82e	fcec	1bd0	17e0	36e	bbc	1ee0	8c0	e	7ce	1500	
2e	fb4e	146e	e86e	f7fe	fffe	8d0	e52e	fbde	f02e	89e	e04e	f8fe	f320	cf0	e8ce	
ed30	e58e	c4e	e7fe	efe0	ec10	f900	d87e	e810	e730	7e2	df4e	e86e	e3e0	3b0	d950	
2412	131e	103c	2040	13f0	13ee	4ce	1910	1ba0	fec	46c	1420	1cc0	afe	8cc	2090	
1110	13e	c3c	1fd0	13d2	ffe	f8ce	1430	13d2	6fe	bce	1b20	1020	3ce	7ae	1130	
840	fb70	1060	e8ae	ffc0	f8b0	8b0	e8ee	ffc0	fbc0	fbe	e05e	f9ae	f330	cbe	e96e	
f510	ec70	890	e48e	ec30	f400	f952	dcbe	ec50	e7b0	40	dbe0	e4de	e080	fc02	d980	
2432	b4e	86e	1470	1b90	88e	7c	1890	1ba0	f8e	bbc	1030	1550	ade	4bc	1940	
1500	83e	88e	1860	13e2	13b0	f92e	1080	1002	37e	42e	13c0	4d2	f870	7ce	1130	
14d0	17d0	3060	48e	17b0	1840	28a0	4de	17be	17f0	2840	fc6e	d7e	16c0	2cb0	c7e	
940	920	2480	43e	450	17c0	1510	f86e	c10	7f0	2090	ffc0	4b0	420	27f2	f9c0	
c82	39e	42e	1040	b72	40e	fc6e	1080	f72	79e	fc1c	c20	940	690	ae	1850	
4e0	fcce	4e	17f0	42	ba0	f0ee	c22	13e4	ffc0	fc7e	1382	882	3d0	37e	970	
cb0	1740	2c20	44e	bae	1bc0	20c0	be	1370	1780	27d0	fc5e	d00	ef0	2470	49e	
c70	4e0	2040	fc00	7a0	1390	10e0	f83e	bd0	3d2	1c20	ff4e	460	7e2	1fa2	f550	
f2	fb7e	f87e	860	ffc2	3de	ed0e	8f0	7d2	ffde	fbfe	470	530	fefe	f89e	10a0	
4b0	f520	f4be	c30	3e2	3be	e90e	852	802	f7f0	f46e	f92	492	fff0	ffb0	980	
1490	1722	2be0	4e	1ad0	1b92	1c40	6e	bfe	1352	1fd0	fffe	1470	ed0	1c70	48e	
c70	480	1ff0	ffbe	7e0	fe0	ca2	f0a0	3f0	3a0	c50	f3d0	fc20	10	1780	f520	
c2	f72e	f01e	fc72	702	fbb0	e86e	470	f810	fb50	ec1e	fc10	892	f6e0	f0ae	892	
92	f0be	f04e	bd2	fc12	f800	e0ee	fcb0	fc34	efde	ec70	fff0	fc52	f010	f3a0	140	
100	1352	1c00	f880	f40e	13b2	1430	fc20	390	802	1be0	f090	e0	b22	18b0	fcb0	
c0	d2	1810	f840	ffb0	bf0	490	f030	ffe2	ffd2	1022	f3d0	f892	fc40	13b2	f4f0	
8f2	730	42e	10a2	10	13b0	fc6e	1840	13a2	82e	e	10b2	14f2	b20	4be	20b0	
14c2	8ce	44e	1882	13d2	100e	f8be	1840	1bf2	bd0	830	1fd0	10b2	85e	bc0	20e2	
f0d0	f62	1050	f41e	fb50	f92	8c0	f450	f010	7b2	c12	f3e0	fcc0	ff72	1082	f4e0	
f8c0	fca2	13c0	f010	f3d0	772	fca2	ec10	f7a2	f7f0	812	eba0	f020	f422	b92	f0c0	
f8c2	fb40	f07e	832	372	3a0	e8ee	c62	fc22	3c0	f01e	ff2	8a2	fb7e	f4be	1112	
4e2	fc90	ffc0	1432	7e2	f8e	ecbe	1012	fb4	fff0	fc0e	17a0	c22	2e	fbc0	14d2	
f4b2	752	862	f070	e800	fcb0	fc70	e8c0	f7b0	f832	fff0	e4c0	f500	fb20	90	ecf0	
f4c0	f4e2	472	e860	e812	3b2	f8d0	e100	e870	f3e0	f820	eb80	e0ae	f792	ff62	ecb0	
f0b4	ef60	dc9e	fca2	ec02	ecc0	dc8e	fcc2	ffb2	f020	e7fe	f4c0	fcf2	f310	e8de	510	
e2	f0d0	ec9e	872	f422	ffc0	e0fe	112	f8a2	ec20	ec20	b60	f882	ff80	f760	cc2	
f0f0	1ba2	1832	b0	fbb0	1822	d02	c0	390	17b2	1bb2	fc10	d0	f42	18b2	120	
fd20	d12	1c42	420	f820	17a0	8b2	fc80	3d2	bc2	1bb2	340	fff0	1382	1752	470	
ecd2	fb70	f01e	892	fba2	410	e8de	ca2	392	b90	fbb0	13e2	4e2	330	f8be	1912	
502	e0	e	1c02	42	13d0	f0d0	14a2	fd2	7f0	7a0	2312	17e2	1370	360	2872	
dcd0	f44	482	f880	e080	c92	f972	f510	f3c0	462	fe0	f7f0	f500	ad2	8d0	fcc0	
e950	4a2	c82	ffc0	e870	842	f910	f070	f3b0	732	bb0	f740	f010	7b0	772	fca0	
d4a2	eb10	d460	f862	d872	ec60	cd6e	fcf2	ebf2	e880	e7ce	3f2	f4f2	f6e0	e4de	cb2	
ed62	f490	e89e	13d0	e8b2	f890	dcee	840	ff84	2f0	f380	1312	7f2	380	f340	1890	
f100	2724	1432	8b0	f800	27f2	1080	ca0	fc50	1c22	c50	b0	910	1f12	18b0	14e0	
510	18f2	2072	c60	fc90	2020	1470	810	ffc0	1b02	1b20	780	f430	1f52	16e0	1850	
e0e2	faf2	dc10	a2	ebc2	3c0	dc60	c82	f442	fc00	e070	f8e0	502	310	f490	14e0	
4f2	4d0	fc50	1c42	62	13e0	f050	1802	b72	ec0	6e0	1730	802	1720	aa0	2820	
Extract params done, status=:0 
Get frame!
Status get_frame:1
Frame:
ffd7 ffd7 ffdc ffd5 ffdd ffda ffde ffd5 ffdb ffd5 ffd8 ffc9 ffbf ffb8 ffbc ffb1 ffc0 ffb2 ffbd ffb1 ffbd ffb2 ffbf ffb0 ffc2 ffb3 ffc0 ffb0 ffbd ffb1 ffc2 ffac 
ffce ffcb ffcc ffd0 ffd3 ffce ffcc ffd2 ffd4 ffcc ffc3 ffc4 ffb2 ffac ffab ffad ffb7 ffa9 ffac ffad ffb6 ffa7 ffad ffae ffb9 ffa8 ffb1 ffad ffb7 ffa9 ffb5 ffaa 
ffd9 ffd7 ffdc ffd5 ffd9 ffd7 ffde ffd3 ffdb ffd4 ffd0 ffbe ffbb ffb3 ffba ffaf ffbc ffb0 ffba ffaf ffbd ffb1 ffbd ffad ffc0 ffb2 ffbf ffac ffbe ffaf ffc2 ffa9 
ffd0 ffcd ffca ffd2 ffd3 ffcf ffce ffd2 ffd3 ffcb ffb9 ffb3 ffb2 ffa9 ffab ffac ffb4 ffa8 ffa9 ffac ffb5 ffa7 ffac ffad ffb8 ffa8 ffaf ffab ffb8 ffa8 ffb3 ffa5 
ffdb ffd7 ffd9 ffd2 ffde ffd7 ffdc ffd5 ffda ffd4 ffc0 ffb2 ffb9 ffb3 ffba ffae ffbd ffb3 ffb9 ffac ffbd ffb1 ffb9 ffad ffbe ffb1 ffbb ffac ffba ffae ffc2 ffa9 
ffd1 ffcb ffc9 ffcf ffd3 ffcd ffcc ffd1 ffd0 ffc3 ffad ffab ffaf ffa7 ffa6 ffa9 ffb3 ffa9 ffa9 ffab ffb6 ffa7 ffaa ffa7 ffb6 ffa7 ffac ffa8 ffb4 ffa6 ffb2 ffa6 
ffd7 ffd7 ffd9 ffd5 ffda ffd8 ffda ffd2 ffd3 ffc4 ffb9 ffae ffb8 ffb3 ffb9 ffaf ffb6 ffaf ffb9 ffae ffb9 ffb0 ffb9 ffac ffbd ffaf ffbb ffad ffbc ffb0 ffc1 ffa7 
ffcc ffc9 ffc7 ffcd ffcf ffc9 ffca ffcd ffc4 ffb2 ffa4 ffa8 ffad ffa7 ffa6 ffa8 ffae ffa5 ffa7 ffa8 ffb1 ffa5 ffa7 ffa8 ffb4 ffa4 ffaa ffa9 ffb4 ffa4 ffb3 ffa3 
ffd4 ffd6 ffd8 ffd4 ffda ffd9 ffd9 ffcf ffc1 ffb5 ffb5 ffad ffb5 ffb0 ffb8 ffac ffba ffae ffb5 ffaa ffb8 ffae ffb5 ffab ffbb ffaf ffb8 ffac ffba ffaf ffbe ffa5 
ffca ffc7 ffc4 ffcc ffcd ffca ffc4 ffc7 ffb1 ffa5 ffa4 ffa8 ffab ffa3 ffa4 ffa5 ffae ffa1 ffa2 ffa6 ffaf ffa3 ffa4 ffa6 ffb3 ffa1 ffa9 ffa7 ffb2 ffa4 ffaf ffa3 
ffd4 ffd5 ffd6 ffd3 ffd9 ffd6 ffd2 ffc5 ffb5 ffb1 ffb2 ffad ffb5 ffaf ffb3 ffa9 ffb7 ffac ffb7 ffaa ffb7 ffad ffb6 ffaa ffba ffac ffb6 ffaa ffb8 ffab ffbb ffa6 
ffc8 ffc5 ffc0 ffc8 ffce ffc4 ffba ffb7 ffa7 ffa5 ffa0 ffa5 ffac ffa3 ff9f ffa3 ffae ffa1 ffa2 ffa6 ffad ff9f ffa3 ffa3 ffb0 ff9d ffa5 ffa1 ffaf ffa1 ffab ffa0 
ffd0 ffd4 ffd3 ffd0 ffd1 ffd1 ffc6 ffb7 ffb2 ffb0 ffb1 ffab ffb1 ffae ffb3 ffa8 ffb5 ffad ffb2 ffa8 ffb4 ffab ffb6 ffaa ffb9 ffab ffb8 ffa6 ffb6 ffaa ffbb ffa5 
ffc0 ffc1 ffbd ffc5 ffc1 ffc1 ffab ffa9 ffa5 ff9f ff9e ffa1 ffa6 ff9e ff9e ffa1 ffab ff9d ffa0 ffa0 ffaa ff9e ffa3 ffa4 ffaf ff9e ffa5 ffa3 ffad ff9e ffab ffa1 
ffcb ffd1 ffd1 ffcd ffcc ffcc ffb5 ffad ffad ffae ffb0 ffaa ffaf ffac ffb0 ffa7 ffb3 ffac ffb1 ffa6 ffb1 ffac ffb3 ffa7 ffb7 ffaa ffb7 ffa5 ffb5 ffa9 ffba ffa6 
ffbb ffbc ffb8 ffc3 ffbc ffb5 ff9b ffa2 ffa0 ff9d ff9a ffa2 ffa3 ff99 ff9a ffa0 ffa8 ff9c ff9e ff9f ffa8 ffa0 ffa1 ffa1 ffac ff9a ffa2 ffa1 ffab ff9d ffa8 ff9e 
ffcb ffce ffcc ffca ffc2 ffbd ffaf ffa9 ffb0 ffad ffaf ffa7 ffae ffac ffae ffa5 ffb4 ffab ffae ffa6 ffb3 ffab ffb2 ffa5 ffb3 ffaa ffb2 ffa7 ffb4 ffab ffb8 ffa5 
ffba ffb9 ffb1 ffbb ffb2 ffa3 ff98 ff9d ffa2 ff9b ff98 ff9d ff9f ff97 ff97 ff99 ffa6 ff9a ff9a ff9b ffa4 ff9a ff9c ff9c ffa7 ff99 ff9f ff9e ffa6 ff9e ffa6 ff9c 
ffc3 ffcc ffc8 ffc3 ffb6 ffb2 ffac ffa8 ffaa ffab ffae ffa7 ffa9 ffa8 ffad ffa3 ffaf ffa8 ffad ffa4 ffae ffaa ffaf ffa5 ffb2 ffa6 ffb6 ffa5 ffb1 ffaa ffb5 ffa5 
ffb2 ffb2 ffab ffb2 ffa2 ff9c ff91 ff9e ff9a ff97 ff94 ff9c ff9a ff95 ff95 ff99 ffa0 ff96 ff96 ff9b ffa0 ff99 ff9a ff9a ffa5 ff98 ff9e ff9c ffa8 ff9a ffa3 ff9c 
ffbb ffc8 ffbe ffbb ffa7 ffac ffa6 ffa6 ffa8 ffa9 ffaa ffa7 ffaa ffa9 ffaa ffa3 ffa9 ffa6 ffac ffa4 ffab ffa5 ffae ffa3 ffaf ffaa ffb2 ffa4 ffb1 ffa9 ffb5 ffa3 
ffa9 ffaf ffa1 ffaa ff92 ff93 ff8c ff96 ff95 ff90 ff92 ff96 ff98 ff94 ff90 ff98 ff98 ff94 ff93 ff9a ff9b ff92 ff95 ff9c ffa3 ff99 ff9c ff9c ffa3 ff9a ff9e ff9b 
ffb8 ffc4 ffb6 ffb1 ffa4 ffa9 ffa4 ffa2 ffa3 ffa6 ffa3 ffa1 ffa6 ffa7 ffa8 ffa1 ffab ffa5 ffa9 ffa2 ffaa ffa7 ffad ffa3 ffad ffa6 ffb1 ffa2 ffad ffa9 ffb2 ffa6 
ff9c ffa0 ff8c ff94 ff88 ff89 ff7f ff8b ff87 ff87 ff7f ff85 ff8d ff85 ff85 ff8a ff90 ff88 ff88 ff8e ff92 ff8a ff8b ff8e ff98 ff8d ff90 ff8d ff96 ff8f ff98 ff91 
4f51 197f 7fff 197f 7fff 197e 7fff 197e ffb8 cbbb 189d d666 fff7 8 ffff fffe 1948 3f7 25d 7fff 1948 3f7 25d 7fff 1 1 1 1 1 1 1 1 
65f 7fff 197f 7fff 197f 7fff 197e 7fff ffbe f4fc ce51 d70b 7 fffb fffb 0 f3 3f 2865 3d f3 3f 2865 3d 1 1 1 1 1 1 1 1 
1901 1 
Vdd: 3.04934
Ta: 20.430614
Temperature:
229 235 217 226 219 210 201 216 201 206 205 212 197 212 191 213 188 207 195 221 206 227 203 233 214 244 230 254 247 272 254 310 
266 241 237 242 235 228 222 232 224 222 213 227 220 218 209 228 219 221 213 231 228 230 218 244 226 245 234 265 255 270 272 309 
224 219 211 222 205 206 209 212 196 203 193 209 190 208 197 210 196 202 190 215 201 221 206 226 210 237 231 246 225 263 246 297 
256 237 229 235 230 224 229 227 219 207 210 223 212 214 207 223 209 216 207 227 223 223 225 238 231 239 239 257 247 263 263 298 
224 225 219 217 207 211 206 208 200 207 189 205 185 204 186 204 190 209 197 209 197 214 211 219 203 230 218 251 220 254 251 289 
251 235 239 235 28 28 29 28 225 88 23 125 111 217 0 36 0 0 127 22 0 155 22 134 52 2 140 23 23 23 23 24 
0 0 122 29 0 141 28 125 0 6 108 22 23 22 22 22 200 77 22 123 22 22 22 22 14 37 22 23 23 23 -33 15 
16 45 28 28 28 28 28 28 26 24 22 22 22 22 22 22 22 22 22 22 22 22 130 195 -17 16 16 16 23 22 24 23 
28 28 -99 185 29 28 28 28 24 22 -16 17 22 22 22 22 103 22 22 22 0 108 113 22 22 33 22 206 23 23 23 23 
28 28 28 0 28 28 28 27 255 116 129 24 22 22 22 22 22 22 251 187 22 22 22 22 22 22 0 207 23 23 23 23 
28 28 28 28 28 28 27 26 22 22 22 22 22 22 22 22 22 22 22 22 18 17 18 17 27 22 23 23 23 22 23 23 
28 28 28 28 28 27 26 25 22 22 0 184 22 22 22 22 22 22 22 22 22 22 0 192 22 22 22 22 23 23 154 242 
28 28 28 28 28 27 25 180 213 209 22 120 208 206 22 121 22 22 22 22 0 207 22 130 0 100 124 22 28 22 23 23 
28 28 0 206 27 27 24 23 22 22 22 22 22 22 0 86 22 22 0 194 22 22 262 198 6 101 141 23 63 23 23 23 
28 28 160 192 27 39 23 22 184 179 22 122 8 18 17 17 47 43 45 49 22 22 0 189 23 22 0 205 23 23 0 235 
28 28 0 204 26 26 0 193 22 22 0 188 22 22 0 189 22 22 0 190 22 23 0 198 22 22 0 211 23 23 0 244 
28 27 0 190 26 25 0 184 22 22 0 179 22 22 0 181 22 22 0 184 23 22 0 192 22 23 0 207 23 23 0 239 
28 28 0 208 26 24 0 199 22 22 0 195 22 22 0 194 22 22 0 195 22 22 0 202 22 23 0 219 23 23 0 250 
28 28 0 197 24 23 0 188 22 22 0 186 22 22 0 186 22 22 0 188 22 22 0 196 22 22 0 213 23 23 0 246 
28 27 0 217 24 23 0 207 22 22 0 201 22 22 0 200 22 22 0 202 22 23 0 209 22 23 0 225 23 23 0 256 
28 28 0 204 23 22 0 195 22 22 0 192 22 22 0 192 22 22 0 195 22 22 0 204 23 23 0 221 23 23 0 254 
28 28 0 227 22 22 0 214 22 22 0 209 22 22 0 208 22 22 0 210 22 22 0 218 23 23 0 235 23 24 0 267 
28 27 0 213 22 22 0 203 22 22 0 200 22 22 0 198 23 22 0 202 23 23 0 212 23 23 0 230 24 24 0 264 
28 27 0 247 22 22 0 235 22 22 0 231 22 22 0 228 22 22 0 228 23 23 0 238 23 23 0 258 23 24 0 292 
========================

eeprom and frame looks like reasonable values, but after the To conversion only some pixel are getting 22-23 degree that is correct reading, all the other are strongly out of range. I also tried "lookup table method" but i'm getting same results.
I have several sensors and several boards, so i already tried to change batteries, board or sensors, but I got same mistakes in same pixels.
CC2538 has only 32kB ram but "size" command gives:
text data bss dec hex filename
81868 1970 22452 106290 19f32 host.elf
So it looks like ok.
Any suggestions?

[slavysis]

Hi,

I tried the driver on several random MLX90640 devices and it is working.
I also used the EEPROM and the frame data that you provided to feed it in the driver functions and check the outcome.
I also did manual calculations as described in the datasheet. Both the manual calculations and the driver agree that based on that input data the temperatures should be:

Vdd = 3.305
Ta = 25.431
To = 28.763,28.694,28.991,28.945,28.804,28.724,28.632,28.502,28.323,27.966,27.542,26.696,23.479,22.934,22.378,22.758,22.697,22.404,22.676,23.043,22.640,22.874,23.113,23.062,23.201,23.211,23.235,23.437,23.614,23.597,23.598,24.736,28.719,28.244,29.382,28.696,28.575,28.522,28.642,28.664,28.472,28.138,26.866,26.346,22.657,22.649,22.475,22.636,22.402,22.477,22.782,22.540,22.720,22.584,22.622,22.914,22.880,22.889,23.332,23.049,23.685,23.680,24.214,24.496,28.863,28.706,28.944,28.961,28.197,28.197,28.814,28.449,28.186,28.001,26.274,24.932,22.699,22.388,22.352,22.713,22.721,22.433,22.277,22.817,22.775,22.825,22.878,22.870,23.359,23.132,23.181,22.966,23.482,23.265,23.715,24.044,28.414,28.705,28.765,28.734,28.712,28.730,28.984,28.761,28.181,28.007,25.304,23.579,22.407,22.451,22.773,22.582,22.605,22.651,22.195,22.687,22.661,22.534,22.767,23.090,23.022,22.794,23.059,23.016,23.526,23.555,23.811,23.591,28.701,28.557,28.447,28.246,28.642,28.207,28.371,28.538,27.768,27.612,23.367,22.928,22.520,22.493,22.427,22.691,22.626,22.592,22.419,22.445,22.892,22.557,22.291,22.801,22.903,23.073,22.713,23.328,22.978,23.201,24.058,24.122,28.478,28.562,28.811,28.600,28.284,28.553,28.733,28.536,27.600,26.636,23.108,22.472,22.401,22.205,22.193,22.579,22.359,22.476,22.507,22.831,22.929,22.435,22.544,22.310,22.762,22.941,22.800,22.978,23.466,23.695,23.663,23.912,28.713,28.585,28.338,28.873,28.203,28.322,27.948,28.116,26.895,25.110,22.487,22.523,22.922,22.380,22.362,22.694,22.097,22.263,22.678,22.843,22.661,22.460,22.544,22.866,22.792,22.820,22.844,23.394,23.466,23.458,23.437,23.745,28.535,28.419,28.546,28.335,28.214,28.005,28.472,28.119,26.109,24.168,22.238,22.237,22.656,22.449,22.456,22.422,22.295,22.470,22.583,22.553,22.889,22.533,22.452,22.732,22.493,22.708,22.932,23.241,23.317,22.901,24.167,23.781,28.430,28.355,28.265,28.609,28.620,28.438,28.022,27.722,24.144,22.684,22.054,22.449,22.497,22.340,22.599,22.637,22.593,22.340,22.264,22.595,22.525,22.376,22.121,22.765,22.690,23.076,22.533,23.241,23.128,23.320,23.286,23.571,28.620,28.385,28.468,28.451,28.313,28.311,28.058,27.407,23.388,22.428,22.444,22.643,22.540,22.218,22.502,22.345,22.325,22.245,22.358,22.627,22.575,22.589,22.352,22.627,22.732,22.605,23.159,23.103,23.172,23.165,23.567,23.821,28.019,28.140,28.070,28.558,27.806,27.919,27.062,26.099,22.606,22.228,21.952,22.461,22.171,22.220,22.177,22.204,22.165,22.037,22.764,22.610,22.434,22.457,22.486,23.021,22.923,22.584,22.975,23.518,23.157,22.795,23.112,23.812,28.224,28.191,28.117,28.235,28.164,27.632,26.629,24.986,22.334,22.596,22.352,22.501,22.528,22.579,22.089,22.395,22.523,22.407,22.525,22.803,22.480,22.351,22.560,22.714,22.805,22.302,22.857,22.824,23.009,23.230,23.400,23.631,28.174,28.125,28.069,28.371,27.901,27.425,25.442,23.964,22.419,22.462,21.962,22.685,22.384,22.255,22.361,22.386,22.361,22.386,22.142,22.506,22.261,22.306,22.817,22.986,22.922,22.608,23.137,22.791,23.010,22.817,23.349,23.581,27.867,28.200,28.121,28.227,27.450,27.474,24.685,23.168,22.299,22.360,22.514,22.412,22.421,22.301,22.416,22.410,22.548,22.107,22.691,22.557,22.466,22.513,22.880,23.013,22.784,22.650,23.017,23.176,23.243,23.062,23.841,23.824,28.026,27.769,28.220,28.072,26.962,26.776,23.172,22.646,22.319,22.275,22.312,22.466,22.220,22.446,22.194,22.564,22.367,22.371,22.276,22.495,22.283,22.586,22.665,22.641,22.908,22.793,23.319,22.963,23.168,23.008,23.560,24.010,27.716,27.849,28.108,28.276,26.666,26.170,22.920,22.521,22.363,22.332,22.531,22.663,22.401,22.186,22.428,22.920,22.725,22.413,22.657,22.532,22.641,22.954,23.054,22.838,22.774,22.501,23.008,23.167,23.006,23.246,24.067,23.832,27.901,27.643,27.752,27.743,25.967,24.961,22.612,22.481,22.556,22.605,22.746,22.509,22.358,22.528,22.478,22.531,22.638,22.511,22.306,22.802,22.911,22.566,22.637,22.857,22.772,22.918,23.114,23.281,23.758,23.309,23.736,23.978,27.959,27.892,27.814,27.431,25.846,24.035,22.856,22.353,22.597,22.654,22.644,22.863,22.235,22.108,22.402,22.262,22.529,22.556,22.693,22.359,22.631,22.624,22.711,22.727,22.825,22.997,23.175,23.115,23.013,23.558,23.801,23.801,28.139,27.850,27.822,27.250,24.613,23.228,22.802,22.609,22.346,22.350,22.686,22.731,22.307,22.347,22.612,22.670,22.804,22.329,22.407,22.579,22.723,22.852,22.765,22.945,22.854,22.520,23.791,23.226,23.282,23.264,23.477,24.401,28.210,27.583,27.372,26.780,23.963,23.118,22.514,23.158,22.395,22.230,22.423,22.754,22.357,22.398,22.675,22.701,22.675,22.528,22.444,22.768,22.775,22.923,23.010,22.823,22.893,23.121,23.287,23.054,23.516,23.321,24.232,23.977,27.693,27.800,26.984,26.231,23.041,22.662,22.596,22.726,22.617,22.666,22.449,22.975,22.891,22.537,22.708,22.715,22.589,22.190,22.845,22.795,22.841,22.496,23.241,23.040,22.944,23.288,23.740,23.550,23.843,23.623,24.348,24.370,27.774,27.905,26.895,26.111,22.560,22.545,22.839,22.416,22.521,22.416,22.853,22.343,22.605,22.608,22.612,22.919,22.314,22.579,22.918,23.009,22.910,22.755,22.944,23.597,23.157,23.328,23.803,23.778,23.247,24.107,23.952,24.655,27.779,27.514,26.303,25.118,22.728,22.314,22.401,22.224,22.591,22.379,22.591,22.799,22.652,22.644,22.959,22.642,22.980,22.465,22.762,23.119,23.117,23.083,23.116,23.299,23.441,23.007,24.269,23.917,24.458,23.974,24.530,25.328,27.895,27.461,25.653,24.638,22.801,22.599,22.510,22.485,22.320,22.646,22.538,22.561,22.725,22.233,22.707,22.891,22.536,22.545,22.850,23.181,23.003,22.982,23.029,23.185,23.491,23.475,23.526,23.772,23.657,24.072,24.891,25.171

You mentioned that you started off of the MLX90641 deriver working. Is it possible that you somehow mixed-up the two drivers?

Best regards

[luigi-grim]

Thank you very much for your time, I could focus on libraries since my reading is correct and I realized the T0 computation screws calculation when it starts using kTa and Kv arrays. In fact those arrays doesn't look right at all. I will look better into their calculation, maybe my C dialect makes something wrong, but I have a big doubt: according to the excel file with example values, kTa and kV should be both 0.something, so float, but in the params struct their type is actually int8_t. If I force those data to zero in the T0 calculation the reading is very good, probably with little errors here and there. Any idea why they are int in the params struct instead of float, as the excel example suggest they should be?

[slavysis]

HI, indeed the xls file is not valid anymore - since the update for reducing the RAM footprint.
You first need to calculate the correct Vdd and Ta values. For the input data you shared Vdd should be 3.305 and Ta should be 24.31.
In your case you have error in Vdd (which maybe explains the error in Ta). So I would suggest that you first look into Vdd.

Best regards