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Add PIO GPIO base selection addressing GPIO 32 and above #194

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Add PIO GPIO base selection addressing GPIO 32 and above #194

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39cbc17
Add PIO GPIO base selection addressing GPIO 32 and above
bengtsjolen Feb 4, 2026
bb650a1
adding PIO_PIN offsetting gpio base for probe_oen.pio too
bengtsjolen Feb 4, 2026
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2 changes: 2 additions & 0 deletions include/board_example_config.h
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,8 @@
#define PROBE_PIN_RESET 1

#define PROBE_SM 0
/* Set PROBE_PIO_BASE base to 16 to use gpio 32 and above */
#define PROBE_PIO_BASE 0
#define PROBE_PIN_OFFSET 12
/* PIO config for PROBE_IO_RAW */
#if defined(PROBE_IO_RAW)
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3 changes: 3 additions & 0 deletions src/probe.c
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Original file line number Diff line number Diff line change
Expand Up @@ -150,6 +150,9 @@ void probe_write_mode(void) {

void probe_init() {
if (!probe.initted) {
// MUST be early, before any SM config/init that uses pins
pio_set_gpio_base(pio0,PROBE_PIO_BASE);

probe_gpio_init();
uint offset = pio_add_program(pio0, &probe_program);
probe.offset = offset;
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10 changes: 5 additions & 5 deletions src/probe.pio
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Original file line number Diff line number Diff line change
Expand Up @@ -102,15 +102,15 @@ static inline void probe_gpio_deinit()
static inline void probe_sm_init(pio_sm_config* sm_config) {

// Set SWCLK as a sideset pin
sm_config_set_sideset_pins(sm_config, PROBE_PIN_SWCLK);
sm_config_set_sideset_pins(sm_config, PIO_PIN(PROBE_PIN_SWCLK));

// Set SWDIO offset
sm_config_set_out_pins(sm_config, PROBE_PIN_SWDIO, 1);
sm_config_set_set_pins(sm_config, PROBE_PIN_SWDIO, 1);
sm_config_set_out_pins(sm_config, PIO_PIN(PROBE_PIN_SWDIO), 1);
sm_config_set_set_pins(sm_config, PIO_PIN(PROBE_PIN_SWDIO), 1);
#ifdef PROBE_IO_SWDI
sm_config_set_in_pins(sm_config, PROBE_PIN_SWDI);
sm_config_set_in_pins(sm_config, PIO_PIN(PROBE_PIN_SWDI));
#else
sm_config_set_in_pins(sm_config, PROBE_PIN_SWDIO);
sm_config_set_in_pins(sm_config, PIO_PIN(PROBE_PIN_SWDIO));
#endif


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5 changes: 5 additions & 0 deletions src/probe_config.h
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Original file line number Diff line number Diff line change
Expand Up @@ -71,6 +71,11 @@ do { \
#include "board_debug_probe_config.h"
#endif
//#include "board_example_config.h"
#if !defined(PROBE_PIO_BASE)
#define PROBE_PIO_BASE 0
#endif
#define PIO_PIN(gpio) ((gpio) - PROBE_PIO_BASE)


// Add the configuration to binary information
void bi_decl_config();
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9 changes: 5 additions & 4 deletions src/probe_oen.pio
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Original file line number Diff line number Diff line change
Expand Up @@ -81,12 +81,13 @@ static inline void probe_gpio_deinit()
static inline void probe_sm_init(pio_sm_config* sm_config) {

// Set SWDIOEN and SWCLK as sideset pins
sm_config_set_sideset_pins(sm_config, PROBE_PIN_SWDIOEN);
sm_config_set_sideset_pins(sm_config, PIO_PIN(PROBE_PIN_SWDIOEN));

// Set SWDIO offset
sm_config_set_out_pins(sm_config, PROBE_PIN_SWDIO, 1);
sm_config_set_set_pins(sm_config, PROBE_PIN_SWDIO, 1);
sm_config_set_in_pins(sm_config, PROBE_PIN_SWDI);
sm_config_set_out_pins(sm_config, PIO_PIN(PROBE_PIN_SWDIO), 1);
sm_config_set_set_pins(sm_config, PIO_PIN(PROBE_PIN_SWDIO), 1);

sm_config_set_in_pins(sm_config, PIO_PIN(PROBE_PIN_SWDI));

// Set SWDIOEN, SWD and SWDIO pins as output to start. This will be set in the sm
pio_sm_set_consecutive_pindirs(pio0, PROBE_SM, PROBE_PIN_OFFSET, 3, true);
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