From 4568db72dc3f9694ecae3506fc3de6ffc948b24f Mon Sep 17 00:00:00 2001
From: lonkaars <loek@pipeframe.xyz>
Date: Wed, 24 May 2023 15:51:25 +0200
Subject: WIP zumo<-nicla communication

---
 nicla/serial_test.py | 21 +++++++++++++++++++++
 zumo/zumo.ino        |  7 +++++--
 2 files changed, 26 insertions(+), 2 deletions(-)
 create mode 100644 nicla/serial_test.py

diff --git a/nicla/serial_test.py b/nicla/serial_test.py
new file mode 100644
index 0000000..bef43a2
--- /dev/null
+++ b/nicla/serial_test.py
@@ -0,0 +1,21 @@
+from pyb import Pin, delay
+
+zumo_tx = Pin("PA10", Pin.IN)
+zumo_rx = Pin("PA9", Pin.OUT_PP)
+
+def uart_send(s):
+    zumo_rx.value(0)
+    byte = ord(s)
+    print("START BIT")
+    delay(2)
+    for x in range(8):
+        bit = (byte & (1 << 7)) >> 7
+        byte <<= 1
+        zumo_rx.value(bit)
+        print(f"BIT[{x}] = {bit}")
+        delay(2)
+    print("STOP BIT")
+    zumo_rx.value(1)
+
+while True:
+    uart_send("a")
diff --git a/zumo/zumo.ino b/zumo/zumo.ino
index f59bd36..c65c2f9 100644
--- a/zumo/zumo.ino
+++ b/zumo/zumo.ino
@@ -5,6 +5,9 @@
 #include "protocol.h"
 #include "pid.h"
 
+#define DUI_PINOUT_NICLA_TX 13
+#define DUI_PINOUT_NICLA_RX 14
+
 dui_state_t g_dui_target_state = {
 	.steer = 1.0f,
 	.speed = 1.0f,
@@ -19,6 +22,8 @@ dui_state_t g_dui_current_state = {
 };
 
 void setup() {
+	pinMode(DUI_PINOUT_NICLA_TX, OUTPUT);
+	pinMode(DUI_PINOUT_NICLA_RX, INPUT_PULLUP);
 }
 
 void loop() {
@@ -29,6 +34,4 @@ void loop() {
 	apply_pid(&g_dui_target_state, &g_dui_current_state);
 
 	apply_state(&g_dui_current_state);
-
-	delay(10);
 }
-- 
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