From e4e7b661172477aaa682a9cccfbac89adb1d01f6 Mon Sep 17 00:00:00 2001 From: Pixel Date: Sun, 23 Jan 2011 12:15:41 -0800 Subject: Adding basic CMSIS source code; v1.3.0 from the NXP website currently. --- arch/arm/lpc17xx/Drivers/source/lpc17xx_i2s.c | 642 ++++++++++++++++++++++++++ 1 file changed, 642 insertions(+) create mode 100644 arch/arm/lpc17xx/Drivers/source/lpc17xx_i2s.c (limited to 'arch/arm/lpc17xx/Drivers/source/lpc17xx_i2s.c') diff --git a/arch/arm/lpc17xx/Drivers/source/lpc17xx_i2s.c b/arch/arm/lpc17xx/Drivers/source/lpc17xx_i2s.c new file mode 100644 index 0000000..e151edb --- /dev/null +++ b/arch/arm/lpc17xx/Drivers/source/lpc17xx_i2s.c @@ -0,0 +1,642 @@ +/***********************************************************************//** + * @file lpc17xx_i2s.c + * @brief Contains all functions support for I2S firmware library on LPC17xx + * @version 3.0 + * @date 18. June. 2010 + * @author NXP MCU SW Application Team + ************************************************************************** + * Software that is described herein is for illustrative purposes only + * which provides customers with programming information regarding the + * products. This software is supplied "AS IS" without any warranties. + * NXP Semiconductors assumes no responsibility or liability for the + * 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. + **********************************************************************/ + +/* Peripheral group ----------------------------------------------------------- */ +/** @addtogroup I2S + * @{ + */ + +/* Includes ------------------------------------------------------------------- */ +#include "lpc17xx_i2s.h" +#include "lpc17xx_clkpwr.h" + + +/* If this source file built with example, the LPC17xx FW library configuration + * file in each example directory ("lpc17xx_libcfg.h") must be included, + * otherwise the default FW library configuration file must be included instead + */ +#ifdef __BUILD_WITH_EXAMPLE__ +#include "lpc17xx_libcfg.h" +#else +#include "lpc17xx_libcfg_default.h" +#endif /* __BUILD_WITH_EXAMPLE__ */ + + +#ifdef _I2S + +/* Private Functions ---------------------------------------------------------- */ + +static uint8_t i2s_GetWordWidth(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode); +static uint8_t i2s_GetChannel(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode); + +/********************************************************************//** + * @brief Get I2S wordwidth value + * @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S + * @param[in] TRMode is the I2S mode, should be: + * - I2S_TX_MODE = 0: transmit mode + * - I2S_RX_MODE = 1: receive mode + * @return The wordwidth value, should be: 8,16 or 32 + *********************************************************************/ +static uint8_t i2s_GetWordWidth(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) { + uint8_t value; + + CHECK_PARAM(PARAM_I2Sx(I2Sx)); + CHECK_PARAM(PARAM_I2S_TRX(TRMode)); + + if (TRMode == I2S_TX_MODE) { + value = (I2Sx->I2SDAO) & 0x03; /* get wordwidth bit */ + } else { + value = (I2Sx->I2SDAI) & 0x03; /* get wordwidth bit */ + } + switch (value) { + case I2S_WORDWIDTH_8: + return 8; + case I2S_WORDWIDTH_16: + return 16; + default: + return 32; + } +} + +/********************************************************************//** + * @brief Get I2S channel value + * @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S + * @param[in] TRMode is the I2S mode, should be: + * - I2S_TX_MODE = 0: transmit mode + * - I2S_RX_MODE = 1: receive mode + * @return The channel value, should be: 1(mono) or 2(stereo) + *********************************************************************/ +static uint8_t i2s_GetChannel(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) { + uint8_t value; + + CHECK_PARAM(PARAM_I2Sx(I2Sx)); + CHECK_PARAM(PARAM_I2S_TRX(TRMode)); + + if (TRMode == I2S_TX_MODE) { + value = (I2Sx->I2SDAO) & 0x04; /* get bit[2] */ + } else { + value = (I2Sx->I2SDAI) & 0x04; /* get bit[2] */ + } + if(value == I2S_MONO) return 1; + return 2; +} + +/* End of Private Functions --------------------------------------------------- */ + + +/* Public Functions ----------------------------------------------------------- */ +/** @addtogroup I2S_Public_Functions + * @{ + */ + +/********************************************************************//** + * @brief Initialize I2S + * - Turn on power and clock + * @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S + * @return none + *********************************************************************/ +void I2S_Init(LPC_I2S_TypeDef *I2Sx) { + CHECK_PARAM(PARAM_I2Sx(I2Sx)); + + // Turn on power and clock + CLKPWR_ConfigPPWR(CLKPWR_PCONP_PCI2S, ENABLE); + LPC_I2S->I2SDAI = LPC_I2S->I2SDAO = 0x00; +} + +/********************************************************************//** + * @brief Configuration I2S, setting: + * - master/slave mode + * - wordwidth value + * - channel mode + * @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S + * @param[in] TRMode transmit/receive mode, should be: + * - I2S_TX_MODE = 0: transmit mode + * - I2S_RX_MODE = 1: receive mode + * @param[in] ConfigStruct pointer to I2S_CFG_Type structure + * which will be initialized. + * @return none + *********************************************************************/ +void I2S_Config(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode, I2S_CFG_Type* ConfigStruct) +{ + uint32_t bps, config; + + CHECK_PARAM(PARAM_I2Sx(I2Sx)); + + CHECK_PARAM(PARAM_I2S_WORDWIDTH(ConfigStruct->wordwidth)); + CHECK_PARAM(PARAM_I2S_CHANNEL(ConfigStruct->mono)); + CHECK_PARAM(PARAM_I2S_STOP(ConfigStruct->stop)); + CHECK_PARAM(PARAM_I2S_RESET(ConfigStruct->reset)); + CHECK_PARAM(PARAM_I2S_WS_SEL(ConfigStruct->ws_sel)); + CHECK_PARAM(PARAM_I2S_MUTE(ConfigStruct->mute)); + + /* Setup clock */ + bps = (ConfigStruct->wordwidth +1)*8; + + /* Calculate audio config */ + config = (bps - 1)<<6 | (ConfigStruct->ws_sel)<<5 | (ConfigStruct->reset)<<4 | + (ConfigStruct->stop)<<3 | (ConfigStruct->mono)<<2 | (ConfigStruct->wordwidth); + + if(TRMode == I2S_RX_MODE){ + LPC_I2S->I2SDAI = config; + }else{ + LPC_I2S->I2SDAO = config; + } +} + +/********************************************************************//** + * @brief DeInitial both I2S transmit or receive + * @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S + * @return none + *********************************************************************/ +void I2S_DeInit(LPC_I2S_TypeDef *I2Sx) { + CHECK_PARAM(PARAM_I2Sx(I2Sx)); + + // Turn off power and clock + CLKPWR_ConfigPPWR(CLKPWR_PCONP_PCI2S, DISABLE); +} + +/********************************************************************//** + * @brief Get I2S Buffer Level + * @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S + * @param[in] TRMode Transmit/receive mode, should be: + * - I2S_TX_MODE = 0: transmit mode + * - I2S_RX_MODE = 1: receive mode + * @return current level of Transmit/Receive Buffer + *********************************************************************/ +uint8_t I2S_GetLevel(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) +{ + CHECK_PARAM(PARAM_I2Sx(I2Sx)); + CHECK_PARAM(PARAM_I2S_TRX(TRMode)); + + if(TRMode == I2S_TX_MODE) + { + return ((I2Sx->I2SSTATE >> 16) & 0xFF); + } + else + { + return ((I2Sx->I2SSTATE >> 8) & 0xFF); + } +} + +/********************************************************************//** + * @brief I2S Start: clear all STOP,RESET and MUTE bit, ready to operate + * @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S + * @return none + *********************************************************************/ +void I2S_Start(LPC_I2S_TypeDef *I2Sx) +{ + //Clear STOP,RESET and MUTE bit + I2Sx->I2SDAO &= ~I2S_DAI_RESET; + I2Sx->I2SDAI &= ~I2S_DAI_RESET; + I2Sx->I2SDAO &= ~I2S_DAI_STOP; + I2Sx->I2SDAI &= ~I2S_DAI_STOP; + I2Sx->I2SDAO &= ~I2S_DAI_MUTE; +} + +/********************************************************************//** + * @brief I2S Send data + * @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S + * @param[in] BufferData pointer to uint32_t is the data will be send + * @return none + *********************************************************************/ +void I2S_Send(LPC_I2S_TypeDef *I2Sx, uint32_t BufferData) { + CHECK_PARAM(PARAM_I2Sx(I2Sx)); + + I2Sx->I2STXFIFO = BufferData; +} + +/********************************************************************//** + * @brief I2S Receive Data + * @param[in] I2Sx pointer to LPC_I2S_TypeDef + * @return received value + *********************************************************************/ +uint32_t I2S_Receive(LPC_I2S_TypeDef* I2Sx) { + CHECK_PARAM(PARAM_I2Sx(I2Sx)); + + return (I2Sx->I2SRXFIFO); + +} + +/********************************************************************//** + * @brief I2S Pause + * @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 none + *********************************************************************/ +void I2S_Pause(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) { + CHECK_PARAM(PARAM_I2Sx(I2Sx)); + CHECK_PARAM(PARAM_I2S_TRX(TRMode)); + + if (TRMode == I2S_TX_MODE) //Transmit mode + { + I2Sx->I2SDAO |= I2S_DAO_STOP; + } else //Receive mode + { + I2Sx->I2SDAI |= I2S_DAI_STOP; + } +} + +/********************************************************************//** + * @brief I2S Mute + * @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 none + *********************************************************************/ +void I2S_Mute(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) { + CHECK_PARAM(PARAM_I2Sx(I2Sx)); + CHECK_PARAM(PARAM_I2S_TRX(TRMode)); + + if (TRMode == I2S_TX_MODE) //Transmit mode + { + I2Sx->I2SDAO |= I2S_DAO_MUTE; + } else //Receive mode + { + I2Sx->I2SDAI |= I2S_DAI_MUTE; + } +} + +/********************************************************************//** + * @brief I2S Stop + * @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 none + *********************************************************************/ +void I2S_Stop(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) { + CHECK_PARAM(PARAM_I2Sx(I2Sx)); + CHECK_PARAM(PARAM_I2S_TRX(TRMode)); + + if (TRMode == I2S_TX_MODE) //Transmit mode + { + I2Sx->I2SDAO &= ~I2S_DAO_MUTE; + I2Sx->I2SDAO |= I2S_DAO_STOP; + I2Sx->I2SDAO |= I2S_DAO_RESET; + } else //Receive mode + { + I2Sx->I2SDAI |= I2S_DAI_STOP; + I2Sx->I2SDAI |= I2S_DAI_RESET; + } +} + +/********************************************************************//** + * @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 + * 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_I2S_TypeDef *I2Sx, uint32_t Freq, uint8_t TRMode) { + + /* 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; + uint8_t x_divide, y_divide; + uint16_t ErrorOptimal = 0xFFFF; + + CHECK_PARAM(PARAM_I2Sx(I2Sx)); + CHECK_PARAM(PRAM_I2S_FREQ(Freq)); + CHECK_PARAM(PARAM_I2S_TRX(TRMode)); + + i2sPclk = CLKPWR_GetPCLK(CLKPWR_PCLKSEL_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 = channel * wordwidth - 1; + if (TRMode == I2S_TX_MODE)// Transmitter + { + I2Sx->I2STXBITRATE = bitrate; + } else //Receiver + { + I2Sx->I2SRXBITRATE = bitrate; + } + /* 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; + * So: (X/Y) = (Freq * bit_rate)/PCLK*2 + * We use a loop function to chose the most suitable X,Y value + */ + + divider = ((uint64_t)(Freq *( bitrate+1)* 2)<<16) / i2sPclk; + for (y = 255; y > 0; y--) { + x = y * divider; + 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 = (y_divide * Freq *( bitrate+1)* 2)/i2sPclk; + if (TRMode == I2S_TX_MODE)// Transmitter + { + I2Sx->I2STXRATE = y_divide | (x_divide << 8); + } else //Receiver + { + I2Sx->I2SRXRATE = 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_I2S_TypeDef *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->I2STXBITRATE = bitrate; + } + else + { + I2Sx->I2SRXBITRATE = 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_I2S_TypeDef *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->I2STXMODE &= ~0x0F; //clear bit 3:0 in I2STXMODE register + if (ModeConfig->clksel == I2S_CLKSEL_MCLK) { + I2Sx->I2STXMODE |= 0x02; + } + if (ModeConfig->fpin == I2S_4PIN_ENABLE) { + I2Sx->I2STXMODE |= (1 << 2); + } + if (ModeConfig->mcena == I2S_MCLK_ENABLE) { + I2Sx->I2STXMODE |= (1 << 3); + } + } else { + I2Sx->I2SRXMODE &= ~0x0F; //clear bit 3:0 in I2STXMODE register + if (ModeConfig->clksel == I2S_CLKSEL_MCLK) { + I2Sx->I2SRXMODE |= 0x02; + } + if (ModeConfig->fpin == I2S_4PIN_ENABLE) { + I2Sx->I2SRXMODE |= (1 << 2); + } + if (ModeConfig->mcena == I2S_MCLK_ENABLE) { + I2Sx->I2SRXMODE |= (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_I2S_TypeDef *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) { + LPC_I2S->I2SDMA1 = (DMAConfig->depth) << 8; + } else { + LPC_I2S->I2SDMA2 = (DMAConfig->depth) << 8; + } + } else { + if (DMAConfig->DMAIndex == I2S_DMA_1) { + LPC_I2S->I2SDMA1 = (DMAConfig->depth) << 16; + } else { + LPC_I2S->I2SDMA2 = (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_I2S_TypeDef *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->I2SDMA1 |= 0x01; + else + I2Sx->I2SDMA1 &= ~0x01; + } else { + if (NewState == ENABLE) + I2Sx->I2SDMA2 |= 0x01; + else + I2Sx->I2SDMA2 &= ~0x01; + } + } else { + if (DMAIndex == I2S_DMA_1) { + if (NewState == ENABLE) + I2Sx->I2SDMA1 |= 0x02; + else + I2Sx->I2SDMA1 &= ~0x02; + } else { + if (NewState == ENABLE) + I2Sx->I2SDMA2 |= 0x02; + else + I2Sx->I2SDMA2 &= ~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_I2S_TypeDef *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->I2SIRQ |= (level << 8); + } else { + I2Sx->I2SIRQ |= (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_I2S_TypeDef *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->I2SIRQ |= 0x01; + else + I2Sx->I2SIRQ &= ~0x01; + //Enable DMA + + } else { + if (NewState == ENABLE) + I2Sx->I2SIRQ |= 0x02; + else + I2Sx->I2SIRQ &= ~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_I2S_TypeDef *I2Sx,uint8_t TRMode) +{ + CHECK_PARAM(PARAM_I2Sx(I2Sx)); + if(TRMode == I2S_TX_MODE) + return ((I2Sx->I2SIRQ >> 1)&0x01); + else + return ((I2Sx->I2SIRQ)&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_I2S_TypeDef *I2Sx,uint8_t TRMode) +{ + CHECK_PARAM(PARAM_I2Sx(I2Sx)); + if(TRMode == I2S_TX_MODE) + return (((I2Sx->I2SIRQ)>>16)&0xFF); + else + return (((I2Sx->I2SIRQ)>>8)&0xFF); +} +/** + * @} + */ + +#endif /* _I2S */ + +/** + * @} + */ + +/* --------------------------------- End Of File ------------------------------ */ + -- cgit v1.2.3