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pio.h
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1/*
2 * Copyright (C) 2021 Otto-von-Guericke-Universität Magdeburg
3 *
4 * This file is subject to the terms and conditions of the GNU Lesser General
5 * Public License v2.1. See the file LICENSE in the top level directory for more
6 * details.
7 */
8
9#pragma once
10
20
21#include "periph_conf.h"
22#include "periph/gpio.h"
23#include "periph/pio.h"
24
25#ifdef __cplusplus
26extern "C" {
27#endif
28
29#if defined(CPU_MODEL_RP2040) || defined(DOXYGEN)
33#define PIO_SM_NUMOF 4
34
38#define PIO_INSTR_NUMOF 32
39
43#define PIO_IRQ_NUMOF 8
44#endif
45
49typedef uint16_t pio_instr_t;
50
56#define PIO_GPIO_INIT_HIGH(pin) (((gpio_t)(1)) << (pin))
57
63#define PIO_GPIO_INIT_LOW(pin) ((gpio_t)0)
64
70#define PIO_GPIO_INIT_OUT(pin) (((gpio_t)(1)) << (pin))
71
77#define PIO_GPIO_INIT_IN(pin) ((gpio_t)0)
78
90
98#define PIO_INST_JMP (0u << 13)
102#define PIO_INST_JMP_MASK (7u << 13)
106#define PIO_INST_JMP_CONDITION_SHIFT 5
110#define PIO_INST_JMP_CONDITION_MASK (7u << PIO_INST_JMP_CONDITION_SHIFT)
114#define PIO_INST_JMP_ADDRESS_MASK (31u)
128
131#define PIO_INST_WAIT (1u << 13)
135#define PIO_INST_WAIT_MASK (7u << 13)
139#define PIO_INST_WAIT_POL_SHIFT 7
143#define PIO_INST_WAIT_POL_MASK (1u << PIO_INST_WAIT_POL_SHIFT)
147#define PIO_INST_WAIT_SOURCE_SHIFT 5
151#define PIO_INST_WAIT_SOURCE_MASK (3u << PIO_INST_WAIT_SOURCE_SHIFT)
155#define PIO_INST_WAIT_INDEX_MASK (31u)
163
171
174#define PIO_INST_IN (2u << 13)
178#define PIO_INST_IN_MASK (7u << 13)
182#define PIO_INST_IN_SOURCE_SHIFT 5
186#define PIO_INST_IN_SOURCE_MASK (7u << PIO_INST_IN_SOURCE_SHIFT)
190#define PIO_INST_IN_BIT_COUNT_MASK (31u)
202
205#define PIO_INST_OUT (3u << 13)
209#define PIO_INST_OUT_MASK (7u << 13)
213#define PIO_INST_OUT_DESTINATION_SHIFT 5
217#define PIO_INST_OUT_DESTINATION_MASK (7u << PIO_INST_OUT_DESTINATION_SHIFT)
221#define PIO_INST_OUT_BIT_COUNT_MASK (31u)
235
238#define PIO_INST_PUSH (4u << 13)
242#define PIO_INST_PUSH_MASK ((7u << 13) | (1u << 7) | 31u)
246#define PIO_INST_PUSH_IF_FULL_SHIFT 6
250#define PIO_INST_PUSH_IF_FULL_MASK (1u << PIO_INST_PUSH_IF_FULL_SHIFT)
254#define PIO_INST_PUSH_BLOCK_SHIFT 5
258#define PIO_INST_PUSH_BLOCK_MASK (1u << PIO_INST_PUSH_BLOCK_SHIFT)
262#define PIO_INST_PULL ((4u << 13) | (1u << 7))
266#define PIO_INST_PULL_MASK ((7u << 13) | (1u << 7) | 31u)
270#define PIO_INST_PULL_IF_EMPTY_SHIFT 6
274#define PIO_INST_PULL_IF_EMPTY_MASK (1u << PIO_INST_PULL_IF_EMPTY_SHIFT)
278#define PIO_INST_PULL_BLOCK_SHIFT 5
282#define PIO_INST_PULL_BLOCK_MASK (1u << PIO_INST_PULL_BLOCK_SHIFT)
286#define PIO_INST_MOV (5u << 13)
290#define PIO_INST_MOV_MASK (7u << 13)
294#define PIO_INST_MOV_DESTINATION_SHIFT 5
298#define PIO_INST_MOV_DESTINATION_MASK (7u << PIO_INST_MOV_DESTINATION_SHIFT)
302#define PIO_INST_MOV_OP_SHIFT 3
306#define PIO_INST_MOV_OP_MASK (3u << PIO_INST_MOV_OP_SHIFT)
310#define PIO_INST_MOV_SOURCE_SHIFT 0
314#define PIO_INST_MOV_SOURCE_MASK (7u)
327
335
347
350#define PIO_INST_IRQ (6u << 13)
354#define PIO_INST_IRQ_MASK ((7u << 13) | (1u << 7))
358#define PIO_INST_IRQ_CLR_SHIFT 6
362#define PIO_INST_IRQ_CLR_MASK (1u << PIO_INST_IRQ_CLR_SHIFT)
366#define PIO_INST_IRQ_WAIT_SHIFT 5
370#define PIO_INST_IRQ_WAIT_MASK (1u << PIO_INST_IRQ_WAIT_SHIFT)
374#define PIO_INST_IRQ_INDEX_MASK (31u)
378#define PIO_INST_SET (7u << 13)
382#define PIO_INST_SET_MASK (7u << 13)
386#define PIO_INST_SET_DESTINATION_SHIFT 5
390#define PIO_INST_SET_DESTINATION_MASK (7u << PIO_INST_SET_DESTINATION_SHIFT)
394#define PIO_INST_SET_DATA_MASK (31u)
404
414 unsigned address)
415{
416 return PIO_INST_JMP |
417 (((unsigned)condition) << PIO_INST_JMP_CONDITION_SHIFT) |
418 address;
419}
420
431 pio_inst_wait_src_t source,
432 bool relative,
433 unsigned index)
434{
435 return PIO_INST_WAIT |
436 ((unsigned)polarity << PIO_INST_WAIT_POL_SHIFT) |
437 ((unsigned)source << PIO_INST_WAIT_SOURCE_SHIFT) |
438 ((!!relative) << 4) | index;
439}
440
449 unsigned bit_count)
450{
451 return PIO_INST_IN |
452 ((unsigned)source << PIO_INST_IN_SOURCE_SHIFT) |
453 (bit_count % 32);
454}
455
464 unsigned bit_count)
465{
466 return PIO_INST_OUT |
467 ((unsigned)destination << PIO_INST_OUT_DESTINATION_SHIFT) |
468 (bit_count % 32);
469}
470
478static inline pio_instr_t pio_inst_push(bool if_full,
479 bool block)
480{
481 return PIO_INST_PUSH |
482 ((!!if_full) << PIO_INST_PUSH_IF_FULL_SHIFT) |
483 ((!!block) << PIO_INST_PUSH_BLOCK_SHIFT);
484}
485
493static inline pio_instr_t pio_inst_pull(bool if_empty,
494 bool block)
495{
496 return PIO_INST_PULL |
497 ((!!if_empty) << PIO_INST_PULL_IF_EMPTY_SHIFT) |
498 ((!!block) << PIO_INST_PULL_BLOCK_SHIFT);
499}
500
510 pio_inst_mov_op_t operation,
511 pio_inst_mov_src_t source)
512{
513 return PIO_INST_MOV |
514 ((unsigned)destination << PIO_INST_MOV_DESTINATION_SHIFT) |
515 ((unsigned)operation << PIO_INST_MOV_OP_SHIFT) |
516 ((unsigned)source << PIO_INST_MOV_SOURCE_SHIFT);
517}
518
528static inline pio_instr_t pio_inst_irq(bool clear,
529 bool wait,
530 bool relative,
531 unsigned index)
532{
533 return PIO_INST_IRQ |
534 (!!clear << PIO_INST_IRQ_CLR_SHIFT) |
535 (!!wait << PIO_INST_IRQ_WAIT_SHIFT) |
536 ((!!relative << 4) | index);
537}
538
547 unsigned data)
548{
549 return PIO_INST_SET |
550 ((unsigned)destination << PIO_INST_SET_DESTINATION_SHIFT) |
551 data;
552}
553
564static inline pio_instr_t pio_inst_delay_sideset(unsigned sideset,
565 unsigned sideset_count,
566 bool sideset_opt,
567 unsigned delay)
568{
569 return ((!!sideset_opt) << 12) |
570 (sideset << (13 - (!!sideset_opt + sideset_count))) |
571 (delay << 8);
572}
573
574
578typedef struct pio_sm_ctrl_regs {
579 volatile uint32_t clkdiv;
580 volatile uint32_t execctrl;
581 volatile uint32_t shiftctrl;
582 const volatile uint32_t addr;
583 volatile uint32_t instr;
584 volatile uint32_t pinctrl;
586
590#define PIO_SM_CTRL_BASE(dev) ((pio_sm_ctrl_regs_t *)(&((dev)->SM0_CLKDIV)))
591
595#define PIO_SM_CLKDIV_MAX 65536
596
600#define PIO_SM_MASK(sm) (1u << (sm))
601
605#define PIO_IRQ_MASK(irq) (1u << (irq))
606
639static inline unsigned pio_irq_rel_index(unsigned irq_abs, unsigned sm) {
640 assert(irq_abs < PIO_IRQ_NUMOF);
641 assert(sm < PIO_SM_NUMOF);
642 return (irq_abs & 0b100u) | ((irq_abs + sm) & 0b011u);
643}
644
655static inline unsigned pio_irq_rel_sm(unsigned irq_abs, unsigned irq_rel) {
656 assert(irq_abs < PIO_IRQ_NUMOF);
657 assert(irq_rel < PIO_IRQ_NUMOF);
658 return (irq_abs & 0b100u) | ((irq_rel - irq_abs) & 0b011u);
659}
660
664#define PIO_IRQ_REL_MASK(irq, sm) PIO_IRQ_MASK(pio_irq_rel_index(irq, sm))
665
669typedef enum {
670 /* lower 4 hardware IRQs which are issued with 'irq <0-3> [rel]' and are routed to NVIC */
671 /* This does not encode the state machine index of which state machine fired! */
672 PIO_IRQ_SM_3 = PIO0_INTR_SM3_Msk,
673 PIO_IRQ_SM_2 = PIO0_INTR_SM2_Msk,
674 PIO_IRQ_SM_1 = PIO0_INTR_SM1_Msk,
675 PIO_IRQ_SM_0 = PIO0_INTR_SM0_Msk,
676 /* FIFO interrupts per state machine */
677 PIO_IRQ_TXNFULL_SM3 = PIO0_INTR_SM3_TXNFULL_Msk,
678 PIO_IRQ_TXNFULL_SM2 = PIO0_INTR_SM2_TXNFULL_Msk,
679 PIO_IRQ_TXNFULL_SM1 = PIO0_INTR_SM1_TXNFULL_Msk,
680 PIO_IRQ_TXNFULL_SM0 = PIO0_INTR_SM0_TXNFULL_Msk,
681 PIO_IRQ_RXNEMPTY_SM3 = PIO0_INTR_SM3_RXNEMPTY_Msk,
682 PIO_IRQ_RXNEMPTY_SM2 = PIO0_INTR_SM2_RXNEMPTY_Msk,
683 PIO_IRQ_RXNEMPTY_SM1 = PIO0_INTR_SM1_RXNEMPTY_Msk,
684 PIO_IRQ_RXNEMPTY_SM0 = PIO0_INTR_SM0_RXNEMPTY_Msk,
685 /* all routed state machine interrupts */
689 PIO_IRQ_SM_0),
690 /* all interrupts */
701
710
722
726typedef struct pio_isr_vec {
733 void (*tx_ready)(pio_t pio, pio_sm_t sm);
740 void (*rx_ready)(pio_t pio, pio_sm_t sm);
742
746typedef struct pio_isr_sm_vec {
753 void (*sm)(pio_t pio, unsigned irq);
755
767
771typedef struct pio_sm_clkdiv {
772 uint16_t div;
773 uint8_t frac_100;
775
791
804
815 int pio_write_program(pio_t pio, pio_program_t *prog, const pio_instr_t *instr);
816
824
832
840void pio_set_isr_vec(pio_t pio, pio_sm_t sm, const pio_isr_vec_t *vec);
841
849void pio_set_isr_sm_vec(pio_t pio, unsigned irq, const pio_isr_sm_vec_t *vec);
850
862void pio_sm_set_out_pins(pio_t pio, pio_sm_t sm, gpio_t pin_base, unsigned pin_count);
863
873void pio_sm_set_in_pins(pio_t pio, pio_sm_t sm, gpio_t pin_base);
874
886void pio_sm_set_set_pins(pio_t pio, pio_sm_t sm, gpio_t pin_base, unsigned pin_count);
887
896void pio_sm_set_sideset_pins(pio_t pio, pio_sm_t sm, gpio_t pin_base);
897
910void pio_sm_set_sideset_count(pio_t pio, pio_sm_t sm, unsigned pin_count, bool enable);
911
919void pio_sm_set_sideset_target(pio_t pio, pio_sm_t sm, bool pindir);
920
932
946
956void pio_sm_clkdiv_restart(pio_t pio, unsigned sm_mask);
957
967void pio_sm_set_wrap(pio_t pio, pio_sm_t sm, unsigned prog_loc, uint8_t top, uint8_t bottom);
968
978void pio_sm_set_jmp_pin(pio_t pio, pio_sm_t sm, gpio_t pin);
979
989void pio_sm_set_in_shift(pio_t pio, pio_sm_t sm, bool right, bool autopush, unsigned threshold);
990
1000void pio_sm_set_out_shift(pio_t pio, pio_sm_t sm, bool right, bool autopull, unsigned threshold);
1001
1009
1017
1025
1033
1042
1051
1065int pio_sm_transmit_word(pio_t pio, pio_sm_t sm, uint32_t word);
1066
1076void pio_sm_transmit_word_block(pio_t pio, pio_sm_t sm, uint32_t word);
1077
1088void pio_sm_transmit_words_block(pio_t pio, pio_sm_t sm, const uint32_t *words, unsigned count);
1089
1103int pio_sm_receive_word(pio_t pio, pio_sm_t sm, uint32_t *word);
1104
1114void pio_sm_receive_word_block(pio_t pio, pio_sm_t sm, uint32_t *word);
1115
1126void pio_sm_receive_words_block(pio_t pio, pio_sm_t sm, uint32_t *words, unsigned count);
1127
1135uint32_t pio_irq_get(pio_t pio);
1136
1143void pio_irq_clear(pio_t pio, unsigned irq_flags);
1144
1160 const pio_program_conf_t *conf);
1161
1172void pio_sm_set_pindirs_with_mask(pio_t pio, pio_sm_t sm, gpio_t values, gpio_t mask);
1173
1184void pio_sm_set_pins_with_mask(pio_t pio, pio_sm_t sm, gpio_t values, gpio_t mask);
1185
1195
1205
1215
1222
1229
1236static inline void pio_sm_clear_debug_txstall(pio_t pio, unsigned sm_mask)
1237{
1238 io_reg_atomic_set(&pio_config[pio].dev->FDEBUG,
1239 ((sm_mask & PIO_SM_ALL) << PIO0_FDEBUG_TXSTALL_Pos));
1240}
1241
1248static inline void pio_sm_clear_debug_txover(pio_t pio, unsigned sm_mask)
1249{
1250 io_reg_atomic_set(&pio_config[pio].dev->FDEBUG,
1251 ((sm_mask & PIO_SM_ALL) << PIO0_FDEBUG_TXOVER_Pos));
1252}
1253
1260static inline void pio_sm_clear_debug_rxunder(pio_t pio, unsigned sm_mask)
1261{
1262 io_reg_atomic_set(&pio_config[pio].dev->FDEBUG,
1263 ((sm_mask & PIO_SM_ALL) << PIO0_FDEBUG_RXUNDER_Pos));
1264}
1265
1272static inline void pio_sm_clear_debug_rxstall(pio_t pio, unsigned sm_mask)
1273{
1274 io_reg_atomic_set(&pio_config[pio].dev->FDEBUG,
1275 ((sm_mask & PIO_SM_ALL) << PIO0_FDEBUG_RXSTALL_Pos));
1276}
1277
1286static inline bool pio_sm_tx_fifo_empty(pio_t pio, pio_sm_t sm)
1287{
1288 return !!(pio_config[pio].dev->FSTAT & ((1u << sm) << PIO0_FSTAT_TXEMPTY_Pos));
1289}
1290
1299static inline bool pio_sm_tx_fifo_full(pio_t pio, pio_sm_t sm)
1300{
1301 return !!(pio_config[pio].dev->FSTAT & ((1u << sm) << PIO0_FSTAT_TXFULL_Pos));
1302}
1303
1312static inline bool pio_sm_rx_fifo_empty(pio_t pio, pio_sm_t sm)
1313{
1314 return !!(pio_config[pio].dev->FSTAT & ((1u << sm) << PIO0_FSTAT_RXEMPTY_Pos));
1315}
1316
1325static inline bool pio_sm_rx_fifo_full(pio_t pio, pio_sm_t sm)
1326{
1327 return !!((pio_config[pio].dev)->FSTAT & ((1u << sm) << PIO0_FSTAT_RXFULL_Pos));
1328}
1329
1330#ifdef __cplusplus
1331}
1332#endif
1333
#define assert(cond)
abort the program if assertion is false
Definition assert.h:135
static const pio_conf_t pio_config[]
Array of PIO configurations.
static unsigned pio_irq_rel_index(unsigned irq_abs, unsigned sm)
Convert absolute IRQ index to relative IRQ index.
Definition pio.h:639
uint16_t pio_instr_t
Type to represent the width of an instruction.
Definition pio.h:49
static pio_instr_t pio_inst_jmp(pio_inst_jmp_cond_t condition, unsigned address)
Construct a JMP instruction.
Definition pio.h:413
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:1248
pio_inst_jmp_cond_t
JMP conditions.
Definition pio.h:118
@ PIO_INST_JMP_COND_NOT_X_EQ_Y
If scratch X != scratch Y.
Definition pio.h:124
@ PIO_INST_JMP_COND_NONE
Unconditionally.
Definition pio.h:119
@ PIO_INST_JMP_COND_PIN
If jump pin is high.
Definition pio.h:125
@ PIO_INST_JMP_COND_X_DEC
If scratch X– is not 0.
Definition pio.h:121
@ PIO_INST_JMP_COND_X_ZERO
If scratch X is 0.
Definition pio.h:120
@ PIO_INST_JMP_COND_Y_ZERO
If scratch Y is 0.
Definition pio.h:122
@ PIO_INST_JMP_COND_Y_DEC
If scratch Y– is not 0.
Definition pio.h:123
@ PIO_INST_JMP_COND_NOT_OSR_EMPTY
If OSR is not empty.
Definition pio.h:126
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:33
pio_inst_out_dst_t
OUT destinations.
Definition pio.h:225
@ PIO_INST_OUT_DST_PINS
To output pins.
Definition pio.h:226
@ PIO_INST_OUT_DST_NULL
Discard data.
Definition pio.h:229
@ PIO_INST_OUT_DST_PC
To program counter.
Definition pio.h:231
@ PIO_INST_OUT_DST_PINDIRS
To output pin directions.
Definition pio.h:230
@ PIO_INST_OUT_DST_Y
To scratch Y.
Definition pio.h:228
@ PIO_INST_OUT_DST_X
To scratch X.
Definition pio.h:227
@ PIO_INST_OUT_DST_ISR
To input shift register.
Definition pio.h:232
@ PIO_INST_OUT_DST_EXEC
Execute as instruction.
Definition pio.h:233
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:106
static pio_instr_t pio_inst_push(bool if_full, bool block)
Construct a PUSH instruction.
Definition pio.h:478
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:262
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:246
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:270
#define PIO_INST_JMP
JMP opcode.
Definition pio.h:98
#define PIO_INST_SET_DESTINATION_SHIFT
SET destination shift position.
Definition pio.h:386
#define PIO_INST_IRQ
IRQ opcode.
Definition pio.h:350
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:655
#define PIO_INST_MOV_OP_SHIFT
MOV operation shift position.
Definition pio.h:302
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:564
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:338
@ PIO_INST_MOV_SRC_NULL
Fill with zeros.
Definition pio.h:342
@ PIO_INST_MOV_SRC_X
From scratch X.
Definition pio.h:340
@ PIO_INST_MOV_SRC_STATUS
From status.
Definition pio.h:343
@ PIO_INST_MOV_SRC_Y
From scratch Y.
Definition pio.h:341
@ PIO_INST_MOV_SRC_OSR
From output shift register.
Definition pio.h:345
@ PIO_INST_MOV_SRC_ISR
From input shift register.
Definition pio.h:344
@ PIO_INST_MOV_SRC_PINS
From input pins.
Definition pio.h:339
#define PIO_INST_OUT
OUT opcode.
Definition pio.h:205
#define PIO_INST_MOV
MOV opcode.
Definition pio.h:286
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:1325
static pio_instr_t pio_inst_irq(bool clear, bool wait, bool relative, unsigned index)
Construct an IRQ instruction.
Definition pio.h:528
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:546
static pio_instr_t pio_inst_out(pio_inst_out_dst_t destination, unsigned bit_count)
Construct an OUT instruction.
Definition pio.h:463
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:509
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:1299
pio_irq_line_t
PIO interrupt lines.
Definition pio.h:705
@ PIO_IRQ_LINE_1
IRQ line 1.
Definition pio.h:707
@ PIO_IRQ_LINE_0
IRQ line 0.
Definition pio.h:706
@ PIO_IRQ_LINE_NUMOF
Number of IRQ lines.
Definition pio.h:708
static pio_instr_t pio_inst_pull(bool if_empty, bool block)
Construct a PULL instruction.
Definition pio.h:493
static bool pio_sm_tx_fifo_empty(pio_t pio, pio_sm_t sm)
Check if TX FIFO is empty.
Definition pio.h:1286
static void pio_sm_clear_debug_rxstall(pio_t pio, unsigned sm_mask)
Clear RX stall debug flag.
Definition pio.h:1272
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:1260
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:194
@ PIO_INST_IN_SRC_PINS
From input pins.
Definition pio.h:195
@ PIO_INST_IN_SRC_Y
From scratch Y.
Definition pio.h:197
@ PIO_INST_IN_SRC_ISR
From input shift register.
Definition pio.h:199
@ PIO_INST_IN_SRC_OSR
From output shift register.
Definition pio.h:200
@ PIO_INST_IN_SRC_X
From scratch X.
Definition pio.h:196
@ PIO_INST_IN_SRC_NULL
Fill with zeros.
Definition pio.h:198
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:358
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:318
@ PIO_INST_MOV_DST_PINS
To output pins.
Definition pio.h:319
@ PIO_INST_MOV_DST_ISR
To input shift register.
Definition pio.h:324
@ PIO_INST_MOV_DST_Y
To scratch Y.
Definition pio.h:321
@ PIO_INST_MOV_DST_OSR
To output shift register.
Definition pio.h:325
@ PIO_INST_MOV_DST_PC
To program counter.
Definition pio.h:323
@ PIO_INST_MOV_DST_EXEC
Execute data as instruction.
Definition pio.h:322
@ PIO_INST_MOV_DST_X
To scratch X.
Definition pio.h:320
pio_inst_wait_src_t
WAIT sources.
Definition pio.h:166
@ PIO_INST_WAIT_SRC_IRQ
Wait on interrupt.
Definition pio.h:169
@ PIO_INST_WAIT_SRC_PIN
Wait on input pin.
Definition pio.h:168
@ PIO_INST_WAIT_SRC_GPIO
Wait on GPIO.
Definition pio.h:167
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:669
@ PIO_IRQ_TXNFULL_SM3
SM3 TX FIFO is not full.
Definition pio.h:677
@ PIO_IRQ_TXNFULL_SM2
SM2 TX FIFO is not full.
Definition pio.h:678
@ PIO_IRQ_SM_3
Any state machine issued irq 3.
Definition pio.h:672
@ PIO_IRQ_SM_0
any state machine issued irq 0
Definition pio.h:675
@ PIO_IRQ_RXNEMPTY_SM2
SM2 RX FIFO is not empty.
Definition pio.h:682
@ PIO_IRQ_RXNEMPTY_SM3
SM3 RX FIFO is not empty.
Definition pio.h:681
@ PIO_IRQ_SM_2
Any state machine issued irq 2.
Definition pio.h:673
@ PIO_IRQ_SM_1
Any state machine issued irq 1.
Definition pio.h:674
@ PIO_IRQ_TXNFULL_SM0
SM0 TX FIFO is not full.
Definition pio.h:680
@ PIO_IRQ_TXNFULL_SM1
SM1 TX FIFO is not full.
Definition pio.h:679
@ PIO_IRQ_RXNEMPTY_SM1
SM1 RX FIFO is not empty.
Definition pio.h:683
@ PIO_IRQ_RXNEMPTY_SM0
SM0 RX FIFO is not empty.
Definition pio.h:684
@ PIO_IRQ_ALL_SM
All SM interrupts.
Definition pio.h:686
@ PIO_IRQ_ALL
All flags above.
Definition pio.h:691
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:378
#define PIO_INST_OUT_DESTINATION_SHIFT
OUT destination shift position.
Definition pio.h:213
#define PIO_IRQ_NUMOF
Number of interrupt flags per PIO.
Definition pio.h:43
#define PIO_INST_WAIT
WAIT opcode.
Definition pio.h:131
#define PIO_INST_IN
IN opcode.
Definition pio.h:174
static bool pio_sm_rx_fifo_empty(pio_t pio, pio_sm_t sm)
Check if RX FIFO is empty.
Definition pio.h:1312
pio_inst_wait_pol_t
WAIT polarities.
Definition pio.h:159
@ PIO_INST_WAIT_POL_LOW
Wait for 0.
Definition pio.h:160
@ PIO_INST_WAIT_POL_HIGH
Wait for 1.
Definition pio.h:161
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:139
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:294
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:278
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:714
@ PIO_SM1
Mask bit of SM 1.
Definition pio.h:716
@ PIO_SM0
Mask bit of SM 0.
Definition pio.h:715
@ PIO_SM_ALL
All flags above.
Definition pio.h:719
@ PIO_SM2
Mask bit of SM 2.
Definition pio.h:717
@ PIO_SM3
Mask bit of SM 3.
Definition pio.h:718
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:254
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:430
#define PIO_INST_PUSH
PUSH opcode.
Definition pio.h:238
#define PIO_INST_MOV_SOURCE_SHIFT
MOV source shift position.
Definition pio.h:310
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:147
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:398
@ PIO_INST_SET_DST_Y
To scratch Y.
Definition pio.h:401
@ PIO_INST_SET_DST_PINDIRS
To set pin directions.
Definition pio.h:402
@ PIO_INST_SET_DST_PINS
To set pins.
Definition pio.h:399
@ PIO_INST_SET_DST_X
To scratch X.
Definition pio.h:400
static void pio_sm_clear_debug_txstall(pio_t pio, unsigned sm_mask)
Clear TX stall debug flag.
Definition pio.h:1236
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:600
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:330
@ PIO_INST_MOV_OP_REVERSE
Bitwise reverse.
Definition pio.h:333
@ PIO_INST_MOV_OP_NONE
No operation.
Definition pio.h:331
@ PIO_INST_MOV_OP_INVERT
Bitwise complement.
Definition pio.h:332
#define PIO_INST_IN_SOURCE_SHIFT
IN source shift position.
Definition pio.h:182
#define PIO_INST_IRQ_WAIT_SHIFT
IRQ wait until cleared flag shift position.
Definition pio.h:366
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:448
High-level PIO peripheral driver interface.
Low-level GPIO peripheral driver interface definitions.
unsigned pio_t
PIO index type.
Definition pio.h:75
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:87
Memory layout of GPIO control register in IO bank 0.
Definition periph_cpu.h:379
Memory layout of GPIO control register in pads bank 0.
Definition periph_cpu.h:289
Type used to configure PIO gpios pins.
Definition pio.h:82
gpio_t gpio_direction
GPIO directions applied to pins, where the LSBit is the base.
Definition pio.h:86
gpio_pad_ctrl_t pad
Pads bank GPIO control register configuration.
Definition pio.h:83
gpio_io_ctrl_t io
IO bank GPIO control register.
Definition pio.h:84
unsigned gpio_count
Number of GPIOs starting at base.
Definition pio.h:88
gpio_t gpio_base
GPIO base.
Definition pio.h:87
gpio_t gpio_state
GPIO states applied to pins, where the LSBit is the base.
Definition pio.h:85
PIO state machine interrupt callbacks for state machine interrupts.
Definition pio.h:746
void(* sm)(pio_t pio, unsigned irq)
Called when any SM issues an interrupt [0-3].
Definition pio.h:753
PIO interrupt callbacks for FIFO interrupts.
Definition pio.h:726
void(* tx_ready)(pio_t pio, pio_sm_t sm)
Called when Tx FIFO is not full.
Definition pio.h:733
void(* rx_ready)(pio_t pio, pio_sm_t sm)
Called when Rx FIFO is not empty.
Definition pio.h:740
PIO program configuration.
Definition pio.h:759
unsigned pc_start
Initial program counter.
Definition pio.h:760
unsigned wrap_bottom
Instruction index after which the PC wraps around.
Definition pio.h:761
bool sideset_optional
Whether the sideset is optional.
Definition pio.h:764
bool sideset_pindirs
Whether the sideset effects pin directions.
Definition pio.h:765
unsigned sideset_count
Number of bits used for sideset.
Definition pio.h:763
unsigned wrap_top
Instruction index the PC wraps to.
Definition pio.h:762
Struct that models a PIO program.
Definition pio.h:85
PIO clock configuration.
Definition pio.h:771
uint16_t div
Integer divider.
Definition pio.h:772
uint8_t frac_100
Fractional divider, two digits after comma.
Definition pio.h:773
Internal state machine registers.
Definition pio.h:578
volatile uint32_t clkdiv
SMx_CLKDIV.
Definition pio.h:579
volatile uint32_t instr
SMx_INSTR.
Definition pio.h:583
volatile uint32_t pinctrl
SMx_PINCTRL.
Definition pio.h:584
volatile uint32_t shiftctrl
SMx_SHIFTCTRL.
Definition pio.h:581
const volatile uint32_t addr
SMx_ADDR.
Definition pio.h:582
volatile uint32_t execctrl
SMx_EXECCTRL.
Definition pio.h:580