steeven lee / BufferedSerial

Inherit from Serial and use software buffers for TX and RX. This allows the UART peripherals to operate in a IRQ driven mode. Overrides most (but not all) stdio functions as Serial did

Dependencies:   Buffer

Dependents:   mbed_esp8266_demo

Fork of BufferedSerial by Sam Grove

Files at this revision

API Documentation at this revision

Revision 11:9c34df035d99, committed 2015-05-03

Comitter:
steeven
Date:
Sun May 03 02:48:55 2015 +0000
Parent:
10:9ee15ae3d1a3
Commit message:
Make putc blocking; Add read line function

Changed in this revision

BufferedSerial.cpp Show annotated file Show diff for this revision Revisions of this file
BufferedSerial.h Show annotated file Show diff for this revision Revisions of this file 
diff -r 9ee15ae3d1a3 -r 9c34df035d99 BufferedSerial.cpp
--- a/BufferedSerial.cpp	Wed Jan 07 18:37:11 2015 +0000
+++ b/BufferedSerial.cpp	Sun May 03 02:48:55 2015 +0000
@@ -52,9 +52,36 @@
 
 int BufferedSerial::getc(void)
 {
+    while (!readable() && !SERIAL_BASE::readable())
+        ;
     return _rxbuf;
 }
 
+
+char* BufferedSerial::readl(char *s, int size) 
+{
+    if (s == NULL || size <= 0)
+        return NULL;
+
+    char* ptr = s;
+
+    while (1) {
+        if (readable()) {
+            if ((size--) > 0) {
+                *ptr = _rxbuf;
+                if (*ptr == '\n' || *ptr == 0) {
+                    break;
+                }
+                ptr++;
+            } else
+                goto end;
+        }
+    }
+    if (size > 0)
+        *ptr = 0;
+    end: return s;
+}
+
 int BufferedSerial::putc(int c)
 {
     _txbuf = (char)c;

diff -r 9ee15ae3d1a3 -r 9c34df035d99 BufferedSerial.h
--- a/BufferedSerial.h	Wed Jan 07 18:37:11 2015 +0000
+++ b/BufferedSerial.h	Sun May 03 02:48:55 2015 +0000
@@ -114,6 +114,14 @@
      */
     virtual int getc(void);
     
+    /**
+     * Read a line from the BufferedSerial Port.
+     * @param s The string buffer to read from Serial Port
+     * @param size the max number to read from Serial Port
+     * @return the string read from Serial Port
+     */
+    char* readl(char *s, int size);
+
     /** Write a single byte to the BufferedSerial Port.
      *  @param c The byte to write to the Serial Port
      *  @return The byte that was written to the Serial Port Buffer