Gerrie de Jager
This is a RS485 class that uses the second UART and was tested on a Nucleo F030R8. A main demo program howto use the class is included. This class control the direction pin on the transceiver buffer automatically, and used transmit and receive interrupts. Ring buffers (256 bytes) are implemented on both transmission and reception. It assumes a ADM3485 'type' buffer where pins 2 ans 3 are connected and seen as direction. This test program could easily be adapted as base for other programs.
Diff: main.cpp
- Revision:
- 0:044dfba47660
- Child:
- 1:7091401482c5
diff -r 000000000000 -r 044dfba47660 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Nov 11 16:01:12 2014 +0000
@@ -0,0 +1,88 @@
+#include "mbed.h"
+#include "dlms_comms.h"
+// instantiate classes
+Timer timer;
+// debug serial comms
+RawSerial debugger(SERIAL_TX, SERIAL_RX);
+// rs485 comms 2nd uart
+dlms_comms dlms;
+
+DigitalOut myled(LED1);
+
+#define POLL_TIME_MS 100
+
+/** -------------------------------------------------------------------------
+ * @brief the setup routine runs once when you press reset
+ */
+void setup(void)
+{
+ // initialize serial communication at 115200 bits per second:
+ debugger.baud (115200);
+ debugger.format();
+ debugger.printf ("\r\n\n>> DCU Battery Charger Nov 2014 \r\n");
+ timer.start();
+ dlms.init ( &debugger, &timer);
+ dlms.initialise (9600, // baudrate
+ 8, // bits,
+ 'n', // parity
+ 2); // stop_bits
+ debugger.printf (">> Setup Done \r\n");
+}
+/** ---------------------------------------------------------------------------
+ * @brief M A I N
+ */
+int main(void)
+{
+ // timer to do some timing
+ UINT_64 compare_ms = 0l;
+ UINT_64 current_ms;
+ bool direction_485 = false;
+ char ch;
+
+ // initialise
+ setup();
+ debugger.printf (">> Demo .. \r\n");
+ do
+ {
+ current_ms = timer.read_ms();
+ current_ms -= compare_ms;
+ if (current_ms > POLL_TIME_MS)
+ {
+ compare_ms += POLL_TIME_MS;
+ if (myled)
+ myled = false;
+ else
+ myled = true;
+ }
+ if (direction_485 != dlms.get_dir485())
+ {
+ direction_485 = dlms.get_dir485();
+ debugger.printf("\r\nDir Changed ");
+ if (direction_485)
+ debugger.printf("1 \r\n");
+ else
+ debugger.printf("0 \r\n");
+ }
+// if (debugger.readable())
+// {
+// ch = debugger.getc();
+// switch (ch)
+// {
+// case '1':
+// dlms.send_packet ("\r\nDLMS Test 1 \r\n", 16);
+// break;
+// }
+// debugger.printf ("ret_irq_count = %ld\r\n", dlms.ret_irq_count());
+// }
+// if (dlms.char_available())
+// {
+// debugger.printf("Rx Char ");
+// debugger.printf("%c\r\n", dlms.get_char());
+// }
+// dlms.poll_rs485();
+ }
+ while (1);
+}
+ //----[ then end]-------------------------------------------------------------
+
+
\ No newline at end of file