I want to use the earlephilhower Pico software along with FastLED, but I get a strange build error which does not occur with the standard mbed framework.
Here is the mini sample program
#include <Arduino.h>
#define FASTLED_INTERNAL
#include <FastLED.h>
// How many leds in your strip?
#define NUM_LEDS 12
// For led chips like Neopixels, which have a data line, ground, and power, you just
// need to define DATA_PIN. For led chipsets that are SPI based (four wires - data, clock,
// ground, and power), like the LPD8806, define both DATA_PIN and CLOCK_PIN
#define PIN_RGB_0 17
#define PIN_RGB_1 18
// Define the array of leds
CRGB leds[NUM_LEDS] ={0};
void setup() {
FastLED.addLeds<WS2812B,PIN_RGB_0,GRB>(&leds[6],6);
FastLED.addLeds<WS2812B,PIN_RGB_1,GRB>(&leds[0],6);
}
void loop() {
while(1);
}
And here is what success looks like:
the platformio.ini
[env:pico]
platform = raspberrypi
board = pico
framework = arduino
lib_extra_dirs = ~/Documents/Arduino/libraries
After a depressing number of warnings that FastLED generates I get:
Linking .pio\build\pico\firmware.elf
Generating UF2 image
elf2uf2 ".pio\build\pico\firmware.elf" ".pio\build\pico\firmware.uf2"
Checking size .pio\build\pico\firmware.elf
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM: [== ] 15.2% (used 41104 bytes from 270336 bytes)
Flash: [ ] 0.2% (used 4238 bytes from 2097152 bytes)
Building .pio\build\pico\firmware.bin
=================================== [SUCCESS] Took 6.29 seconds =
Change to the earlephilhower version:
platformio.ini
[env:pico]
;platform = raspberrypi
platform = https://github.com/maxgerhardt/platform-raspberrypi.git
board = pico
framework = arduino
board_build.core = earlephilhower
lib_extra_dirs = ~/Documents/Arduino/libraries
And the tail end of the output
Compiling .pio\build\pico\FrameworkArduino\wiring_shift.cpp.o
C:\Users\Keith\AppData\Local\Temp\ccoCCFn5.s: Assembler messages:
C:\Users\Keith\AppData\Local\Temp\ccoCCFn5.s:396: Error: invalid offset, value too big (0x00000494)Archiving .pio\build\pico\lib9a4\libSPI.a
*** [.pio\build\pico\src\main.cpp.o] Error 1
Indexing .pio\build\pico\lib9a4\libSPI.a
=================================== [FAILED] Took 3.59 seconds
And a final clue: Removing the second call to FastLED.addLeds will cause a successful build.