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-rw-r--r--drivers/avr/ws2812.c384
1 files changed, 179 insertions, 205 deletions
diff --git a/drivers/avr/ws2812.c b/drivers/avr/ws2812.c
index 7c3cb5174d..0a02c6f7fd 100644
--- a/drivers/avr/ws2812.c
+++ b/drivers/avr/ws2812.c
@@ -1,25 +1,25 @@
/*
-* light weight WS2812 lib V2.0b
-*
-* Controls WS2811/WS2812/WS2812B RGB-LEDs
-* Author: Tim (cpldcpu@gmail.com)
-*
-* Jan 18th, 2014 v2.0b Initial Version
-* Nov 29th, 2015 v2.3 Added SK6812RGBW support
-*
-* 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/>.
-*/
+ * light weight WS2812 lib V2.0b
+ *
+ * Controls WS2811/WS2812/WS2812B RGB-LEDs
+ * Author: Tim (cpldcpu@gmail.com)
+ *
+ * Jan 18th, 2014 v2.0b Initial Version
+ * Nov 29th, 2015 v2.3 Added SK6812RGBW support
+ *
+ * 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 "ws2812.h"
#include <avr/interrupt.h>
@@ -30,44 +30,40 @@
#if !defined(LED_ARRAY) && defined(RGB_MATRIX_ENABLE)
// LED color buffer
LED_TYPE led[DRIVER_LED_TOTAL];
- #define LED_ARRAY led
+# define LED_ARRAY led
#endif
#ifdef RGBW_BB_TWI
// Port for the I2C
-#define I2C_DDR DDRD
-#define I2C_PIN PIND
-#define I2C_PORT PORTD
+# define I2C_DDR DDRD
+# define I2C_PIN PIND
+# define I2C_PORT PORTD
// Pins to be used in the bit banging
-#define I2C_CLK 0
-#define I2C_DAT 1
-
-#define I2C_DATA_HI()\
-I2C_DDR &= ~ (1 << I2C_DAT);\
-I2C_PORT |= (1 << I2C_DAT);
-#define I2C_DATA_LO()\
-I2C_DDR |= (1 << I2C_DAT);\
-I2C_PORT &= ~ (1 << I2C_DAT);
-
-#define I2C_CLOCK_HI()\
-I2C_DDR &= ~ (1 << I2C_CLK);\
-I2C_PORT |= (1 << I2C_CLK);
-#define I2C_CLOCK_LO()\
-I2C_DDR |= (1 << I2C_CLK);\
-I2C_PORT &= ~ (1 << I2C_CLK);
-
-#define I2C_DELAY 1
-
-void I2C_WriteBit(unsigned char c)
-{
- if (c > 0)
- {
+# define I2C_CLK 0
+# define I2C_DAT 1
+
+# define I2C_DATA_HI() \
+ I2C_DDR &= ~(1 << I2C_DAT); \
+ I2C_PORT |= (1 << I2C_DAT);
+# define I2C_DATA_LO() \
+ I2C_DDR |= (1 << I2C_DAT); \
+ I2C_PORT &= ~(1 << I2C_DAT);
+
+# define I2C_CLOCK_HI() \
+ I2C_DDR &= ~(1 << I2C_CLK); \
+ I2C_PORT |= (1 << I2C_CLK);
+# define I2C_CLOCK_LO() \
+ I2C_DDR |= (1 << I2C_CLK); \
+ I2C_PORT &= ~(1 << I2C_CLK);
+
+# define I2C_DELAY 1
+
+void I2C_WriteBit(unsigned char c) {
+ if (c > 0) {
I2C_DATA_HI();
- }
- else
- {
+ } else {
I2C_DATA_LO();
}
@@ -77,8 +73,7 @@ void I2C_WriteBit(unsigned char c)
I2C_CLOCK_LO();
_delay_us(I2C_DELAY);
- if (c > 0)
- {
+ if (c > 0) {
I2C_DATA_LO();
}
@@ -87,9 +82,8 @@ void I2C_WriteBit(unsigned char c)
// Inits bitbanging port, must be called before using the functions below
//
-void I2C_Init(void)
-{
- I2C_PORT &= ~ ((1 << I2C_DAT) | (1 << I2C_CLK));
+void I2C_Init(void) {
+ I2C_PORT &= ~((1 << I2C_DAT) | (1 << I2C_CLK));
I2C_CLOCK_HI();
I2C_DATA_HI();
@@ -99,10 +93,9 @@ void I2C_Init(void)
// Send a START Condition
//
-void I2C_Start(void)
-{
+void I2C_Start(void) {
// set both to high at the same time
- I2C_DDR &= ~ ((1 << I2C_DAT) | (1 << I2C_CLK));
+ I2C_DDR &= ~((1 << I2C_DAT) | (1 << I2C_CLK));
_delay_us(I2C_DELAY);
I2C_DATA_LO();
@@ -114,8 +107,7 @@ void I2C_Start(void)
// Send a STOP Condition
//
-void I2C_Stop(void)
-{
+void I2C_Stop(void) {
I2C_CLOCK_HI();
_delay_us(I2C_DELAY);
@@ -125,106 +117,91 @@ void I2C_Stop(void)
// write a byte to the I2C slave device
//
-unsigned char I2C_Write(unsigned char c)
-{
- for (char i = 0; i < 8; i++)
- {
+unsigned char I2C_Write(unsigned char c) {
+ for (char i = 0; i < 8; i++) {
I2C_WriteBit(c & 128);
c <<= 1;
}
-
I2C_WriteBit(0);
_delay_us(I2C_DELAY);
_delay_us(I2C_DELAY);
// _delay_us(I2C_DELAY);
- //return I2C_ReadBit();
+ // return I2C_ReadBit();
return 0;
}
-
#endif
#ifdef RGB_MATRIX_ENABLE
// Set an led in the buffer to a color
-void inline ws2812_setled(int i, uint8_t r, uint8_t g, uint8_t b)
-{
+void inline ws2812_setled(int i, uint8_t r, uint8_t g, uint8_t b) {
led[i].r = r;
led[i].g = g;
led[i].b = b;
}
-void ws2812_setled_all (uint8_t r, uint8_t g, uint8_t b)
-{
- for (int i = 0; i < sizeof(led)/sizeof(led[0]); i++) {
- led[i].r = r;
- led[i].g = g;
- led[i].b = b;
- }
+void ws2812_setled_all(uint8_t r, uint8_t g, uint8_t b) {
+ for (int i = 0; i < sizeof(led) / sizeof(led[0]); i++) {
+ led[i].r = r;
+ led[i].g = g;
+ led[i].b = b;
+ }
}
#endif
// Setleds for standard RGB
-void inline ws2812_setleds(LED_TYPE *ledarray, uint16_t leds)
-{
- // ws2812_setleds_pin(ledarray,leds, _BV(ws2812_pin));
- ws2812_setleds_pin(ledarray,leds, _BV(RGB_DI_PIN & 0xF));
+void inline ws2812_setleds(LED_TYPE *ledarray, uint16_t leds) {
+ // ws2812_setleds_pin(ledarray,leds, _BV(ws2812_pin));
+ ws2812_setleds_pin(ledarray, leds, _BV(RGB_DI_PIN & 0xF));
}
-void inline ws2812_setleds_pin(LED_TYPE *ledarray, uint16_t leds, uint8_t pinmask)
-{
- // ws2812_DDRREG |= pinmask; // Enable DDR
- // new universal format (DDR)
- _SFR_IO8((RGB_DI_PIN >> 4) + 1) |= pinmask;
+void inline ws2812_setleds_pin(LED_TYPE *ledarray, uint16_t leds, uint8_t pinmask) {
+ // ws2812_DDRREG |= pinmask; // Enable DDR
+ // new universal format (DDR)
+ _SFR_IO8((RGB_DI_PIN >> 4) + 1) |= pinmask;
- ws2812_sendarray_mask((uint8_t*)ledarray,leds+leds+leds,pinmask);
- _delay_us(50);
+ ws2812_sendarray_mask((uint8_t *)ledarray, leds + leds + leds, pinmask);
+ _delay_us(50);
}
// Setleds for SK6812RGBW
-void inline ws2812_setleds_rgbw(LED_TYPE *ledarray, uint16_t leds)
-{
-
- #ifdef RGBW_BB_TWI
+void inline ws2812_setleds_rgbw(LED_TYPE *ledarray, uint16_t leds) {
+#ifdef RGBW_BB_TWI
uint8_t sreg_prev, twcr_prev;
- sreg_prev=SREG;
- twcr_prev=TWCR;
+ sreg_prev = SREG;
+ twcr_prev = TWCR;
cli();
- TWCR &= ~(1<<TWEN);
+ TWCR &= ~(1 << TWEN);
I2C_Init();
I2C_Start();
I2C_Write(0x84);
- uint16_t datlen = leds<<2;
- uint8_t curbyte;
- uint8_t * data = (uint8_t*)ledarray;
+ uint16_t datlen = leds << 2;
+ uint8_t curbyte;
+ uint8_t *data = (uint8_t *)ledarray;
while (datlen--) {
- curbyte=*data++;
- I2C_Write(curbyte);
+ curbyte = *data++;
+ I2C_Write(curbyte);
}
I2C_Stop();
- SREG=sreg_prev;
- TWCR=twcr_prev;
- #endif
-
-
- // ws2812_DDRREG |= _BV(ws2812_pin); // Enable DDR
- // new universal format (DDR)
- _SFR_IO8((RGB_DI_PIN >> 4) + 1) |= _BV(RGB_DI_PIN & 0xF);
+ SREG = sreg_prev;
+ TWCR = twcr_prev;
+#endif
- ws2812_sendarray_mask((uint8_t*)ledarray,leds<<2,_BV(RGB_DI_PIN & 0xF));
+ // ws2812_DDRREG |= _BV(ws2812_pin); // Enable DDR
+ // new universal format (DDR)
+ _SFR_IO8((RGB_DI_PIN >> 4) + 1) |= _BV(RGB_DI_PIN & 0xF);
+ ws2812_sendarray_mask((uint8_t *)ledarray, leds << 2, _BV(RGB_DI_PIN & 0xF));
- #ifndef RGBW_BB_TWI
+#ifndef RGBW_BB_TWI
_delay_us(80);
- #endif
+#endif
}
-void ws2812_sendarray(uint8_t *data,uint16_t datlen)
-{
- ws2812_sendarray_mask(data,datlen,_BV(RGB_DI_PIN & 0xF));
-}
+void ws2812_sendarray(uint8_t *data, uint16_t datlen) { ws2812_sendarray_mask(data, datlen, _BV(RGB_DI_PIN & 0xF)); }
/*
This routine writes an array of bytes with RGB values to the Dataout pin
@@ -232,136 +209,133 @@ void ws2812_sendarray(uint8_t *data,uint16_t datlen)
*/
// Timing in ns
-#define w_zeropulse 350
-#define w_onepulse 900
+#define w_zeropulse 350
+#define w_onepulse 900
#define w_totalperiod 1250
// Fixed cycles used by the inner loop
-#define w_fixedlow 2
-#define w_fixedhigh 4
-#define w_fixedtotal 8
+#define w_fixedlow 2
+#define w_fixedhigh 4
+#define w_fixedtotal 8
// Insert NOPs to match the timing, if possible
-#define w_zerocycles (((F_CPU/1000)*w_zeropulse )/1000000)
-#define w_onecycles (((F_CPU/1000)*w_onepulse +500000)/1000000)
-#define w_totalcycles (((F_CPU/1000)*w_totalperiod +500000)/1000000)
+#define w_zerocycles (((F_CPU / 1000) * w_zeropulse) / 1000000)
+#define w_onecycles (((F_CPU / 1000) * w_onepulse + 500000) / 1000000)
+#define w_totalcycles (((F_CPU / 1000) * w_totalperiod + 500000) / 1000000)
// w1 - nops between rising edge and falling edge - low
-#define w1 (w_zerocycles-w_fixedlow)
+#define w1 (w_zerocycles - w_fixedlow)
// w2 nops between fe low and fe high
-#define w2 (w_onecycles-w_fixedhigh-w1)
+#define w2 (w_onecycles - w_fixedhigh - w1)
// w3 nops to complete loop
-#define w3 (w_totalcycles-w_fixedtotal-w1-w2)
+#define w3 (w_totalcycles - w_fixedtotal - w1 - w2)
-#if w1>0
- #define w1_nops w1
+#if w1 > 0
+# define w1_nops w1
#else
- #define w1_nops 0
+# define w1_nops 0
#endif
// The only critical timing parameter is the minimum pulse length of the "0"
// Warn or throw error if this timing can not be met with current F_CPU settings.
-#define w_lowtime ((w1_nops+w_fixedlow)*1000000)/(F_CPU/1000)
-#if w_lowtime>550
- #error "Light_ws2812: Sorry, the clock speed is too low. Did you set F_CPU correctly?"
-#elif w_lowtime>450
- #warning "Light_ws2812: The timing is critical and may only work on WS2812B, not on WS2812(S)."
- #warning "Please consider a higher clockspeed, if possible"
+#define w_lowtime ((w1_nops + w_fixedlow) * 1000000) / (F_CPU / 1000)
+#if w_lowtime > 550
+# error "Light_ws2812: Sorry, the clock speed is too low. Did you set F_CPU correctly?"
+#elif w_lowtime > 450
+# warning "Light_ws2812: The timing is critical and may only work on WS2812B, not on WS2812(S)."
+# warning "Please consider a higher clockspeed, if possible"
#endif
-#if w2>0
-#define w2_nops w2
+#if w2 > 0
+# define w2_nops w2
#else
-#define w2_nops 0
+# define w2_nops 0
#endif
-#if w3>0
-#define w3_nops w3
+#if w3 > 0
+# define w3_nops w3
#else
-#define w3_nops 0
+# define w3_nops 0
#endif
-#define w_nop1 "nop \n\t"
-#define w_nop2 "rjmp .+0 \n\t"
-#define w_nop4 w_nop2 w_nop2
-#define w_nop8 w_nop4 w_nop4
+#define w_nop1 "nop \n\t"
+#define w_nop2 "rjmp .+0 \n\t"
+#define w_nop4 w_nop2 w_nop2
+#define w_nop8 w_nop4 w_nop4
#define w_nop16 w_nop8 w_nop8
-void inline ws2812_sendarray_mask(uint8_t *data,uint16_t datlen,uint8_t maskhi)
-{
- uint8_t curbyte,ctr,masklo;
- uint8_t sreg_prev;
-
- // masklo =~maskhi&ws2812_PORTREG;
- // maskhi |= ws2812_PORTREG;
- masklo =~maskhi&_SFR_IO8((RGB_DI_PIN >> 4) + 2);
- maskhi |= _SFR_IO8((RGB_DI_PIN >> 4) + 2);
- sreg_prev=SREG;
- cli();
-
- while (datlen--) {
- curbyte=(*data++);
-
- asm volatile(
- " ldi %0,8 \n\t"
- "loop%=: \n\t"
- " out %2,%3 \n\t" // '1' [01] '0' [01] - re
-#if (w1_nops&1)
-w_nop1
+void inline ws2812_sendarray_mask(uint8_t *data, uint16_t datlen, uint8_t maskhi) {
+ uint8_t curbyte, ctr, masklo;
+ uint8_t sreg_prev;
+
+ // masklo =~maskhi&ws2812_PORTREG;
+ // maskhi |= ws2812_PORTREG;
+ masklo = ~maskhi & _SFR_IO8((RGB_DI_PIN >> 4) + 2);
+ maskhi |= _SFR_IO8((RGB_DI_PIN >> 4) + 2);
+ sreg_prev = SREG;
+ cli();
+
+ while (datlen--) {
+ curbyte = (*data++);
+
+ asm volatile(" ldi %0,8 \n\t"
+ "loop%=: \n\t"
+ " out %2,%3 \n\t" // '1' [01] '0' [01] - re
+#if (w1_nops & 1)
+ w_nop1
#endif
-#if (w1_nops&2)
-w_nop2
+#if (w1_nops & 2)
+ w_nop2
#endif
-#if (w1_nops&4)
-w_nop4
+#if (w1_nops & 4)
+ w_nop4
#endif
-#if (w1_nops&8)
-w_nop8
+#if (w1_nops & 8)
+ w_nop8
#endif
-#if (w1_nops&16)
-w_nop16
+#if (w1_nops & 16)
+ w_nop16
#endif
- " sbrs %1,7 \n\t" // '1' [03] '0' [02]
- " out %2,%4 \n\t" // '1' [--] '0' [03] - fe-low
- " lsl %1 \n\t" // '1' [04] '0' [04]
-#if (w2_nops&1)
- w_nop1
+ " sbrs %1,7 \n\t" // '1' [03] '0' [02]
+ " out %2,%4 \n\t" // '1' [--] '0' [03] - fe-low
+ " lsl %1 \n\t" // '1' [04] '0' [04]
+#if (w2_nops & 1)
+ w_nop1
#endif
-#if (w2_nops&2)
- w_nop2
+#if (w2_nops & 2)
+ w_nop2
#endif
-#if (w2_nops&4)
- w_nop4
+#if (w2_nops & 4)
+ w_nop4
#endif
-#if (w2_nops&8)
- w_nop8
+#if (w2_nops & 8)
+ w_nop8
#endif
-#if (w2_nops&16)
- w_nop16
+#if (w2_nops & 16)
+ w_nop16
#endif
- " out %2,%4 \n\t" // '1' [+1] '0' [+1] - fe-high
-#if (w3_nops&1)
-w_nop1
+ " out %2,%4 \n\t" // '1' [+1] '0' [+1] - fe-high
+#if (w3_nops & 1)
+ w_nop1
#endif
-#if (w3_nops&2)
-w_nop2
+#if (w3_nops & 2)
+ w_nop2
#endif
-#if (w3_nops&4)
-w_nop4
+#if (w3_nops & 4)
+ w_nop4
#endif
-#if (w3_nops&8)
-w_nop8
+#if (w3_nops & 8)
+ w_nop8
#endif
-#if (w3_nops&16)
-w_nop16
+#if (w3_nops & 16)
+ w_nop16
#endif
- " dec %0 \n\t" // '1' [+2] '0' [+2]
- " brne loop%=\n\t" // '1' [+3] '0' [+4]
- : "=&d" (ctr)
- : "r" (curbyte), "I" (_SFR_IO_ADDR(_SFR_IO8((RGB_DI_PIN >> 4) + 2))), "r" (maskhi), "r" (masklo)
- );
- }
+ " dec %0 \n\t" // '1' [+2] '0' [+2]
+ " brne loop%=\n\t" // '1' [+3] '0' [+4]
+ : "=&d"(ctr)
+ : "r"(curbyte), "I"(_SFR_IO_ADDR(_SFR_IO8((RGB_DI_PIN >> 4) + 2))), "r"(maskhi), "r"(masklo));
+ }
- SREG=sreg_prev;
+ SREG = sreg_prev;
}
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