rename lpc43 cmsis folder, preparing to upgrade cmsis from v2.10 to 3.01
This commit is contained in:
hathach
668
demos/bsp/lpc43xx/CMSIS_LPC43xx_DriverLib/src/lpc43xx_i2s.c
Normal file
668
demos/bsp/lpc43xx/CMSIS_LPC43xx_DriverLib/src/lpc43xx_i2s.c
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@@ -0,0 +1,668 @@
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/**********************************************************************
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* $Id$ lpc43xx_i2s.c 2011-06-02
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*//**
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* @file lpc43xx_i2s.c
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* @brief Contains all functions support for I2S firmware library
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* on lpc43xx
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* @version 1.0
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* @date 02. June. 2011
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* @author NXP MCU SW Application Team
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*
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* Copyright(C) 2011, NXP Semiconductor
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* All rights reserved.
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*
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***********************************************************************
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* Software that is described herein is for illustrative purposes only
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* which provides customers with programming information regarding the
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* products. This software is supplied "AS IS" without any warranties.
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||||
* NXP Semiconductors assumes no responsibility or liability for the
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* use of the software, conveys no license or title under any patent,
|
||||
* copyright, or mask work right to the product. NXP Semiconductors
|
||||
* reserves the right to make changes in the software without
|
||||
* notification. NXP Semiconductors also make no representation or
|
||||
* warranty that such application will be suitable for the specified
|
||||
* use without further testing or modification.
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||||
* Permission to use, copy, modify, and distribute this software and its
|
||||
* documentation is hereby granted, under NXP Semiconductors<72>
|
||||
* relevant copyright in the software, without fee, provided that it
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||||
* is used in conjunction with NXP Semiconductors microcontrollers. This
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||||
* copyright, permission, and disclaimer notice must appear in all copies of
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* this code.
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**********************************************************************/
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/* Peripheral group ----------------------------------------------------------- */
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/** @addtogroup I2S
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* @{
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*/
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/* Includes ------------------------------------------------------------------- */
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#include "lpc43xx_i2s.h"
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#include "lpc43xx_cgu.h"
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/* If this source file built with example, the lpc43xx FW library configuration
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* file in each example directory ("lpc43xx_libcfg.h") must be included,
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* otherwise the default FW library configuration file must be included instead
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*/
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#ifdef __BUILD_WITH_EXAMPLE__
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#include "lpc43xx_libcfg.h"
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#else
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#include "lpc43xx_libcfg_default.h"
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#endif /* __BUILD_WITH_EXAMPLE__ */
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#ifdef _I2S
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/* Private Functions ---------------------------------------------------------- */
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static uint8_t i2s_GetWordWidth(LPC_I2Sn_Type *I2Sx, uint8_t TRMode);
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static uint8_t i2s_GetChannel(LPC_I2Sn_Type *I2Sx, uint8_t TRMode);
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/********************************************************************//**
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* @brief Get I2S wordwidth value
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* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
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* @param[in] TRMode is the I2S mode, should be:
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* - I2S_TX_MODE = 0 :transmit mode
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* - I2S_RX_MODE = 1 :receive mode
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* @return The wordwidth value, should be: 8,16 or 32
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*********************************************************************/
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static uint8_t i2s_GetWordWidth(LPC_I2Sn_Type *I2Sx, uint8_t TRMode) {
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uint8_t value;
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CHECK_PARAM(PARAM_I2Sx(I2Sx));
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CHECK_PARAM(PARAM_I2S_TRX(TRMode));
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if (TRMode == I2S_TX_MODE) {
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value = (I2Sx->DAO) & 0x03; /* get wordwidth bit */
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} else {
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value = (I2Sx->DAI) & 0x03; /* get wordwidth bit */
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}
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switch (value) {
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case I2S_WORDWIDTH_8:
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return 8;
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case I2S_WORDWIDTH_16:
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return 16;
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default:
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return 32;
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}
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}
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/********************************************************************//**
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* @brief Get I2S channel value
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* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
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* @param[in] TRMode is the I2S mode, should be:
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* - I2S_TX_MODE = 0 :transmit mode
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* - I2S_RX_MODE = 1 :receive mode
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* @return The channel value, should be: 1(mono) or 2(stereo)
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*********************************************************************/
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static uint8_t i2s_GetChannel(LPC_I2Sn_Type *I2Sx, uint8_t TRMode) {
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uint8_t value;
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CHECK_PARAM(PARAM_I2Sx(I2Sx));
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CHECK_PARAM(PARAM_I2S_TRX(TRMode));
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if (TRMode == I2S_TX_MODE) {
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value = (I2Sx->DAO) & 0x04; /* get bit[2] */
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} else {
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value = (I2Sx->DAI) & 0x04; /* get bit[2] */
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}
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value >>= 2;
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if(value == I2S_MONO) return 1;
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return 2;
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}
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/* End of Private Functions --------------------------------------------------- */
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/* Public Functions ----------------------------------------------------------- */
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/** @addtogroup I2S_Public_Functions
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* @{
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*/
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/********************************************************************//**
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* @brief Initialize I2S
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* - Turn on power and clock
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* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
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* @return none
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*********************************************************************/
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void I2S_Init(LPC_I2Sn_Type *I2Sx) {
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CHECK_PARAM(PARAM_I2Sx(I2Sx));
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// Turn on power and clock
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//CGU_ConfigPPWR(CGU_PCONP_PCI2S, ENABLE);
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I2Sx->DAI = I2Sx->DAO = 0x00;
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}
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/********************************************************************//**
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* @brief Configuration I2S, setting:
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* - master/slave mode
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* - wordwidth value
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* - channel mode
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* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
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* @param[in] TRMode transmit/receive mode, should be:
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* - I2S_TX_MODE = 0 :transmit mode
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* - I2S_RX_MODE = 1 :receive mode
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* @param[in] ConfigStruct pointer to I2S_CFG_Type structure
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* which will be initialized.
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* @return none
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*********************************************************************/
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void I2S_Config(LPC_I2Sn_Type *I2Sx, uint8_t TRMode, I2S_CFG_Type* ConfigStruct)
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{
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uint32_t bps, config;
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CHECK_PARAM(PARAM_I2Sx(I2Sx));
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CHECK_PARAM(PARAM_I2S_WORDWIDTH(ConfigStruct->wordwidth));
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CHECK_PARAM(PARAM_I2S_CHANNEL(ConfigStruct->mono));
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CHECK_PARAM(PARAM_I2S_STOP(ConfigStruct->stop));
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CHECK_PARAM(PARAM_I2S_RESET(ConfigStruct->reset));
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CHECK_PARAM(PARAM_I2S_WS_SEL(ConfigStruct->ws_sel));
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CHECK_PARAM(PARAM_I2S_MUTE(ConfigStruct->mute));
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/* Setup clock */
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bps = (ConfigStruct->wordwidth +1)*8;
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/* Calculate audio config */
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config = (bps - 1)<<6 | (ConfigStruct->ws_sel)<<5 | (ConfigStruct->reset)<<4 |
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(ConfigStruct->stop)<<3 | (ConfigStruct->mono)<<2 | (ConfigStruct->wordwidth);
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if(TRMode == I2S_RX_MODE){
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I2Sx->DAI = config;
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}else{
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I2Sx->DAO = config;
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}
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}
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/********************************************************************//**
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* @brief DeInitial both I2S transmit or receive
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* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
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* @return none
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*********************************************************************/
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void I2S_DeInit(LPC_I2Sn_Type *I2Sx) {
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CHECK_PARAM(PARAM_I2Sx(I2Sx));
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// Turn off power and clock
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//CGU_ConfigPPWR(CGU_PCONP_PCI2S, DISABLE);
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}
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/********************************************************************//**
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* @brief Get I2S Buffer Level
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* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
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* @param[in] TRMode Transmit/receive mode, should be:
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* - I2S_TX_MODE = 0 :transmit mode
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* - I2S_RX_MODE = 1 :receive mode
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* @return current level of Transmit/Receive Buffer
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*********************************************************************/
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uint8_t I2S_GetLevel(LPC_I2Sn_Type *I2Sx, uint8_t TRMode)
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{
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CHECK_PARAM(PARAM_I2Sx(I2Sx));
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CHECK_PARAM(PARAM_I2S_TRX(TRMode));
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if(TRMode == I2S_TX_MODE)
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{
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return ((I2Sx->STATE >> 16) & 0xFF);
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}
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else
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{
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return ((I2Sx->STATE >> 8) & 0xFF);
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}
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}
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/********************************************************************//**
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* @brief I2S Start: clear all STOP,RESET and MUTE bit, ready to operate
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* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
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* @return none
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*********************************************************************/
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void I2S_Start(LPC_I2Sn_Type *I2Sx)
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{
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//Clear STOP,RESET and MUTE bit
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I2Sx->DAO &= ~I2S_DAI_RESET;
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I2Sx->DAI &= ~I2S_DAI_RESET;
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I2Sx->DAO &= ~I2S_DAI_STOP;
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I2Sx->DAI &= ~I2S_DAI_STOP;
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I2Sx->DAO &= ~I2S_DAI_MUTE;
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}
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/********************************************************************//**
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* @brief I2S Send data
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* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
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* @param[in] BufferData pointer to uint32_t is the data will be send
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* @return none
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*********************************************************************/
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void I2S_Send(LPC_I2Sn_Type *I2Sx, uint32_t BufferData) {
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CHECK_PARAM(PARAM_I2Sx(I2Sx));
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I2Sx->TXFIFO = BufferData;
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}
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/********************************************************************//**
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* @brief I2S Receive Data
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* @param[in] I2Sx pointer to LPC_I2Sn_Type, should be: LPC_I2S
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* @return received value
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*********************************************************************/
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uint32_t I2S_Receive(LPC_I2Sn_Type* I2Sx) {
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CHECK_PARAM(PARAM_I2Sx(I2Sx));
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return (I2Sx->RXFIFO);
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}
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/********************************************************************//**
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* @brief I2S Pause
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* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
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* @param[in] TRMode is transmit/receive mode, should be:
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* - I2S_TX_MODE = 0 :transmit mode
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* - I2S_RX_MODE = 1 :receive mode
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* @return none
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*********************************************************************/
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void I2S_Pause(LPC_I2Sn_Type *I2Sx, uint8_t TRMode) {
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CHECK_PARAM(PARAM_I2Sx(I2Sx));
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CHECK_PARAM(PARAM_I2S_TRX(TRMode));
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if (TRMode == I2S_TX_MODE) //Transmit mode
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{
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I2Sx->DAO |= I2S_DAO_STOP;
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} else //Receive mode
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{
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I2Sx->DAI |= I2S_DAI_STOP;
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}
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}
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/********************************************************************//**
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* @brief I2S Mute
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* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
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* @param[in] TRMode is transmit/receive mode, should be:
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* - I2S_TX_MODE = 0 :transmit mode
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* - I2S_RX_MODE = 1 :receive mode
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* @return none
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*********************************************************************/
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void I2S_Mute(LPC_I2Sn_Type *I2Sx, uint8_t TRMode) {
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CHECK_PARAM(PARAM_I2Sx(I2Sx));
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CHECK_PARAM(PARAM_I2S_TRX(TRMode));
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if (TRMode == I2S_TX_MODE) //Transmit mode
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{
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I2Sx->DAO |= I2S_DAO_MUTE;
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} else //Receive mode
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{
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I2Sx->DAI |= I2S_DAI_MUTE;
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}
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}
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/********************************************************************//**
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* @brief I2S Stop
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* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
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* @param[in] TRMode is transmit/receive mode, should be:
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* - I2S_TX_MODE = 0 :transmit mode
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* - I2S_RX_MODE = 1 :receive mode
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* @return none
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*********************************************************************/
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void I2S_Stop(LPC_I2Sn_Type *I2Sx, uint8_t TRMode) {
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CHECK_PARAM(PARAM_I2Sx(I2Sx));
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CHECK_PARAM(PARAM_I2S_TRX(TRMode));
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if (TRMode == I2S_TX_MODE) //Transmit mode
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{
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I2Sx->DAO &= ~I2S_DAO_MUTE;
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I2Sx->DAO |= I2S_DAO_STOP;
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I2Sx->DAO |= I2S_DAO_RESET;
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} else //Receive mode
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{
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I2Sx->DAI |= I2S_DAI_STOP;
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I2Sx->DAI |= I2S_DAI_RESET;
|
||||
}
|
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}
|
||||
|
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/********************************************************************//**
|
||||
* @brief Set frequency for I2S
|
||||
* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
|
||||
* @param[in] Freq is the frequency for I2S will be set. It can range
|
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* from 16-96 kHz(16, 22.05, 32, 44.1, 48, 96kHz)
|
||||
* @param[in] TRMode is transmit/receive mode, should be:
|
||||
* - I2S_TX_MODE = 0 :transmit mode
|
||||
* - I2S_RX_MODE = 1 :receive mode
|
||||
* @return Status: ERROR or SUCCESS
|
||||
*********************************************************************/
|
||||
Status I2S_FreqConfig(LPC_I2Sn_Type *I2Sx, uint32_t Freq, uint8_t TRMode) {
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||||
|
||||
/* Calculate bit rate
|
||||
* The formula is:
|
||||
* bit_rate = channel*wordwidth - 1
|
||||
* 48kHz sample rate for 16 bit stereo date requires
|
||||
* a bit rate of 48000*16*2=1536MHz (MCLK)
|
||||
*/
|
||||
uint32_t i2sPclk;
|
||||
uint64_t divider;
|
||||
uint8_t bitrate, channel, wordwidth;
|
||||
uint32_t x, y;
|
||||
uint16_t dif;
|
||||
uint16_t error;
|
||||
uint16_t x_divide, y_divide;
|
||||
uint16_t ErrorOptimal = 0xFFFF;
|
||||
int32_t N;
|
||||
|
||||
CHECK_PARAM(PARAM_I2Sx(I2Sx));
|
||||
CHECK_PARAM(PRAM_I2S_FREQ(Freq));
|
||||
CHECK_PARAM(PARAM_I2S_TRX(TRMode));
|
||||
|
||||
//LPC_CGU->BASE_VPB1_CLK = 0x08<<24 | AUTO_BLOCK;
|
||||
CGU_EntityConnect(CGU_CLKSRC_PLL1, CGU_BASE_APB1);
|
||||
i2sPclk = CGU_GetPCLKFrequency(CGU_PERIPHERAL_I2S);
|
||||
if(TRMode == I2S_TX_MODE)
|
||||
{
|
||||
channel = i2s_GetChannel(I2Sx,I2S_TX_MODE);
|
||||
wordwidth = i2s_GetWordWidth(I2Sx,I2S_TX_MODE);
|
||||
}
|
||||
else
|
||||
{
|
||||
channel = i2s_GetChannel(I2Sx,I2S_RX_MODE);
|
||||
wordwidth = i2s_GetWordWidth(I2Sx,I2S_RX_MODE);
|
||||
}
|
||||
bitrate = 2 * wordwidth - 1;
|
||||
|
||||
/* Calculate X and Y divider
|
||||
* The MCLK rate for the I2S transmitter is determined by the value
|
||||
* in the I2STXRATE/I2SRXRATE register. The required I2STXRATE/I2SRXRATE
|
||||
* setting depends on the desired audio sample rate desired, the format
|
||||
* (stereo/mono) used, and the data size.
|
||||
* The formula is:
|
||||
* I2S_MCLK = PCLK * (X/Y) / 2
|
||||
* We have:
|
||||
* I2S_MCLK = Freq * bit_rate * I2Sx->TXBITRATE;
|
||||
* So: (X/Y) = (Freq * bit_rate * I2Sx->TXBITRATE)/PCLK*2
|
||||
* We use a loop function to chose the most suitable X,Y value
|
||||
*/
|
||||
|
||||
/* divider is a fixed point number with 16 fractional bits */
|
||||
divider = ((uint64_t)(Freq *( bitrate+1) * 2)<<16) / i2sPclk;
|
||||
|
||||
/* find N that make x/y <= 1 -> divider <= 2^16 */
|
||||
for(N=64;N>=0;N--){
|
||||
if((divider*N) < (1<<16)) break;
|
||||
}
|
||||
|
||||
if(N == 0) return ERROR;
|
||||
|
||||
divider *= N;
|
||||
|
||||
for (y = 255; y > 0; y--) {
|
||||
x = y * divider;
|
||||
if(x & (0xFF000000)) continue;
|
||||
dif = x & 0xFFFF;
|
||||
if(dif>0x8000) error = 0x10000-dif;
|
||||
else error = dif;
|
||||
if (error == 0)
|
||||
{
|
||||
y_divide = y;
|
||||
break;
|
||||
}
|
||||
else if (error < ErrorOptimal)
|
||||
{
|
||||
ErrorOptimal = error;
|
||||
y_divide = y;
|
||||
}
|
||||
}
|
||||
x_divide = ((uint64_t)y_divide * Freq *( bitrate+1)* N * 2)/i2sPclk;
|
||||
if(x_divide >= 256) x_divide = 0xFF;
|
||||
if(x_divide == 0) x_divide = 1;
|
||||
if (TRMode == I2S_TX_MODE)// Transmitter
|
||||
{
|
||||
I2Sx->TXBITRATE = N;
|
||||
I2Sx->TXRATE = y_divide | (x_divide << 8);
|
||||
} else //Receiver
|
||||
{
|
||||
I2Sx->RXBITRATE = N;
|
||||
I2Sx->RXRATE = y_divide | (x_divide << 8);
|
||||
}
|
||||
return SUCCESS;
|
||||
}
|
||||
|
||||
/********************************************************************//**
|
||||
* @brief I2S set bitrate
|
||||
* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
|
||||
* @param[in] bitrate value will be set, it can be calculate as follows:
|
||||
* bitrate = channel * wordwidth - 1
|
||||
* bitrate value should be in range: 0 .. 63
|
||||
* @param[in] TRMode is transmit/receive mode, should be:
|
||||
* - I2S_TX_MODE = 0 :transmit mode
|
||||
* - I2S_RX_MODE = 1 :receive mode
|
||||
* @return none
|
||||
*********************************************************************/
|
||||
void I2S_SetBitRate(LPC_I2Sn_Type *I2Sx, uint8_t bitrate, uint8_t TRMode)
|
||||
{
|
||||
CHECK_PARAM(PARAM_I2Sx(I2Sx));
|
||||
CHECK_PARAM(PARAM_I2S_BITRATE(bitrate));
|
||||
CHECK_PARAM(PARAM_I2S_TRX(TRMode));
|
||||
|
||||
if(TRMode == I2S_TX_MODE)
|
||||
{
|
||||
I2Sx->TXBITRATE = bitrate;
|
||||
}
|
||||
else
|
||||
{
|
||||
I2Sx->RXBITRATE = bitrate;
|
||||
}
|
||||
}
|
||||
|
||||
/********************************************************************//**
|
||||
* @brief Configuration operating mode for I2S
|
||||
* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
|
||||
* @param[in] ModeConfig pointer to I2S_MODEConf_Type will be used to
|
||||
* configure
|
||||
* @param[in] TRMode is transmit/receive mode, should be:
|
||||
* - I2S_TX_MODE = 0 :transmit mode
|
||||
* - I2S_RX_MODE = 1 :receive mode
|
||||
* @return none
|
||||
*********************************************************************/
|
||||
void I2S_ModeConfig(LPC_I2Sn_Type *I2Sx, I2S_MODEConf_Type* ModeConfig,
|
||||
uint8_t TRMode)
|
||||
{
|
||||
CHECK_PARAM(PARAM_I2Sx(I2Sx));
|
||||
CHECK_PARAM(PARAM_I2S_CLKSEL(ModeConfig->clksel));
|
||||
CHECK_PARAM(PARAM_I2S_4PIN(ModeConfig->fpin));
|
||||
CHECK_PARAM(PARAM_I2S_MCLK(ModeConfig->mcena));
|
||||
CHECK_PARAM(PARAM_I2S_TRX(TRMode));
|
||||
|
||||
if (TRMode == I2S_TX_MODE) {
|
||||
I2Sx->TXMODE &= ~0x0F; //clear bit 3:0 in I2STXMODE register
|
||||
if (ModeConfig->clksel == I2S_CLKSEL_MCLK) {
|
||||
I2Sx->TXMODE |= 0x02;
|
||||
}
|
||||
if (ModeConfig->fpin == I2S_4PIN_ENABLE) {
|
||||
I2Sx->TXMODE |= (1 << 2);
|
||||
}
|
||||
if (ModeConfig->mcena == I2S_MCLK_ENABLE) {
|
||||
I2Sx->TXMODE |= (1 << 3);
|
||||
}
|
||||
} else {
|
||||
I2Sx->RXMODE &= ~0x0F; //clear bit 3:0 in I2STXMODE register
|
||||
if (ModeConfig->clksel == I2S_CLKSEL_MCLK) {
|
||||
I2Sx->RXMODE |= 0x02;
|
||||
}
|
||||
if (ModeConfig->fpin == I2S_4PIN_ENABLE) {
|
||||
I2Sx->RXMODE |= (1 << 2);
|
||||
}
|
||||
if (ModeConfig->mcena == I2S_MCLK_ENABLE) {
|
||||
I2Sx->RXMODE |= (1 << 3);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/********************************************************************//**
|
||||
* @brief Configure DMA operation for I2S
|
||||
* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
|
||||
* @param[in] DMAConfig pointer to I2S_DMAConf_Type will be used to configure
|
||||
* @param[in] TRMode is transmit/receive mode, should be:
|
||||
* - I2S_TX_MODE = 0 :transmit mode
|
||||
* - I2S_RX_MODE = 1 :receive mode
|
||||
* @return none
|
||||
*********************************************************************/
|
||||
void I2S_DMAConfig(LPC_I2Sn_Type *I2Sx, I2S_DMAConf_Type* DMAConfig,
|
||||
uint8_t TRMode)
|
||||
{
|
||||
CHECK_PARAM(PARAM_I2Sx(I2Sx));
|
||||
CHECK_PARAM(PARAM_I2S_DMA(DMAConfig->DMAIndex));
|
||||
CHECK_PARAM(PARAM_I2S_DMA_DEPTH(DMAConfig->depth));
|
||||
CHECK_PARAM(PARAM_I2S_TRX(TRMode));
|
||||
|
||||
if (TRMode == I2S_RX_MODE) {
|
||||
if (DMAConfig->DMAIndex == I2S_DMA_1) {
|
||||
I2Sx->DMA1 = (DMAConfig->depth) << 8;
|
||||
} else {
|
||||
I2Sx->DMA2 = (DMAConfig->depth) << 8;
|
||||
}
|
||||
} else {
|
||||
if (DMAConfig->DMAIndex == I2S_DMA_1) {
|
||||
I2Sx->DMA1 = (DMAConfig->depth) << 16;
|
||||
} else {
|
||||
I2Sx->DMA2 = (DMAConfig->depth) << 16;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/********************************************************************//**
|
||||
* @brief Enable/Disable DMA operation for I2S
|
||||
* @param[in] I2Sx: I2S peripheral selected, should be: LPC_I2S
|
||||
* @param[in] DMAIndex chose what DMA is used, should be:
|
||||
* - I2S_DMA_1 = 0 :DMA1
|
||||
* - I2S_DMA_2 = 1 :DMA2
|
||||
* @param[in] TRMode is transmit/receive mode, should be:
|
||||
* - I2S_TX_MODE = 0 :transmit mode
|
||||
* - I2S_RX_MODE = 1 :receive mode
|
||||
* @param[in] NewState is new state of DMA operation, should be:
|
||||
* - ENABLE
|
||||
* - DISABLE
|
||||
* @return none
|
||||
*********************************************************************/
|
||||
void I2S_DMACmd(LPC_I2Sn_Type *I2Sx, uint8_t DMAIndex, uint8_t TRMode,
|
||||
FunctionalState NewState)
|
||||
{
|
||||
CHECK_PARAM(PARAM_I2Sx(I2Sx));
|
||||
CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));
|
||||
CHECK_PARAM(PARAM_I2S_DMA(DMAIndex));
|
||||
CHECK_PARAM(PARAM_I2S_TRX(TRMode));
|
||||
|
||||
if (TRMode == I2S_RX_MODE) {
|
||||
if (DMAIndex == I2S_DMA_1) {
|
||||
if (NewState == ENABLE)
|
||||
I2Sx->DMA1 |= 0x01;
|
||||
else
|
||||
I2Sx->DMA1 &= ~0x01;
|
||||
} else {
|
||||
if (NewState == ENABLE)
|
||||
I2Sx->DMA2 |= 0x01;
|
||||
else
|
||||
I2Sx->DMA2 &= ~0x01;
|
||||
}
|
||||
} else {
|
||||
if (DMAIndex == I2S_DMA_1) {
|
||||
if (NewState == ENABLE)
|
||||
I2Sx->DMA1 |= 0x02;
|
||||
else
|
||||
I2Sx->DMA1 &= ~0x02;
|
||||
} else {
|
||||
if (NewState == ENABLE)
|
||||
I2Sx->DMA2 |= 0x02;
|
||||
else
|
||||
I2Sx->DMA2 &= ~0x02;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/********************************************************************//**
|
||||
* @brief Configure IRQ for I2S
|
||||
* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
|
||||
* @param[in] TRMode is transmit/receive mode, should be:
|
||||
* - I2S_TX_MODE = 0 :transmit mode
|
||||
* - I2S_RX_MODE = 1 :receive mode
|
||||
* @param[in] level is the FIFO level that triggers IRQ request
|
||||
* @return none
|
||||
*********************************************************************/
|
||||
void I2S_IRQConfig(LPC_I2Sn_Type *I2Sx, uint8_t TRMode, uint8_t level) {
|
||||
CHECK_PARAM(PARAM_I2Sx(I2Sx));
|
||||
CHECK_PARAM(PARAM_I2S_TRX(TRMode));
|
||||
CHECK_PARAM(PARAM_I2S_IRQ_LEVEL(level));
|
||||
|
||||
if (TRMode == I2S_RX_MODE) {
|
||||
I2Sx->IRQ |= (level << 8);
|
||||
} else {
|
||||
I2Sx->IRQ |= (level << 16);
|
||||
}
|
||||
}
|
||||
|
||||
/********************************************************************//**
|
||||
* @brief Enable/Disable IRQ for I2S
|
||||
* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
|
||||
* @param[in] TRMode is transmit/receive mode, should be:
|
||||
* - I2S_TX_MODE = 0 :transmit mode
|
||||
* - I2S_RX_MODE = 1 :receive mode
|
||||
* @param[in] NewState is new state of DMA operation, should be:
|
||||
* - ENABLE
|
||||
* - DISABLE
|
||||
* @return none
|
||||
*********************************************************************/
|
||||
void I2S_IRQCmd(LPC_I2Sn_Type *I2Sx, uint8_t TRMode, FunctionalState NewState) {
|
||||
CHECK_PARAM(PARAM_I2Sx(I2Sx));
|
||||
CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));
|
||||
|
||||
if (TRMode == I2S_RX_MODE) {
|
||||
if (NewState == ENABLE)
|
||||
I2Sx->IRQ |= 0x01;
|
||||
else
|
||||
I2Sx->IRQ &= ~0x01;
|
||||
//Enable DMA
|
||||
|
||||
} else {
|
||||
if (NewState == ENABLE)
|
||||
I2Sx->IRQ |= 0x02;
|
||||
else
|
||||
I2Sx->IRQ &= ~0x02;
|
||||
}
|
||||
}
|
||||
|
||||
/********************************************************************//**
|
||||
* @brief Get I2S interrupt status
|
||||
* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
|
||||
* @param[in] TRMode is transmit/receive mode, should be:
|
||||
* - I2S_TX_MODE = 0 :transmit mode
|
||||
* - I2S_RX_MODE = 1 :receive mode
|
||||
* @return FunctionState should be:
|
||||
* - ENABLE :interrupt is enable
|
||||
* - DISABLE :interrupt is disable
|
||||
*********************************************************************/
|
||||
FunctionalState I2S_GetIRQStatus(LPC_I2Sn_Type *I2Sx,uint8_t TRMode)
|
||||
{
|
||||
CHECK_PARAM(PARAM_I2Sx(I2Sx));
|
||||
if(TRMode == I2S_TX_MODE)
|
||||
return (FunctionalState)((I2Sx->IRQ >> 1)&0x01);
|
||||
else
|
||||
return (FunctionalState)((I2Sx->IRQ)&0x01);
|
||||
}
|
||||
|
||||
/********************************************************************//**
|
||||
* @brief Get I2S interrupt depth
|
||||
* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
|
||||
* @param[in] TRMode is transmit/receive mode, should be:
|
||||
* - I2S_TX_MODE = 0 :transmit mode
|
||||
* - I2S_RX_MODE = 1 :receive mode
|
||||
* @return depth of FIFO level on which to create an irq request
|
||||
*********************************************************************/
|
||||
uint8_t I2S_GetIRQDepth(LPC_I2Sn_Type *I2Sx,uint8_t TRMode)
|
||||
{
|
||||
CHECK_PARAM(PARAM_I2Sx(I2Sx));
|
||||
if(TRMode == I2S_TX_MODE)
|
||||
return (((I2Sx->IRQ)>>16)&0xFF);
|
||||
else
|
||||
return (((I2Sx->IRQ)>>8)&0xFF);
|
||||
}
|
||||
/**
|
||||
* @}
|
||||
*/
|
||||
|
||||
#endif /* _I2S */
|
||||
|
||||
/**
|
||||
* @}
|
||||
*/
|
||||
|
||||
/* --------------------------------- End Of File ------------------------------ */
|
||||
Reference in New Issue
Block a user