1 files changed, 32 insertions, 0 deletions
diff --git a/ports/stm32/boards/stm32f4xx_prefix.c b/ports/stm32/boards/stm32f4xx_prefix.c
new file mode 100644
index 000000000..f4ffdab68
--- /dev/null
+++ b/ports/stm32/boards/stm32f4xx_prefix.c
@@ -0,0 +1,32 @@
+// stm32f4xx_prefix.c becomes the initial portion of the generated pins file.
+
+#include <stdio.h>
+
+#include "py/obj.h"
+#include "py/mphal.h"
+#include "pin.h"
+
+#define AF(af_idx, af_fn, af_unit, af_type, af_ptr) \
+{ \
+    { &pin_af_type }, \
+    .name = MP_QSTR_AF ## af_idx ## _ ## af_fn ## af_unit, \
+    .idx = (af_idx), \
+    .fn = AF_FN_ ## af_fn, \
+    .unit = (af_unit), \
+    .type = AF_PIN_TYPE_ ## af_fn ## _ ## af_type, \
+    .af_fn = (af_ptr) \
+}
+
+#define PIN(p_port, p_pin, p_af, p_adc_num, p_adc_channel) \
+{ \
+    { &pin_type }, \
+    .name = MP_QSTR_ ## p_port ## p_pin, \
+    .port = PORT_ ## p_port, \
+    .pin = (p_pin), \
+    .num_af = (sizeof(p_af) / sizeof(pin_af_obj_t)), \
+    .pin_mask = (1 << ((p_pin) & 0x0f)), \
+    .gpio = GPIO ## p_port, \
+    .af = p_af, \
+    .adc_num = p_adc_num, \
+    .adc_channel = p_adc_channel, \
+}