From 4065d4f5d506d7a0e562e98b06d2afd01e529df6 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <daniel.friesel@uos.de>
Date: Fri, 10 Jul 2020 14:53:45 +0200
Subject: add resistive load driver for energy measurement device evaluation

---
 src/driver/resistive_load.cc | 120 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 src/driver/resistive_load.cc

(limited to 'src')

diff --git a/src/driver/resistive_load.cc b/src/driver/resistive_load.cc
new file mode 100644
index 0000000..419c6c0
--- /dev/null
+++ b/src/driver/resistive_load.cc
@@ -0,0 +1,120 @@
+#include "driver/resistive_load.h"
+#include "driver/gpio.h"
+#include "arch.h"
+
+#ifndef RESISTIVE_LOAD_PIN1
+#error RESISTIVE_LOAD_PIN1 must be set
+#endif
+
+#ifndef RESISTIVE_LOAD_PIN2
+#error RESISTIVE_LOAD_PIN2 must be set
+#endif
+
+#ifndef RESISTIVE_LOAD_PIN3
+#error RESISTIVE_LOAD_PIN3 must be set
+#endif
+
+#ifndef RESISTIVE_LOAD_PIN4
+#error RESISTIVE_LOAD_PIN4 must be set
+#endif
+
+void ResistiveLoad::setup()
+{
+	gpio.output(RESISTIVE_LOAD_PIN1, 0);
+	gpio.output(RESISTIVE_LOAD_PIN2, 0);
+	gpio.output(RESISTIVE_LOAD_PIN3, 0);
+	gpio.output(RESISTIVE_LOAD_PIN4, 0);
+}
+
+void ResistiveLoad::switchToNone()
+{
+	gpio.write(RESISTIVE_LOAD_PIN1, 0);
+	gpio.write(RESISTIVE_LOAD_PIN2, 0);
+	gpio.write(RESISTIVE_LOAD_PIN3, 0);
+	gpio.write(RESISTIVE_LOAD_PIN4, 0);
+}
+
+void ResistiveLoad::switchTo750()
+{
+	gpio.write(RESISTIVE_LOAD_PIN1, 1);
+	gpio.write(RESISTIVE_LOAD_PIN2, 1);
+	gpio.write(RESISTIVE_LOAD_PIN3, 0);
+	gpio.write(RESISTIVE_LOAD_PIN4, 0);
+}
+
+void ResistiveLoad::switchTo1K0()
+{
+	gpio.write(RESISTIVE_LOAD_PIN1, 1);
+	gpio.write(RESISTIVE_LOAD_PIN2, 0);
+	gpio.write(RESISTIVE_LOAD_PIN3, 0);
+	gpio.write(RESISTIVE_LOAD_PIN4, 0);
+}
+
+void ResistiveLoad::switchTo2K4()
+{
+	gpio.write(RESISTIVE_LOAD_PIN1, 0);
+	gpio.write(RESISTIVE_LOAD_PIN2, 1);
+	gpio.write(RESISTIVE_LOAD_PIN3, 0);
+	gpio.write(RESISTIVE_LOAD_PIN4, 1);
+}
+
+void ResistiveLoad::switchTo3K3()
+{
+	gpio.write(RESISTIVE_LOAD_PIN1, 0);
+	gpio.write(RESISTIVE_LOAD_PIN2, 1);
+	gpio.write(RESISTIVE_LOAD_PIN3, 0);
+	gpio.write(RESISTIVE_LOAD_PIN4, 0);
+}
+
+void ResistiveLoad::switchTo10K()
+{
+	gpio.write(RESISTIVE_LOAD_PIN1, 0);
+	gpio.write(RESISTIVE_LOAD_PIN2, 0);
+	gpio.write(RESISTIVE_LOAD_PIN3, 0);
+	gpio.write(RESISTIVE_LOAD_PIN4, 1);
+}
+
+void ResistiveLoad::switchTo47K()
+{
+	gpio.write(RESISTIVE_LOAD_PIN1, 0);
+	gpio.write(RESISTIVE_LOAD_PIN2, 0);
+	gpio.write(RESISTIVE_LOAD_PIN3, 1);
+	gpio.write(RESISTIVE_LOAD_PIN4, 0);
+}
+
+void ResistiveLoad::nop1K0(unsigned int duration_ms)
+{
+	switchTo1K0();
+	arch.delay_ms(duration_ms);
+	switchToNone();
+}
+
+void ResistiveLoad::nop2K4(unsigned int duration_ms)
+{
+	switchTo2K4();
+	arch.delay_ms(duration_ms);
+	switchToNone();
+}
+
+void ResistiveLoad::nop3K3(unsigned int duration_ms)
+{
+	switchTo3K3();
+	arch.delay_ms(duration_ms);
+	switchToNone();
+}
+
+void ResistiveLoad::nop10K(unsigned int duration_ms)
+{
+	switchTo10K();
+	arch.delay_ms(duration_ms);
+	switchToNone();
+}
+
+void ResistiveLoad::nop47K(unsigned int duration_ms)
+{
+	switchTo47K();
+	arch.delay_ms(duration_ms);
+	switchToNone();
+}
+
+ResistiveLoad resistiveLoad;
-- 
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