search

platformio / platform-espressif8266

Espressif 8266: development platform for PlatformIO
https://registry.platformio.org/platforms/platformio/espressif8266
Apache License 2.0
321 stars 218 forks source link

How to make platformio compile header file in the project first？ #262

Closed ethereal14 closed 2 years ago

ethereal14 commented 2 years ago

I want to use i2c on esp8266. First I copy the i2c_master.h and i2c_master.c into my project. I want use GPIO12 and GPIO14 as i2c_sda and i2c_scl . Then I change it is macro definition

original

#define I2C_MASTER_SDA_MUX PERIPHS_IO_MUX_GPIO2_U
#define I2C_MASTER_SCL_MUX PERIPHS_IO_MUX_MTMS_U
#define I2C_MASTER_SDA_GPIO 2
#define I2C_MASTER_SCL_GPIO 14
#define I2C_MASTER_SDA_FUNC FUNC_GPIO2
#define I2C_MASTER_SCL_FUNC FUNC_GPIO14

now

#define I2C_MASTER_SDA_MUX PERIPHS_IO_MUX_MTDI_U
#define I2C_MASTER_SCL_MUX PERIPHS_IO_MUX_MTMS_U
#define I2C_MASTER_SDA_GPIO 12
#define I2C_MASTER_SCL_GPIO 14
#define I2C_MASTER_SDA_FUNC FUNC_GPIO12
#define I2C_MASTER_SCL_FUNC FUNC_GPIO14

But when I compile this project and upload firmware to esp8266, it is i2c pin still original pin.

I know it is usesing i2c_master.h from the SDK,but I don't known how to solve this problem

valeros commented 2 years ago

Hi @ethereal14 ! This repository is not the right place to ask such generic questions. Next time please ask for help here https://community.platformio.org. In a nutshell, although I'm not sure what framework/library you're using, but based on your code snippet, you can try to redefine the I2C pins globally using the build_flags option.

ethereal14 commented 2 years ago

Thanks for your reply!@valeros , you gave me a good idea!🙏