From: Keith Packard <keithp@keithp.com>
Date: Sun, 9 Apr 2017 19:53:34 +0000 (-0700)
Subject: altos: Drive row low instead of high in matrix driver
X-Git-Tag: 1.7~47
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=24cd5dd33ccf65c1b277911c460a89ec2b52e421

altos: Drive row low instead of high in matrix driver

Driving it high won't work all that well as we're looking for zero bits.

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

diff --git a/src/drivers/ao_matrix.c b/src/drivers/ao_matrix.c
index e0f8ba75..fa2d0c57 100644
--- a/src/drivers/ao_matrix.c
+++ b/src/drivers/ao_matrix.c
@@ -89,9 +89,9 @@ _ao_matrix_read_cols(void)
 static uint8_t
 _ao_matrix_read(uint8_t row) {
 	uint8_t	state;
-	_ao_matrix_drive_row(row, 1);
-	state = _ao_matrix_read_cols();
 	_ao_matrix_drive_row(row, 0);
+	state = _ao_matrix_read_cols();
+	_ao_matrix_drive_row(row, 1);
 	return state;
 }