diff options
Diffstat (limited to 'os/hal/platforms/STM32/i2c_lld.h')
| -rw-r--r-- | os/hal/platforms/STM32/i2c_lld.h | 105 |
1 files changed, 100 insertions, 5 deletions
diff --git a/os/hal/platforms/STM32/i2c_lld.h b/os/hal/platforms/STM32/i2c_lld.h index 378b3a335..db0704066 100644 --- a/os/hal/platforms/STM32/i2c_lld.h +++ b/os/hal/platforms/STM32/i2c_lld.h @@ -239,6 +239,11 @@ /*===========================================================================*/ /** + * @brief Type representing I2C address. + */ +typedef uint16_t i2caddr_t; + +/** * @brief I2C Driver condition flags type. */ typedef uint32_t i2cflags_t; @@ -307,7 +312,7 @@ struct I2CDriver{ __IO i2cflags_t errors; /*!< @brief Error flags.*/ - uint8_t slave_addr; /*!< @brief Current slave address without R/W bit. */ + i2caddr_t slave_addr; /*!< @brief Current slave address without R/W bit. */ /*********** End of the mandatory fields. **********************************/ @@ -330,6 +335,90 @@ struct I2CDriver{ while(i2cp->id_i2c->SR2 & I2C_SR2_BUSY) \ ; \ } +/** + * @brief Waits for operation completion. + * @details This function waits for the driver to complete the current + * operation. + * @pre An operation must be running while the function is invoked. + * @note No more than one thread can wait on a I2C driver using + * this function. + * + * @param[in] i2cp pointer to the @p I2CDriver object + * + * @notapi + */ +#define i2c_lld_wait_s(i2cp, timeout, rdymsg) { \ + chDbgAssert((i2cp)->id_thread == NULL, \ + "_i2c_wait(), #1", "already waiting"); \ + chSysLock(); /* this lock will be disarmed in high level part */ \ + (i2cp)->id_thread = chThdSelf(); \ + rdymsg = chSchGoSleepTimeoutS(THD_STATE_SUSPENDED, timeout); \ +} + +/** + * @brief Wakes up the waiting thread. + * + * @param[in] i2cp pointer to the @p I2CDriver object + * + * @notapi + */ +#define i2c_lld_wakeup_isr(i2cp) { \ + if ((i2cp)->id_thread != NULL) { \ + Thread *tp = (i2cp)->id_thread; \ + (i2cp)->id_thread = NULL; \ + chSysLockFromIsr(); \ + chSchReadyI(tp); \ + chSysUnlockFromIsr(); \ + } \ +} + +/** + * @brief Wakes up the waiting thread in case of errors. + * + * @param[in] i2cp pointer to the @p I2CDriver object + * + * @notapi + */ +#define i2c_lld_error_wakeup_isr(i2cp) { \ + if ((i2cp)->id_thread != NULL) { \ + Thread *tp = (i2cp)->id_thread; \ + (i2cp)->id_thread = NULL; \ + chSysLockFromIsr(); \ + chSchReadyI(tp); \ + chSysUnlockFromIsr(); \ + } \ +} + +/** + * @brief Common ISR code. + * + * @param[in] i2cp pointer to the @p I2CDriver object + * + * @notapi + */ +#define i2c_lld_isr_code(i2cp) { \ + i2c_lld_wakeup_isr(i2cp); \ +} + +/** + * @brief Error ISR code. + * + * @param[in] i2cp pointer to the @p I2CDriver object + * + * @notapi + */ +#define i2c_lld_isr_err_code(i2cp) { \ + i2c_lld_error_wakeup_isr(i2cp); \ +} + +/** + * @brief Get errors from I2C driver. + * + * @param[in] i2cp pointer to the @p I2CDriver object + * + * @notapi + */ +#define i2c_lld_get_errors(i2cp) ((i2cp)->errors) /*===========================================================================*/ /* External declarations. */ @@ -358,10 +447,16 @@ void i2c_lld_set_clock(I2CDriver *i2cp); void i2c_lld_set_opmode(I2CDriver *i2cp); void i2c_lld_start(I2CDriver *i2cp); void i2c_lld_stop(I2CDriver *i2cp); -void i2c_lld_master_transmit(I2CDriver *i2cp, uint8_t slave_addr, - uint8_t *txbuf, size_t txbytes, uint8_t *rxbuf, size_t rxbytes); -void i2c_lld_master_receive(I2CDriver *i2cp, uint8_t slave_addr, - uint8_t *rxbuf, size_t rxbytes); +msg_t i2c_lld_master_transmit_timeout(I2CDriver *i2cp, uint8_t slave_addr, + uint8_t *txbuf, size_t txbytes, + uint8_t *rxbuf, size_t rxbytes, + systime_t timeout); +msg_t i2c_lld_master_receive_timeout(I2CDriver *i2cp, + uint8_t slave_addr, + uint8_t *rxbuf, + size_t rxbytes, + systime_t timeout); +void i2c_lld_master_transceive(I2CDriver *i2cp); #ifdef __cplusplus } |