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soburisoburi
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zephyrCommon: Changing pin numbering rules
Zephyr's ba48d83bec18e9f2caf61979aadf9f8537086cee changes make it easy to configure pin numbering at compile, so we'll change the pin numbers to be based on the GPIO pin numbers. This is same as the traditional Arduino, using the GPIO numbers as pin numbers. Pin names written on the board, such as D1 and D2, are aliases for these pin numbers. When using multiple GPIO ports, pin numbers are numbered consecutively from the beginning. In other words, if you have two 16-port GPIOs, 17 refers to the second pin (idx=1) of the second port. Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@gmail.com>
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13 files changed

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‎cores/arduino/Arduino.h‎

Lines changed: 28 additions & 73 deletions
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
11
/*
22
* Copyright (c) 2022 Dhruva Gole
3+
* Copyright (c) 2025 TOKITA Hiroshi
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
@@ -14,87 +15,31 @@
1415
#include <zephyr/drivers/adc.h>
1516
#include <zephyr/drivers/i2c.h>
1617

17-
#define DIGITAL_PIN_EXISTS(n, p, i, dev, num) \
18-
(((dev == DT_REG_ADDR(DT_PHANDLE_BY_IDX(n, p, i))) && \
19-
(num == DT_PHA_BY_IDX(n, p, i, pin))) \
20-
? 1 \
21-
: 0)
22-
23-
/* Check all pins are defined only once */
24-
#define DIGITAL_PIN_CHECK_UNIQUE(i, _) \
25-
((DT_FOREACH_PROP_ELEM_SEP_VARGS( \
26-
DT_PATH(zephyr_user), digital_pin_gpios, DIGITAL_PIN_EXISTS, (+), \
27-
DT_REG_ADDR(DT_PHANDLE_BY_IDX(DT_PATH(zephyr_user), digital_pin_gpios, i)), \
28-
DT_PHA_BY_IDX(DT_PATH(zephyr_user), digital_pin_gpios, i, pin))) == 1)
29-
30-
#if !LISTIFY(DT_PROP_LEN(DT_PATH(zephyr_user), digital_pin_gpios), DIGITAL_PIN_CHECK_UNIQUE, (&&))
31-
#error "digital_pin_gpios has duplicate definition"
32-
#endif
33-
34-
#undef DIGITAL_PIN_CHECK_UNIQUE
35-
36-
#ifndef LED_BUILTIN
37-
38-
/* Return the index of it if matched, oterwise return 0 */
39-
#define LED_BUILTIN_INDEX_BY_REG_AND_PINNUM(n, p, i, dev, num) \
40-
(DIGITAL_PIN_EXISTS(n, p, i, dev, num) ? i : 0)
41-
42-
/* Only matched pin returns non-zero value, so the sum is matched pin's index */
43-
#define DIGITAL_PIN_GPIOS_FIND_PIN(dev, pin) \
44-
DT_FOREACH_PROP_ELEM_SEP_VARGS(DT_PATH(zephyr_user), digital_pin_gpios, \
45-
LED_BUILTIN_INDEX_BY_REG_AND_PINNUM, (+), dev, pin)
46-
47-
#if DT_NODE_HAS_PROP(DT_PATH(zephyr_user), builtin_led_gpios) && \
48-
(DT_PROP_LEN(DT_PATH(zephyr_user), builtin_led_gpios) > 0)
49-
50-
#if !(DT_FOREACH_PROP_ELEM_SEP_VARGS( \
51-
DT_PATH(zephyr_user), digital_pin_gpios, DIGITAL_PIN_EXISTS, (+), \
52-
DT_REG_ADDR(DT_PHANDLE_BY_IDX(DT_PATH(zephyr_user), builtin_led_gpios, 0)), \
53-
DT_PHA_BY_IDX(DT_PATH(zephyr_user), builtin_led_gpios, 0, pin)) > 0)
54-
#warning "pin not found in digital_pin_gpios"
55-
#else
56-
#define LED_BUILTIN \
57-
DIGITAL_PIN_GPIOS_FIND_PIN( \
58-
DT_REG_ADDR(DT_PHANDLE_BY_IDX(DT_PATH(zephyr_user), builtin_led_gpios, 0)), \
59-
DT_PHA_BY_IDX(DT_PATH(zephyr_user), builtin_led_gpios, 0, pin))
60-
#endif
61-
62-
/* If digital-pin-gpios is not defined, tries to use the led0 alias */
63-
#elif DT_NODE_EXISTS(DT_ALIAS(led0))
64-
65-
#if !(DT_FOREACH_PROP_ELEM_SEP_VARGS(DT_PATH(zephyr_user), digital_pin_gpios, DIGITAL_PIN_EXISTS, \
66-
(+), DT_REG_ADDR(DT_PHANDLE_BY_IDX(DT_ALIAS(led0), gpios, 0)), \
67-
DT_PHA_BY_IDX(DT_ALIAS(led0), gpios, 0, pin)) > 0)
68-
#warning "pin not found in digital_pin_gpios"
69-
#else
70-
#define LED_BUILTIN \
71-
DIGITAL_PIN_GPIOS_FIND_PIN(DT_REG_ADDR(DT_PHANDLE_BY_IDX(DT_ALIAS(led0), gpios, 0)), \
72-
DT_PHA_BY_IDX(DT_ALIAS(led0), gpios, 0, pin))
73-
#endif
74-
75-
#endif // builtin_led_gpios
76-
77-
#endif // LED_BUILTIN
78-
79-
#define DN_ENUMS(n, p, i) D##i = i
18+
#define ZARD_ADD_NGPIOS(i, n, p) DT_PROP(DT_PROP_BY_IDX(n, p, i), ngpios) +
19+
#define ZARD_ACCUM_NGPIOS(n, p, i, nd) \
20+
COND_CODE_1(DT_SAME_NODE(DT_PROP_BY_IDX(n, p, i), nd), \
21+
(LISTIFY(i, ZARD_ADD_NGPIOS, (), n, p)), ())
22+
#define ZARD_GLOBAL_GPIO_NUM(n, p, i) \
23+
DT_FOREACH_PROP_ELEM_VARGS(DT_PATH(zephyr_user), gpio_ports, ZARD_ACCUM_NGPIOS, \
24+
DT_PHANDLE_BY_IDX(n, p, i)) \
25+
DT_PHA_BY_IDX(n, p, i, pin)
8026

8127
/*
8228
* expand as
83-
* enum digitalPins { D0, D1, ... LED... NUM_OF_DIGITAL_PINS };
29+
* enum digitalPins { D0, D1, ... };
8430
*/
31+
#define ZARD_DN_ENUMS(n, p, i) D##i = ZARD_GLOBAL_GPIO_NUM(n, p, i)
8532
enum digitalPins {
86-
DT_FOREACH_PROP_ELEM_SEP(DT_PATH(zephyr_user), digital_pin_gpios, DN_ENUMS, (, )),
87-
NUM_OF_DIGITAL_PINS
33+
DT_FOREACH_PROP_ELEM_SEP(DT_PATH(zephyr_user), digital_pin_gpios, ZARD_DN_ENUMS, (, )),
34+
NUM_OF_DIGITAL_PINS
8835
};
8936

9037
#ifdef CONFIG_ADC
91-
92-
#define AN_ENUMS(n, p, i) A ## i = DIGITAL_PIN_GPIOS_FIND_PIN( \
93-
DT_REG_ADDR(DT_PHANDLE_BY_IDX(DT_PATH(zephyr_user), p, i)), \
94-
DT_PHA_BY_IDX(DT_PATH(zephyr_user), p, i, pin)),
95-
enum analogPins { DT_FOREACH_PROP_ELEM(DT_PATH(zephyr_user),
96-
adc_pin_gpios, AN_ENUMS) };
97-
38+
#define ZARD_AN_ENUMS(n, p, i) A##i = ZARD_GLOBAL_GPIO_NUM(n, p, i)
39+
enum analogPins {
40+
DT_FOREACH_PROP_ELEM_SEP(DT_PATH(zephyr_user), adc_pin_gpios, ZARD_AN_ENUMS, (, )),
41+
NUM_OF_ANALOG_PINS
42+
};
9843
#endif
9944

10045
void interrupts(void);
@@ -103,6 +48,16 @@ void noInterrupts(void);
10348
int digitalPinToInterrupt(pin_size_t pin);
10449

10550
#include <variant.h>
51+
52+
#ifndef LED_BUILTIN
53+
#if DT_NODE_HAS_PROP(DT_PATH(zephyr_user), builtin_led_gpios) \
54+
&& (DT_PROP_LEN(DT_PATH(zephyr_user), builtin_led_gpios) > 0)
55+
#define LED_BUILTIN ZARD_GLOBAL_GPIO_NUM(DT_PATH(zephyr_user), builtin_led_gpios, 0)
56+
#elif DT_NODE_EXISTS(DT_ALIAS(led0))
57+
#define LED_BUILTIN ZARD_GLOBAL_GPIO_NUM(DT_ALIAS(led0), gpios, 0)
58+
#endif
59+
#endif // LED_BUILTIN
60+
10661
#ifdef __cplusplus
10762
#include <zephyrPrint.h>
10863
#include <zephyrSerial.h>

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