commit cdc080c9d9dcb720fa578a11642f1b917bb0ff45
parent 5f152b9f37adee99314ace9e46020234ad3b4a51
Author: William Lindholm <william_lindholm@outlook.com>
Date: Tue, 19 Nov 2024 20:23:35 +0000
Implemented continous timer reporting through usart
Diffstat:
2 files changed, 103 insertions(+), 10 deletions(-)
diff --git a/Project2/.vs/Project2/v14/.atsuo b/Project2/.vs/Project2/v14/.atsuo
Binary files differ.
diff --git a/Project2/Project2/main.c b/Project2/Project2/main.c
@@ -20,6 +20,9 @@
#include <stdbool.h>
+/// TODO
+// ENABLE EVENT CONTROLLED START CONVERSION FOR ADC
+
/************************************************************************/
/* Globals */
/************************************************************************/
@@ -40,10 +43,15 @@ struct LED_BITS LED_Array[10] = {
uint16_t qcntr = 0, sndcntr = 0; /*indexes into the queue*/
unsigned char queue[QUEUE_SIZE]; /*character queue*/
-/* Led related globals */
+/* ADC related globals */
bool ADC_READING_READY;
uint16_t ADC_VALUE;
+/* 555 Timer related globals */
+bool TIMER_READING_READY;
+uint16_t TCB0_HIGH_PULSE;
+uint16_t TCB0_LOW_PULSE;
+uint16_t TCB0_PERIOD;
/************************************************************************/
@@ -53,12 +61,18 @@ void CLOCK_init (void);
static void configure_USART3(void);
void sendmsg (char *s);
void configure_ADC0(void);
+void configure_EVSYS();
+void configure_TCB0(void);
+void print_tcb0_high_pulse(void);
+void print_tcb0_low_pulse(void);
void print_adc_voltage(void);
void print_adc_value(void);
void print_available_commands(void);
+void print_tcb0_timer_period(void);
bool queue_is_empty(void);
+
int main(void)
{
char ch;
@@ -67,10 +81,10 @@ int main(void)
// Flags
bool continuous_adc_reporting = false;
bool continuous_timer_reporting = false;
- bool continuous_lowpulse_reporting = false;
- bool continuous_highpulse_reporting = false;
CLOCK_init();
+ configure_EVSYS();
+ configure_TCB0();
configure_USART3();
configure_ADC0();
@@ -83,10 +97,30 @@ int main(void)
ch = USART3.RXDATAL;
switch (ch)
{
+ case 'H':
+ case 'h':
+ print_tcb0_high_pulse();
+ break;
+ case 'L':
+ case 'l':
+ print_tcb0_low_pulse();
+ break;
+ case 'T':
+ case 't':
+ print_tcb0_timer_period();
+ break;
case 'A':
case 'a':
print_adc_value();
break;
+ case 'C':
+ case 'c':
+ continuous_timer_reporting = true;
+ break;
+ case 'E':
+ case 'e':
+ continuous_timer_reporting = false;
+ break;
case 'V':
case 'v':
print_adc_voltage();
@@ -108,13 +142,15 @@ int main(void)
}
// Continuous reporting
- if (continuous_adc_reporting)
+ if (continuous_adc_reporting && ADC_READING_READY && queue_is_empty())
{
- if (ADC_READING_READY && queue_is_empty())
- {
- print_adc_voltage();
- ADC_READING_READY = false;
- }
+ print_adc_voltage();
+ ADC_READING_READY = false;
+ }
+ if (continuous_timer_reporting && TIMER_READING_READY && queue_is_empty())
+ {
+ print_tcb0_timer_period();
+ TIMER_READING_READY = false;
}
}
}
@@ -126,6 +162,12 @@ void CLOCK_init (void)
/* If set from the fuses during programming, the CPU will now run at 20MHz (default is /6) */
}
+void configure_EVSYS()
+{
+ EVSYS.CHANNEL4 = EVSYS_GENERATOR_PORT0_PIN3_gc; // Select PE3 as event generator
+ EVSYS.USERTCB0 = EVSYS_CHANNEL_CHANNEL4_gc; // Select TCB0 as channel4 user
+}
+
static void configure_USART3(void)
{
// Assign the USART3 transmit complete interrupt high priority (1)
@@ -149,11 +191,22 @@ void configure_ADC0()
ADC0.CTRLC = ADC_SAMPCAP_bm | ADC_REFSEL_VDDREF_gc | ADC_PRESC_DIV64_gc; // Enable SAMPCAP, Set reference voltage to VDD, Set ADC prescaler to div 128
ADC0.MUXPOS = ADC_MUXPOS_AIN3_gc; // Set input to Analog in 3
ADC0.INTCTRL = ADC_RESRDY_bm; // Enable interrupt on result ready
- ADC0.CTRLD = ADC_INITDLY_DLY16_gc; // Initial delay of 16 cycles
+ ADC0.CTRLD = ADC_INITDLY_DLY0_gc; // Initial delay of 0 cycles
ADC0.CTRLA |= ADC_ENABLE_bm; // Enable ADC
ADC0.COMMAND = ADC_STCONV_bm; // Start first measurement
}
+/************************************************************************/
+/* Enable and configure TCB0 for PW measurement */
+/************************************************************************/
+void configure_TCB0()
+{
+ TCB0.CTRLA = TCB_CLKSEL_CLKDIV2_gc | TCB_ENABLE_bm; // Select CLK_PER/2 source and enable
+ TCB0.CTRLB = TCB_CNTMODE_FRQPW_gc; // Set mode to PW measurment mode
+ TCB0.INTCTRL = TCB_CAPT_bm; // Capture Interrupt Enable
+ TCB0.EVCTRL = (1<<TCB_EDGE_bp) | (1<<TCB_CAPTEI_bp); // Event on falling edge & enable capture event input
+}
+
/*this function loads the queue and */
/*starts the sending process*/
void sendmsg (char *s)
@@ -221,6 +274,30 @@ void print_adc_value()
sendmsg(str_buffer);
}
+/************************************************************************/
+/* Printing of 555 timer information */
+/************************************************************************/
+void print_tcb0_high_pulse()
+{
+ char str_buffer[16];
+ sprintf(str_buffer, "Low = %dmS\n", TCB0_LOW_PULSE);
+ sendmsg(str_buffer);
+}
+
+void print_tcb0_low_pulse()
+{
+ char str_buffer[16];
+ sprintf(str_buffer, "High = %dmS\n", TCB0_HIGH_PULSE);
+ sendmsg(str_buffer);
+}
+
+void print_tcb0_timer_period()
+{
+ char str_buffer[16];
+ sprintf(str_buffer, "Timer = %dmS\n", TCB0_PERIOD);
+ sendmsg(str_buffer);
+}
+
// Print the available commands
void print_available_commands()
{
@@ -270,4 +347,20 @@ ISR(ADC0_RESRDY_vect)
ADC_READING_READY = true; // Set flag informing that new voltage value is ready
ADC_VALUE = ADC0.RES; // Store the reading of the ADC result in a global variable
ADC0.INTFLAGS = ADC_RESRDY_bm; // Clear interrupt flag
+}
+
+
+ISR(TCB0_INT_vect)
+{
+ TCB0.INTFLAGS = 1; // Reset interrupt flag
+ uint16_t ccmp = TCB0.CCMP;
+ uint16_t cnt = TCB0.CNT;
+
+ // 1 / 1MHz = 0.1uS per tick
+ TCB0_PERIOD = 0.1 * cnt; // calculate timer period in uS
+
+ TCB0_LOW_PULSE = 0.1 * ccmp;
+ TCB0_HIGH_PULSE = 0.1 * (cnt - ccmp);
+
+ TIMER_READING_READY = true;
}
\ No newline at end of file
