stuartl/cluster-powerctl
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powerctl: Create one-second timer

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This creates a one-second timing event from the high-frequency timer for
less frequent events so we don't have to keep ticking down larger
numbers.
This commit is contained in:
Stuart Longland 2017-03-18 15:44:48 +10:00
parent c29736ca86
commit 511309aa74
Signed by: stuartl
GPG Key ID: F954BBBB7948D546
1 changed files with 27 additions and 17 deletions
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44
powerctl.c
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@ -44,11 +44,7 @@
#define V_CL_ADC ADC_READ(V_CL_MV)
/* --- Timeouts --- */
#define T_HF_TICKS TIMER_TICKS(T_HF_MS)
#define T_LF_TICKS TIMER_TICKS(T_LF_MS)
#define T_FAN_TICKS TIMER_TICKS(T_FAN_MS)
#define T_LED_TICKS TIMER_TICKS(T_LED_MS)
#define T_ADC_TICKS TIMER_TICKS(T_ADC_MS)
#define STATE_DIS_CHECK (0) /*!< Check voltage in discharge state */
#define STATE_DIS_WAIT (1) /*!< Wait in discharge state */
@ -94,10 +90,15 @@ static volatile uint16_t v_bn_adc = 0;
*/
static volatile uint16_t temp_adc = 0;
/*!
* One-second event timer
*/
static volatile uint16_t t_second = 0;
/*!
* How long before we next take a reading?
*/
static volatile uint16_t t_adc = 0;
static volatile uint8_t t_adc = 0;
/*!
* How long before we change LED states?
@ -105,12 +106,12 @@ static volatile uint16_t t_adc = 0;
static volatile uint16_t t_led = 0;
/*! Fan kick-start timeout */
static volatile uint32_t t_fan = 0;
static volatile uint8_t t_fan = 0;
/*!
* Charger timeout
*/
static volatile uint32_t t_charger = T_LF_TICKS;
static volatile uint8_t t_charger = T_LF_S;
/* Debug messages */
#ifdef DEBUG
@ -202,9 +203,9 @@ static void discharge_check() {
uart_tx_bool(STR_V_BN_GE_V_H, v_bn_adc >= V_H_ADC);
#endif
if (v_bn_adc >= V_H_ADC)
t_charger = T_LF_TICKS;
t_charger = T_LF_S;
else
t_charger = T_HF_TICKS;
t_charger = T_HF_S;
/* Snapshot the current battery voltage */
v_bl_adc = v_bn_adc;
@ -243,9 +244,9 @@ static void charge_check() {
#endif
/* Still need to charge, when should we next check? */
if (v_bn_adc <= V_CL_ADC)
t_charger = T_HF_TICKS;
t_charger = T_HF_S;
else
t_charger = T_LF_TICKS;
t_charger = T_LF_S;
#ifdef DEBUG
uart_tx_bool(STR_HAVE_SOURCE, charge_source != SRC_NONE);
@ -339,6 +340,15 @@ int main(void) {
#endif
MCUSR = 0;
while(1) {
/* One second passed, tick down the 1-second timers. */
if (!t_second) {
t_second = TIMER_FREQ;
if (t_adc)
t_adc--;
if (t_charger)
t_charger--;
}
if (!t_led) {
if (v_bn_adc <= V_CL_ADC) {
/* Battery is critically low */
@ -375,7 +385,7 @@ int main(void) {
}
if (!t_adc) {
t_adc = T_ADC_TICKS;
t_adc = T_ADC_S;
ADCSRA |= (1 << ADEN) | (1 << ADSC);
while(ADCSRA & (1 << ADEN));
@ -394,7 +404,7 @@ int main(void) {
/ (TEMP_MAX - TEMP_MIN));
if (OCR0A < FAN_PWM_MIN)
/* Enter kick-start mode */
t_fan = T_FAN_TICKS;
t_fan = T_FAN_S;
else if (pwm > FAN_PWM_MIN)
OCR0A = pwm;
else
@ -430,12 +440,12 @@ ISR(TIM1_COMPA_vect) {
#ifdef DEBUG
uart_tick();
#endif
if (t_adc)
t_adc--;
/* One-second timer for longer events */
if (t_second)
t_second--;
if (t_led)
t_led--;
if (t_charger)
t_charger--;
}
ISR(ADC_vect) {