TS-7250-V3 DIO Header: Difference between revisions
From embeddedTS Manuals
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| 6 | | 6 | ||
| [[#SPI|spidev 4.0 Chip Select]] | | [[#SPI|spidev 4.0 Chip Select]] / [[#GPIO|GPIO Bank 5 IO 11]] | ||
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| 7 | | 7 | ||
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| [[#SPI|spidev 4.0 MISO]] | | [[#SPI|spidev 4.0 MISO]] / [[#GPIO|GPIO Bank 5 IO 10]] <ref>This pin is input only even when in the GPIO mode</ref> | ||
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| 11 | | 11 | ||
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| [[#SPI|spidev 4.0 MOSI]] | | [[#SPI|spidev 4.0 MOSI]] / [[#GPIO|GPIO Bank 5 IO 15]] | ||
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| [[#SPI|spidev 4.0 CLK]] | | [[#SPI|spidev 4.0 CLK]] / [[#GPIO|GPIO Bank 5 IO 14]] | ||
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| 15 | | 15 | ||
Revision as of 10:31, 21 July 2022
The DIO header is a 0.1" pitch 2x8 header including SPI and GPIO. All pins on this header are 5V tolerant except SPI output pins. All of these DIO includes pullups.
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The DIO header is designed to provide compatibility with the KPAD accessory. This is a 4x4 numerical keypad. This is supported in userspace with the keypad.c source code, or the "keypad" utility which is included in the shiping image.
This debounces presses to 50ms, and does not repeat when numbers are held. This will output a string containing the key that is pressed. Eg:
root@tsimx6:~# keypad 1 UP DOWN 2ND ENTER