From d154d22eb374a1e18d8628f62851459eff57804c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Hru=C5=A1ka?= <ondra@ondrovo.com>
Date: Fri, 28 Aug 2015 14:18:07 +0200
Subject: [PATCH] added missing includes & added SIPO PWM module

---
 lib/adc.c         |  1 +
 lib/adc.h         |  1 +
 lib/calc.h        |  2 ++
 lib/debounce.h    |  1 +
 lib/sd_blockdev.h |  1 +
 lib/sd_fat.h      |  2 ++
 lib/sipo_pwm.c    | 83 +++++++++++++++++++++++++++++++++++++++++++++++
 lib/sipo_pwm.h    | 44 +++++++++++++++++++++++++
 lib/wsrgb.h       |  2 ++
 9 files changed, 137 insertions(+)
 create mode 100644 lib/sipo_pwm.c
 create mode 100644 lib/sipo_pwm.h

diff --git a/lib/adc.c b/lib/adc.c
index da4bcfc..0de38eb 100644
--- a/lib/adc.c
+++ b/lib/adc.c
@@ -1,5 +1,6 @@
 #include <avr/io.h>
 #include <stdbool.h>
+#include <stdint.h>
 
 #include "calc.h"
 #include "adc.h"
diff --git a/lib/adc.h b/lib/adc.h
index fdd08d2..4f7a3f6 100644
--- a/lib/adc.h
+++ b/lib/adc.h
@@ -5,6 +5,7 @@
 //
 
 #include <avr/io.h>
+#include <stdint.h>
 
 /** Initialize the ADC */
 void adc_init();
diff --git a/lib/calc.h b/lib/calc.h
index 9b74562..2d150e6 100644
--- a/lib/calc.h
+++ b/lib/calc.h
@@ -4,6 +4,8 @@
 // Bit and byte manipulation utilities
 //
 
+#include <stdint.h>
+
 
 // --- Increment in range ---
 // when overflown, wraps within range. Lower bound < upper bound.
diff --git a/lib/debounce.h b/lib/debounce.h
index 42ea71c..ab903d6 100644
--- a/lib/debounce.h
+++ b/lib/debounce.h
@@ -29,6 +29,7 @@
 
 #include <avr/io.h>
 #include <stdbool.h>
+#include <stdint.h>
 
 #include "calc.h"
 #include "iopins.h"
diff --git a/lib/sd_blockdev.h b/lib/sd_blockdev.h
index 68e53b8..fc479fa 100644
--- a/lib/sd_blockdev.h
+++ b/lib/sd_blockdev.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include "blockdev.h"
+#include <stdbool.h>
 
 /** Initialize the SD card block device */
 bool sdb_init(BLOCKDEV* dev);
diff --git a/lib/sd_fat.h b/lib/sd_fat.h
index 1940ca0..7bbbc01 100644
--- a/lib/sd_fat.h
+++ b/lib/sd_fat.h
@@ -7,6 +7,8 @@
 // and hides the implementation. All regular ff_* functions will work on the FFILE.
 //
 
+#include <stdint.h>
+
 #include "fat16.h"
 #include "stream.h"
 
diff --git a/lib/sipo_pwm.c b/lib/sipo_pwm.c
new file mode 100644
index 0000000..3c0fab4
--- /dev/null
+++ b/lib/sipo_pwm.c
@@ -0,0 +1,83 @@
+#include <avr/io.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "sipo_pwm.h"
+#include "iopins.h"
+#include "sipo_pwm_config.h"
+
+
+/* -------- SIPO PWM MODULE ---------- */
+
+/** Buffer for sending bits to SIPO */
+bool _buff[SPWM_CHANNELS];
+
+uint8_t spwm_levels[SPWM_CHANNELS];
+
+
+/** Send _buff to SIPO */
+void _send_buffer()
+{
+	for (int8_t i = SPWM_CHANNELS - 1; i >= 0; i--)
+	{
+		#if (SPWM_INVERT)
+		set_pin(SPWM_DATA, !_buff[i]); /* Common anode */
+		#else
+		set_pin(SPWM_DATA, _buff[i]);  /* Common cathode */
+		#endif
+
+		// send a CLK pulse
+		pin_high(SPWM_CLK);
+		pin_low(SPWM_CLK);
+	}
+
+	// send a STR pulse
+	pin_high(SPWM_STR);
+	pin_low(SPWM_STR);
+}
+
+
+void spwm_init()
+{
+	// Pin directions
+	as_output(SPWM_CLK);
+	as_output(SPWM_STR);
+	as_output(SPWM_DATA);
+
+	// Initial states
+	pin_low(SPWM_CLK);
+	pin_low(SPWM_STR);
+}
+
+
+/**
+ * Display PWM channels.
+ * This could be called in a Timer ISR.
+ */
+void spwm_send()
+{
+	// Set all bits to 1 (if their PWM level is 0, set to 0)
+	for (uint8_t bit = 0; bit < SPWM_CHANNELS; bit++)
+	{
+		_buff[bit] = (bool) spwm_levels[bit];
+	}
+
+	// Show initial state
+	_send_buffer();
+
+	// For each PWM level...
+	for (uint16_t pwm = 0; pwm < SPWM_COLOR_DEPTH; pwm++)
+	{
+		// Turn OFF bits that are below the level
+		for (uint8_t bit = 0; bit < SPWM_CHANNELS; bit++)
+		{
+			if (spwm_levels[bit] < pwm)
+			{
+				_buff[bit] = 0;
+			}
+		}
+
+		// And show...
+		_send_buffer();
+	}
+}
diff --git a/lib/sipo_pwm.h b/lib/sipo_pwm.h
new file mode 100644
index 0000000..ed6a3df
--- /dev/null
+++ b/lib/sipo_pwm.h
@@ -0,0 +1,44 @@
+#pragma once
+
+// --- SIPO PWM Module ---
+//
+// SIPO = Serial IN, Parallel OUT
+//
+// This module lets you use SIPO outputs as a "software PWM".
+//
+// Tested on 74HC4094,
+// should also work on 74HC595 (may need some small changes)
+
+#include <stdint.h>
+
+// Your file with configs
+#include "sipo_pwm_config.h"
+/*
+	// PWM pin aliases
+	#define SPWM_STR  D2
+	#define SPWM_CLK  D3
+	#define SPWM_DATA D4
+
+	// Number of PWM levels (color depth)
+	#define SPWM_COLOR_DEPTH 256
+
+	// Number of SIPO channels
+	#define SPWM_CHANNELS 24
+
+	// Invert outputs (for Common Anode LEDs)
+	#define SPWM_INVERT 1
+*/
+
+
+// Array for setting PWM levels (PWM_CHANNELS-long)
+extern uint8_t spwm_levels[SPWM_CHANNELS];
+
+
+/** Configure output pins etc */
+void spwm_init();
+
+
+/** Display PWM channels.
+ * This could be called in a Timer ISR.
+ */
+void spwm_send();
diff --git a/lib/wsrgb.h b/lib/wsrgb.h
index 391bd1f..a7d98db 100644
--- a/lib/wsrgb.h
+++ b/lib/wsrgb.h
@@ -8,6 +8,8 @@
 // Create a config file rgb_config.h next to your main.c
 //
 
+#include <stdint.h>
+
 #include "iopins.h"
 #include "color.h"