1 files changed, 14 insertions, 0 deletions
diff --git a/src/linux/gpio.h b/src/linux/gpio.h
index a2c92520..74d9db37 100644
--- a/src/linux/gpio.h
+++ b/src/linux/gpio.h
@@ -3,6 +3,13 @@
 
 #include <stdint.h> // uint8_t
 
+struct gpio_out {
+    uint32_t pin;
+};
+struct gpio_out gpio_out_setup(uint8_t pin, uint8_t val);
+void gpio_out_toggle(struct gpio_out g);
+void gpio_out_write(struct gpio_out g, uint8_t val);
+
 struct gpio_adc {
     int fd;
 };
@@ -11,4 +18,11 @@ uint32_t gpio_adc_sample(struct gpio_adc g);
 uint16_t gpio_adc_read(struct gpio_adc g);
 void gpio_adc_cancel_sample(struct gpio_adc g);
 
+struct spi_config {
+    int fd;
+};
+struct spi_config spi_setup(uint32_t bus, uint8_t mode, uint32_t rate);
+void spi_transfer(struct spi_config config, uint8_t receive_data
+                  , uint8_t len, uint8_t *data);
+
 #endif // gpio.h