#ifndef WS2811_h
#define WS2811_h
#include <avr/io.h>
#include <util/delay.h>
#include <WS2811.h>
typedef struct __attribute__ ((__packed__)) {
uint8_t r;
uint8_t g;
uint8_t b;
} RGB_t;
错误2预期':', ',', ';', '}' or '__attribute__' before 'r'
请帮帮我！感谢
感谢您的帮助，但没有成功!!! 主要代码在这里：
/*
* WS2811 RGB LED driver.
*/
#include <stdio.h>
#include <stdint.h>
#ifndef WS2811_h
#define WS2811_h
#endif
#include <WS2811.h>
// RGB value structure.
typedef struct __attribute__ ((__packed__)) {
uint8_t r;
uint8_t g;
uint8_t b;
} RGB_t;
#ifndef ARRAYLEN
#define ARRAYLEN(A) (sizeof(A) / sizeof(A[0]))
#endif
/*
* Inline asm macro to output 24-bit RGB value in (G,R,B) order, MSBit first.
* 0 bits are 250ns hi, 1000ns lo, 1 bits are 1000ns hi, 250ns lo.
* r18 = red byte to be output
* r19 = green byte to be output
* r20 = blue byte to be output
* r26 = saved SREG
* r27 = inner loop counter
*/
#define WS2811(PORT, PIN, RGB, LEN) \
asm volatile( \
/* initialise */ \
" cp %A[len], r1 ; check len > 0, return immediately if it is\n" \
" cpc %B[len], r1\n" \
" brne 1f\n" \
" rjmp 16f\n" \
"1: ld r18, Z+ ; load in first red byte to be output\n" \
" ld r19, Z+ ; load in first green byte to be output\n" \
" ld r20, Z+ ; load in first blue byte to be output\n" \
" ldi r27, 8 ; load inner loop counter\n" \
" in r26, __SREG__ ; timing-critical, so no interrupts\n" \
" cli\n" \
/* green - loop over 8 bits */ \
"2: sbi %[port], %[pin] ; pin lo -> hi\n" \
" sbrc r19, 7 ; test hi bit clear\n" \
" rjmp 3f ; true, skip pin hi -> lo\n" \
" cbi %[port], %[pin] ; false, pin hi -> lo\n" \
"3: sbrc r19, 7 ; equalise delay of both code paths\n" \
" rjmp 4f\n" \
"4: nop ; pulse timing delay\n" \
" nop\n" \
" nop\n" \
" nop\n" \
" nop\n" \
" nop\n" \
" lsl r19 ; shift to next bit\n" \
" dec r27 ; decrement loop counter\n" \
" cbi %[port], %[pin] ; pin hi -> lo\n" \
" brne 2b\n ; loop if required\n" \
" ldi r27, 7 ; reload inner loop counter\n" \
/* red - loop over first 7 bits */ \
"5: sbi %[port], %[pin] ; pin lo -> hi\n" \
" sbrc r18, 7 ; test hi bit clear\n" \
" rjmp 6f ; true, skip pin hi -> lo\n" \
" cbi %[port], %[pin] ; false, pin hi -> lo\n" \
"6: sbrc r18, 7 ; equalise delay of both code paths\n" \
" rjmp 7f\n" \
"7: nop ; pulse timing delay\n" \
" nop\n" \
" nop\n" \
" nop\n" \
" nop\n" \
" nop\n" \
" lsl r18 ; shift to next bit\n" \
" dec r27 ; decrement inner loop counter\n" \
" cbi %[port], %[pin] ; pin hi -> lo\n" \
" brne 5b ; inner loop, if required\n" \
" nop ; equalise delay of both code paths\n" \
/* red, 8th bit - output & fetch next values */ \
" sbi %[port], %[pin] ; pin lo -> hi\n" \
" sbrc r18, 7 ; test hi bit clear\n" \
" rjmp 8f ; true, skip pin hi -> lo\n" \
" cbi %[port], %[pin] ; false, pin hi -> lo\n" \
"8: sbrc r18, 7 ; equalise delay of both code paths\n" \
" rjmp 9f\n" \
"9: nop ; pulse timing delay\n" \
" nop\n" \
" nop\n" \
" ld r18, Z+ ; load next red byte\n" \
" ld r19, Z+ ; load next green byte\n" \
" ldi r27, 7 ; reload inner loop counter\n" \
" cbi %[port], %[pin] ; pin hi -> lo\n" \
" nop ; pulse timing delay\n" \
" nop\n" \
/* blue - loop over first 7 bits */ \
"10: sbi %[port], %[pin] ; pin lo -> hi\n" \
" sbrc r20, 7 ; test hi bit clear\n" \
" rjmp 11f ; true, skip pin hi -> lo\n" \
" cbi %[port], %[pin] ; false, pin hi -> lo\n" \
"11: sbrc r20, 7 ; equalise delay of both code paths\n" \
" rjmp 12f\n" \
"12: nop ; pulse timing delay\n" \
" nop\n" \
" nop\n" \
" nop\n" \
" nop\n" \
" nop\n" \
" lsl r20 ; shift to next bit\n" \
" dec r27 ; decrement inner loop counter\n" \
" cbi %[port], %[pin] ; pin hi -> lo\n" \
" brne 10b ; inner loop, if required\n" \
" nop ; equalise delay of both code paths\n" \
/* blue, 8th bit - output & handle outer loop */ \
" sbi %[port], %[pin] ; pin lo -> hi\n" \
" sbrc r20, 7 ; test hi bit clear\n" \
" rjmp 13f ; true, skip pin hi -> lo\n" \
" cbi %[port], %[pin] ; false, pin hi -> lo\n" \
"13: sbrc r20, 7 ; equalise delay of both code paths\n" \
" rjmp 14f\n" \
"14: nop ; pulse timing delay\n" \
" nop\n" \
" ldi r27, 8 ; reload inner loop counter\n" \
" sbiw %A[len], 1 ; decrement outer loop counter\n" \
" breq 15f ; exit outer loop if zero\n" \
" ld r20, Z+ ; load in next blue byte\n" \
" cbi %[port], %[pin] ; pin hi -> lo\n" \
" rjmp 2b ; outer loop, if required\n" \
"15: nop ; pulse timing delay\n" \
" cbi %[port], %[pin] ; pin hi -> lo\n" \
" nop ; pulse timing delay\n" \
" nop\n" \
" out __SREG__, r26 ; reenable interrupts\n" \
"16:\n" \
: \
: [rgb] "z" (RGB), \
[len] "w" (LEN), \
[port] "I" (_SFR_IO_ADDR(PORT)), \
[pin] "I" (PIN) \
: "r18", "r19", "r20", "r26", "r27", "cc", "memory" \
)
/*
* Define a C function to wrap the inline WS2811 macro for a given port and pin.
*/
#define DEFINE_WS2811_FN(NAME, PORT, PIN) \
extern void NAME(const RGB_t *rgb, uint16_t len) __attribute__((noinline)); \
void NAME(const RGB_t *rgb, uint16_t len) { WS2811(PORT, PIN, rgb, len); }
#endif /* WS2811_h */
/*
* Copyright 2012 Alan Burlison, alan@bleaklow.com. All rights reserved.
* Use is subject to license terms.
*
* Demo of the WS2811 driver, driving 3 pixels.
*/
#include <avr/io.h>
#include <util/delay.h>
#define BIT(B) (0x01 << (uint8_t)(B))
#define SET_BIT_HI(V, B) (V) |= (uint8_t)BIT(B)
#define SET_BIT_LO(V, B) (V) &= (uint8_t)~BIT(B)
#define PAUSE 1000 // msec
#define DELAY 10 // msec
// Define the output function, using pin 0 on port b.
DEFINE_WS2811_FN(WS2811RGB, PORTB, 0)
// Drive the three pixels in an infinit loop.
void threepixeldemo(void)
{
// Configure pin for output.
SET_BIT_HI(DDRB, 0);
SET_BIT_LO(PORTB, 0);
// off->red, off->green, off->blue
RGB_t rgb[3] = {{0,0,0},{0,0,0},{0,0,0}};
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(PAUSE);
for (int i = 0; i < 255; i++) {
rgb[0].r += 1;
rgb[1].g += 1;
rgb[2].b += 1;
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(DELAY);
}
// loop forever.
for (;;) {
// red->yellow, green->cyan, blue->magenta
for (int i = 0; i < 255; i++) {
rgb[0].g += 1;
rgb[1].b += 1;
rgb[2].r += 1;
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(DELAY);
}
// yellow->green, cyan->blue, magenta->white
for (int i = 0; i < 255; i++) {
rgb[0].r -= 1;
rgb[1].g -= 1;
rgb[2].g += 1;
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(DELAY);
}
// green->cyan, blue->magenta, white->off
for (int i = 0; i < 255; i++) {
rgb[0].b += 1;
rgb[1].r += 1;
rgb[2].r -= 1;
rgb[2].g -= 1;
rgb[2].b -= 1;
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(DELAY);
}
// cyan->blue, magenta->white, off->red
for (int i = 0; i < 255; i++) {
rgb[0].g -= 1;
rgb[1].g += 1;
rgb[2].r += 1;
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(DELAY);
}
// blue->magenta, white->off, red->yellow
for (int i = 0; i < 255; i++) {
rgb[0].r += 1;
rgb[1].r -= 1;
rgb[1].g -= 1;
rgb[1].b -= 1;
rgb[2].g += 1;
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(DELAY);
}
// magenta->white, off->red, yellow->green
for (int i = 0; i < 255; i++) {
rgb[0].g += 1;
rgb[1].r += 1;
rgb[2].r -= 1;
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(DELAY);
}
// white->off, red->yellow, green->cyan
for (int i = 0; i < 255; i++) {
rgb[0].r -= 1;
rgb[0].g -= 1;
rgb[0].b -= 1;
rgb[1].g += 1;
rgb[2].b += 1;
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(DELAY);
}
// off->red, yellow->green, cyan->blue
for (int i = 0; i < 255; i++) {
rgb[0].r += 1;
rgb[1].r -= 1;
rgb[2].g -= 1;
WS2811RGB(rgb, ARRAYLEN(rgb));
_delay_ms(DELAY);
}
}
}
答案 0 :(得分：1)
添加#include <stdint.h>以引入uint8_t。
答案 1 :(得分：0)
#ifndef WS2811_h
#define WS2811_h
/** missing an #endif here, (most likely) */
#include <avr/io.h>
#include <util/delay.h>
#include <WS2811.h>
缺少的endif导致错误进一步下降。
expected ':', ',', ';', '}' or '__attribute__' before 'r'
这种类型的错误通常是由一些早期错误引起的，通常是#includes。你错过了一个#endif，但是当文件包含不正确的时候也会发生这种情况。与任何宏观错误一样，它们很难追踪。