extmod/machine_spi: Provide reusable software SPI class.

So long as a port defines relevant mp_hal_pin_xxx functions (and delay) it
can make use of this software SPI class without the need for additional
code.

1 files changed, 7 insertions, 0 deletions

diff --git a/extmod/machine_spi.h b/extmod/machine_spi.h
index 62f42a8851..88a3e19f41 100644
--- a/extmod/machine_spi.h
+++ b/extmod/machine_spi.h
@@ -32,6 +32,8 @@
 
 // SPI protocol
 typedef struct _mp_machine_spi_p_t {
+    void (*init)(mp_obj_base_t *obj, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args);
+    void (*deinit)(mp_obj_base_t *obj); // can be NULL
     void (*transfer)(mp_obj_base_t *obj, size_t len, const uint8_t *src, uint8_t *dest);
 } mp_machine_spi_p_t;
 
@@ -45,8 +47,13 @@ typedef struct _mp_machine_soft_spi_obj_t {
     mp_hal_pin_obj_t miso;
 } mp_machine_soft_spi_obj_t;
 
+extern const mp_obj_type_t mp_machine_soft_spi_type;
+extern const mp_obj_dict_t mp_machine_spi_locals_dict;
+
 void mp_machine_soft_spi_transfer(mp_obj_base_t *self, size_t len, const uint8_t *src, uint8_t *dest);
 
+mp_obj_t mp_machine_spi_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args);
+
 MP_DECLARE_CONST_FUN_OBJ_VAR_BETWEEN(mp_machine_spi_read_obj);
 MP_DECLARE_CONST_FUN_OBJ_VAR_BETWEEN(mp_machine_spi_readinto_obj);
 MP_DECLARE_CONST_FUN_OBJ_2(mp_machine_spi_write_obj);