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76 lines
1.7 KiB
76 lines
1.7 KiB
10 years ago
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#include <avr/io.h>
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#include <avr/sfr_defs.h>
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#include <util/delay_basic.h>
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#include <stdint.h>
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#include "ws_driver3.h"
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#define WS_PORT PORTB
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#define WS_BIT 0
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uint16_t ws_port = _SFR_ADDR(PORTB);
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uint8_t ws_bit;
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/** Raise the bus line *///_SFR_MEM8(ws_port)
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#define ws_high() do { _SFR_MEM8(ws_port) |= (1 << 0); } while(0)
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//#define ws_high() (_SFR_MEM8(_SFR_ADDR(PORTB))) |= (1 << WS_BIT)
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/** Drop the bus line */
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#define ws_low() do { _SFR_MEM8(ws_port) &= ~(1 << 0); } while(0)
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//#define ws_low() (_SFR_MEM8(_SFR_ADDR(PORTB))) &= ~(1 << WS_BIT)
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/* Convert nanoseconds to cycle count */
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#define ns2cycles(ns) ( (ns) / (1000000000L / (signed long) F_CPU) )
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/** Wait c cycles */
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#define delay_c(c) (((c) > 0) ? __builtin_avr_delay_cycles(c) : __builtin_avr_delay_cycles(0))
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/** Wait n nanoseconds, plus c cycles */
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#define delay_ns_c(ns, c) delay_c(ns2cycles(ns) + (c))
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void ws_bind(uint8_t port_addr, uint8_t bit)
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{
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// ws_port = port_addr;
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// ws_bit = bit;
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}
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/** Latch and display the RGB values */
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void ws_show()
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{
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ws_low();
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delay_ns_c(WS_T_LATCH, 0);
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}
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#define _do_ws_send_byte(x) do { \
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for (int8_t i = 7; i >= 0; --i) { \
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if (x & (1 << i)) { \
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ws_high(); \
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delay_ns_c(WS_T_1H, -2); \
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ws_low(); \
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delay_ns_c(WS_T_1L, -10); \
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} else { \
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ws_high(); \
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delay_ns_c(WS_T_0H, -2); \
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ws_low(); \
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delay_ns_c(WS_T_0L, -10); \
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} \
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} \
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} while(0)
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void ws_send_byte(uint8_t b)
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{
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_do_ws_send_byte(b);
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}
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/** Send RGB color to the strip */
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void ws_send_rgb(uint8_t r, uint8_t g, uint8_t b)
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{
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_do_ws_send_byte(g);
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_do_ws_send_byte(r);
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_do_ws_send_byte(b);
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}
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