From 6f50c7eba19c5b9e60387e70928300a86f0d4816 Mon Sep 17 00:00:00 2001
From: Mikkel Jeppesen <2756925+Duckle29@users.noreply.github.com>
Date: Fri, 15 Feb 2019 20:32:31 +0100
Subject: Added APA102 support (#4940)
* Fixed pin for RGB
* Re-did apa102 stuff
* changed to use pincontrol functions
* Removed a newline?
* Changed to comply with project style
---
drivers/avr/apa102.c | 101 +++++++++++++++++++++++++++++++++++++++++++++++++++
drivers/avr/apa102.h | 46 +++++++++++++++++++++++
2 files changed, 147 insertions(+)
create mode 100755 drivers/avr/apa102.c
create mode 100755 drivers/avr/apa102.h
(limited to 'drivers/avr')
diff --git a/drivers/avr/apa102.c b/drivers/avr/apa102.c
new file mode 100755
index 0000000000..55a0d57778
--- /dev/null
+++ b/drivers/avr/apa102.c
@@ -0,0 +1,101 @@
+/*
+* APA102 lib V1.0a
+*
+* Controls APA102 RGB-LEDs
+* Author: Mikkel (Duckle29 on github)
+*
+* Dec 22th, 2017 v1.0a Initial Version
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 2 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program. If not, see .
+*/
+
+#include "apa102.h"
+#include
+#include
+#include
+#include "debug.h"
+
+// Setleds for standard RGB
+void inline apa102_setleds(LED_TYPE *ledarray, uint16_t leds){
+ apa102_setleds_pin(ledarray,leds, _BV(RGB_DI_PIN & 0xF), _BV(RGB_CLK_PIN & 0xF));
+}
+
+void static inline apa102_setleds_pin(LED_TYPE *ledarray, uint16_t leds, uint8_t pinmask_DI, uint8_t pinmask_CLK){
+ pinMode(RGB_DI_PIN, PinDirectionOutput);
+ pinMode(RGB_CLK_PIN, PinDirectionOutput);
+
+ apa102_send_array((uint8_t*)ledarray,leds)
+}
+
+void apa102_send_array(uint8_t *data, uint16_t leds){ // Data is struct of 3 bytes. RGB - leds is number of leds in data
+ apa102_start_frame();
+ while(leds--){
+ apa102_send_frame(0xFF000000 | (data->b << 16) | (data->g << 8) | data->r);
+ data++;
+ }
+ apa102_end_frame(leds);
+}
+
+void apa102_send_frame(uint32_t frame){
+ for(uint32_t i=0xFF; i>0;){
+ apa102_send_byte(frame & i);
+ i = i << 8;
+ }
+}
+
+void apa102_start_frame(){
+ apa102_send_frame(0);
+}
+
+void apa102_end_frame(uint16_t leds)
+{
+ // This function has been taken from: https://github.com/pololu/apa102-arduino/blob/master/APA102.h
+ // and adapted. The code is MIT licensed. I think thats compatible?
+
+ // We need to send some more bytes to ensure that all the LEDs in the
+ // chain see their new color and start displaying it.
+ //
+ // The data stream seen by the last LED in the chain will be delayed by
+ // (count - 1) clock edges, because each LED before it inverts the clock
+ // line and delays the data by one clock edge. Therefore, to make sure
+ // the last LED actually receives the data we wrote, the number of extra
+ // edges we send at the end of the frame must be at least (count - 1).
+ // For the APA102C, that is sufficient.
+ //
+ // The SK9822 only updates after it sees 32 zero bits followed by one more
+ // rising edge. To avoid having the update time depend on the color of
+ // the last LED, we send a dummy 0xFF byte. (Unfortunately, this means
+ // that partial updates of the beginning of an LED strip are not possible;
+ // the LED after the last one you are trying to update will be black.)
+ // After that, to ensure that the last LED in the chain sees 32 zero bits
+ // and a rising edge, we need to send at least 65 + (count - 1) edges. It
+ // is sufficent and simpler to just send (5 + count/16) bytes of zeros.
+ //
+ // We are ignoring the specification for the end frame in the APA102/SK9822
+ // datasheets because it does not actually ensure that all the LEDs will
+ // start displaying their new colors right away.
+
+ apa102_send_byte(0xFF);
+ for (uint16_t i = 0; i < 5 + leds / 16; i++){
+ apa102_send_byte(0);
+ }
+}
+
+void apa102_send_byte(uint8_t byte){
+ uint8_t i;
+ for (i = 0; i < 8; i++){
+ digitalWrite(RGB_DI_PIN, !!(byte & (1 << (7-i)));
+ digitalWrite(RGB_CLK_PIN, PinLevelHigh);
+ }
+}
diff --git a/drivers/avr/apa102.h b/drivers/avr/apa102.h
new file mode 100755
index 0000000000..e7d7c3684f
--- /dev/null
+++ b/drivers/avr/apa102.h
@@ -0,0 +1,46 @@
+/*
+ * light weight WS2812 lib include
+ *
+ * Version 2.3 - Nev 29th 2015
+ * Author: Tim (cpldcpu@gmail.com)
+ *
+ * Please do not change this file! All configuration is handled in "ws2812_config.h"
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#pragma once
+
+#include
+#include
+
+#include "rgblight_types.h"
+
+
+/* User Interface
+ *
+ * Input:
+ * ledarray: An array of GRB data describing the LED colors
+ * number_of_leds: The number of LEDs to write
+ * pinmask (optional): Bitmask describing the output bin. e.g. _BV(PB0)
+ *
+ * The functions will perform the following actions:
+ * - Set the data-out pin as output
+ * - Send out the LED data
+ * - Wait 50�s to reset the LEDs
+ */
+
+void apa102_setleds (LED_TYPE *ledarray, uint16_t number_of_leds);
+void apa102_setleds_pin (LED_TYPE *ledarray, uint16_t number_of_leds,uint8_t pinmask);
+void apa102_setleds_rgbw(LED_TYPE *ledarray, uint16_t number_of_leds);
--
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