Implement audiobusio and enhance PIO for it

This adds I2SOut and PDMIn support via PIO.

StateMachines can now:
 * read and read while writing
 * transfer in 1, 2 or 4 byte increments
 * init pins based on expected defaults automatically
 * be stopped and restarted
 * rxfifo can be cleared and rxstalls detected (good for tracking when
   the reading code isn't keeping up)

Fixes #4162

1 files changed, 20 insertions, 18 deletions

diff --git a/ports/raspberrypi/bindings/rp2pio/StateMachine.h b/ports/raspberrypi/bindings/rp2pio/StateMachine.h
index 5ff20a75b..36e44f191 100644
--- a/ports/raspberrypi/bindings/rp2pio/StateMachine.h
+++ b/ports/raspberrypi/bindings/rp2pio/StateMachine.h
@@ -36,36 +36,38 @@
 extern const mp_obj_type_t rp2pio_statemachine_type;
 
 // Construct an underlying SPI object.
-extern void common_hal_rp2pio_statemachine_construct(rp2pio_statemachine_obj_t *self,
+void common_hal_rp2pio_statemachine_construct(rp2pio_statemachine_obj_t *self,
     const uint16_t* program, size_t program_len,
     size_t frequency,
     const uint16_t* init, size_t init_len,
-    const mcu_pin_obj_t * first_out_pin, uint8_t out_pin_count,
+    const mcu_pin_obj_t * first_out_pin, uint8_t out_pin_count, uint32_t initial_out_pin_state, uint32_t initial_out_pin_direction,
     const mcu_pin_obj_t * first_in_pin, uint8_t in_pin_count,
-    const mcu_pin_obj_t * first_set_pin, uint8_t set_pin_count,
-    const mcu_pin_obj_t * first_sideset_pin, uint8_t sideset_pin_count,
+    const mcu_pin_obj_t * first_set_pin, uint8_t set_pin_count, uint32_t initial_set_pin_state, uint32_t initial_set_pin_direction,
+    const mcu_pin_obj_t * first_sideset_pin, uint8_t sideset_pin_count, uint32_t initial_sideset_pin_state, uint32_t initial_sideset_pin_direction,
     bool exclusive_pin_use,
     bool auto_pull, uint8_t pull_threshold, bool out_shift_right,
+    bool wait_for_txstall,
     bool auto_push, uint8_t push_threshold, bool in_shift_right);
 
-extern void common_hal_rp2pio_statemachine_deinit(rp2pio_statemachine_obj_t *self);
-extern bool common_hal_rp2pio_statemachine_deinited(rp2pio_statemachine_obj_t *self);
+void common_hal_rp2pio_statemachine_deinit(rp2pio_statemachine_obj_t *self);
+bool common_hal_rp2pio_statemachine_deinited(rp2pio_statemachine_obj_t *self);
 
-// Writes out the given data.
-extern bool common_hal_rp2pio_statemachine_write(rp2pio_statemachine_obj_t *self, const uint8_t *data, size_t len);
-
-// // Reads in len bytes while outputting zeroes.
-// extern bool common_hal_rp2pio_statemachine_read(rp2pio_statemachine_obj_t *self, uint8_t *data, size_t len, uint8_t write_value);
+void common_hal_rp2pio_statemachine_restart(rp2pio_statemachine_obj_t *self);
+void common_hal_rp2pio_statemachine_stop(rp2pio_statemachine_obj_t *self);
+void common_hal_rp2pio_statemachine_run(rp2pio_statemachine_obj_t *self, const uint16_t *instructions, size_t len);
 
-// // Reads and write len bytes simultaneously.
-// extern bool common_hal_rp2pio_statemachine_transfer(rp2pio_statemachine_obj_t *self,
-//                                           const uint8_t *data_out, size_t out_len,
-//                                           uint8_t *data_in, size_t in_len);
+// Writes out the given data.
+bool common_hal_rp2pio_statemachine_write(rp2pio_statemachine_obj_t *self, const uint8_t *data, size_t len, uint8_t stride_in_bytes);
+bool common_hal_rp2pio_statemachine_readinto(rp2pio_statemachine_obj_t *self, uint8_t *data, size_t len, uint8_t stride_in_bytes);
+bool common_hal_rp2pio_statemachine_write_readinto(rp2pio_statemachine_obj_t *self,
+                                                   const uint8_t *data_out, size_t out_len, uint8_t out_stride_in_bytes,
+                                                   uint8_t *data_in, size_t in_len, uint8_t in_stride_in_bytes);
 
-// Return actual SPI bus frequency.
+// Return actual state machine frequency.
 uint32_t common_hal_rp2pio_statemachine_get_frequency(rp2pio_statemachine_obj_t* self);
+void common_hal_rp2pio_statemachine_set_frequency(rp2pio_statemachine_obj_t* self, uint32_t frequency);
 
-// This is used by the supervisor to claim SPI devices indefinitely.
-// extern void common_hal_rp2pio_statemachine_never_reset(rp2pio_statemachine_obj_t *self);
+bool common_hal_rp2pio_statemachine_get_rxstall(rp2pio_statemachine_obj_t* self);
+void common_hal_rp2pio_statemachine_clear_rxfifo(rp2pio_statemachine_obj_t *self);
 
 #endif // MICROPY_INCLUDED_RASPBERRYPI_BINDINGS_RP2PIO_STATEMACHINE_H