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Update README.md

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philippe44
2021-01-24 00:28:56 -08:00
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README.md
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@@ -51,11 +51,12 @@ The board showed above has the following IO set
- key1: not sure, using GPIO36 in a matrix
- jack insertion: GPIO39 (inserted low)
- D4 -> GPIO22 used for green LED (active low)
- D5 -> GPIO19 as well
- The IO connector also brings GPIO5, GPIO18, GPIO19, GPIO21, GPIO22 and GPIO23
- JTAG and SD-card use GPIO13 and GPIO15 (see dip switches)
- JTAG also brings GPIO12 and GPIO14
(note that GPIOs need pullups)
- D5 -> GPIO19 as well (muxed with key3)
- The IO connector also brings GPIO5, GPIO18, GPIO19, GPIO21, GPIO22 and GPIO23 (don't forget it's muxed with keys!)
- The JTAG connector uses GPIO 12, 13, 14 and 15 (see dip switched) but these are also used for SD-card (and 13 is key2)
- It's alwats possible to re-use GPIOO (download at boot) and GPIO1/GPIO3 which are RX/TX of UART0 but you'll lose trace
(note that some GPIO need pullups)
So a possible config would be
- set_GPIO: 21=amp,22=green:0,39=jack:0