diff options
Diffstat (limited to 'ports/stm32/i2c.c')
| -rw-r--r-- | ports/stm32/i2c.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/ports/stm32/i2c.c b/ports/stm32/i2c.c index cb5ec56cb..65271b352 100644 --- a/ports/stm32/i2c.c +++ b/ports/stm32/i2c.c @@ -269,11 +269,18 @@ int i2c_write(i2c_t *i2c, const uint8_t *src, size_t len, size_t next_len) { return num_acks; } -#elif defined(STM32F0) || defined(STM32F7) || defined(STM32H7) +#elif defined(STM32F0) || defined(STM32F7) || defined(STM32H7) || defined(STM32L4) #if defined(STM32H7) #define APB1ENR APB1LENR #define RCC_APB1ENR_I2C1EN RCC_APB1LENR_I2C1EN +#elif defined(STM32L4) +#define APB1ENR APB1ENR1 +#define RCC_APB1ENR_I2C1EN RCC_APB1ENR1_I2C1EN +#if defined(STM32L432xx) +// Not a real peripheral, only needed for i2c_id calculation in i2c_init. +#define I2C2_BASE (APB1PERIPH_BASE + 0x5800UL) +#endif #endif STATIC uint16_t i2c_timeout_ms[MICROPY_HW_MAX_I2C]; @@ -303,6 +310,18 @@ int i2c_init(i2c_t *i2c, mp_hal_pin_obj_t scl, mp_hal_pin_obj_t sda, uint32_t fr i2c->OAR1 = 0; i2c->OAR2 = 0; + #if defined(STM32L4) + // These timing values are with f_I2CCLK=80MHz and are only approximate + if (freq >= 1000000) { + i2c->TIMINGR = 0x00300F33; + } else if (freq >= 400000) { + i2c->TIMINGR = 0x00702991; + } else if (freq >= 100000) { + i2c->TIMINGR = 0x10909CEC; + } else { + return -MP_EINVAL; + } + #else // These timing values are for f_I2CCLK=54MHz and are only approximate if (freq >= 1000000) { i2c->TIMINGR = 0x50100103; @@ -313,6 +332,7 @@ int i2c_init(i2c_t *i2c, mp_hal_pin_obj_t scl, mp_hal_pin_obj_t sda, uint32_t fr } else { return -MP_EINVAL; } + #endif i2c->TIMEOUTR = 0; |