Ok, another noob question....I can use the following line of code in the main.c with no issues#define Green_LED_OFF HAL_GPIO_WritePin(GPIOA, GPIO_PIN_8, GPIO_PIN_RESET); // Green offBut when I want to use it in another .c file such as foo.c I get th...

Proper use of the HAL library for SPI communications.OK, first, I am very new to this and I am slowly learning as I go.The project I am working on is a radio beacon in the 430MHz range. I have a Nucleo-F446RE board and a RFM23B transceiver module. I ...