Softuart (#307)

* extras/softuart: support for multiple UARTs, dynamic RX/TX pins

examples/softuart/main.c

@@ -0,0 +1,40 @@
+/*
+ * Softuart example
+ *
+ * Copyright (C) 2017 Ruslan V. Uss <unclerus@gmail.com>
+ * Copyright (C) 2016 Bernhard Guillon <Bernhard.Guillon@web.de>
+ * Copyright (c) 2015 plieningerweb
+ *
+ * MIT Licensed as described in the file LICENSE
+ */
+#include <esp/gpio.h>
+#include <esp/uart.h>
+#include <espressif/esp_common.h>
+#include <stdio.h>
+//#include <FreeRTOS.h>
+//#include <task.h>
+
+#include <softuart/softuart.h>
+
+#define RX_PIN 5
+#define TX_PIN 4
+
+void user_init(void)
+{
+    // setup real UART for now
+    uart_set_baud(0, 115200);
+    printf("SDK version:%s\n\n", sdk_system_get_sdk_version());
+
+    // setup software uart to 9600 8n1
+    softuart_open(0, 9600, RX_PIN, TX_PIN);
+
+    while (true)
+    {
+        if (!softuart_available(0))
+            continue;
+
+        char c = softuart_read(0);
+        printf("input: %c, 0x%02x\n", c, c);
+        softuart_puts(0, "start\r\n");
+    }
+}