原创尼康热靴协议-4

 2012-6-12 17:40  1543 5 5 分类: 消费电子

INIT_2 (0xA2)

The third frame after power-on finishes the initialization process. After the camera issues the command 0xA2 the flash sends a surprising 45 byte long answer. The 45 bytes are the same for all different INIT_1 frames I have seen (see above). Sadly as for the other INIT frames I have no idea about the content, but I somehow doubt that there is that much data needed by the camera.

Byte	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32
dec	3	13	122	172	156	139	128	119	108	96	87	78	14	135	171	157	141	128	116	105	95	86	76	12	114	156	148	137	128	120	113	105
hex	03	0D	7A	AC	9C	8B	80	77	6C	60	57	4E	0E	87	AB	9D	8D	80	74	69	5F	56	4C	0C	72	9C	94	89	80	78	71	69

Byte	33	34	35	36	37	38	39	40	41	42	43	44	45
dec	98	91	11	111	156	148	139	128	119	113	103	98	92
hex	52	5B	0B	5F	9C	94	8B	80	77	71	67	62	5C

There is a pattern in this data: in the table below I sorted the data into four groups. Within one column (e.g. bytes 2, 13, 24, 35) the values actually "do not change much". Whatever that means. And there is a regularly appearing 128d.