WIZnet
Gainspan module evaluation with WIZwiki-W7500 using SerialPassthrough.
Dependencies: mbed
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SerialPassthrough_GainspanModule_W7500
by 
Steve Kim
This is a serial-passthrough example using WIZwiki-W7500 and gainspan-WiFi-module.
With this example, I can issue at-command-sets to the WiFi module with WIZwiki-W7500's serial. UART data flow is shown as below.
[PC Serial Terminal] <=> [WIZwiki-W7500's UIART1/DAP] <=> [WIZwiki-W7500's UIART0] <=> [Gainspan WiFi module]
Connected pins between WIZwiki-W7500 and WiFi-module are only 4 pins.
(3.3V, GND, UART-Tx, UART-Rx)
And, here is a picture.
And here is a captures of test logs. Red box is what I issued.
[PS] ASYNC_DEBUG is for internal-debugging like ISR. You can ignore it.
Diff: main.cpp
- Revision:
- 0:98000a7ccec5
- Child:
- 1:95a26b8d2887
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Aug 21 05:53:34 2015 +0000
@@ -0,0 +1,87 @@
+#include "mbed.h"
+#include "CBuffer.h"
+
+DigitalOut led1(LED1);
+DigitalOut led4(LED4);
+
+RawSerial pc(USBTX, USBRX); // tx, rx
+RawSerial dev(D1, D0); // tx, rx for WIZwiki-W75000
+
+////////////////////////////////////////////////////////////////////////////////////////////////
+// mbed Async Debug
+Timeout timer_buffer_debug;
+CircBuffer<char> async_debugbufer(1024);
+
+void print_debugbuffer()
+{
+ char c=0;
+ while ( async_debugbufer.available() ) {
+ async_debugbufer.dequeue(&c);
+ pc.putc(c);
+ }
+ timer_buffer_debug.attach(&print_debugbuffer, 0.1);
+}
+
+#include <stdarg.h>
+static char debug_line[64];
+void mbed_async_debug(const char *format, ...)
+{
+ va_list args;
+
+ va_start(args, format);
+
+ vsnprintf(debug_line, sizeof(debug_line), format, args);
+ int length = strlen(debug_line);
+
+ for (int i=0; i<length; i++)
+ async_debugbufer.queue(debug_line[i]);
+
+ va_end(args);
+}
+
+// mbed Async Debug Print, You can move below line to mbed-src.
+void (*dbg_f)(const char *format, ...);
+extern void (*dbg_f)(const char *format, ...);
+
+////////////////////////////////////////////////////////////////////////////////////////////////
+
+void dev_recv()
+{
+ led1 = !led1;
+ while(dev.readable()) {
+ pc.putc(dev.getc());
+ }
+}
+
+void pc_recv()
+{
+ led4 = !led4;
+ while(pc.readable()) {
+ dev.putc(pc.getc());
+ }
+}
+
+int main()
+{
+ for (int i=0; i<10; i++)
+ {
+ led1 = !led1;
+ led4 = !led4;
+ wait(0.1);
+ }
+
+ pc.baud(115200);
+ dev.baud(9600);
+
+ pc.printf("Serial Passthrough Started. \r\n");
+
+ dbg_f = &mbed_async_debug;
+ timer_buffer_debug.attach(&print_debugbuffer, 0.1);
+
+ pc.attach(&pc_recv, Serial::RxIrq);
+ dev.attach(&dev_recv, Serial::RxIrq);
+
+ while(1) {
+ wait(1);
+ }
+}