comparison: content/hp34970a_3.rst
content/hp34970a_3.rst
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| 7 :Tags: HP, 34970A, DMM, repair, test equipment | 7 :Tags: HP, 34970A, DMM, repair, test equipment |
| 8 :series: HP 34970A repair | 8 :series: HP 34970A repair |
| 9 :series_index: 3 | 9 :series_index: 3 |
| 10 | 10 |
| 11 | 11 |
| 12 As explained in `the previous post in this series <{filename}/hp34970a_2.rst>`_, | 12 As explained in `the previous post in this series <{static}/hp34970a_2.rst>`_, |
| 13 I've started to sniff the serial protocol between the main board and | 13 I've started to sniff the serial protocol between the main board and |
| 14 the display panel so I can replace the failed VFD by an OLED or TFT | 14 the display panel so I can replace the failed VFD by an OLED or TFT |
| 15 display managed by an arduino or similar. | 15 display managed by an arduino or similar. |
| 16 | 16 |
| 17 Protocol | 17 Protocol |
| 120 wanted to have my serial protocol to debug the code for the beginning, | 120 wanted to have my serial protocol to debug the code for the beginning, |
| 121 I've used the SoftwareSerial_ library for this prototype. | 121 I've used the SoftwareSerial_ library for this prototype. |
| 122 | 122 |
| 123 The result is this beautiful clean setup: | 123 The result is this beautiful clean setup: |
| 124 | 124 |
| 125 .. image:: {filename}/images/hp34970a/poc_display.jpg | 125 .. image:: {static}/images/hp34970a/poc_display.jpg |
| 126 :alt: A very quick proof of concept of an arduino based display replacement for the HP34970A. | 126 :alt: A very quick proof of concept of an arduino based display replacement for the HP34970A. |
| 127 | 127 |
| 128 | 128 |
| 129 As you can see, it works: I have the main content od the VFD display | 129 As you can see, it works: I have the main content od the VFD display |
| 130 on my TFT module! | 130 on my TFT module! |
| 131 | 131 |
| 132 .. image:: {filename}/images/hp34970a/poc_display_mux_off.jpg | 132 .. image:: {static}/images/hp34970a/poc_display_mux_off.jpg |
| 133 :alt: The FTF display showing the main area and the current channel area. | 133 :alt: The FTF display showing the main area and the current channel area. |
| 134 | 134 |
| 135 .. image:: {filename}/images/hp34970a/poc_display_vdc.jpg | 135 .. image:: {static}/images/hp34970a/poc_display_vdc.jpg |
| 136 :alt: The same with the channel 209 configured as VDC, 6.5digits. | 136 :alt: The same with the channel 209 configured as VDC, 6.5digits. |
| 137 | 137 |
| 138 | 138 |
| 139 The job is far from finished however: I still have to figure out how | 139 The job is far from finished however: I still have to figure out how |
| 140 the "annotation" flags are encoded and display them, and most | 140 the "annotation" flags are encoded and display them, and most |
