From dafe4a4fe5b47213668b266451c04e8887289a21 Mon Sep 17 00:00:00 2001 From: clough42 Date: Sun, 11 Aug 2019 20:22:25 -0600 Subject: [PATCH] Update README.md --- README.md | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index 6497b77..7ff736b 100644 --- a/README.md +++ b/README.md @@ -71,6 +71,7 @@ A Step-direction stepper motor driver should be connected to the following GPIO * `GPIO0` (J8 pin 80) - Step * `GPIO1` (J8 pin 79) - Direction * `GPIO6` (J8 pin 78) - Enable +* `GPIO7` (J8 pin 77) - Alarm input #### Control Panel The LED&KEY control panel board **must be connected through a bidirectional level converter**, since @@ -84,5 +85,5 @@ well. In addition to the control wires for the hardware, the firmware also outputs signals on two additional GPIO pins to allow timing of the interrupt and loop routines. An oscilloscope or logic analyzer may be connected to these pins to debug and time the ISR routines: -* `GPIO7` (J8 pin 77) - Main state machine ISR -* `GPIO2` (J8 pin 76) - Secondary control panel loop +* `GPIO2` (J8 pin 76) - Main state machine ISR +* `GPIO3` (J8 pin 75) - Secondary control panel loop