diff options
| -rw-r--r-- | docs/library/machine.I2C.rst | 2 | ||||
| -rw-r--r-- | extmod/machine_i2c.c | 4 |
2 files changed, 4 insertions, 2 deletions
diff --git a/docs/library/machine.I2C.rst b/docs/library/machine.I2C.rst index f46d64ef5..82a88390c 100644 --- a/docs/library/machine.I2C.rst +++ b/docs/library/machine.I2C.rst @@ -57,7 +57,7 @@ Constructors of *scl* and *sda* that cannot be changed. .. _machine.SoftI2C: -.. class:: SoftI2C(scl, sda, *, freq=400000, timeout=255) +.. class:: SoftI2C(scl, sda, *, freq=400000, timeout=50000) Construct a new software I2C object. The parameters are: diff --git a/extmod/machine_i2c.c b/extmod/machine_i2c.c index b2e39c534..2b1275e5b 100644 --- a/extmod/machine_i2c.c +++ b/extmod/machine_i2c.c @@ -33,6 +33,8 @@ #include "py/runtime.h" #include "extmod/machine_i2c.h" +#define SOFT_I2C_DEFAULT_TIMEOUT_US (50000) // 50ms + #if MICROPY_PY_MACHINE_SOFTI2C typedef mp_machine_soft_i2c_obj_t machine_i2c_obj_t; @@ -651,7 +653,7 @@ STATIC void mp_machine_soft_i2c_init(mp_obj_base_t *self_in, size_t n_args, cons { MP_QSTR_scl, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} }, { MP_QSTR_sda, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} }, { MP_QSTR_freq, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 400000} }, - { MP_QSTR_timeout, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 255} }, + { MP_QSTR_timeout, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = SOFT_I2C_DEFAULT_TIMEOUT_US} }, }; mp_machine_soft_i2c_obj_t *self = (mp_machine_soft_i2c_obj_t *)self_in; |