experiment: Encapsulated timer period and source setting calculation into set_timer_period().

DSTAT-temp/src/experiment.c

@@ -75,6 +75,45 @@ void send_data_int32(int32_t data){
 	udi_cdc_putc(((unsigned char *)(&data))[3]);
 }
 
+void set_timer_period(uint32_t period, volatile void *tc)
+{
+	uint16_t temp_div = ceil((double)period/65536);
+	
+	if (temp_div == 1)
+	tc_write_clock_source(tc, TC_CLKSEL_DIV1_gc);
+	else if (temp_div == 2){
+		tc_write_clock_source(tc, TC_CLKSEL_DIV2_gc);
+		period /= 2;
+	}
+	else if (temp_div <= 4){
+		tc_write_clock_source(tc, TC_CLKSEL_DIV4_gc);
+		period /= 4;
+	}
+	else if (temp_div <= 8){
+		tc_write_clock_source(tc,TC_CLKSEL_DIV8_gc);
+		period /= 8;
+	}
+	else if (temp_div <= 64){
+		tc_write_clock_source(tc,TC_CLKSEL_DIV64_gc);
+		period /= 64;
+	}
+	else if (temp_div <= 256){
+		tc_write_clock_source(tc,TC_CLKSEL_DIV256_gc);
+		period /= 256;
+	}
+	else if (temp_div <= 1024){
+		tc_write_clock_source(tc,TC_CLKSEL_DIV1024_gc);
+		period /= 1024;
+	}
+	else{
+		printf("#Frequency/ADC rate is too low\n\r");
+		return;
+	}
+	
+	tc_write_period(tc, (uint16_t)period);
+	return;
+}
+
 void pot_init(void){
 	/**
 	 * Initializes AVR port directions and levels
@@ -767,45 +806,12 @@ void swv_experiment(int16_t start, int16_t stop, uint16_t step, uint16_t pulse_h
 	
 	//calculate time to ADC trigger
 	period = ceil((1/(double)frequency)*F_CPU);
-	uint16_t temp_div = ceil((double)period/65536);
-	
-	if (temp_div == 1)
-		tc_write_clock_source(&TCF0,TC_CLKSEL_DIV1_gc);
-	else if (temp_div == 2){
-		tc_write_clock_source(&TCF0,TC_CLKSEL_DIV2_gc);
-		period /= 2;
-	}
-	else if (temp_div <= 4){
-		tc_write_clock_source(&TCF0,TC_CLKSEL_DIV4_gc);
-		period /= 4;
-	}
-	else if (temp_div <= 8){
-		tc_write_clock_source(&TCF0,TC_CLKSEL_DIV8_gc);
-		period /= 8;
-	}
-	else if (temp_div <= 64){
-		tc_write_clock_source(&TCF0,TC_CLKSEL_DIV64_gc);
-		period /= 64;
-	}
-	else if (temp_div <= 256){
-		tc_write_clock_source(&TCF0,TC_CLKSEL_DIV256_gc);
-		period /= 256;
-	}
-	else if (temp_div <= 1024){
-		tc_write_clock_source(&TCF0,TC_CLKSEL_DIV1024_gc);
-		period /= 1024;
-	}
-	else{
-		printf("#Frequency/ADC rate is too low\n\r");
-		return;
-	}
-	
-	tc_write_period(&TCF0, (uint16_t)period);
 	
 	if (direction == 1)
 		max5443_set_voltage1(dacindex+dacindex_pulse_height);
 	else
 		max5443_set_voltage1(dacindex-dacindex_pulse_height);
+	set_timer_period(period, &TCF0);
 	
 	ads1255_wakeup();
 	ads1255_rdatac();

DSTAT-temp/src/experiment.h

@@ -77,6 +77,7 @@ extern uint8_t autogain_enable;
 
 void send_data_uint16(uint16_t data);
 void send_data_int32(int32_t data);
+void set_timer_period(uint32_t period, volatile void *tc);
 void pot_init(void);
 void pot_set_gain(void);
 void volt_exp_start(void);