pio.h
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1 /*
2  * SPDX-FileCopyrightText: 2021 Otto-von-Guericke-Universität Magdeburg
3  * SPDX-License-Identifier: LGPL-2.1-only
4  */
5 
6 #pragma once
7 
18 #include "periph_conf.h"
19 #include "periph/gpio.h"
20 #include "periph/pio.h"
21 
22 #ifdef __cplusplus
23 extern "C" {
24 #endif
25 
26 #if defined(CPU_MODEL_RP2040) || defined(DOXYGEN)
30 #define PIO_SM_NUMOF 4
31 
35 #define PIO_INSTR_NUMOF 32
36 
40 #define PIO_IRQ_NUMOF 8
41 #endif
42 
46 typedef uint16_t pio_instr_t;
47 
53 #define PIO_GPIO_INIT_HIGH(pin) (((gpio_t)(1)) << (pin))
54 
60 #define PIO_GPIO_INIT_LOW(pin) ((gpio_t)0)
61 
67 #define PIO_GPIO_INIT_OUT(pin) (((gpio_t)(1)) << (pin))
68 
74 #define PIO_GPIO_INIT_IN(pin) ((gpio_t)0)
75 
79 typedef struct {
82  gpio_t gpio_state;
83  gpio_t gpio_direction;
84  gpio_t gpio_base;
85  unsigned gpio_count;
87 
95 #define PIO_INST_JMP (0u << 13)
99 #define PIO_INST_JMP_MASK (7u << 13)
103 #define PIO_INST_JMP_CONDITION_SHIFT 5
107 #define PIO_INST_JMP_CONDITION_MASK (7u << PIO_INST_JMP_CONDITION_SHIFT)
111 #define PIO_INST_JMP_ADDRESS_MASK (31u)
115 typedef enum {
128 #define PIO_INST_WAIT (1u << 13)
132 #define PIO_INST_WAIT_MASK (7u << 13)
136 #define PIO_INST_WAIT_POL_SHIFT 7
140 #define PIO_INST_WAIT_POL_MASK (1u << PIO_INST_WAIT_POL_SHIFT)
144 #define PIO_INST_WAIT_SOURCE_SHIFT 5
148 #define PIO_INST_WAIT_SOURCE_MASK (3u << PIO_INST_WAIT_SOURCE_SHIFT)
152 #define PIO_INST_WAIT_INDEX_MASK (31u)
156 typedef enum {
163 typedef enum {
171 #define PIO_INST_IN (2u << 13)
175 #define PIO_INST_IN_MASK (7u << 13)
179 #define PIO_INST_IN_SOURCE_SHIFT 5
183 #define PIO_INST_IN_SOURCE_MASK (7u << PIO_INST_IN_SOURCE_SHIFT)
187 #define PIO_INST_IN_BIT_COUNT_MASK (31u)
191 typedef enum {
202 #define PIO_INST_OUT (3u << 13)
206 #define PIO_INST_OUT_MASK (7u << 13)
210 #define PIO_INST_OUT_DESTINATION_SHIFT 5
214 #define PIO_INST_OUT_DESTINATION_MASK (7u << PIO_INST_OUT_DESTINATION_SHIFT)
218 #define PIO_INST_OUT_BIT_COUNT_MASK (31u)
222 typedef enum {
235 #define PIO_INST_PUSH (4u << 13)
239 #define PIO_INST_PUSH_MASK ((7u << 13) | (1u << 7) | 31u)
243 #define PIO_INST_PUSH_IF_FULL_SHIFT 6
247 #define PIO_INST_PUSH_IF_FULL_MASK (1u << PIO_INST_PUSH_IF_FULL_SHIFT)
251 #define PIO_INST_PUSH_BLOCK_SHIFT 5
255 #define PIO_INST_PUSH_BLOCK_MASK (1u << PIO_INST_PUSH_BLOCK_SHIFT)
259 #define PIO_INST_PULL ((4u << 13) | (1u << 7))
263 #define PIO_INST_PULL_MASK ((7u << 13) | (1u << 7) | 31u)
267 #define PIO_INST_PULL_IF_EMPTY_SHIFT 6
271 #define PIO_INST_PULL_IF_EMPTY_MASK (1u << PIO_INST_PULL_IF_EMPTY_SHIFT)
275 #define PIO_INST_PULL_BLOCK_SHIFT 5
279 #define PIO_INST_PULL_BLOCK_MASK (1u << PIO_INST_PULL_BLOCK_SHIFT)
283 #define PIO_INST_MOV (5u << 13)
287 #define PIO_INST_MOV_MASK (7u << 13)
291 #define PIO_INST_MOV_DESTINATION_SHIFT 5
295 #define PIO_INST_MOV_DESTINATION_MASK (7u << PIO_INST_MOV_DESTINATION_SHIFT)
299 #define PIO_INST_MOV_OP_SHIFT 3
303 #define PIO_INST_MOV_OP_MASK (3u << PIO_INST_MOV_OP_SHIFT)
307 #define PIO_INST_MOV_SOURCE_SHIFT 0
311 #define PIO_INST_MOV_SOURCE_MASK (7u)
315 typedef enum {
327 typedef enum {
335 typedef enum {
347 #define PIO_INST_IRQ (6u << 13)
351 #define PIO_INST_IRQ_MASK ((7u << 13) | (1u << 7))
355 #define PIO_INST_IRQ_CLR_SHIFT 6
359 #define PIO_INST_IRQ_CLR_MASK (1u << PIO_INST_IRQ_CLR_SHIFT)
363 #define PIO_INST_IRQ_WAIT_SHIFT 5
367 #define PIO_INST_IRQ_WAIT_MASK (1u << PIO_INST_IRQ_WAIT_SHIFT)
371 #define PIO_INST_IRQ_INDEX_MASK (31u)
375 #define PIO_INST_SET (7u << 13)
379 #define PIO_INST_SET_MASK (7u << 13)
383 #define PIO_INST_SET_DESTINATION_SHIFT 5
387 #define PIO_INST_SET_DESTINATION_MASK (7u << PIO_INST_SET_DESTINATION_SHIFT)
391 #define PIO_INST_SET_DATA_MASK (31u)
395 typedef enum {
401 
411  unsigned address)
412 {
413  return PIO_INST_JMP |
414  (((unsigned)condition) << PIO_INST_JMP_CONDITION_SHIFT) |
415  address;
416 }
428  pio_inst_wait_src_t source,
429  bool relative,
430  unsigned index)
431 {
432  return PIO_INST_WAIT |
433  ((unsigned)polarity << PIO_INST_WAIT_POL_SHIFT) |
434  ((unsigned)source << PIO_INST_WAIT_SOURCE_SHIFT) |
435  ((!!relative) << 4) | index;
436 }
446  unsigned bit_count)
447 {
448  return PIO_INST_IN |
449  ((unsigned)source << PIO_INST_IN_SOURCE_SHIFT) |
450  (bit_count % 32);
451 }
460 static inline pio_instr_t pio_inst_out(pio_inst_out_dst_t destination,
461  unsigned bit_count)
462 {
463  return PIO_INST_OUT |
464  ((unsigned)destination << PIO_INST_OUT_DESTINATION_SHIFT) |
465  (bit_count % 32);
466 }
475 static inline pio_instr_t pio_inst_push(bool if_full,
476  bool block)
477 {
478  return PIO_INST_PUSH |
479  ((!!if_full) << PIO_INST_PUSH_IF_FULL_SHIFT) |
480  ((!!block) << PIO_INST_PUSH_BLOCK_SHIFT);
481 }
490 static inline pio_instr_t pio_inst_pull(bool if_empty,
491  bool block)
492 {
493  return PIO_INST_PULL |
494  ((!!if_empty) << PIO_INST_PULL_IF_EMPTY_SHIFT) |
495  ((!!block) << PIO_INST_PULL_BLOCK_SHIFT);
496 }
506 static inline pio_instr_t pio_inst_mov(pio_inst_mov_dst_t destination,
507  pio_inst_mov_op_t operation,
508  pio_inst_mov_src_t source)
509 {
510  return PIO_INST_MOV |
511  ((unsigned)destination << PIO_INST_MOV_DESTINATION_SHIFT) |
512  ((unsigned)operation << PIO_INST_MOV_OP_SHIFT) |
513  ((unsigned)source << PIO_INST_MOV_SOURCE_SHIFT);
514 }
525 static inline pio_instr_t pio_inst_irq(bool clear,
526  bool wait,
527  bool relative,
528  unsigned index)
529 {
530  return PIO_INST_IRQ |
531  (!!clear << PIO_INST_IRQ_CLR_SHIFT) |
532  (!!wait << PIO_INST_IRQ_WAIT_SHIFT) |
533  ((!!relative << 4) | index);
534 }
543 static inline pio_instr_t pio_inst_set(pio_inst_set_dst_t destination,
544  unsigned data)
545 {
546  return PIO_INST_SET |
547  ((unsigned)destination << PIO_INST_SET_DESTINATION_SHIFT) |
548  data;
549 }
550 
561 static inline pio_instr_t pio_inst_delay_sideset(unsigned sideset,
562  unsigned sideset_count,
563  bool sideset_opt,
564  unsigned delay)
565 {
566  return ((!!sideset_opt) << 12) |
567  (sideset << (13 - (!!sideset_opt + sideset_count))) |
568  (delay << 8);
569 }
575 typedef struct pio_sm_ctrl_regs {
576  volatile uint32_t clkdiv;
577  volatile uint32_t execctrl;
578  volatile uint32_t shiftctrl;
579  const volatile uint32_t addr;
580  volatile uint32_t instr;
581  volatile uint32_t pinctrl;
583 
587 #define PIO_SM_CTRL_BASE(dev) ((pio_sm_ctrl_regs_t *)(&((dev)->SM0_CLKDIV)))
588 
592 #define PIO_SM_CLKDIV_MAX 65536
593 
597 #define PIO_SM_MASK(sm) (1u << (sm))
598 
602 #define PIO_IRQ_MASK(irq) (1u << (irq))
603 
636 static inline unsigned pio_irq_rel_index(unsigned irq_abs, unsigned sm) {
637  assert(irq_abs < PIO_IRQ_NUMOF);
638  assert(sm < PIO_SM_NUMOF);
639  return (irq_abs & 0b100u) | ((irq_abs + sm) & 0b011u);
640 }
641 
652 static inline unsigned pio_irq_rel_sm(unsigned irq_abs, unsigned irq_rel) {
653  assert(irq_abs < PIO_IRQ_NUMOF);
654  assert(irq_rel < PIO_IRQ_NUMOF);
655  return (irq_abs & 0b100u) | ((irq_rel - irq_abs) & 0b011u);
656 }
657 
661 #define PIO_IRQ_REL_MASK(irq, sm) PIO_IRQ_MASK(pio_irq_rel_index(irq, sm))
662 
666 typedef enum {
667  /* lower 4 hardware IRQs which are issued with 'irq <0-3> [rel]' and are routed to NVIC */
668  /* This does not encode the state machine index of which state machine fired! */
669  PIO_IRQ_SM_3 = PIO0_INTR_SM3_Msk,
670  PIO_IRQ_SM_2 = PIO0_INTR_SM2_Msk,
671  PIO_IRQ_SM_1 = PIO0_INTR_SM1_Msk,
672  PIO_IRQ_SM_0 = PIO0_INTR_SM0_Msk,
673  /* FIFO interrupts per state machine */
674  PIO_IRQ_TXNFULL_SM3 = PIO0_INTR_SM3_TXNFULL_Msk,
675  PIO_IRQ_TXNFULL_SM2 = PIO0_INTR_SM2_TXNFULL_Msk,
676  PIO_IRQ_TXNFULL_SM1 = PIO0_INTR_SM1_TXNFULL_Msk,
677  PIO_IRQ_TXNFULL_SM0 = PIO0_INTR_SM0_TXNFULL_Msk,
678  PIO_IRQ_RXNEMPTY_SM3 = PIO0_INTR_SM3_RXNEMPTY_Msk,
679  PIO_IRQ_RXNEMPTY_SM2 = PIO0_INTR_SM2_RXNEMPTY_Msk,
680  PIO_IRQ_RXNEMPTY_SM1 = PIO0_INTR_SM1_RXNEMPTY_Msk,
681  PIO_IRQ_RXNEMPTY_SM0 = PIO0_INTR_SM0_RXNEMPTY_Msk,
682  /* all routed state machine interrupts */
684  PIO_IRQ_SM_2 |
685  PIO_IRQ_SM_1 |
687  /* all interrupts */
698 
702 typedef enum {
707 
711 typedef enum {
716  PIO_SM_ALL = (PIO_SM0 | PIO_SM1 |
717  PIO_SM2 | PIO_SM3)
719 
723 typedef struct pio_isr_vec {
730  void (*tx_ready)(pio_t pio, pio_sm_t sm);
737  void (*rx_ready)(pio_t pio, pio_sm_t sm);
739 
743 typedef struct pio_isr_sm_vec {
750  void (*sm)(pio_t pio, unsigned irq);
752 
756 typedef struct pio_program_conf {
757  unsigned pc_start;
758  unsigned wrap_bottom;
759  unsigned wrap_top;
760  unsigned sideset_count;
764 
768 typedef struct pio_sm_clkdiv {
769  uint16_t div;
770  uint8_t frac_100;
772 
788 
801 
812  int pio_write_program(pio_t pio, pio_program_t *prog, const pio_instr_t *instr);
813 
821 
829 
837 void pio_set_isr_vec(pio_t pio, pio_sm_t sm, const pio_isr_vec_t *vec);
838 
846 void pio_set_isr_sm_vec(pio_t pio, unsigned irq, const pio_isr_sm_vec_t *vec);
847 
859 void pio_sm_set_out_pins(pio_t pio, pio_sm_t sm, gpio_t pin_base, unsigned pin_count);
860 
870 void pio_sm_set_in_pins(pio_t pio, pio_sm_t sm, gpio_t pin_base);
871 
883 void pio_sm_set_set_pins(pio_t pio, pio_sm_t sm, gpio_t pin_base, unsigned pin_count);
884 
893 void pio_sm_set_sideset_pins(pio_t pio, pio_sm_t sm, gpio_t pin_base);
894 
907 void pio_sm_set_sideset_count(pio_t pio, pio_sm_t sm, unsigned pin_count, bool enable);
908 
916 void pio_sm_set_sideset_target(pio_t pio, pio_sm_t sm, bool pindir);
917 
929 
943 
953 void pio_sm_clkdiv_restart(pio_t pio, unsigned sm_mask);
954 
964 void pio_sm_set_wrap(pio_t pio, pio_sm_t sm, unsigned prog_loc, uint8_t top, uint8_t bottom);
965 
975 void pio_sm_set_jmp_pin(pio_t pio, pio_sm_t sm, gpio_t pin);
976 
986 void pio_sm_set_in_shift(pio_t pio, pio_sm_t sm, bool right, bool autopush, unsigned threshold);
987 
997 void pio_sm_set_out_shift(pio_t pio, pio_sm_t sm, bool right, bool autopull, unsigned threshold);
998 
1006 
1014 
1022 
1030 
1039 
1048 
1062 int pio_sm_transmit_word(pio_t pio, pio_sm_t sm, uint32_t word);
1063 
1073 void pio_sm_transmit_word_block(pio_t pio, pio_sm_t sm, uint32_t word);
1074 
1085 void pio_sm_transmit_words_block(pio_t pio, pio_sm_t sm, const uint32_t *words, unsigned count);
1086 
1100 int pio_sm_receive_word(pio_t pio, pio_sm_t sm, uint32_t *word);
1101 
1111 void pio_sm_receive_word_block(pio_t pio, pio_sm_t sm, uint32_t *word);
1112 
1123 void pio_sm_receive_words_block(pio_t pio, pio_sm_t sm, uint32_t *words, unsigned count);
1124 
1132 uint32_t pio_irq_get(pio_t pio);
1133 
1140 void pio_irq_clear(pio_t pio, unsigned irq_flags);
1141 
1157  const pio_program_conf_t *conf);
1158 
1169 void pio_sm_set_pindirs_with_mask(pio_t pio, pio_sm_t sm, gpio_t values, gpio_t mask);
1170 
1181 void pio_sm_set_pins_with_mask(pio_t pio, pio_sm_t sm, gpio_t values, gpio_t mask);
1182 
1192 
1202 
1212 
1219 
1226 
1233 static inline void pio_sm_clear_debug_txstall(pio_t pio, unsigned sm_mask)
1234 {
1235  io_reg_atomic_set(&pio_config[pio].dev->FDEBUG,
1236  ((sm_mask & PIO_SM_ALL) << PIO0_FDEBUG_TXSTALL_Pos));
1237 }
1238 
1245 static inline void pio_sm_clear_debug_txover(pio_t pio, unsigned sm_mask)
1246 {
1247  io_reg_atomic_set(&pio_config[pio].dev->FDEBUG,
1248  ((sm_mask & PIO_SM_ALL) << PIO0_FDEBUG_TXOVER_Pos));
1249 }
1250 
1257 static inline void pio_sm_clear_debug_rxunder(pio_t pio, unsigned sm_mask)
1258 {
1259  io_reg_atomic_set(&pio_config[pio].dev->FDEBUG,
1260  ((sm_mask & PIO_SM_ALL) << PIO0_FDEBUG_RXUNDER_Pos));
1261 }
1262 
1269 static inline void pio_sm_clear_debug_rxstall(pio_t pio, unsigned sm_mask)
1270 {
1271  io_reg_atomic_set(&pio_config[pio].dev->FDEBUG,
1272  ((sm_mask & PIO_SM_ALL) << PIO0_FDEBUG_RXSTALL_Pos));
1273 }
1274 
1283 static inline bool pio_sm_tx_fifo_empty(pio_t pio, pio_sm_t sm)
1284 {
1285  return !!(pio_config[pio].dev->FSTAT & ((1u << sm) << PIO0_FSTAT_TXEMPTY_Pos));
1286 }
1287 
1296 static inline bool pio_sm_tx_fifo_full(pio_t pio, pio_sm_t sm)
1297 {
1298  return !!(pio_config[pio].dev->FSTAT & ((1u << sm) << PIO0_FSTAT_TXFULL_Pos));
1299 }
1300 
1309 static inline bool pio_sm_rx_fifo_empty(pio_t pio, pio_sm_t sm)
1310 {
1311  return !!(pio_config[pio].dev->FSTAT & ((1u << sm) << PIO0_FSTAT_RXEMPTY_Pos));
1312 }
1313 
1322 static inline bool pio_sm_rx_fifo_full(pio_t pio, pio_sm_t sm)
1323 {
1324  return !!((pio_config[pio].dev)->FSTAT & ((1u << sm) << PIO0_FSTAT_RXFULL_Pos));
1325 }
1326 
1327 #ifdef __cplusplus
1328 }
1329 #endif
1330 
#define assert(cond)
abort the program if assertion is false
Definition: assert.h:146
static const pio_conf_t pio_config[]
Array of PIO configurations.
Definition: periph_conf.h:137
static unsigned pio_irq_rel_index(unsigned irq_abs, unsigned sm)
Convert absolute IRQ index to relative IRQ index.
Definition: pio.h:636
uint16_t pio_instr_t
Type to represent the width of an instruction.
Definition: pio.h:46
static pio_instr_t pio_inst_jmp(pio_inst_jmp_cond_t condition, unsigned address)
Construct a JMP instruction.
Definition: pio.h:410
void pio_sm_clear_fifos(pio_t pio, pio_sm_t sm)
Drop all pending words in the tx and rx FIFO.
static void pio_sm_clear_debug_txover(pio_t pio, unsigned sm_mask)
Clear TX overflow debug flag.
Definition: pio.h:1245
pio_inst_jmp_cond_t
JMP conditions.
Definition: pio.h:115
@ PIO_INST_JMP_COND_NOT_X_EQ_Y
If scratch X != scratch Y.
Definition: pio.h:121
@ PIO_INST_JMP_COND_NONE
Unconditionally.
Definition: pio.h:116
@ PIO_INST_JMP_COND_PIN
If jump pin is high.
Definition: pio.h:122
@ PIO_INST_JMP_COND_X_DEC
If scratch X– is not 0.
Definition: pio.h:118
@ PIO_INST_JMP_COND_X_ZERO
If scratch X is 0.
Definition: pio.h:117
@ PIO_INST_JMP_COND_Y_ZERO
If scratch Y is 0.
Definition: pio.h:119
@ PIO_INST_JMP_COND_Y_DEC
If scratch Y– is not 0.
Definition: pio.h:120
@ PIO_INST_JMP_COND_NOT_OSR_EMPTY
If OSR is not empty.
Definition: pio.h:123
struct pio_sm_ctrl_regs pio_sm_ctrl_regs_t
Internal state machine registers.
void pio_sm_set_sideset_pins_init(pio_t pio, pio_sm_t sm, const pio_gpio_init_t *pin_init)
Set pins affected by sideset instructions and initialize the pins as PIO pins and a state according t...
void pio_sm_set_sideset_count(pio_t pio, pio_sm_t sm, unsigned pin_count, bool enable)
Configure how many pins are sideset pins and whether a sideset is optional or required for every inst...
#define PIO_SM_NUMOF
Number of state machines per PIO.
Definition: pio.h:30
pio_inst_out_dst_t
OUT destinations.
Definition: pio.h:222
@ PIO_INST_OUT_DST_PINS
To output pins.
Definition: pio.h:223
@ PIO_INST_OUT_DST_NULL
Discard data.
Definition: pio.h:226
@ PIO_INST_OUT_DST_PC
To program counter.
Definition: pio.h:228
@ PIO_INST_OUT_DST_PINDIRS
To output pin directions.
Definition: pio.h:227
@ PIO_INST_OUT_DST_Y
To scratch Y.
Definition: pio.h:225
@ PIO_INST_OUT_DST_X
To scratch X.
Definition: pio.h:224
@ PIO_INST_OUT_DST_ISR
To input shift register.
Definition: pio.h:229
@ PIO_INST_OUT_DST_EXEC
Execute as instruction.
Definition: pio.h:230
void pio_sm_set_out_pins(pio_t pio, pio_sm_t sm, gpio_t pin_base, unsigned pin_count)
Configure which pins are writeable by an 'out pins' instruction.
#define PIO_INST_JMP_CONDITION_SHIFT
JMP condition shift position.
Definition: pio.h:103
static pio_instr_t pio_inst_push(bool if_full, bool block)
Construct a PUSH instruction.
Definition: pio.h:475
void pio_print_debug(pio_t pio)
Print debug information about the current state of this PIO.
void pio_irq_disable(pio_t pio, pio_irq_line_t irq, pio_irq_source_t irq_mask)
Disable PIO<pio>_IRQ<irq> interrupts.
#define PIO_INST_PULL
PULL opcode.
Definition: pio.h:259
struct pio_isr_vec pio_isr_vec_t
PIO interrupt callbacks for FIFO interrupts.
#define PIO_INST_PUSH_IF_FULL_SHIFT
PUSH if input shift register is full shift position.
Definition: pio.h:243
void pio_sm_set_in_shift(pio_t pio, pio_sm_t sm, bool right, bool autopush, unsigned threshold)
Configure the shift in behaviour of a state machine.
void pio_set_isr_vec(pio_t pio, pio_sm_t sm, const pio_isr_vec_t *vec)
Set ISR callbacks for FIFO interrupts per state machine.
#define PIO_INST_PULL_IF_EMPTY_SHIFT
PULL if output shift register is empty flag shift position.
Definition: pio.h:267
#define PIO_INST_JMP
JMP opcode.
Definition: pio.h:95
#define PIO_INST_SET_DESTINATION_SHIFT
SET destination shift position.
Definition: pio.h:383
#define PIO_INST_IRQ
IRQ opcode.
Definition: pio.h:347
void pio_sm_set_wrap(pio_t pio, pio_sm_t sm, unsigned prog_loc, uint8_t top, uint8_t bottom)
Set program instruction wrap boundaries.
static unsigned pio_irq_rel_sm(unsigned irq_abs, unsigned irq_rel)
Get state machine index from relative IRQ index.
Definition: pio.h:652
#define PIO_INST_MOV_OP_SHIFT
MOV operation shift position.
Definition: pio.h:299
static pio_instr_t pio_inst_delay_sideset(unsigned sideset, unsigned sideset_count, bool sideset_opt, unsigned delay)
Encode the delay/sideset instruction field.
Definition: pio.h:561
void pio_sm_set_pins_with_mask(pio_t pio, pio_sm_t sm, gpio_t values, gpio_t mask)
Apply pin values in values for which the corresponding bit in mask is set.
uint32_t pio_irq_get(pio_t pio)
Read interrupt flags.
struct pio_sm_clkdiv pio_sm_clkdiv_t
PIO clock configuration.
pio_inst_mov_src_t
MOV source.
Definition: pio.h:335
@ PIO_INST_MOV_SRC_NULL
Fill with zeros.
Definition: pio.h:339
@ PIO_INST_MOV_SRC_X
From scratch X.
Definition: pio.h:337
@ PIO_INST_MOV_SRC_STATUS
From status.
Definition: pio.h:340
@ PIO_INST_MOV_SRC_Y
From scratch Y.
Definition: pio.h:338
@ PIO_INST_MOV_SRC_OSR
From output shift register.
Definition: pio.h:342
@ PIO_INST_MOV_SRC_ISR
From input shift register.
Definition: pio.h:341
@ PIO_INST_MOV_SRC_PINS
From input pins.
Definition: pio.h:336
#define PIO_INST_OUT
OUT opcode.
Definition: pio.h:202
#define PIO_INST_MOV
MOV opcode.
Definition: pio.h:283
void pio_set_isr_sm_vec(pio_t pio, unsigned irq, const pio_isr_sm_vec_t *vec)
Set ISR callbacks for state machine interrupts.
static bool pio_sm_rx_fifo_full(pio_t pio, pio_sm_t sm)
Check if RX FIFO is full.
Definition: pio.h:1322
static pio_instr_t pio_inst_irq(bool clear, bool wait, bool relative, unsigned index)
Construct an IRQ instruction.
Definition: pio.h:525
void pio_sm_set_out_pins_init(pio_t pio, pio_sm_t sm, const pio_gpio_init_t *pin_init)
Set output pins affected by 'out pins', 'out pindirs' and 'mov pins' instructions and initialize the ...
static pio_instr_t pio_inst_set(pio_inst_set_dst_t destination, unsigned data)
Construct a SET instruction.
Definition: pio.h:543
static pio_instr_t pio_inst_out(pio_inst_out_dst_t destination, unsigned bit_count)
Construct an OUT instruction.
Definition: pio.h:460
int pio_sm_exec(pio_t pio, pio_sm_t sm, pio_instr_t inst)
Execute a single instruction.
void pio_sm_reset_fifos(pio_t pio, pio_sm_t sm)
No joined FIFO.
static pio_instr_t pio_inst_mov(pio_inst_mov_dst_t destination, pio_inst_mov_op_t operation, pio_inst_mov_src_t source)
Construct a MOV instruction.
Definition: pio.h:506
void pio_sm_reset(pio_t pio, pio_sm_t sm)
Apply the default state machine configuration.
static bool pio_sm_tx_fifo_full(pio_t pio, pio_sm_t sm)
Check if TX FIFO is full.
Definition: pio.h:1296
pio_irq_line_t
PIO interrupt lines.
Definition: pio.h:702
@ PIO_IRQ_LINE_1
IRQ line 1.
Definition: pio.h:704
@ PIO_IRQ_LINE_0
IRQ line 0.
Definition: pio.h:703
@ PIO_IRQ_LINE_NUMOF
Number of IRQ lines.
Definition: pio.h:705
static pio_instr_t pio_inst_pull(bool if_empty, bool block)
Construct a PULL instruction.
Definition: pio.h:490
static bool pio_sm_tx_fifo_empty(pio_t pio, pio_sm_t sm)
Check if TX FIFO is empty.
Definition: pio.h:1283
static void pio_sm_clear_debug_rxstall(pio_t pio, unsigned sm_mask)
Clear RX stall debug flag.
Definition: pio.h:1269
void pio_sm_set_set_pins_init(pio_t pio, pio_sm_t sm, const pio_gpio_init_t *pin_init)
Set pins affected by 'set pins' and 'set pindirs' instructions and initialize the pins as PIO pins an...
static void pio_sm_clear_debug_rxunder(pio_t pio, unsigned sm_mask)
Clear RX underflow debug flag.
Definition: pio.h:1257
void pio_print_status(pio_t pio)
Print status information about the FIFOs and programs.
pio_sm_clkdiv_t pio_sm_clkdiv(uint32_t f_hz)
Create a clock divider struct.
struct pio_isr_sm_vec pio_isr_sm_vec_t
PIO state machine interrupt callbacks for state machine interrupts.
pio_inst_in_src_t
IN sources.
Definition: pio.h:191
@ PIO_INST_IN_SRC_PINS
From input pins.
Definition: pio.h:192
@ PIO_INST_IN_SRC_Y
From scratch Y.
Definition: pio.h:194
@ PIO_INST_IN_SRC_ISR
From input shift register.
Definition: pio.h:196
@ PIO_INST_IN_SRC_OSR
From output shift register.
Definition: pio.h:197
@ PIO_INST_IN_SRC_X
From scratch X.
Definition: pio.h:193
@ PIO_INST_IN_SRC_NULL
Fill with zeros.
Definition: pio.h:195
void pio_irq_clear(pio_t pio, unsigned irq_flags)
Clear interrupt flags.
#define PIO_INST_IRQ_CLR_SHIFT
IRQ clear flag shift position.
Definition: pio.h:355
void pio_sm_exec_block(pio_t pio, pio_sm_t sm, pio_instr_t inst)
Execute a single instruction.
pio_inst_mov_dst_t
MOV destinations.
Definition: pio.h:315
@ PIO_INST_MOV_DST_PINS
To output pins.
Definition: pio.h:316
@ PIO_INST_MOV_DST_ISR
To input shift register.
Definition: pio.h:321
@ PIO_INST_MOV_DST_Y
To scratch Y.
Definition: pio.h:318
@ PIO_INST_MOV_DST_OSR
To output shift register.
Definition: pio.h:322
@ PIO_INST_MOV_DST_PC
To program counter.
Definition: pio.h:320
@ PIO_INST_MOV_DST_EXEC
Execute data as instruction.
Definition: pio.h:319
@ PIO_INST_MOV_DST_X
To scratch X.
Definition: pio.h:317
pio_inst_wait_src_t
WAIT sources.
Definition: pio.h:163
@ PIO_INST_WAIT_SRC_IRQ
Wait on interrupt.
Definition: pio.h:166
@ PIO_INST_WAIT_SRC_PIN
Wait on input pin.
Definition: pio.h:165
@ PIO_INST_WAIT_SRC_GPIO
Wait on GPIO.
Definition: pio.h:164
void pio_sm_restart(pio_t pio, pio_sm_t sm)
Restart a state machine.
pio_irq_source_t
PIO IRQ flags.
Definition: pio.h:666
@ PIO_IRQ_TXNFULL_SM3
SM3 TX FIFO is not full.
Definition: pio.h:674
@ PIO_IRQ_TXNFULL_SM2
SM2 TX FIFO is not full.
Definition: pio.h:675
@ PIO_IRQ_SM_3
Any state machine issued irq 3.
Definition: pio.h:669
@ PIO_IRQ_SM_0
any state machine issued irq 0
Definition: pio.h:672
@ PIO_IRQ_RXNEMPTY_SM2
SM2 RX FIFO is not empty.
Definition: pio.h:679
@ PIO_IRQ_RXNEMPTY_SM3
SM3 RX FIFO is not empty.
Definition: pio.h:678
@ PIO_IRQ_SM_2
Any state machine issued irq 2.
Definition: pio.h:670
@ PIO_IRQ_SM_1
Any state machine issued irq 1.
Definition: pio.h:671
@ PIO_IRQ_TXNFULL_SM0
SM0 TX FIFO is not full.
Definition: pio.h:677
@ PIO_IRQ_TXNFULL_SM1
SM1 TX FIFO is not full.
Definition: pio.h:676
@ PIO_IRQ_RXNEMPTY_SM1
SM1 RX FIFO is not empty.
Definition: pio.h:680
@ PIO_IRQ_RXNEMPTY_SM0
SM0 RX FIFO is not empty.
Definition: pio.h:681
@ PIO_IRQ_ALL_SM
All SM interrupts.
Definition: pio.h:683
@ PIO_IRQ_ALL
All flags above.
Definition: pio.h:688
void pio_sm_transmit_words_block(pio_t pio, pio_sm_t sm, const uint32_t *words, unsigned count)
Send count words to a state machine.
#define PIO_INST_SET
SET opcode.
Definition: pio.h:375
#define PIO_INST_OUT_DESTINATION_SHIFT
OUT destination shift position.
Definition: pio.h:210
#define PIO_IRQ_NUMOF
Number of interrupt flags per PIO.
Definition: pio.h:40
#define PIO_INST_WAIT
WAIT opcode.
Definition: pio.h:128
#define PIO_INST_IN
IN opcode.
Definition: pio.h:171
static bool pio_sm_rx_fifo_empty(pio_t pio, pio_sm_t sm)
Check if RX FIFO is empty.
Definition: pio.h:1309
pio_inst_wait_pol_t
WAIT polarities.
Definition: pio.h:156
@ PIO_INST_WAIT_POL_LOW
Wait for 0.
Definition: pio.h:157
@ PIO_INST_WAIT_POL_HIGH
Wait for 1.
Definition: pio.h:158
void pio_sm_set_pindirs_with_mask(pio_t pio, pio_sm_t sm, gpio_t values, gpio_t mask)
Apply pin directions in values for which the corresponding bit in mask is set.
#define PIO_INST_WAIT_POL_SHIFT
WAIT polarity shift position.
Definition: pio.h:136
void pio_sm_receive_word_block(pio_t pio, pio_sm_t sm, uint32_t *word)
Receive one word from a state machine.
int pio_sm_init_common(pio_t pio, pio_sm_t sm, const pio_program_t *prog, const pio_program_conf_t *conf)
Apply common program configuration.
void pio_sm_receive_words_block(pio_t pio, pio_sm_t sm, uint32_t *words, unsigned count)
Receive words from a state machine.
#define PIO_INST_MOV_DESTINATION_SHIFT
MOV destination shift position.
Definition: pio.h:291
int pio_sm_receive_word(pio_t pio, pio_sm_t sm, uint32_t *word)
Receive a word from a state machine.
#define PIO_INST_PULL_BLOCK_SHIFT
PULL if TX FIFO is not empty flag shift position.
Definition: pio.h:275
void pio_sm_set_fifo_join_tx(pio_t pio, pio_sm_t sm)
Join the RX FIFO to the TX FIFO.
pio_sm_mask_t
PIO state machine flags.
Definition: pio.h:711
@ PIO_SM1
Mask bit of SM 1.
Definition: pio.h:713
@ PIO_SM0
Mask bit of SM 0.
Definition: pio.h:712
@ PIO_SM_ALL
All flags above.
Definition: pio.h:716
@ PIO_SM2
Mask bit of SM 2.
Definition: pio.h:714
@ PIO_SM3
Mask bit of SM 3.
Definition: pio.h:715
int pio_sm_transmit_word(pio_t pio, pio_sm_t sm, uint32_t word)
Send one word to a state machine.
void pio_sm_set_sideset_target(pio_t pio, pio_sm_t sm, bool pindir)
Configure whether a sideset effects pins or pin directions.
#define PIO_INST_PUSH_BLOCK_SHIFT
PUSH if RX FIFO is not full shift position.
Definition: pio.h:251
void pio_sm_set_clkdiv(pio_t pio, pio_sm_t sm, pio_sm_clkdiv_t clk)
Apply the clock configuration to a PIO.
struct pio_program_conf pio_program_conf_t
PIO program configuration.
static pio_instr_t pio_inst_wait(pio_inst_wait_pol_t polarity, pio_inst_wait_src_t source, bool relative, unsigned index)
Construct a WAIT instruction.
Definition: pio.h:427
#define PIO_INST_PUSH
PUSH opcode.
Definition: pio.h:235
#define PIO_INST_MOV_SOURCE_SHIFT
MOV source shift position.
Definition: pio.h:307
void pio_sm_transmit_word_block(pio_t pio, pio_sm_t sm, uint32_t word)
Send one word to a state machine.
void pio_sm_set_out_shift(pio_t pio, pio_sm_t sm, bool right, bool autopull, unsigned threshold)
Configure the shift out behaviour of a state machine.
int pio_write_program(pio_t pio, pio_program_t *prog, const pio_instr_t *instr)
Write program instructions to their allocated location.
#define PIO_INST_WAIT_SOURCE_SHIFT
WAIT source shift positions.
Definition: pio.h:144
void pio_sm_set_set_pins(pio_t pio, pio_sm_t sm, gpio_t pin_base, unsigned pin_count)
Configure which pins are effected by a 'set pins' instructions.
void pio_sm_set_sideset_pins(pio_t pio, pio_sm_t sm, gpio_t pin_base)
Set the first pin of a sequence of sideset count pins which are effected by sideset instructions.
pio_inst_set_dst_t
SET destinations.
Definition: pio.h:395
@ PIO_INST_SET_DST_Y
To scratch Y.
Definition: pio.h:398
@ PIO_INST_SET_DST_PINDIRS
To set pin directions.
Definition: pio.h:399
@ PIO_INST_SET_DST_PINS
To set pins.
Definition: pio.h:396
@ PIO_INST_SET_DST_X
To scratch X.
Definition: pio.h:397
static void pio_sm_clear_debug_txstall(pio_t pio, unsigned sm_mask)
Clear TX stall debug flag.
Definition: pio.h:1233
void pio_sm_set_fifo_join_rx(pio_t pio, pio_sm_t sm)
Join the TX FIFO to the RX FIFO.
#define PIO_SM_MASK(sm)
Convert state machine index to bitmask.
Definition: pio.h:597
void pio_sm_clkdiv_restart(pio_t pio, unsigned sm_mask)
Restart the clock divider of several state machines.
void pio_sm_set_jmp_pin(pio_t pio, pio_sm_t sm, gpio_t pin)
Configure the pin on which to branch on a 'jmp pins' instruction.
void pio_sm_set_in_pins(pio_t pio, pio_sm_t sm, gpio_t pin_base)
Configure the state machine input pin mapping.
pio_inst_mov_op_t
MOV operation.
Definition: pio.h:327
@ PIO_INST_MOV_OP_REVERSE
Bitwise reverse.
Definition: pio.h:330
@ PIO_INST_MOV_OP_NONE
No operation.
Definition: pio.h:328
@ PIO_INST_MOV_OP_INVERT
Bitwise complement.
Definition: pio.h:329
#define PIO_INST_IN_SOURCE_SHIFT
IN source shift position.
Definition: pio.h:179
#define PIO_INST_IRQ_WAIT_SHIFT
IRQ wait until cleared flag shift position.
Definition: pio.h:363
void pio_irq_enable(pio_t pio, pio_irq_line_t irq, pio_irq_source_t irq_mask)
Enable PIO<pio>_IRQ<irq> interrupts.
static pio_instr_t pio_inst_in(pio_inst_in_src_t source, unsigned bit_count)
Construct an IN instruction.
Definition: pio.h:445
High-level PIO peripheral driver interface.
Low-level GPIO peripheral driver interface definitions.
unsigned pio_t
PIO index type.
Definition: pio.h:70
int pio_sm_t
PIO state machine index type.
Definition: pio.h:80
void delay(unsigned long msec)
Sleep for a given amount of time [milliseconds].
static void io_reg_atomic_set(volatile uint32_t *reg, uint32_t mask)
Set the bits in the register at address reg as given by the set bits in operand op.
Definition: io_reg.h:84
Memory layout of GPIO control register in IO bank 0.
Definition: periph_cpu.h:376
Memory layout of GPIO control register in pads bank 0.
Definition: periph_cpu.h:286
PIO0_Type * dev
PIO device.
Definition: periph_cpu.h:463
Type used to configure PIO gpios pins.
Definition: pio.h:79
gpio_t gpio_direction
GPIO directions applied to pins, where the LSBit is the base.
Definition: pio.h:83
gpio_pad_ctrl_t pad
Pads bank GPIO control register configuration.
Definition: pio.h:80
gpio_io_ctrl_t io
IO bank GPIO control register.
Definition: pio.h:81
unsigned gpio_count
Number of GPIOs starting at base.
Definition: pio.h:85
gpio_t gpio_base
GPIO base.
Definition: pio.h:84
gpio_t gpio_state
GPIO states applied to pins, where the LSBit is the base.
Definition: pio.h:82
PIO state machine interrupt callbacks for state machine interrupts.
Definition: pio.h:743
void(* sm)(pio_t pio, unsigned irq)
Called when any SM issues an interrupt [0-3].
Definition: pio.h:750
PIO interrupt callbacks for FIFO interrupts.
Definition: pio.h:723
void(* tx_ready)(pio_t pio, pio_sm_t sm)
Called when Tx FIFO is not full.
Definition: pio.h:730
void(* rx_ready)(pio_t pio, pio_sm_t sm)
Called when Rx FIFO is not empty.
Definition: pio.h:737
PIO program configuration.
Definition: pio.h:756
unsigned pc_start
Initial program counter.
Definition: pio.h:757
unsigned wrap_bottom
Instruction index after which the PC wraps around.
Definition: pio.h:758
bool sideset_optional
Whether the sideset is optional.
Definition: pio.h:761
bool sideset_pindirs
Whether the sideset effects pin directions.
Definition: pio.h:762
unsigned sideset_count
Number of bits used for sideset.
Definition: pio.h:760
unsigned wrap_top
Instruction index the PC wraps to.
Definition: pio.h:759
Struct that models a PIO program.
Definition: pio.h:85
PIO clock configuration.
Definition: pio.h:768
uint16_t div
Integer divider.
Definition: pio.h:769
uint8_t frac_100
Fractional divider, two digits after comma.
Definition: pio.h:770
Internal state machine registers.
Definition: pio.h:575
volatile uint32_t clkdiv
SMx_CLKDIV.
Definition: pio.h:576
volatile uint32_t instr
SMx_INSTR.
Definition: pio.h:580
volatile uint32_t pinctrl
SMx_PINCTRL.
Definition: pio.h:581
volatile uint32_t shiftctrl
SMx_SHIFTCTRL.
Definition: pio.h:578
const volatile uint32_t addr
SMx_ADDR.
Definition: pio.h:579
volatile uint32_t execctrl
SMx_EXECCTRL.
Definition: pio.h:577