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AT32F435_437_Firmware_Library
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AT32F435_437_Firmware_Library/libraries/drivers/src/at32f435_437_usart.c

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/**
**************************************************************************
* @file at32f435_437_usart.c
* @version v2.0.9
* @date 2022-06-28
* @brief contains all the functions for the usart firmware library
**************************************************************************
* Copyright notice & Disclaimer
*
* The software Board Support Package (BSP) that is made available to
* download from Artery official website is the copyrighted work of Artery.
* Artery authorizes customers to use, copy, and distribute the BSP
* software and its related documentation for the purpose of design and
* development in conjunction with Artery microcontrollers. Use of the
* software is governed by this copyright notice and the following disclaimer.
*
* THIS SOFTWARE IS PROVIDED ON "AS IS" BASIS WITHOUT WARRANTIES,
* GUARANTEES OR REPRESENTATIONS OF ANY KIND. ARTERY EXPRESSLY DISCLAIMS,
* TO THE FULLEST EXTENT PERMITTED BY LAW, ALL EXPRESS, IMPLIED OR
* STATUTORY OR OTHER WARRANTIES, GUARANTEES OR REPRESENTATIONS,
* INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
*
**************************************************************************
*/
/* includes ------------------------------------------------------------------*/
#include "at32f435_437_conf.h"
/** @addtogroup AT32F435_437_periph_driver
* @{
*/
/** @defgroup USART
* @brief USART driver modules
* @{
*/
#ifdef USART_MODULE_ENABLED
/** @defgroup USART_private_functions
* @{
*/
/**
* @brief deinitialize the usart peripheral registers to their default reset values.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7,or UART8.
* @retval none
*/
void usart_reset(usart_type* usart_x)
{
if(usart_x == USART1)
{
crm_periph_reset(CRM_USART1_PERIPH_RESET, TRUE);
crm_periph_reset(CRM_USART1_PERIPH_RESET, FALSE);
}
else if(usart_x == USART2)
{
crm_periph_reset(CRM_USART2_PERIPH_RESET, TRUE);
crm_periph_reset(CRM_USART2_PERIPH_RESET, FALSE);
}
else if(usart_x == USART3)
{
crm_periph_reset(CRM_USART3_PERIPH_RESET, TRUE);
crm_periph_reset(CRM_USART3_PERIPH_RESET, FALSE);
}
else if(usart_x == UART4)
{
crm_periph_reset(CRM_UART4_PERIPH_RESET, TRUE);
crm_periph_reset(CRM_UART4_PERIPH_RESET, FALSE);
}
else if(usart_x == UART5)
{
crm_periph_reset(CRM_UART5_PERIPH_RESET, TRUE);
crm_periph_reset(CRM_UART5_PERIPH_RESET, FALSE);
}
else if(usart_x == USART6)
{
crm_periph_reset(CRM_USART6_PERIPH_RESET, TRUE);
crm_periph_reset(CRM_USART6_PERIPH_RESET, FALSE);
}
else if(usart_x == UART7)
{
crm_periph_reset(CRM_UART7_PERIPH_RESET, TRUE);
crm_periph_reset(CRM_UART7_PERIPH_RESET, FALSE);
}
else if(usart_x == UART8)
{
crm_periph_reset(CRM_UART8_PERIPH_RESET, TRUE);
crm_periph_reset(CRM_UART8_PERIPH_RESET, FALSE);
}
}
/**
* @brief initialize the usart peripheral according to the specified parameters.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4 ,UART5, USART6, UART7 or UART8.
* @param baud_rate: configure the usart communication baud rate.
* @param data_bit: data bits transmitted or received in a frame
* this parameter can be one of the following values:
* - USART_DATA_7BITS
* - USART_DATA_8BITS
* - USART_DATA_9BITS.
* @param stop_bit: stop bits transmitted
* this parameter can be one of the following values:
* - USART_STOP_1_BIT
* - USART_STOP_0_5_BIT.
* - USART_STOP_2_BIT
* - USART_STOP_1_5_BIT.
* @retval none
*/
void usart_init(usart_type* usart_x, uint32_t baud_rate, usart_data_bit_num_type data_bit, usart_stop_bit_num_type stop_bit)
{
crm_clocks_freq_type clocks_freq;
uint32_t apb_clock, temp_val;
crm_clocks_freq_get(&clocks_freq);
if((usart_x == USART1) || (usart_x == USART6))
{
apb_clock = clocks_freq.apb2_freq;
}
else
{
apb_clock = clocks_freq.apb1_freq;
}
temp_val = (apb_clock * 10 / baud_rate);
if((temp_val % 10) < 5)
{
temp_val = (temp_val / 10);
}
else
{
temp_val = (temp_val / 10) + 1;
}
usart_x->baudr_bit.div = temp_val;
if(data_bit == USART_DATA_7BITS)
{
usart_x->ctrl1_bit.dbn_h = 1;
usart_x->ctrl1_bit.dbn_l = 0;
}
else if(data_bit == USART_DATA_8BITS)
{
usart_x->ctrl1_bit.dbn_h = 0;
usart_x->ctrl1_bit.dbn_l = 0;
}
else
{
usart_x->ctrl1_bit.dbn_h = 0;
usart_x->ctrl1_bit.dbn_l = 1;
}
usart_x->ctrl2_bit.stopbn = stop_bit;
}
/**
* @brief usart parity selection config.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4 ,UART5, USART6, UART7 or UART8.
* @param parity: select the none, odd or even parity.
* this parameter can be one of the following values:
* - USART_PARITY_NONE
* - USART_PARITY_EVEN.
* - USART_PARITY_ODD
* @retval none
*/
void usart_parity_selection_config(usart_type* usart_x, usart_parity_selection_type parity)
{
if(parity == USART_PARITY_NONE)
{
usart_x->ctrl1_bit.psel = FALSE;
usart_x->ctrl1_bit.pen = FALSE;
}
else if(parity == USART_PARITY_EVEN)
{
usart_x->ctrl1_bit.psel = FALSE;
usart_x->ctrl1_bit.pen = TRUE;
}
else if(parity == USART_PARITY_ODD)
{
usart_x->ctrl1_bit.psel = TRUE;
usart_x->ctrl1_bit.pen = TRUE;
}
}
/**
* @brief enable or disable the specified usart peripheral.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7 or UART8.
* @param new_state: new state of the usart peripheral.
* this parameter can be: TRUE or FALSE.
* @retval none
*/
void usart_enable(usart_type* usart_x, confirm_state new_state)
{
usart_x->ctrl1_bit.uen = new_state;
}
/**
* @brief usart transmitter enable.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4 ,UART5, USART6, UART7 or UART8.
* @param new_state: TRUE or FALSE.
* @retval none
*/
void usart_transmitter_enable(usart_type* usart_x, confirm_state new_state)
{
usart_x->ctrl1_bit.ten = new_state;
}
/**
* @brief usart receiver enable.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4 ,UART5, USART6, UART7 or UART8.
* @param new_state: TRUE or FALSE.
* @retval none
*/
void usart_receiver_enable(usart_type* usart_x, confirm_state new_state)
{
usart_x->ctrl1_bit.ren = new_state;
}
/**
* @brief usart clock config.
* @note clock config are not available for UART4, UART5, UART7 and UART8.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3 or USART6.
* @param clk_pol: polarity of the clock output on the ck pin.
* this parameter can be one of the following values:
* - USART_CLOCK_POLARITY_LOW
* - USART_CLOCK_POLARITY_HIGH
* @param clk_pha: phase of the clock output on the ck pin.
* this parameter can be one of the following values:
* - USART_CLOCK_PHASE_1EDGE
* - USART_CLOCK_PHASE_2EDGE
* @param clk_lb: whether the clock pulse of the last data bit transmitted (MSB) is outputted on the ck pin.
* this parameter can be one of the following values:
* - USART_CLOCK_LAST_BIT_NONE
* - USART_CLOCK_LAST_BIT_OUTPUT
* @retval none
*/
void usart_clock_config(usart_type* usart_x, usart_clock_polarity_type clk_pol, usart_clock_phase_type clk_pha, usart_lbcp_type clk_lb)
{
usart_x->ctrl2_bit.clkpol = clk_pol;
usart_x->ctrl2_bit.clkpha = clk_pha;
usart_x->ctrl2_bit.lbcp = clk_lb;
}
/**
* @brief usart enable the ck pin.
* @note clock enable are not available for UART4, UART5, UART7 and UART8.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3 or USART6.
* @param new_state: TRUE or FALSE
* @retval none
*/
void usart_clock_enable(usart_type* usart_x, confirm_state new_state)
{
usart_x->ctrl2_bit.clken = new_state;
}
/**
* @brief enable or disable the specified usart interrupts.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7 or UART8.
* @param usart_int: specifies the USART interrupt sources to be enabled or disabled.
* this parameter can be one of the following values:
* - USART_IDLE_INT: idle interrupt
* - USART_RDBF_INT: rdbf interrupt
* - USART_TDC_INT: tdc interrupt
* - USART_TDBE_INT: tdbe interrupt
* - USART_PERR_INT: perr interrupt
* - USART_BF_INT: break frame interrupt
* - USART_ERR_INT: err interrupt
* - USART_CTSCF_INT: ctscf interrupt
* @param new_state: new state of the specified usart interrupts.
* this parameter can be: TRUE or FALSE.
* @retval none
*/
void usart_interrupt_enable(usart_type* usart_x, uint32_t usart_int, confirm_state new_state)
{
if(new_state == TRUE)
PERIPH_REG((uint32_t)usart_x, usart_int) |= PERIPH_REG_BIT(usart_int);
else
PERIPH_REG((uint32_t)usart_x, usart_int) &= ~PERIPH_REG_BIT(usart_int);
}
/**
* @brief enable or disable the usart's dma transmitter interface.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7 or UART8.
* @param new_state: new state of the dma request sources.
* this parameter can be: TRUE or FALSE.
* @retval none
*/
void usart_dma_transmitter_enable(usart_type* usart_x, confirm_state new_state)
{
usart_x->ctrl3_bit.dmaten = new_state;
}
/**
* @brief enable or disable the usart's dma receiver interface.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7 or UART8.
* @param new_state: new state of the dma request sources.
* this parameter can be: TRUE or FALSE.
* @retval none
*/
void usart_dma_receiver_enable(usart_type* usart_x, confirm_state new_state)
{
usart_x->ctrl3_bit.dmaren = new_state;
}
/**
* @brief set the wakeup id of the usart.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7 or UART8.
* @param usart_id: the matching id(0x0~0xFF).
* @retval none
*/
void usart_wakeup_id_set(usart_type* usart_x, uint8_t usart_id)
{
if(usart_x->ctrl2_bit.idbn == USART_ID_FIXED_4_BIT)
{
usart_x->ctrl2_bit.id_l = (usart_id & 0x0F);
usart_x->ctrl2_bit.id_h = 0;
}
else
{
usart_x->ctrl2_bit.id_l = (usart_id & 0x0F);
usart_x->ctrl2_bit.id_h = ((usart_id & 0xF0) >> 4);
}
}
/**
* @brief select the usart wakeup method in multi-processor communication.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7 or UART8.
* @param wakeup_mode: determines the way to wake up usart method.
* this parameter can be one of the following values:
* - USART_WAKEUP_BY_IDLE_FRAME
* - USART_WAKEUP_BY_MATCHING_ID
* @retval none
*/
void usart_wakeup_mode_set(usart_type* usart_x, usart_wakeup_mode_type wakeup_mode)
{
usart_x->ctrl1_bit.wum = wakeup_mode;
}
/**
* @brief config the usart in mute mode in multi-processor communication.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7 or UART8.
* @param new_state: new state of the usart mute mode.
* this parameter can be: TRUE or FALSE.
* @retval none
*/
void usart_receiver_mute_enable(usart_type* usart_x, confirm_state new_state)
{
usart_x->ctrl1_bit.rm = new_state;
}
/**
* @brief set the usart break frame bit num.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7 or UART8.
* @param break_bit: specifies the break bit num.
* this parameter can be one of the following values:
* - USART_BREAK_10BITS
* - USART_BREAK_11BITS
* @retval none
*/
void usart_break_bit_num_set(usart_type* usart_x, usart_break_bit_num_type break_bit)
{
usart_x->ctrl2_bit.bfbn = break_bit;
}
/**
* @brief enable or disable the usart lin mode.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7 or UART8.
* @param new_state: new state of the usart lin mode.
* this parameter can be: TRUE or FALSE.
* @retval none
*/
void usart_lin_mode_enable(usart_type* usart_x, confirm_state new_state)
{
usart_x->ctrl2_bit.linen = new_state;
}
/**
* @brief transmit single data through the usart peripheral.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7 or UART8.
* @param data: the data to transmit.
* @retval none
*/
void usart_data_transmit(usart_type* usart_x, uint16_t data)
{
usart_x->dt = (data & 0x01FF);
}
/**
* @brief return the most recent received data by the usart peripheral.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7 or UART8.
* @retval the received data.
*/
uint16_t usart_data_receive(usart_type* usart_x)
{
return (uint16_t)(usart_x->dt);
}
/**
* @brief transmit break characters.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7 or UART8.
* @retval none
*/
void usart_break_send(usart_type* usart_x)
{
usart_x->ctrl1_bit.sbf = TRUE;
}
/**
* @brief config the specified usart smartcard guard time.
* @note The guard time bits are not available for UART4, UART5, UART7 or UART8.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3 or USART6.
* @param guard_time_val: specifies the guard time (0x00~0xFF).
* @retval none
*/
void usart_smartcard_guard_time_set(usart_type* usart_x, uint8_t guard_time_val)
{
usart_x->gdiv_bit.scgt = guard_time_val;
}
/**
* @brief config the irda/smartcard division.
* @note the division are not available for UART4, UART5, UART7 or UART8.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3 or USART6.
* @param div_val: specifies the division.
* @retval none
*/
void usart_irda_smartcard_division_set(usart_type* usart_x, uint8_t div_val)
{
usart_x->gdiv_bit.isdiv = div_val;
}
/**
* @brief enable or disable the usart smart card mode.
* @note the smart card mode are not available for UART4, UART5, UART7 or UART8.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3 or USART6.
* @param new_state: new state of the smart card mode.
* this parameter can be: TRUE or FALSE.
* @retval none
*/
void usart_smartcard_mode_enable(usart_type* usart_x, confirm_state new_state)
{
usart_x->ctrl3_bit.scmen = new_state;
}
/**
* @brief enable or disable nack transmission in smartcard mode.
* @note the smart card nack are not available for UART4, UART5, UART7 or UART8.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3 or USART6.
* @param new_state: new state of the nack transmission.
* this parameter can be: TRUE or FALSE.
* @retval none
*/
void usart_smartcard_nack_set(usart_type* usart_x, confirm_state new_state)
{
usart_x->ctrl3_bit.scnacken = new_state;
}
/**
* @brief enable or disable the usart single line bidirectional half-duplex communication.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7 or UART8.
* @param new_state: new state of the single line half-duplex select.
* this parameter can be: TRUE or FALSE.
* @retval none
*/
void usart_single_line_halfduplex_select(usart_type* usart_x, confirm_state new_state)
{
usart_x->ctrl3_bit.slben = new_state;
}
/**
* @brief enable or disable the usart's irda interface.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7 or UART8.
* @param new_state: new state of the irda mode.
* this parameter can be: TRUE or FALSE.
* @retval none
*/
void usart_irda_mode_enable(usart_type* usart_x, confirm_state new_state)
{
usart_x->ctrl3_bit.irdaen = new_state;
}
/**
* @brief configure the usart's irda low power.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7 or UART8.
* @param new_state: new state of the irda mode.
* this parameter can be: TRUE or FALSE.
* @retval none
*/
void usart_irda_low_power_enable(usart_type* usart_x, confirm_state new_state)
{
usart_x->ctrl3_bit.irdalp = new_state;
}
/**
* @brief configure the usart's hardware flow control.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3
* @param flow_state: specifies the hardware flow control.
* this parameter can be one of the following values:
* - USART_HARDWARE_FLOW_NONE
* - USART_HARDWARE_FLOW_RTS,
* - USART_HARDWARE_FLOW_CTS,
* - USART_HARDWARE_FLOW_RTS_CTS
* @retval none
*/
void usart_hardware_flow_control_set(usart_type* usart_x,usart_hardware_flow_control_type flow_state)
{
if(flow_state == USART_HARDWARE_FLOW_NONE)
{
usart_x->ctrl3_bit.rtsen = FALSE;
usart_x->ctrl3_bit.ctsen = FALSE;
}
else if(flow_state == USART_HARDWARE_FLOW_RTS)
{
usart_x->ctrl3_bit.rtsen = TRUE;
usart_x->ctrl3_bit.ctsen = FALSE;
}
else if(flow_state == USART_HARDWARE_FLOW_CTS)
{
usart_x->ctrl3_bit.rtsen = FALSE;
usart_x->ctrl3_bit.ctsen = TRUE;
}
else if(flow_state == USART_HARDWARE_FLOW_RTS_CTS)
{
usart_x->ctrl3_bit.rtsen = TRUE;
usart_x->ctrl3_bit.ctsen = TRUE;
}
}
/**
* @brief check whether the specified usart flag is set or not.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7 or UART8.
* @param flag: specifies the flag to check.
* this parameter can be one of the following values:
* - USART_CTSCF_FLAG: cts change flag (not available for UART4,UART5,USART6,UART7 and UART8)
* - USART_BFF_FLAG: break frame flag
* - USART_TDBE_FLAG: transmit data buffer empty flag
* - USART_TDC_FLAG: transmit data complete flag
* - USART_RDBF_FLAG: receive data buffer full flag
* - USART_IDLEF_FLAG: idle flag
* - USART_ROERR_FLAG: receiver overflow error flag
* - USART_NERR_FLAG: noise error flag
* - USART_FERR_FLAG: framing error flag
* - USART_PERR_FLAG: parity error flag
* @retval the new state of usart_flag (SET or RESET).
*/
flag_status usart_flag_get(usart_type* usart_x, uint32_t flag)
{
if(usart_x->sts & flag)
{
return SET;
}
else
{
return RESET;
}
}
/**
* @brief clear the usart's pending flags.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7 or UART8.
* @param flag: specifies the flag to clear.
* this parameter can be any combination of the following values:
* - USART_CTSCF_FLAG: (not available for UART4,UART5,USART6,UART7 and UART8).
* - USART_BFF_FLAG:
* - USART_TDC_FLAG:
* - USART_RDBF_FLAG:
* - USART_PERR_FLAG:
* - USART_FERR_FLAG:
* - USART_NERR_FLAG:
* - USART_ROERR_FLAG:
* - USART_IDLEF_FLAG:
* @note
* - USART_PERR_FLAG, USART_FERR_FLAG, USART_NERR_FLAG, USART_ROERR_FLAG and USART_IDLEF_FLAG are cleared by software
* sequence: a read operation to usart sts register (usart_flag_get())
* followed by a read operation to usart dt register (usart_data_receive()).
* - USART_RDBF_FLAG can be also cleared by a read to the usart dt register(usart_data_receive()).
* - USART_TDC_FLAG can be also cleared by software sequence: a read operation to usart sts register (usart_flag_get())
* followed by a write operation to usart dt register (usart_data_transmit()).
* - USART_TDBE_FLAG is cleared only by a write to the usart dt register(usart_data_transmit()).
* @retval none
*/
void usart_flag_clear(usart_type* usart_x, uint32_t flag)
{
if(flag & (USART_PERR_FLAG | USART_FERR_FLAG | USART_NERR_FLAG | USART_ROERR_FLAG | USART_IDLEF_FLAG))
{
UNUSED(usart_x->sts);
UNUSED(usart_x->dt);
}
else
{
usart_x->sts = ~flag;
}
}
/**
* @brief configure the usart's rs485 transmit delay time.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3
* @param start_delay_time: transmit start delay time.
* @param complete_delay_time: transmit complete delay time.
* @retval none
*/
void usart_rs485_delay_time_config(usart_type* usart_x, uint8_t start_delay_time, uint8_t complete_delay_time)
{
usart_x->ctrl1_bit.tsdt = start_delay_time;
usart_x->ctrl1_bit.tcdt = complete_delay_time;
}
/**
* @brief swap the usart's transmit receive pin.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7,or UART8.
* @param new_state: new state of the usart peripheral.
* this parameter can be: TRUE or FALSE.
* @retval none
*/
void usart_transmit_receive_pin_swap(usart_type* usart_x, confirm_state new_state)
{
usart_x->ctrl2_bit.trpswap = new_state;
}
/**
* @brief set the usart's identification bit num.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3, UART4, UART5, USART6, UART7,or UART8.
* @param id_bit_num: the usart wakeup identification bit num.
* this parameter can be: USART_ID_FIXED_4_BIT or USART_ID_RELATED_DATA_BIT.
* @retval none
*/
void usart_id_bit_num_set(usart_type* usart_x, usart_identification_bit_num_type id_bit_num)
{
usart_x->ctrl2_bit.idbn = (uint8_t)id_bit_num;
}
/**
* @brief set the usart's de polarity.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3
* @param de_polarity: the usart de polarity selection.
* this parameter can be: USART_DE_POLARITY_HIGH or USART_DE_POLARITY_LOW.
* @retval none
*/
void usart_de_polarity_set(usart_type* usart_x, usart_de_polarity_type de_polarity)
{
usart_x->ctrl3_bit.dep = (uint8_t)de_polarity;
}
/**
* @brief enable or disable the usart's rs485 mode.
* @param usart_x: select the usart or the uart peripheral.
* this parameter can be one of the following values:
* USART1, USART2, USART3
* @param new_state: new state of the irda mode.
* this parameter can be: TRUE or FALSE.
* @retval none
*/
void usart_rs485_mode_enable(usart_type* usart_x, confirm_state new_state)
{
usart_x->ctrl3_bit.rs485en = new_state;
}
/**
* @}
*/
#endif
/**
* @}
*/
/**
* @}
*/
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