blob: c884330a3db4b8863ee81e4829b4b9ffaee72762 (
plain)
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
33
34
35
36
37
38
39
40
41
42
|
This is an example capture of a Macronix MX25L1605D (MX25L1605DPI-12G)
SPI flash chip (16MBit == 2Mbyte; NOR flash) that is being written to.
The SPI programmer hardware used is openbiosprog-spi, see
http://randomprojects.org/wiki/Openbiosprog-spi
The software used for programming it is flashrom, see
http://flashrom.org/FT2232SPI_Programmer
The command line used was
flashrom -p ft2232_spi:type=2232H,port=A -w filename
where 'filename' is a 2MByte file filled with lots of consecutive "HelloWorld"
ASCII character strings.
The logic analyzer used for capturing is a ChronoVu LA8 at a sample rate
of 25MHz. The capture was done using sigrok (11/2011) via
sigrok-cli -d 0:samplerate=25mhz --samples 8388608 \
-p '1=CS#,2=MISO,3=SCLK,4=MOSI,5=WP#,6=HOLD#' \
-o mx25l1605d_write_hello_world.sigrok
The ChronoVu LA8 probes were connected like this to the MX25L1605D chip:
Probe SPI chip pin
------------------------
0 (green) CS#
1 (orange) SO/SIO1 (a.k.a MISO)
2 (white) SCLK
3 (red) SI/SIO0 (a.k.a MOSI)
4 (gray) WP#/ACC
5 (brown) HOLD#
GND GND
The capture is only partial, it contains a small part of the write process
(it does not contain the chip identification, chip erase, etc. which comes
before the actual write parts; it also does not contain anything after that,
the flashrom command took quite a bit longer than what the capture shows).
|
