summaryrefslogtreecommitdiff
path: root/platforms/avr
diff options
context:
space:
mode:
Diffstat (limited to 'platforms/avr')
-rw-r--r--platforms/avr/drivers/apa102.c96
-rw-r--r--platforms/avr/drivers/serial.c5
2 files changed, 101 insertions, 0 deletions
diff --git a/platforms/avr/drivers/apa102.c b/platforms/avr/drivers/apa102.c
new file mode 100644
index 0000000000..740acb5739
--- /dev/null
+++ b/platforms/avr/drivers/apa102.c
@@ -0,0 +1,96 @@
+/*
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include "apa102.h"
+#include <avr/interrupt.h>
+#include <avr/io.h>
+#include <util/delay.h>
+#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) {
+ setPinOutput(RGB_DI_PIN);
+ setPinOutput(RGB_CLK_PIN);
+
+ 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++) {
+ writePin(RGB_DI_PIN, !!(byte & (1 << (7 - i))));
+ writePinHigh(RGB_CLK_PIN);
+ }
+}
diff --git a/platforms/avr/drivers/serial.c b/platforms/avr/drivers/serial.c
index 6a36aa5f7f..31eab7b7c0 100644
--- a/platforms/avr/drivers/serial.c
+++ b/platforms/avr/drivers/serial.c
@@ -53,8 +53,13 @@
# define EICRx EICRA
# endif
+<<<<<<< HEAD
+// ATmegaxxU2 specific config
+# if defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__)
+=======
// ATmegaxxU2/AT90USB162 specific config
# if defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__) || defined(__AVR_AT90USB162__)
+>>>>>>> 0.12.52~1
// PD4(INT5), PD6(INT6), PD7(INT7), PC7(INT4)
# if SOFT_SERIAL_PIN == D4
# define EIMSK_BIT _BV(INT5)