From: Keith Packard <keithp@keithp.com>
Date: Tue, 11 Oct 2011 23:44:40 +0000 (-0600)
Subject: altos/avr: Pull-up on the SPI slave select pin
X-Git-Tag: 1.0.9.3~8
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=e60c470b426b7be08a33133e7d8c94201d7e96d4

altos/avr: Pull-up on the SPI slave select pin

This makes the board work even when disconnected from TeleMetrum.

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/src/avr/ao_spi_slave.c b/src/avr/ao_spi_slave.c
index 76f574c6..3aa0b97f 100644
--- a/src/avr/ao_spi_slave.c
+++ b/src/avr/ao_spi_slave.c
@@ -87,7 +87,7 @@ ao_spi_slave_init(void)
 		 (1 << 3) |		/* MISO, output */
 		 (0 << 2) |		/* MOSI, no pull-up */
 		 (0 << 1) |		/* SCK, no pull-up */
-		 (0 << 0));		/* SS, no pull-up */
+		 (1 << 0));		/* SS, pull-up */
 #endif
 #if SPI_SLAVE_PIN_2_5
 	PCMSK0 |= (1 << PCINT2);	/* Enable PCINT2 pin change */
@@ -103,7 +103,7 @@ ao_spi_slave_init(void)
 		 (0 << 5) |		/* SCK, no pull-up */
 		 (1 << 4) |		/* MISO, output */
 		 (0 << 3) |		/* MOSI, no pull-up */
-		 (0 << 2));		/* SS, no pull-up */
+		 (1 << 2));		/* SS, pull-up */
 #endif	
 
 	SPCR = (0 << SPIE) |		/* Disable SPI interrupts */