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probe: revert pins to Hi-Z when PORT_OFF is called

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Alternative implementation of #146
Fixes #146
This commit is contained in:
Jonathan Bell
2024-11-27 14:10:51 +00:00
parent 65b1e73589
commit 1182803822
3 changed files with 29 additions and 1 deletions
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2
src/probe.c
View File

@@ -171,7 +171,7 @@ void probe_deinit(void)
pio_remove_program(pio0, &probe_program, probe.offset);
probe_assert_reset(1); // de-assert nRESET
probe_gpio_deinit();
probe.initted = 0;
}
}

13
src/probe.pio
View File

@@ -86,6 +86,19 @@ static inline void probe_gpio_init()
gpio_pull_up(PROBE_PIN_SWDIO);
}
// DAP interface says all pins have to be High-Z when disabled
static inline void probe_gpio_deinit()
{
#if defined(PROBE_PIN_RESET)
gpio_deinit(PROBE_PIN_RESET);
gpio_disable_pulls(PROBE_PIN_RESET);
#endif
gpio_deinit(PROBE_PIN_SWCLK);
gpio_disable_pulls(PROBE_PIN_SWCLK);
gpio_deinit(PROBE_PIN_SWDIO);
gpio_disable_pulls(PROBE_PIN_SWDIO);
}
static inline void probe_sm_init(pio_sm_config* sm_config) {
// Set SWCLK as a sideset pin

15
src/probe_oen.pio
View File

@@ -63,6 +63,21 @@ static inline void probe_gpio_init()
gpio_pull_up(PROBE_PIN_SWDIOEN);
}
// DAP interface says all pins have to be High-Z when disabled
static inline void probe_gpio_deinit()
{
#if defined(PROBE_PIN_RESET)
gpio_deinit(PROBE_PIN_RESET);
gpio_disable_pulls(PROBE_PIN_RESET);
#endif
gpio_deinit(PROBE_PIN_SWCLK);
gpio_disable_pulls(PROBE_PIN_SWCLK);
// Note for SWDIOEN - make sure the driver output enable is removed before removing drive - leave pull-up enabled
gpio_deinit(PROBE_PIN_SWDIOEN);
gpio_deinit(PROBE_PIN_SWDIO);
gpio_disable_pulls(PROBE_PIN_SWDIO);
}
static inline void probe_sm_init(pio_sm_config* sm_config) {
// Set SWDIOEN and SWCLK as sideset pins