Merge pull request #12 from COVID-19-electronic-health-system/devel

Enables Bluetooth functionality

board/Makefile

@@ -3,7 +3,7 @@ PROGRAMMER=atmelice_isp
 F_CPU=1000000 
 CC=avr-gcc
 OBJCOPY=avr-objcopy
-CFLAGS=-Wall -g -Os -mmcu=${MCU} -DF_CPU=${F_CPU}
+CFLAGS=-Wall -g -Os -mmcu=${MCU} -DF_CPU=${F_CPU} -Wl,-u,vfprintf
 TARGET=main
 SRC=main.c 
 ADC_LIB=adc/adc.c
@@ -12,7 +12,7 @@ MPX_LIB=mpx5100/mpx5100.c
 LED_LIB=led/led.c
 
 all:
-	${CC} ${CFLAGS} ${SRC} ${ADC_LIB} ${USART_LIB} ${MPX_LIB} ${LED_LIB} -o firmware/${TARGET}.bin -std=c99
+	${CC} ${CFLAGS} ${SRC} ${ADC_LIB} ${USART_LIB} ${MPX_LIB} ${LED_LIB} -o firmware/${TARGET}.bin -std=c99  
 	${OBJCOPY} -j .text -j .data -O ihex firmware/${TARGET}.bin firmware/${TARGET}.hex
 
 flash:

board/driver/led.h

@@ -1,6 +1,6 @@
 #include <avr/io.h>
 #include <util/delay.h>
-#define STATUS_LED PA1
+#define STATUS_LED PB0
 
 void ledInit(void);
 void idle_blink(unsigned int period);

board/driver/usart.h

@@ -1,8 +1,11 @@
+#include <stdio.h>
+#include <stdlib.h>
 #include <avr/io.h>
-#define CLKS 1000000
+#define FOCS 2000000
 #define BAUD 9600
-#define MYUBRR ((CLKS/16*BAUD) - 1)
-
+#define MYUBRR FOCS/16/BAUD-1
 void usartInit(unsigned int ubrr);
 void usartTransmit(unsigned char data);
 unsigned char usartReceive(void);
+int print(char c, FILE *stream);
+

board/main.c

@@ -1,9 +1,14 @@
+#include "driver/usart.h"
 #include "driver/led.h" 
 
+static FILE mystdout = FDEV_SETUP_STREAM(print, NULL, _FDEV_SETUP_RW);
+
 int main(void) {
-    ledInit(); 
-    while(1) {
-        idle_blink(500); // Blinks PanFLUte's on-board LED 
+    usartInit(MYUBRR);
+    stdout = &mystdout;
+    while(1) {	
+    	printf("%d\n", 21 + 79);
+	delay_ms(1000);
     }
     return 0;
 }

board/usart/usart.c

@@ -8,6 +8,7 @@ void usartInit(unsigned int ubrr) {
     UCSR0B = ((1 << RXEN0) | (1 << TXEN0));
     /* Set frame format: 8data, 1 stop bit */
     UCSR0C = ((1 << UCSZ00) | (1 << UCSZ01));
+    UCSR0A = (1 << U2X0); // Double the USART Transmission Speed 
 }
 
 
@@ -25,3 +26,10 @@ unsigned char usartReceive(void) {
     /* Get and return received data from buffer */
     return UDR0;
 }
+
+int print(char c, FILE *stream) {
+    while((UCSR0A & (1 << UDRE0)) == 0);
+    UDR0 = c;
+    return 0;
+}
+