/**
* @brief Deactivates the I2C peripheral.
*
* @param[in] i2cp pointer to the @p I2CDriver object
*
* @notapi
*/
void i2c_lld_stop(I2CDriver *i2cp) {
/* If not in stopped state then disables the I2C clock.*/
if (i2cp->state != I2C_STOP) {
/* I2C disable.*/
i2c_lld_abort_operation(i2cp);
dmaStreamRelease(i2cp->dmatx);
dmaStreamRelease(i2cp->dmarx);
#if STM32_I2C_USE_I2C1
if (&I2CD1 == i2cp) {
nvicDisableVector(I2C1_EV_IRQn);
nvicDisableVector(I2C1_ER_IRQn);
rccDisableI2C1(FALSE);
}
#endif
#if STM32_I2C_USE_I2C2
if (&I2CD2 == i2cp) {
nvicDisableVector(I2C2_EV_IRQn);
nvicDisableVector(I2C2_ER_IRQn);
rccDisableI2C2(FALSE);
}
#endif
#if STM32_I2C_USE_I2C3
if (&I2CD3 == i2cp) {
nvicDisableVector(I2C3_EV_IRQn);
nvicDisableVector(I2C3_ER_IRQn);
rccDisableI2C3(FALSE);
}
#endif
}
}
/**
* @brief Handling of stalled I2C transactions.
*
* @param[in] i2cp pointer to the @p I2CDriver object
*
* @notapi
*/
static void i2c_lld_safety_timeout(void *p) {
I2CDriver *i2cp = (I2CDriver *)p;
if (i2cp->thread) {
i2c_lld_abort_operation(i2cp);
i2cp->thread->p_u.rdymsg = RDY_TIMEOUT;
chSchReadyI(i2cp->thread);
}
}
/**
* @brief Handling of stalled I2C transactions.
*
* @param[in] i2cp pointer to the @p I2CDriver object
*
* @notapi
*/
static void i2c_lld_safety_timeout(void *p) {
I2CDriver *i2cp = (I2CDriver *)p;
chSysLockFromIsr();
if (i2cp->thread) {
Thread *tp = i2cp->thread;
i2c_lld_abort_operation(i2cp);
i2cp->thread = NULL;
tp->p_u.rdymsg = RDY_TIMEOUT;
chSchReadyI(tp);
}
chSysUnlockFromIsr();
}
/**
* @brief Deactivates the I2C peripheral.
*
* @param[in] i2cp pointer to the @p I2CDriver object
*
* @notapi
*/
void i2c_lld_stop(I2CDriver *i2cp) {
/* If not in stopped state then disables the I2C clock.*/
if (i2cp->state != I2C_STOP) {
/* I2C disable.*/
i2c_lld_abort_operation(i2cp);
#if STM32_I2C_USE_DMA == TRUE
dmaStreamRelease(i2cp->dmatx);
dmaStreamRelease(i2cp->dmarx);
#endif
#if STM32_I2C_USE_I2C1
if (&I2CD1 == i2cp) {
#if defined(STM32_I2C1_GLOBAL_NUMBER) || defined(__DOXYGEN__)
nvicDisableVector(STM32_I2C1_GLOBAL_NUMBER);
#elif defined(STM32_I2C1_EVENT_NUMBER) && defined(STM32_I2C1_ERROR_NUMBER)
nvicDisableVector(STM32_I2C1_EVENT_NUMBER);
nvicDisableVector(STM32_I2C1_ERROR_NUMBER);
#else
#error "I2C1 interrupt numbers not defined"
#endif
rccDisableI2C1(FALSE);
}
#endif
#if STM32_I2C_USE_I2C2
if (&I2CD2 == i2cp) {
#if defined(STM32_I2C2_GLOBAL_NUMBER) || defined(__DOXYGEN__)
nvicDisableVector(STM32_I2C2_GLOBAL_NUMBER);
#elif defined(STM32_I2C2_EVENT_NUMBER) && defined(STM32_I2C2_ERROR_NUMBER)
nvicDisableVector(STM32_I2C2_EVENT_NUMBER);
nvicDisableVector(STM32_I2C2_ERROR_NUMBER);
#else
#error "I2C2 interrupt numbers not defined"
#endif
rccDisableI2C2(FALSE);
}
#endif
}
}