atarted new rf433rcv as copy of pjrc rawhid

[svn42.git] / rf433rcv / teensy / example.c

diff --git a/rf433rcv/teensy/example.c b/rf433rcv/teensy/example.c
new file mode 100644 (file)
index 0000000..635b16f
--- /dev/null
+++ b/rf433rcv/teensy/example.c
@@ -0,0 +1,109 @@
+/* Teensy RawHID example
+ * http://www.pjrc.com/teensy/rawhid.html
+ * Copyright (c) 2009 PJRC.COM, LLC
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above description, website URL and copyright notice and this permission
+ * notice shall be included in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <avr/io.h>
+#include <avr/pgmspace.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include "usb_rawhid.h"
+#include "analog.h"
+
+#define CPU_PRESCALE(n)        (CLKPR = 0x80, CLKPR = (n))
+
+volatile uint8_t do_output=0;
+uint8_t buffer[64];
+
+int main(void)
+{
+       int8_t r;
+       uint8_t i;
+       uint16_t val, count=0;
+
+       // set for 16 MHz clock
+       CPU_PRESCALE(0);
+
+       // Initialize the USB, and then wait for the host to set configuration.
+       // If the Teensy is powered without a PC connected to the USB port,
+       // this will wait forever.
+       usb_init();
+       while (!usb_configured()) /* wait */ ;
+
+       // Wait an extra second for the PC's operating system to load drivers
+       // and do whatever it does to actually be ready for input
+       _delay_ms(1000);
+
+        // Configure timer 0 to generate a timer overflow interrupt every
+        // 256*1024 clock cycles, or approx 61 Hz when using 16 MHz clock
+        TCCR0A = 0x00;
+        TCCR0B = 0x05;
+        TIMSK0 = (1<<TOIE0);
+
+       while (1) {
+               // if received data, do something with it
+               r = usb_rawhid_recv(buffer, 0);
+               if (r > 0) {
+                       // output 4 bits to D0, D1, D2, D3 pins
+                       DDRD = 0x0F;
+                       PORTD = (PORTD & 0xF0) | (buffer[0] & 0x0F);
+                       // ignore the other 63.5 bytes....
+               }
+               // if time to send output, transmit something interesting
+               if (do_output) {
+                       do_output = 0;
+                       // send a packet, first 2 bytes 0xABCD
+                       buffer[0] = 0xAB;
+                       buffer[1] = 0xCD;
+                       // put A/D measurements into next 24 bytes
+                       for (i=0; i<12; i++) {
+                               val = analogRead(i);
+                               buffer[i * 2 + 2] = val >> 8;
+                               buffer[i * 2 + 3] = val & 255;
+                       }
+                       // most of the packet filled with zero
+                       for (i=26; i<62; i++) {
+                               buffer[i] = 0;
+                       }
+                       // put a count in the last 2 bytes
+                       buffer[62] = count >> 8;
+                       buffer[63] = count & 255;
+                       // send the packet
+                       usb_rawhid_send(buffer, 50);
+                       count++;
+               }
+       }
+}
+
+// This interrupt routine is run approx 61 times per second.
+ISR(TIMER0_OVF_vect)
+{
+       static uint8_t count=0;
+
+       // set the do_output variable every 2 seconds
+       if (++count > 122) {
+               count = 0;
+               do_output = 1;
+       }
+}
+
+
+