diff options
| author | Damien George <damien.p.george@gmail.com> | 2018-04-24 17:34:42 +1000 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2018-04-24 23:48:04 +1000 |
| commit | 9254f365d67ce58b4e90999fff314513a6c2413b (patch) | |
| tree | 19d94ac6d2e380ea39b2fadb4b4b24ee9a11e302 | |
| parent | 19778d0a3c8e819fd7e7408cf9081b25911f8a3c (diff) | |
stm32/machine_i2c: Provide hardware I2C for machine.I2C on F7 MCUs.
| -rw-r--r-- | ports/stm32/machine_i2c.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/ports/stm32/machine_i2c.c b/ports/stm32/machine_i2c.c index 54e842571..17d3f3ef4 100644 --- a/ports/stm32/machine_i2c.c +++ b/ports/stm32/machine_i2c.c @@ -416,6 +416,66 @@ timeout: return -MP_ETIMEDOUT; } +#elif defined(STM32F7) + +typedef struct _machine_hard_i2c_obj_t { + mp_obj_base_t base; + i2c_t *i2c; + mp_hal_pin_obj_t scl; + mp_hal_pin_obj_t sda; +} machine_hard_i2c_obj_t; + +STATIC const machine_hard_i2c_obj_t machine_hard_i2c_obj[] = { + #if defined(MICROPY_HW_I2C1_SCL) + {{&machine_hard_i2c_type}, I2C1, MICROPY_HW_I2C1_SCL, MICROPY_HW_I2C1_SDA}, + #else + {{NULL}, NULL, NULL, NULL}, + #endif + #if defined(MICROPY_HW_I2C2_SCL) + {{&machine_hard_i2c_type}, I2C2, MICROPY_HW_I2C2_SCL, MICROPY_HW_I2C2_SDA}, + #else + {{NULL}, NULL, NULL, NULL}, + #endif + #if defined(MICROPY_HW_I2C3_SCL) + {{&machine_hard_i2c_type}, I2C3, MICROPY_HW_I2C3_SCL, MICROPY_HW_I2C3_SDA}, + #else + {{NULL}, NULL, NULL, NULL}, + #endif + #if defined(MICROPY_HW_I2C4_SCL) + {{&machine_hard_i2c_type}, I2C4, MICROPY_HW_I2C4_SCL, MICROPY_HW_I2C4_SDA}, + #else + {{NULL}, NULL, NULL, NULL}, + #endif +}; + +STATIC void machine_hard_i2c_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) { + machine_hard_i2c_obj_t *self = MP_OBJ_TO_PTR(self_in); + uint32_t timingr = self->i2c->TIMINGR; + uint32_t presc = timingr >> 28; + uint32_t sclh = timingr >> 8 & 0xff; + uint32_t scll = timingr & 0xff; + uint32_t freq = HAL_RCC_GetPCLK1Freq() / (presc + 1) / (sclh + scll + 2); + mp_printf(print, "I2C(%u, scl=%q, sda=%q, freq=%u, timingr=0x%08x)", + self - &machine_hard_i2c_obj[0] + 1, + mp_hal_pin_name(self->scl), mp_hal_pin_name(self->sda), + freq, timingr); +} + +void machine_hard_i2c_init(machine_hard_i2c_obj_t *self, uint32_t freq, uint32_t timeout) { + (void)timeout; + i2c_init(self->i2c, self->scl, self->sda, freq); +} + +int machine_hard_i2c_readfrom(mp_obj_base_t *self_in, uint16_t addr, uint8_t *dest, size_t len, bool stop) { + machine_hard_i2c_obj_t *self = MP_OBJ_TO_PTR(self_in); + return i2c_readfrom(self->i2c, addr, dest, len, stop); +} + +int machine_hard_i2c_writeto(mp_obj_base_t *self_in, uint16_t addr, const uint8_t *src, size_t len, bool stop) { + machine_hard_i2c_obj_t *self = MP_OBJ_TO_PTR(self_in); + return i2c_writeto(self->i2c, addr, src, len, stop); +} + #else // No hardware I2C driver for this MCU so use the software implementation |