YACWC

avr_code/spi.c

@@ -0,0 +1,26 @@
+
+#include "spi.h"
+
+
+
+void spi_rfm69_select(bool state)
+{
+    SET_PIN_OUT(DDRE, DDE2);
+    if (!state) {
+        SET_PIN_HIGH(PORTE, PE2);
+    } else {
+        SET_PIN_LOW(PORTE, PE2);
+    }
+}
+
+
+    uint8_t spi_write(uint8_t data) {
+        SPDR1 = data; // Load data into the SPI data register
+        while (!(SPSR1 & (1 << SPIF1))) {
+        }; // Wait for transmission to complete
+        return SPDR1; // Return received data
+    }
+
+    uint8_t spi_read() {
+        return spi_write(0xFF);
+    }