TeamA
Finite State Machine move between STATE virtual com port USB connect to PC while UART connect to modem
Fork of
USBSerial_HelloWorld
by 
Samuel Mokrani
Revision 10:a358762e1188, committed 2015-11-22
- Comitter:
- oxtek
- Date:
- Sun Nov 22 09:44:43 2015 +0000
- Parent:
- 9:d88699a0905a
- Commit message:
- usb as virtual com port connect to PC and UART connect to modem
Changed in this revision
--- a/USBDevice.lib Fri Mar 01 13:33:02 2013 +0000 +++ b/USBDevice.lib Sun Nov 22 09:44:43 2015 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/users/mbed_official/code/USBDevice/#335f2506f422 +http://mbed.org/users/mbed_official/code/USBDevice/#2af474687369
--- a/main.cpp Fri Mar 01 13:33:02 2013 +0000
+++ b/main.cpp Sun Nov 22 09:44:43 2015 +0000
@@ -1,14 +1,223 @@
#include "mbed.h"
#include "USBSerial.h"
-
+#define MAX_SIZE 16
+#include <ctype.h>
+
//Virtual serial port over USB
-USBSerial serial;
-
-int main(void) {
-
- while(1)
- {
- serial.printf("I am a virtual serial port\r\n");
- wait(1);
+USBSerial pc;
+DigitalOut WDO(P0_20);
+DigitalOut LED(P0_7);
+
+
+
+Serial device(P0_19, P0_18); // tx, rx of RS232 pins
+Timeout flipper;
+char buf[MAX_SIZE];
+char data[MAX_SIZE];
+unsigned int i,j;
+bool begin_msg=false;
+
+Ticker t1;
+
+// ******************************************************
+// Finite State Machine Declare variable
+// ******************************************************
+
+
+/* Various states */
+typedef enum tState {
+ STATE_A,
+ STATE_B,
+ STATE_C
+} tState;
+
+/* Variables */
+tState state; /* Current state */
+volatile unsigned char trigger; /* Bit set to indicate which button triggers */
+
+
+
+/* task to be executed during each state transition */
+void do_task(int n)
+{
+ pc.printf("Task: %d \r\n", n);
+ wait(0.5);
+ trigger = 0;
+ pc.printf("Task %d done ... trigger=%d\r\n\r\n", n, trigger);
+
+}
+
+void sleep(void)
+{
+ __WFI(); /* Power-saving sleeping mode */
+}
+
+// ***************************************************
+// End of Finite State Machine declare variable
+// ***************************************************
+
+
+void determine_event(){
+ if ( strstr(data, "OK") != NULL ){
+ trigger = 0x02;
+ }
+ else if ( strstr(data, "ERROR") != NULL){
+ trigger = 0x04;
+ }
+ else{
+ trigger = 0x08;
+ }
+
+}
+
+
+
+// process to run after timeout in receiving char from serial device ( device.getc() )
+void printout()
+{
+ //for ( j=0; j<MAX_SIZE; j++) { // Put the character received into the computer.
+ // pc.putc(buf[j]);
+ // data[j] = buf[j];
+ // buf[j] = 0;
+ //}
+
+ memcpy(data, buf, MAX_SIZE);
+ memset(buf, 0, MAX_SIZE*sizeof(unsigned char) );
+ i = 0; //reset index
+ pc.printf(" data=%s<--\r\n", data);
+
+ determine_event();
+}
+void time_out()
+{
+ printout();
+ //pc.printf("time out\n");
+ flipper.detach(); //reset timer
+}
+
+// char receive within window size (MAX_SIZE) or within window time (start_timer) otherwise discard
+void check_frame()
+{
+ //pc.printf(" i=%d \n",i);
+ if ( i == 0 ) { // if the 1st char receive
+ flipper.attach(&time_out, 3 ); //start_timer
+ pc.printf("data in UART start timer ... ");
+ }
+ if ( i >= MAX_SIZE ) { // char i receive exceed window size
+ printout();
+ } else { // char i still in window size
+ i++; // continue count
}
+
+}
+
+void rec() // Here's my serial interrupt routine.
+{
+ if ( device.readable() ) {
+ trigger = 0;
+ //pc.printf("device.readable() there is some input in i=%d\r\n",i);
+ buf[i] = device.getc();
+ check_frame();
+ } else {
+ pc.printf(" device.readable() is not ready \n");
+ }
+} // interrupt is done.
+
+void blink()
+{
+ LED = !LED;
+ WDO = !WDO;
+}
+
+
+int main(void)
+{
+
+ device.baud(115200);
+
+ wait(1);
+ device.attach(&rec);
+ wait(3);
+ pc.printf("start at PC usb \r\n");
+ device.printf("start at P0_19,P0_18 \r\n");
+ i = 0;
+ t1.attach(&blink, 3.0);
+
+ /* initial the state machine */
+ state = STATE_A;
+ do_task(STATE_A);
+
+ while(1) {
+ /*
+ if(device.readable()) {
+ pc.putc(device.getc());
+ }
+ */
+
+ if(pc.readable()) {
+ //trigger = 1;
+ device.putc(pc.getc());
+ }
+
+ /* While I am not triggered, sleep */
+ //while (!trigger) {
+ // sleep();
+ //}
+ /* I am awake now. Check which button has triggered*/
+ switch (state) {
+ //////////////////////////////////////////////////////////////////
+ case STATE_A: ///////////////////////////////////////////////////
+ //////////////////////////////////////////////////////////////////
+ if (trigger & 0x02) { /* Button 1 down */
+ pc.printf("STATE_A ");
+ do_task(1);
+
+ pc.printf("will enter STATE_B \r\n");
+ state = STATE_B; /* Transit to STATE_B */
+ }
+ // trigger has to be set before state
+ //trigger = 0; /* Ignore other triggers in this state */
+
+ break;
+
+ //////////////////////////////////////////////////////////////////
+ case STATE_B: ///////////////////////////////////////////////////
+ //////////////////////////////////////////////////////////////////
+ if (trigger & 0x04) { /* Button 1 down */
+ pc.printf("STATE_B ");
+ do_task(2);
+ state = STATE_C;
+ pc.printf("will enter STATE_C \r\n");
+ }
+
+ //if (trigger & 0x02) { /* Button 2 down */
+ // do_task(3);
+ /* Remain in the same state */
+ //}
+ //if (trigger & 0x04) { /* Button 3 down */
+ // do_task(4);
+ // state = STATE_C;
+ //}
+
+ // trigger have to be set before state
+ //trigger = 0; /* Ignore other triggers in this state */
+ //state = STATE_A;
+ break;
+
+ //////////////////////////////////////////////////////////////////
+ case STATE_C: ///////////////////////////////////////////////////
+ //////////////////////////////////////////////////////////////////
+ if (trigger & 0x08) { /* Button 3 down */
+ pc.printf("STATE_C ");
+ do_task(3);
+ state = STATE_A;
+ pc.printf("will enter STATE_A \r\n");
+ }
+ // trigger has to be set before state
+ //trigger = 0;
+ //state = STATE_A;
+ break;
+ } // switch
+
+ }//while(1)
}
\ No newline at end of file
--- a/mbed.bld Fri Mar 01 13:33:02 2013 +0000 +++ b/mbed.bld Sun Nov 22 09:44:43 2015 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/users/mbed_official/code/mbed/builds/3d0ef94e36ec \ No newline at end of file +http://mbed.org/users/mbed_official/code/mbed/builds/9296ab0bfc11 \ No newline at end of file