Diff: PulseTrain.cpp

Revision:

1:19c3a52c80c3

Child:

4:7d5afb2e3b79

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PulseTrain.cpp	Mon Jan 06 20:26:53 2020 +0000
@@ -0,0 +1,109 @@
+#include "PulseTrain.h"
+
+PulseTrain::PulseTrain(
+    uint32_t const arg_freq,
+    float const arg_duty,
+    uint32_t const arg_freq_max
+):
+    FREQ_MAX(arg_freq_max),
+    m_freq(velidateRange<uint32_t>(arg_freq, 1, FREQ_MAX)),
+    m_duty(velidateRange<float>(arg_duty, 0.0, 1.0))
+{
+    m_period_us = 1000000 / m_freq + (1000000 % m_freq > m_freq /2 ? 1 : 0);
+    init();
+    m_callback_asClock = doNothing;
+    m_callback_asPulseEdge = doNothing;
+
+}
+
+void PulseTrain::attachCallback_asClock(Callback<void(bool)> arg_callback)
+{
+    m_callback_asClock = arg_callback;
+}
+
+void PulseTrain::attachCallback_asPulseEdge(Callback<void(bool)> arg_callback)
+{
+    m_callback_asPulseEdge = arg_callback;
+}
+
+void PulseTrain::setFrequency(uint32_t const arg_freq)
+{
+    m_freq = velidateRange<uint32_t>(arg_freq, 1, FREQ_MAX);
+    m_period_us = 1000000 / m_freq + (1000000 % m_freq > m_freq /2 ? 1 : 0);
+    init();
+}
+
+void PulseTrain::setDutycycle(float const arg_duty)
+{
+    m_duty = velidateRange<float>(arg_duty, 0.0, 1.0);
+    init();
+}
+
+template <typename T>
+T PulseTrain::velidateRange(T const arg_val, T const arg_min, T const arg_max)
+{
+    if(arg_val < arg_min) return arg_min;
+    else if (arg_val <=  arg_max) return arg_val;
+    else return arg_max;
+}
+
+void PulseTrain::init()
+{
+    int a, b, r;
+    a = m_period_us;
+    b = a * m_duty;
+    r = a % b;
+    while ( r != 0 ) {
+        a = b;
+        b = r;
+        r = a % b;
+    }
+    m_clock_period_us = b;
+    
+     m_period_pcp = m_period_us / m_clock_period_us;
+     m_falling = m_period_pcp * m_duty;
+}
+
+void PulseTrain::incrementClock()
+{
+    static unsigned int l_itr = 0;
+
+    if (l_itr == m_raising) {
+        m_pulsestate = true;
+        m_callback_asPulseEdge(m_pulsestate);
+    } else if (l_itr == m_falling) {
+        m_pulsestate = false;
+        m_callback_asPulseEdge(m_pulsestate);
+    }
+
+    l_itr = (l_itr + 1) % m_period_pcp;
+
+    m_callback_asClock(m_pulsestate);
+}
+
+
+bool PulseTrain::getState()
+{
+    return m_pulsestate;
+}
+
+uint32_t PulseTrain::getFrequency()
+{
+    return m_freq;
+}
+
+float PulseTrain::getDutycycle()
+{
+    return m_duty;
+}
+
+uint32_t
+PulseTrain::getPeriod_us()
+{
+    return m_period_us;
+}
+
+uint32_t PulseTrain::getClockperiod_us()
+{
+    return m_clock_period_us;
+}
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