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uc: Safeguard against potential race condition. Thx Wutje!

This commit is contained in:
Bart Van Der Meerssche 2009-11-14 23:51:43 +00:00
parent 155ec157d0
commit b69e04c4ac
2 changed files with 8 additions and 3 deletions
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10
uc/main.c
View File

@ -36,7 +36,7 @@
#include <avr/wdt.h>
// variable declarations
volatile struct state aux[4] = {{false, false, START}, {false, false, START}, {false, false, START}, {false, false, START}};
volatile struct state aux[4] = {{false, false, START, 0}, {false, false, START, 0}, {false, false, START, 0}, {false, false, START, 0}};
volatile struct sensor EEMEM EEPROM_measurements[4] = {{SENSOR0, START}, {SENSOR1, START}, {SENSOR2, START}, {SENSOR3, START}};
volatile struct sensor measurements[4];
@ -75,6 +75,7 @@ ISR(TIMER2_OVF_vect) {
measurements[0].value++;
aux[0].pulse = true;
aux[0].nano -= 1000000000;
aux[0].debug = ADC;
}
// start a new ADC conversion
ADCSRA |= (1<<ADSC);
@ -210,9 +211,12 @@ void setup()
void send(const struct sensor *measurement)
{
uint8_t i = 46;
uint32_t value = measurement->value;
char pulse[49];
cli();
uint32_t value = measurement->value;
sei();
// generate pulse message structure
strcpy(pulse, "pls ");
strcpy(&pulse[4], measurement->id);
@ -240,7 +244,7 @@ void loop()
if (i == 0) {
//debugging
printString("msg ADC0 sample value: ");
printIntegerInBase((unsigned long)ADC, 10);
printIntegerInBase((unsigned long)aux[0].debug, 10);
printString("\n");
}
send((const struct sensor *)&measurements[i]);

1
uc/main.h
View File

@ -54,6 +54,7 @@ struct state {
boolean pulse;
boolean toggle;
uint32_t nano;
uint16_t debug;
};
struct sensor {