500 lines
18 KiB
C
500 lines
18 KiB
C
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/*!
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\file gd32f3x0_cec.c
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\brief CEC driver
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\version 2017-06-06, V1.0.0, firmware for GD32F3x0
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\version 2019-06-01, V2.0.0, firmware for GD32F3x0
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*/
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/*
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Copyright (c) 2019, GigaDevice Semiconductor Inc.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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OF SUCH DAMAGE.
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*/
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#ifdef GD32F350
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#include "gd32f3x0_cec.h"
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/*!
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\brief reset HDMI-CEC controller
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\param[in] none
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\param[out] none
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\retval none
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*/
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void cec_deinit(void)
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{
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rcu_periph_reset_enable(RCU_CECRST);
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rcu_periph_reset_disable(RCU_CECRST);
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}
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/*!
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\brief configure signal free time,the signal free time counter start option,own address
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\param[in] sftmopt: signal free time counter start option
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only one parameter can be selected which is shown as below:
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\arg CEC_SFT_START_STAOM: signal free time counter starts counting when STAOM is asserted
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\arg CEC_SFT_START_LAST: signal free time counter starts automatically after transmission/reception end
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\param[in] sft: signal free time
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only one parameter can be selected which is shown as below:
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\arg CEC_SFT_PROTOCOL_PERIOD: the signal free time will perform as HDMI-CEC protocol description
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\arg CEC_SFT_1POINT5_PERIOD: 1.5 nominal data bit periods
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\arg CEC_SFT_2POINT5_PERIOD: 2.5 nominal data bit periods
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\arg CEC_SFT_3POINT5_PERIOD: 3.5 nominal data bit periods
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\arg CEC_SFT_4POINT5_PERIOD: 4.5 nominal data bit periods
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\arg CEC_SFT_5POINT5_PERIOD: 5.5 nominal data bit periods
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\arg CEC_SFT_6POINT5_PERIOD: 6.5 nominal data bit periods
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\arg CEC_SFT_7POINT5_PERIOD: 7.5 nominal data bit periods
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\param[in] address: own address
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only one parameter can be selected which is shown as below:
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\arg CEC_OWN_ADDRESS_CLEAR: own address is cleared
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\arg CEC_OWN_ADDRESSx(x=0..14): own address is x
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\param[out] none
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\retval none
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*/
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void cec_init(uint32_t sftmopt, uint32_t sft, uint32_t address)
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{
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uint32_t cfg;
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cfg = CEC_CFG;
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/* clear SFTMOPT bit,SFT[2:0] */
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cfg &= ~(CEC_CFG_SFTOPT | CEC_CFG_SFT);
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/* assign SFTMOPT bit,SFT[2:0] */
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cfg |= (sftmopt | sft);
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CEC_CFG = cfg;
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if(CEC_OWN_ADDRESS_CLEAR == address){
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CEC_CFG &= ~CEC_CFG_OWN_ADDRESS;
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}else{
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CEC_CFG |= address;
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}
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}
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/*!
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\brief configure generate Error-bit when detected some abnormal situation or not,
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whether stop receive message when detected bit rising error
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\param[in] broadcast:
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only one parameter can be selected which is shown as below:
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\arg CEC_BROADCAST_ERROR_BIT_ON:generate Error-bit in broadcast
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\arg CEC_BROADCAST_ERROR_BIT_OFF:do not generate Error-bit in broadcast
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\param[in] singlecast_lbpe:
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only one parameter can be selected which is shown as below:
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\arg CEC_LONG_PERIOD_ERROR_BIT_ON:generate Error-bit on long bit period error
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\arg CEC_LONG_PERIOD_ERROR_BIT_OFF:do not generate Error-bit on long bit period error
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\param[in] singlecast_bre:
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only one parameter can be selected which is shown as below:
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\arg CEC_RISING_PERIOD_ERROR_BIT_ON:generate Error-bit on bit rising error
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\arg CEC_RISING_PERIOD_ERROR_BIT_OFF:do not generate Error-bit on bit rising error
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\param[in] rxbrestp:
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only one parameter can be selected which is shown as below:
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\arg CEC_STOP_RISING_ERROR_BIT_ON: stop reception when detected bit rising error
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\arg CEC_STOP_RISING_ERROR_BIT_OFF: do not stop reception when detected bit rising error
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\param[out] none
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\retval none
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*/
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void cec_error_config(uint32_t broadcast, uint32_t singlecast_lbpe, uint32_t singlecast_bre, uint32_t rxbrestp)
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{
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uint32_t cfg;
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cfg = CEC_CFG;
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/* clear BCNG bit, BPLEG bit, BREG bit */
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cfg &= ~(CEC_CFG_BCNG | CEC_CFG_BPLEG | CEC_CFG_BREG);
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/* assign BCNG bit, BPLEG bit, BREG bit */
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cfg |= (broadcast | singlecast_lbpe | singlecast_bre);
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CEC_CFG = cfg;
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if(CEC_STOP_RISING_ERROR_BIT_ON == rxbrestp){
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CEC_CFG |= CEC_CFG_BRES;
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}else{
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CEC_CFG &= ~CEC_CFG_BRES;
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}
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}
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/*!
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\brief enable HDMI-CEC controller
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\param[in] none
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\param[out] none
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\retval none
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*/
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void cec_enable(void)
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{
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CEC_CTL |= CEC_CTL_CECEN;
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}
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/*!
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\brief disable HDMI-CEC controller
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\param[in] none
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\param[out] none
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\retval none
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*/
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void cec_disable(void)
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{
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CEC_CTL &= ~CEC_CTL_CECEN;
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}
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/*!
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\brief start CEC message transmission
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\param[in] none
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\param[out] none
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\retval none
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*/
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void cec_transmission_start(void)
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{
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CEC_CTL |= CEC_CTL_STAOM;
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}
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/*!
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\brief end CEC message transmission
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\param[in] none
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\param[out] none
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\retval none
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*/
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void cec_transmission_end(void)
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{
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CEC_CTL |= CEC_CTL_ENDOM;
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}
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/*!
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\brief enable CEC listen mode.
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\param[in] none
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\param[out] none
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\retval none
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*/
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void cec_listen_mode_enable(void)
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{
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CEC_CFG |= CEC_CFG_LMEN;
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}
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/*!
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\brief disable CEC listen mode.
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\param[in] none
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\param[out] none
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\retval none
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*/
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void cec_listen_mode_disable(void)
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{
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CEC_CFG &= ~CEC_CFG_LMEN;
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}
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/*!
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\brief configure and clear own address.the controller can be configured to multiple own address
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\param[in] address: own address
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one or more parameters can be selected which are shown as below:
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\arg CEC_OWN_ADDRESS_CLEAR: own address is cleared
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\arg CEC_OWN_ADDRESSx(x=0..14): own address is x
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\param[out] none
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\retval none
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*/
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void cec_own_address_config(uint32_t address)
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{
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if(CEC_OWN_ADDRESS_CLEAR == address){
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CEC_CFG &= ~CEC_CFG_OWN_ADDRESS;
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} else {
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CEC_CFG |= address;
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}
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}
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/*!
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\brief configure signal free time and the signal free time counter start option
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\param[in] sftmopt: signal free time counter start option
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only one parameter can be selected which is shown as below:
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\arg CEC_SFT_START_STAOM: signal free time counter starts counting when STAOM is asserted
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\arg CEC_SFT_START_LAST: signal free time counter starts automatically after transmission/reception end
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\param[in] sft: signal free time
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only one parameter can be selected which is shown as below:
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\arg CEC_SFT_PROTOCOL_PERIOD: the signal free time will perform as HDMI-CEC protocol description
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\arg CEC_SFT_1POINT5_PERIOD: 1.5 nominal data bit periods
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\arg CEC_SFT_2POINT5_PERIOD: 2.5 nominal data bit periods
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\arg CEC_SFT_3POINT5_PERIOD: 3.5 nominal data bit periods
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\arg CEC_SFT_4POINT5_PERIOD: 4.5 nominal data bit periods
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\arg CEC_SFT_5POINT5_PERIOD: 5.5 nominal data bit periods
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\arg CEC_SFT_6POINT5_PERIOD: 6.5 nominal data bit periods
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\arg CEC_SFT_7POINT5_PERIOD: 7.5 nominal data bit periods
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\param[out] none
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\retval none
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*/
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void cec_sft_config(uint32_t sftmopt, uint32_t sft)
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{
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uint32_t cfg;
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cfg = CEC_CFG;
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/* clear SFTMOPT bit,SFT[2:0] */
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cfg &= ~(CEC_CFG_SFTOPT | CEC_CFG_SFT);
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/* assign SFTMOPT bit,SFT[2:0] */
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cfg |= (sftmopt | sft);
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CEC_CFG = cfg;
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}
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/*!
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\brief configure generate Error-bit when detected some abnormal situation or not
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\param[in] broadcast:
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only one parameter can be selected which is shown as below:
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\arg CEC_BROADCAST_ERROR_BIT_ON:generate Error-bit in broadcast
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\arg CEC_BROADCAST_ERROR_BIT_OFF:do not generate Error-bit in broadcast
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\param[in] singlecast_lbpe:
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only one parameter can be selected which is shown as below:
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\arg CEC_LONG_PERIOD_ERROR_BIT_ON:generate Error-bit on long bit period error
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\arg CEC_LONG_PERIOD_ERROR_BIT_OFF:do not generate Error-bit on long bit period error
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\param[in] singlecast_bre:
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only one parameter can be selected which is shown as below:
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\arg CEC_RISING_PERIOD_ERROR_BIT_ON:generate Error-bit on bit rising error
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\arg CEC_RISING_PERIOD_ERROR_BIT_OFF:do not generate Error-bit on bit rising error
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\param[out] none
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\retval none
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*/
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void cec_generate_errorbit_config(uint32_t broadcast, uint32_t singlecast_lbpe, uint32_t singlecast_bre)
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{
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uint32_t cfg;
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cfg = CEC_CFG;
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/* clear BCNG bit, RLBPEGEN bit, RBREGEN bit */
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cfg &= ~(CEC_CFG_BCNG | CEC_CFG_BPLEG | CEC_CFG_BREG);
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/* assign BCNG bit, RLBPEGEN bit, RBREGEN bit */
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cfg |= (broadcast | singlecast_lbpe | singlecast_bre);
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CEC_CFG = cfg;
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}
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/*!
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\brief whether stop receive message when detected bit rising error
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\param[in] rxbrestp:
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only one parameter can be selected which is shown as below:
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\arg CEC_STOP_RISING_ERROR_BIT_ON: stop reception when detected bit rising error
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\arg CEC_STOP_RISING_ERROR_BIT_OFF: do not stop reception when detected bit rising error
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\param[out] none
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\retval none
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*/
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void cec_stop_receive_bre_config(uint32_t rxbrestp)
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{
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if(CEC_STOP_RISING_ERROR_BIT_ON == rxbrestp){
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CEC_CFG |= CEC_CFG_BRES;
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} else {
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CEC_CFG &= ~CEC_CFG_BRES;
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}
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}
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/*!
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\brief enable reception bit timing tolerance
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\param[in] none
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\param[out] none
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\retval none
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*/
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void cec_reception_tolerance_enable(void)
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{
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CEC_CFG |= CEC_CFG_RTOL;
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}
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/*!
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\brief disable reception bit timing tolerance
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\param[in] none
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\param[out] none
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\retval none
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*/
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void cec_reception_tolerance_disable(void)
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{
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CEC_CFG &= ~CEC_CFG_RTOL;
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}
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/*!
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\brief send a data by the CEC peripheral
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\param[in] data: the data to transmit
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\param[out] none
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\retval none
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*/
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void cec_data_send(uint8_t data)
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{
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CEC_TDATA = (uint32_t)data;
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}
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/*!
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\brief receive a data by the CEC peripheral
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\param[in] data: the data to receive
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\param[out] none
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\retval none
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*/
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uint8_t cec_data_receive(void)
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{
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return (uint8_t)CEC_RDATA;
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}
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/*!
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\brief enable interrupt
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\param[in] flag: specify which flag
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one or more parameters can be selected which are shown as below:
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\arg CEC_INT_BR: enable Rx-byte data received interrupt
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\arg CEC_INT_REND: enable end of reception interrupt
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\arg CEC_INT_RO: enable RX overrun interrupt
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\arg CEC_INT_BRE: enable bit rising error interrupt
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\arg CEC_INT_BPSE: enable short bit period error interrupt
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\arg CEC_INT_BPLE: enable long bit period error interrupt
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\arg CEC_INT_RAE: enable Rx ACK error interrupt
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\arg CEC_INT_ARBF: enable arbitration lost interrupt
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\arg CEC_INT_TBR: enable Tx-byte data request interrupt
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\arg CEC_INT_TEND: enable transmission successfully end interrupt
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\arg CEC_INT_TU: enable Tx data buffer underrun interrupt
|
||
|
|
\arg CEC_INT_TERR: enable Tx-error interrupt
|
||
|
|
\arg CEC_INT_TAERR: enable Tx ACK error interrupt
|
||
|
|
\param[out] none
|
||
|
|
\retval none
|
||
|
|
*/
|
||
|
|
void cec_interrupt_enable(uint32_t flag)
|
||
|
|
{
|
||
|
|
CEC_INTEN |= flag;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief disable interrupt
|
||
|
|
\param[in] flag: specify which flag
|
||
|
|
one or more parameters can be selected which are shown as below:
|
||
|
|
\arg CEC_INT_BR: disable Rx-byte data received interrupt
|
||
|
|
\arg CEC_INT_REND: disable end of reception interrupt
|
||
|
|
\arg CEC_INT_RO: disable RX overrun interrupt
|
||
|
|
\arg CEC_INT_BRE: disable bit rising error interrupt
|
||
|
|
\arg CEC_INT_BPSE: disable short bit period error interrupt
|
||
|
|
\arg CEC_INT_BPLE: disable long bit period error interrupt
|
||
|
|
\arg CEC_INT_RAE: disable Rx ACK error interrupt
|
||
|
|
\arg CEC_INT_ARBF: disable arbitration lost interrupt
|
||
|
|
\arg CEC_INT_TBR: disable Tx-byte data request interrupt
|
||
|
|
\arg CEC_INT_TEND: disable transmission successfully end interrupt
|
||
|
|
\arg CEC_INT_TU: disable Tx data buffer underrun interrupt
|
||
|
|
\arg CEC_INT_TERR: disable Tx-error interrupt
|
||
|
|
\arg CEC_INT_TAERR: disable Tx ACK error interrupt
|
||
|
|
|
||
|
|
\param[out] none
|
||
|
|
\retval none
|
||
|
|
*/
|
||
|
|
void cec_interrupt_disable(uint32_t flag)
|
||
|
|
{
|
||
|
|
CEC_INTEN &= ~flag;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief get CEC status
|
||
|
|
\param[in] flag: specify which flag
|
||
|
|
one or more parameters can be selected which are shown as below:
|
||
|
|
\arg CEC_FLAG_BR: Rx-byte data received
|
||
|
|
\arg CEC_FLAG_REND: end of reception
|
||
|
|
\arg CEC_FLAG_RO: RX overrun
|
||
|
|
\arg CEC_FLAG_BRE: bit rising error
|
||
|
|
\arg CEC_FLAG_BPSE: short bit period error
|
||
|
|
\arg CEC_FLAG_BPLE: long bit period error
|
||
|
|
\arg CEC_FLAG_RAE: Rx ACK error
|
||
|
|
\arg CEC_FLAG_ARBF: arbitration lost
|
||
|
|
\arg CEC_FLAG_TBR: Tx-byte data request
|
||
|
|
\arg CEC_FLAG_TEND: transmission successfully end
|
||
|
|
\arg CEC_FLAG_TU: Tx data buffer underrun
|
||
|
|
\arg CEC_FLAG_TERR: Tx-error
|
||
|
|
\arg CEC_FLAG_TAERR Tx ACK error flag
|
||
|
|
\param[out] none
|
||
|
|
\retval FlagStatus: SET or RESET
|
||
|
|
*/
|
||
|
|
FlagStatus cec_flag_get(uint32_t flag)
|
||
|
|
{
|
||
|
|
if(CEC_INTF & flag){
|
||
|
|
return SET;
|
||
|
|
}else{
|
||
|
|
return RESET;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief clear CEC status
|
||
|
|
\param[in] flag: specify which flag
|
||
|
|
one or more parameters can be selected which are shown as below:
|
||
|
|
\arg CEC_FLAG_BR: Rx-byte data received
|
||
|
|
\arg CEC_FLAG_REND: end of reception
|
||
|
|
\arg CEC_FLAG_RO: RX overrun
|
||
|
|
\arg CEC_FLAG_BRE: bit rising error
|
||
|
|
\arg CEC_FLAG_BPSE: short bit period error
|
||
|
|
\arg CEC_FLAG_BPLE: long bit period error
|
||
|
|
\arg CEC_FLAG_RAE: Rx ACK error
|
||
|
|
\arg CEC_FLAG_ARBF: arbitration lost
|
||
|
|
\arg CEC_FLAG_TBR: Tx-byte data request
|
||
|
|
\arg CEC_FLAG_TEND: transmission successfully end
|
||
|
|
\arg CEC_FLAG_TU: Tx data buffer underrun
|
||
|
|
\arg CEC_FLAG_TERR: Tx-error
|
||
|
|
\arg CEC_FLAG_TAERR: Tx ACK error flag
|
||
|
|
|
||
|
|
\param[out] none
|
||
|
|
\retval FlagStatus: SET or RESET
|
||
|
|
*/
|
||
|
|
void cec_flag_clear(uint32_t flag)
|
||
|
|
{
|
||
|
|
CEC_INTF |= flag;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief get CEC int flag and status
|
||
|
|
\param[in] flag: specify which flag
|
||
|
|
one or more parameters can be selected which are shown as below:
|
||
|
|
\arg CEC_INT_FLAG_BR: Rx-byte data received
|
||
|
|
\arg CEC_INT_FLAG_REND: end of reception
|
||
|
|
\arg CEC_INT_FLAG_RO: RX overrun
|
||
|
|
\arg CEC_INT_FLAG_BRE: bit rising error
|
||
|
|
\arg CEC_INT_FLAG_BPSE: short bit period error
|
||
|
|
\arg CEC_INT_FLAG_BPLE: long bit period error
|
||
|
|
\arg CEC_INT_FLAG_RAE: Rx ACK error
|
||
|
|
\arg CEC_INT_FLAG_ARBF: arbitration lost
|
||
|
|
\arg CEC_INT_FLAG_TBR: Tx-byte data request
|
||
|
|
\arg CEC_INT_FLAG_TEND: transmission successfully end
|
||
|
|
\arg CEC_INT_FLAG_TU: Tx data buffer underrun
|
||
|
|
\arg CEC_INT_FLAG_TERR: Tx-error
|
||
|
|
\arg CEC_INT_FLAG_TAERR: Tx ACK error flag
|
||
|
|
\param[out] none
|
||
|
|
\retval FlagStatus: SET or RESET
|
||
|
|
*/
|
||
|
|
FlagStatus cec_interrupt_flag_get(uint32_t flag)
|
||
|
|
{
|
||
|
|
uint32_t interrupt_enable = 0U,interrupt_flag = 0U;
|
||
|
|
interrupt_flag = (CEC_INTF & flag);
|
||
|
|
interrupt_enable = (CEC_INTEN & flag);
|
||
|
|
if(interrupt_flag && interrupt_enable){
|
||
|
|
return SET;
|
||
|
|
}else{
|
||
|
|
return RESET;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief clear CEC int flag and status
|
||
|
|
\param[in] flag: specify which flag
|
||
|
|
one or more parameters can be selected which are shown as below:
|
||
|
|
\arg CEC_INT_FLAG_BR: Rx-byte data received
|
||
|
|
\arg CEC_INT_FLAG_REND: end of reception
|
||
|
|
\arg CEC_INT_FLAG_RO: RX overrun
|
||
|
|
\arg CEC_INT_FLAG_BRE: bit rising error
|
||
|
|
\arg CEC_INT_FLAG_BPSE: short bit period error
|
||
|
|
\arg CEC_INT_FLAG_BPLE: long bit period error
|
||
|
|
\arg CEC_INT_FLAG_RAE: Rx ACK error
|
||
|
|
\arg CEC_INT_FLAG_ARBF: arbitration lost
|
||
|
|
\arg CEC_INT_FLAG_TBR: Tx-byte data request
|
||
|
|
\arg CEC_INT_FLAG_TEND: transmission successfully end
|
||
|
|
\arg CEC_INT_FLAG_TU: Tx data buffer underrun
|
||
|
|
\arg CEC_INT_FLAG_TERR: Tx-error
|
||
|
|
\arg CEC_INT_FLAG_TAERR: Tx ACK error flag
|
||
|
|
\param[out] none
|
||
|
|
\retval none
|
||
|
|
*/
|
||
|
|
void cec_interrupt_flag_clear(uint32_t flag)
|
||
|
|
{
|
||
|
|
CEC_INTF = flag;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#endif
|