Beginners • Compiling error for RP2040

I'm working on integrating an OLED display and joystick with a TinyUSB example (cdc_msc) on the RP2040 (Raspberry Pi Pico). The original TinyUSB example compiled fine, but after adding the OLED code, I keep running into an error with this line:

#define I2C_INSTANCE i2c0
if i define it, I get

/home/santii/pico/tinyusb/examples/device/cdc_msc/src/hello_oled.c:7: error: "I2C_INSTANCE" redefined [-Werror]

7 | #define I2C_INSTANCE i2c0

|

compilation terminated due to -Wfatal-errors.

cc1: all warnings being treated as errors

make[2]: *** [CMakeFiles/cdc_msc.dir/build.make:118: CMakeFiles/cdc_msc.dir/src/hello_oled.c.o] Error 1

make[1]: *** [CMakeFiles/Makefile2 CMakeFiles/cdc_msc.dir/all] Error 2

make: *** [Makefile:91: all] Error 2

Then I tried to put it as

#ifndef I2C_INSTANCE
#define I2C_INSTANCE i2c0
#endif
error: 'I2C_INSTANCE' undeclared (first use in this function) 22 | i2c_init(I2C_INSTANCE, 400000); | ^~~~~~~~~~~~

Am i just not understanding the error?

Statistics: Posted by Frambuesa6274 — Fri Feb 28, 2025 9:36 pm — Replies 0 — Views 10

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