| author | Tero Marttila <terom@paivola.fi> |
| Mon, 21 Apr 2014 00:20:27 +0300 | |
| changeset 82 | b5878197d017 |
| parent 30 | 5226e512755c |
| permissions | -rw-r--r-- |
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359c1771c366
add dip8 module for reading bitfields from SPI
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
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1 |
;; |
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359c1771c366
add dip8 module for reading bitfields from SPI
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
2 |
;; Reading DIP switches from SPI |
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359c1771c366
add dip8 module for reading bitfields from SPI
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
3 |
;; |
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359c1771c366
add dip8 module for reading bitfields from SPI
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
4 |
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359c1771c366
add dip8 module for reading bitfields from SPI
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
5 |
.set DIP_BUFFER = spi_inbuf + 1 |
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359c1771c366
add dip8 module for reading bitfields from SPI
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
6 |
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359c1771c366
add dip8 module for reading bitfields from SPI
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
7 |
;; Read state of dip switches |
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359c1771c366
add dip8 module for reading bitfields from SPI
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
8 |
;; Output: r16 |
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359c1771c366
add dip8 module for reading bitfields from SPI
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
9 |
DIP_Read8: |
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359c1771c366
add dip8 module for reading bitfields from SPI
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
10 |
; update |
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30
5226e512755c
Use Timer0 for async SPI updates (semi-useful)
Tero Marttila <terom@fixme.fi>
parents:
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diff
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11 |
; rcall SPI_SendRecv |
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27
359c1771c366
add dip8 module for reading bitfields from SPI
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
12 |
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359c1771c366
add dip8 module for reading bitfields from SPI
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
13 |
; get bits |
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359c1771c366
add dip8 module for reading bitfields from SPI
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
14 |
lds r16, DIP_BUFFER |
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359c1771c366
add dip8 module for reading bitfields from SPI
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
15 |
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359c1771c366
add dip8 module for reading bitfields from SPI
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
16 |
ret |
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359c1771c366
add dip8 module for reading bitfields from SPI
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
17 |