/**
* @brief Low level serial driver stop.
* @details De-initializes the USART, stops the associated clock, resets the
* interrupt vector.
*
* @param[in] sdp pointer to a @p SerialDriver object
*
* @notapi
*/
void sd_lld_stop(SerialDriver *sdp) {
if (sdp->state == SD_READY) {
usart_deinit(sdp->usart);
#if USE_SAM7_USART0
if (&SD1 == sdp) {
AT91C_BASE_PMC->PMC_PCDR = (1 << AT91C_ID_US0);
AIC_DisableIT(AT91C_ID_US0);
return;
}
#endif
#if USE_SAM7_USART1
if (&SD2 == sdp) {
AT91C_BASE_PMC->PMC_PCDR = (1 << AT91C_ID_US1);
AIC_DisableIT(AT91C_ID_US1);
return;
}
#endif
#if USE_SAM7_DBGU_UART
if (&SD3 == sdp) {
AT91C_BASE_DBGU->DBGU_IDR = 0xFFFFFFFF;
return;
}
#endif
}
}
/** Initialize the USART peripheral.
*
* @param obj_s The serial object
*/
static void usart_init(struct serial_s *obj_s)
{
if (obj_s->index >= USART_NUM) {
return;
}
/* USART configuration */
usart_deinit(obj_s->uart);
usart_word_length_set(obj_s->uart, obj_s->databits);
usart_baudrate_set(obj_s->uart, obj_s->baudrate);
usart_stop_bit_set(obj_s->uart, obj_s->stopbits);
usart_parity_config(obj_s->uart, obj_s->parity);
#if DEVICE_SERIAL_FC
if (obj_s->hw_flow_ctl == USART_HWCONTROL_NONE) {
usart_hardware_flow_cts_config(obj_s->uart, USART_CTS_DISABLE);
usart_hardware_flow_rts_config(obj_s->uart, USART_RTS_DISABLE);
} else if (obj_s->hw_flow_ctl == USART_HWCONTROL_RTS) {
usart_hardware_flow_cts_config(obj_s->uart, USART_CTS_DISABLE);
usart_hardware_flow_rts_config(obj_s->uart, USART_RTS_ENABLE);
} else if (obj_s->hw_flow_ctl == USART_HWCONTROL_CTS) {
usart_hardware_flow_cts_config(obj_s->uart, USART_CTS_ENABLE);
usart_hardware_flow_rts_config(obj_s->uart, USART_RTS_DISABLE);
} else if (obj_s->hw_flow_ctl == USART_HWCONTROL_RTS_CTS) {
usart_hardware_flow_cts_config(obj_s->uart, USART_CTS_ENABLE);
usart_hardware_flow_rts_config(obj_s->uart, USART_RTS_ENABLE);
}
#endif /* DEVICE_SERIAL_FC */
usart_receive_config(obj_s->uart, USART_RECEIVE_ENABLE);
usart_transmit_config(obj_s->uart, USART_TRANSMIT_ENABLE);
usart_enable(obj_s->uart);
}
/**
* @brief Low level serial driver stop.
* @details De-initializes the USART, stops the associated clock, resets the
* interrupt vector.
*
* @param[in] sdp pointer to a @p SerialDriver object
*
* @notapi
*/
void sd_lld_stop(SerialDriver *sdp) {
if (sdp->state == SD_READY) {
/* UART is de-initialized then clocks are disabled.*/
usart_deinit(sdp->usart);
#if STM32_SERIAL_USE_USART1
if (&SD1 == sdp) {
rccDisableUSART1(FALSE);
return;
}
#endif
#if STM32_SERIAL_USE_USART2
if (&SD2 == sdp) {
rccDisableUSART2(FALSE);
return;
}
#endif
#if STM32_SERIAL_USE_USART3
if (&SD3 == sdp) {
rccDisableUSART3(FALSE);
return;
}
#endif
#if STM32_SERIAL_USE_UART4
if (&SD4 == sdp) {
rccDisableUART4(FALSE);
return;
}
#endif
#if STM32_SERIAL_USE_UART5
if (&SD5 == sdp) {
rccDisableUART5(FALSE);
return;
}
#endif
#if STM32_SERIAL_USE_USART6
if (&SD6 == sdp) {
rccDisableUSART6(FALSE);
return;
}
#endif
#if STM32_SERIAL_USE_UART7
if (&SD7 == sdp) {
rccDisableUART7(FALSE);
return;
}
#endif
#if STM32_SERIAL_USE_UART8
if (&SD8 == sdp) {
rccDisableUART8(FALSE);
return;
}
#endif
}
}
/** Release the serial peripheral, not currently invoked. It requires further
* resource management.
*
* @param obj The serial object
*/
void serial_free(serial_t *obj)
{
struct serial_s *p_obj = GET_SERIAL_S(obj);
rcu_periph_enum rcu_periph = usart_clk[p_obj->index];
/* reset USART and disable clock */
usart_deinit(p_obj->uart);
rcu_periph_clock_disable(rcu_periph);
serial_irq_ids[p_obj->index] = 0;
/* reset the GPIO state */
pin_function(p_obj->pin_tx, MODE_IN_FLOATING);
pin_function(p_obj->pin_rx, MODE_IN_FLOATING);
}
/**
* @brief Low level serial driver stop.
* @details De-initializes the USART, stops the associated clock, resets the
* interrupt vector.
*
* @param[in] sdp pointer to a @p SerialDriver object
*
* @notapi
*/
void sd_lld_stop(SerialDriver *sdp) {
if (sdp->state == SD_READY) {
usart_deinit(sdp->usart);
#if STM32_SERIAL_USE_USART1
if (&SD1 == sdp) {
rccDisableUSART1(FALSE);
nvicDisableVector(STM32_USART1_NUMBER);
return;
}
#endif
#if STM32_SERIAL_USE_USART2
if (&SD2 == sdp) {
rccDisableUSART2(FALSE);
nvicDisableVector(STM32_USART2_NUMBER);
return;
}
#endif
#if STM32_SERIAL_USE_USART3
if (&SD3 == sdp) {
rccDisableUSART3(FALSE);
nvicDisableVector(STM32_USART3_NUMBER);
return;
}
#endif
#if STM32_SERIAL_USE_UART4
if (&SD4 == sdp) {
rccDisableUART4(FALSE);
nvicDisableVector(STM32_UART4_NUMBER);
return;
}
#endif
#if STM32_SERIAL_USE_UART5
if (&SD5 == sdp) {
rccDisableUART5(FALSE);
nvicDisableVector(STM32_UART5_NUMBER);
return;
}
#endif
#if STM32_SERIAL_USE_USART6
if (&SD6 == sdp) {
rccDisableUSART6(FALSE);
nvicDisableVector(STM32_USART6_NUMBER);
return;
}
#endif
}
}
