diff options
| author | robert-hh <robert@hammelrath.com> | 2025-03-13 15:47:48 +0100 |
|---|---|---|
| committer | Damien George <damien@micropython.org> | 2025-03-25 12:42:26 +1100 |
| commit | 1e7328ca28de201d6cd1ef31fb64e37613c0f9fb (patch) | |
| tree | d67c4ed52b95fcf0a70279e12925384f4696d36e | |
| parent | b85ad4bd4128876908ed0493a1b1d3df3d972cf1 (diff) | |
mimxrt/machine_i2c: Support the timeout keyword argument.
Set the default timeout to 50000 us. The default used to be 0, causing the
NXP I2C driver to silently stop working in case of a non-responding device.
Signed-off-by: robert-hh <robert@hammelrath.com>
| -rw-r--r-- | ports/mimxrt/machine_i2c.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/ports/mimxrt/machine_i2c.c b/ports/mimxrt/machine_i2c.c index 89fe47dbf..b9d23a23c 100644 --- a/ports/mimxrt/machine_i2c.c +++ b/ports/mimxrt/machine_i2c.c @@ -36,6 +36,7 @@ #define DEFAULT_I2C_FREQ (400000) #define DEFAULT_I2C_DRIVE (6) +#define DEFAULT_I2C_TIMEOUT (50000) typedef struct _machine_i2c_obj_t { mp_obj_base_t base; @@ -82,16 +83,18 @@ bool lpi2c_set_iomux(int8_t hw_i2c, uint8_t drive) { static void machine_i2c_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) { machine_i2c_obj_t *self = MP_OBJ_TO_PTR(self_in); - mp_printf(print, "I2C(%u, freq=%u)", - self->i2c_id, self->master_config->baudRate_Hz); + mp_printf(print, "I2C(%u, freq=%u, timeout=%u)", + self->i2c_id, self->master_config->baudRate_Hz, + self->master_config->pinLowTimeout_ns / 1000); } mp_obj_t machine_i2c_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) { - enum { ARG_id, ARG_freq, ARG_drive}; + enum { ARG_id, ARG_freq, ARG_drive, ARG_timeout}; static const mp_arg_t allowed_args[] = { { MP_QSTR_id, MP_ARG_REQUIRED | MP_ARG_OBJ }, { MP_QSTR_freq, MP_ARG_INT, {.u_int = DEFAULT_I2C_FREQ} }, { MP_QSTR_drive, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = DEFAULT_I2C_DRIVE} }, + { MP_QSTR_timeout, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = DEFAULT_I2C_TIMEOUT} }, }; // Parse args. @@ -121,6 +124,9 @@ mp_obj_t machine_i2c_make_new(const mp_obj_type_t *type, size_t n_args, size_t n LPI2C_MasterGetDefaultConfig(self->master_config); // Initialise the I2C peripheral. self->master_config->baudRate_Hz = args[ARG_freq].u_int; + if (args[ARG_timeout].u_int >= 0) { + self->master_config->pinLowTimeout_ns = args[ARG_timeout].u_int * 1000; // to be set as ns + } LPI2C_MasterInit(self->i2c_inst, self->master_config, BOARD_BOOTCLOCKRUN_LPI2C_CLK_ROOT); return MP_OBJ_FROM_PTR(self); |