save some flash by configuring each busio.SPI pin with a helper function

Author: Randall-Scharpf

ports/atmel-samd/common-hal/busio/SPI.c

@@ -21,13 +21,7 @@
 #include "samd/dma.h"
 #include "samd/sercom.h"
 
-void setup_pin(const mcu_pin_obj_t *pin, uint32_t pinmux) {
-    gpio_set_pin_direction(pin->number, GPIO_DIRECTION_OUT);
-    gpio_set_pin_pull_mode(pin->number, GPIO_PULL_OFF);
-    gpio_set_pin_function(pin->number, pinmux);
-    claim_pin(pin);
-    hri_port_set_PINCFG_DRVSTR_bit(PORT, (enum gpio_port)GPIO_PORT(pin->number), GPIO_PIN(pin->number));
-}
+void setup_pin(const mcu_pin_obj_t *pin, uint32_t pinmux);
 
 void common_hal_busio_spi_construct(busio_spi_obj_t *self,
     const mcu_pin_obj_t *clock, const mcu_pin_obj_t *mosi,
@@ -323,3 +317,11 @@ uint8_t common_hal_busio_spi_get_polarity(busio_spi_obj_t *self) {
     void *hw = self->spi_desc.dev.prvt;
     return hri_sercomspi_get_CTRLA_CPOL_bit(hw);
 }
+
+void setup_pin(const mcu_pin_obj_t *pin, uint32_t pinmux) {
+    gpio_set_pin_direction(pin->number, GPIO_DIRECTION_OUT);
+    gpio_set_pin_pull_mode(pin->number, GPIO_PULL_OFF);
+    gpio_set_pin_function(pin->number, pinmux);
+    claim_pin(pin);
+    hri_port_set_PINCFG_DRVSTR_bit(PORT, (enum gpio_port)GPIO_PORT(pin->number), GPIO_PIN(pin->number));
+}