From 6cd967ea22bae878d7727965e4888f8c2d4aaf4e Mon Sep 17 00:00:00 2001
From: Neil Gershenfeld <gersh@cba.mit.edu>
Date: Thu, 29 Dec 2022 12:55:49 -0500
Subject: [PATCH] add ESP32C3
---
GPIO/ESP32/ring.ESP32C3.ino | 48 +++++++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
create mode 100644 GPIO/ESP32/ring.ESP32C3.ino
diff --git a/GPIO/ESP32/ring.ESP32C3.ino b/GPIO/ESP32/ring.ESP32C3.ino
new file mode 100644
index 0000000..60b2c53
--- /dev/null
+++ b/GPIO/ESP32/ring.ESP32C3.ino
@@ -0,0 +1,48 @@
+//
+// ring.ESP32C3.ino
+// ESP32C3 ring oscillator test
+// connect GPIO 8 and 20
+//
+// Neil Gershenfeld 12/26/22
+//
+// This work may be reproduced, modified, distributed,
+// performed, and displayed for any purpose, but must
+// acknowledge this project. Copyright is retained and
+// must be preserved. The work is provided as is; no
+// warranty is provided, and users accept all liability.
+//
+
+uint32_t input,output;
+
+void setup() {
+ pinMode(8,OUTPUT);
+ output = (1 << 8);
+ input = (1 << 20);
+ }
+
+void loop() {
+ //
+ // direct port I/O version
+ // 3.79 MHz at 160 MHz clock
+ //
+ /**/
+ while (1) {
+ if (GPIO.in.val & input)
+ GPIO.out_w1tc.val = output;
+ else
+ GPIO.out_w1ts.val = output;
+ }
+ /**/
+ //
+ // Arduino version
+ // 736 kHz at 166 MHz clock
+ //
+ /*
+ while (1) {
+ if (digitalRead(20))
+ digitalWrite(8,LOW);
+ else
+ digitalWrite(8,HIGH);
+ }
+ */
+ }
--
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