From a916944e270b07d83725ed0d045bcd46fa0fa91d Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Wed, 6 Jan 2016 20:50:21 +0100
Subject: Update comments on GPS connection

---
 src/fsm/gps.h   | 10 ++++------
 src/fsm/usart.c |  6 +++++-
 2 files changed, 9 insertions(+), 7 deletions(-)

(limited to 'src')

diff --git a/src/fsm/gps.h b/src/fsm/gps.h
index 82f8a77..b1f023a 100644
--- a/src/fsm/gps.h
+++ b/src/fsm/gps.h
@@ -27,15 +27,13 @@
 #ifndef __GPS_H_
 #define __GPS_H_
 
-/* Setup GPS receiver over I2C and parse time */
+/* Setup GPS receiver over USART and parse time */
 
-/* I2C connections:
- * SCL on PB6
- * SDA on PB9
+/* USART connections:
+ * board TX to GPS RX on PD8
+ * board RX to GPS TX on PD9
  */
 
-#define GPS_I2C_ADDR 0x42 // I2C address of GPS receiver
-
 struct gps_time_s {
     uint16_t  year;   // Year, range 1999..2099 (UTC)
     uint8_t   month;  // Month, range 1..12 (UTC)
diff --git a/src/fsm/usart.c b/src/fsm/usart.c
index 013c4db..d12b51f 100644
--- a/src/fsm/usart.c
+++ b/src/fsm/usart.c
@@ -31,7 +31,11 @@
 #include "task.h"
 #include "queue.h"
 
-// USART 3 on PD8 and PD9
+/* USART 3 on PD8 and PD9
+ *
+ * board TX to GPS RX on PD8
+ * board RX to GPS TX on PD9
+ */
 const uint16_t GPIOD_PIN_USART3_TX = GPIO_Pin_8;
 const uint16_t GPIOD_PIN_USART3_RX = GPIO_Pin_9;
 
-- 
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