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cpu/efm32/i2c: add series 2 support

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Jue 2022-10-18 12:13:57 +02:00
parent 2c2790dde2
commit 53e444ebc7
2 changed files with 16 additions and 0 deletions
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2
cpu/efm32/include/periph_cpu.h
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@ -282,7 +282,9 @@ typedef struct {
I2C_TypeDef *dev; /**< USART device used */
gpio_t sda_pin; /**< pin used for SDA */
gpio_t scl_pin; /**< pin used for SCL */
#if defined(_SILICON_LABS_32B_SERIES_0) || defined(_SILICON_LABS_32B_SERIES_1)
uint32_t loc; /**< location of I2C pins */
#endif
CMU_Clock_TypeDef cmu; /**< the device CMU channel */
IRQn_Type irq; /**< the devices base IRQ channel */
uint32_t speed; /**< the bus speed */

14
cpu/efm32/periph/i2c.c
View File

@ -94,6 +94,9 @@ static int _transfer(i2c_t dev, I2C_TransferSeq_TypeDef *transfer)
}
}
#define GET_PIN(x) (x & 0xf)
#define GET_PORT(x) (x >> 4)
void i2c_init(i2c_t dev)
{
/* check if device is valid */
@ -103,7 +106,9 @@ void i2c_init(i2c_t dev)
mutex_init(&i2c_lock[dev]);
/* enable clocks */
#if defined(_SILICON_LABS_32B_SERIES_0) || defined(_SILICON_LABS_32B_SERIES_1)
CMU_ClockEnable(cmuClock_HFPER, true);
#endif
CMU_ClockEnable(i2c_config[dev].cmu, true);
/* configure the pins */
@ -132,6 +137,15 @@ void i2c_init(i2c_t dev)
#elif defined(_SILICON_LABS_32B_SERIES_1)
i2c_config[dev].dev->ROUTEPEN = I2C_ROUTEPEN_SDAPEN | I2C_ROUTEPEN_SCLPEN;
i2c_config[dev].dev->ROUTELOC0 = i2c_config[dev].loc;
#else
GPIO->I2CROUTE[I2C_NUM(i2c_config[dev].dev)].SCLROUTE =
(GET_PORT(i2c_config[dev].scl_pin) << _GPIO_I2C_SCLROUTE_PORT_SHIFT) |
(GET_PIN(i2c_config[dev].scl_pin) << _GPIO_I2C_SCLROUTE_PIN_SHIFT);
GPIO->I2CROUTE[I2C_NUM(i2c_config[dev].dev)].SDAROUTE =
(GET_PORT(i2c_config[dev].sda_pin) << _GPIO_I2C_SDAROUTE_PORT_SHIFT) |
(GET_PIN(i2c_config[dev].sda_pin) << _GPIO_I2C_SDAROUTE_PIN_SHIFT);
GPIO->I2CROUTE[I2C_NUM(i2c_config[dev].dev)].ROUTEEN =
(GPIO_I2C_ROUTEEN_SCLPEN | GPIO_I2C_ROUTEEN_SDAPEN);
#endif
/* enable interrupts */