Andres Vahter
This is mbed part of the OOThermometer project: https://github.com/andresv/OOThermometer It displays incoming temperatures on LCD screen.
Revision 0:c166f2690f21, committed 2012-01-11
- Comitter:
- grandmastera
- Date:
- Wed Jan 11 19:49:29 2012 +0000
- Commit message:
- Go to public!
Changed in this revision
diff -r 000000000000 -r c166f2690f21 TextLCD.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TextLCD.lib Wed Jan 11 19:49:29 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/simon/code/TextLCD/#44f34c09bd37
diff -r 000000000000 -r c166f2690f21 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Jan 11 19:49:29 2012 +0000
@@ -0,0 +1,163 @@
+#include "mbed.h"
+#include "TextLCD.h"
+
+# define TEMPERATURE_TIMEOUT 10*60+5 //s
+
+// https://github.com/andresv/OOThermometer
+// mbed shows data from serial on LCD screen
+
+TextLCD lcd(p26, p25, p24, p23, p22, p21, TextLCD::LCD16x2B); // rs, e, d4-d7
+DigitalOut led1(LED1);
+
+Serial pc(USBTX, USBRX);
+Serial base(p9, p10);
+Timeout syncronizator;
+Timeout timeouter;
+
+Timer in_timer;
+Timer out_timer;
+
+enum {
+ SERIAL_ADDR_NODE = 0x01,
+ SERIAL_ADDR_BASE = 0x00,
+
+ MSG_THERMOMETER = 0x01,
+ MSG_REQ_THERMOMETER = 0x10
+};
+
+typedef struct {
+ unsigned short battery;
+ int light;
+ int temp;
+ char addr;
+ char header;
+} __attribute__((packed)) thermometer_msg_t;
+
+typedef struct {
+ char header;
+} __attribute__((packed)) req_thermometer_msg_t;
+
+char rx_buffer[50];
+char* inserter = rx_buffer + sizeof(rx_buffer);
+unsigned int bytes_received = 0;
+
+float in_temp = 0.0;
+float out_temp = 0.0;
+
+void packet_received();
+void check_timeout();
+void update_out_temp();
+void update_in_temp();
+void request_temp();
+
+//----------------------------------------------------------------------------
+// Byte received from UART
+//----------------------------------------------------------------------------
+void receive() {
+ led1 = !led1;
+ if (base.readable()) {
+ // if we have not got any data for 50 ms display data
+ // because it was probably packet end
+ // here it is like watchdog kick:
+ syncronizator.attach(&packet_received, 0.05);
+
+ *inserter = base.getc();
+ inserter--;
+ bytes_received++;
+
+ if (inserter == rx_buffer)
+ inserter = rx_buffer + sizeof(rx_buffer);
+ }
+}
+
+//----------------------------------------------------------------------------
+// Probabaly packet received from UART
+//----------------------------------------------------------------------------
+void packet_received() {
+ thermometer_msg_t* msg = (thermometer_msg_t*)(inserter+1);
+ unsigned int i = 0;
+
+ for (i=0; i<bytes_received; i++)
+ pc.printf("%02X\n", ((char*)msg)[i]);
+ pc.printf("\n");
+
+ if (msg->header == MSG_THERMOMETER && bytes_received == sizeof(thermometer_msg_t)) {
+ if (msg->addr == SERIAL_ADDR_BASE) {
+ in_temp = ((float)msg->temp)/10;
+ in_timer.reset();
+ update_in_temp();
+ }
+ else if (msg->addr == SERIAL_ADDR_NODE) {
+ out_temp = ((float)msg->temp)/10;
+ out_timer.reset();
+ update_out_temp();
+ }
+ }
+
+ bytes_received = 0;
+ inserter = rx_buffer + sizeof(rx_buffer);
+}
+
+//----------------------------------------------------------------------------
+// Check whether there is timeout condition
+//----------------------------------------------------------------------------
+void check_timeout() {
+ pc.printf("timeout!\n");
+ timeouter.attach(&check_timeout, TEMPERATURE_TIMEOUT+1);
+ update_in_temp();
+ update_out_temp();
+}
+
+void update_in_temp() {
+ lcd.locate(2, 1);
+ pc.printf("in timer %.1f\n", in_timer.read());
+ if (in_timer.read() < TEMPERATURE_TIMEOUT) {
+ lcd.printf("%.1f\n", in_temp);
+ }
+ else {
+ lcd.printf("XX.X\n");
+ }
+}
+
+void update_out_temp() {
+ lcd.locate(10, 1);
+ pc.printf("out timer %.1f\n", out_timer.read());
+ if (out_timer.read() < TEMPERATURE_TIMEOUT) {
+ lcd.printf("%.1f\n", out_temp);
+ }
+ else {
+ lcd.printf("XX.X\n");
+ }
+}
+
+//----------------------------------------------------------------------------
+// Request temperature from base and node
+//----------------------------------------------------------------------------
+void request_temp() {
+ req_thermometer_msg_t msg;
+ unsigned int i;
+
+ msg.header = MSG_REQ_THERMOMETER;
+
+ for (i=0; i<sizeof(req_thermometer_msg_t); i++)
+ base.putc(((char*)&msg)[i]);
+}
+
+//----------------------------------------------------------------------------
+// Main
+//----------------------------------------------------------------------------
+int main() {
+ base.baud(115200);
+ pc.baud(115200);
+
+ base.attach(&receive, Serial::RxIrq);
+ lcd.printf(" IN OUT\n");
+
+ in_timer.start();
+ out_timer.start();
+ timeouter.attach(&check_timeout, TEMPERATURE_TIMEOUT+1);
+
+ request_temp();
+ while(1) {
+ }
+}
diff -r 000000000000 -r c166f2690f21 mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed Jan 11 19:49:29 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/3b05dd009342