Diff: I2S_Example/i2s_irq_test.c

Revision:

0:d920d64db582

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/I2S_Example/i2s_irq_test.c	Wed Mar 30 06:05:24 2011 +0000
@@ -0,0 +1,278 @@
+/***********************************************************************//**
+ * @file        i2s_irq_test.c
+ * @purpose        This example describes how to use I2S transfer in interrupt
+ *                   mode
+ * @version        2.0
+ * @date        21. May. 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.
+ **********************************************************************/
+#include "lpc17xx_i2s.h"
+#include "lpc17xx_libcfg.h"
+#include "lpc17xx_pinsel.h"
+//#include "lpc17xx_gpdma.h"
+//#include "debug_frmwrk.h"
+#include "lpc17xx_clkpwr.h"
+#include "i2s_irq_test.h"
+#include "mbed.h"
+
+
+
+/* Example group ----------------------------------------------------------- */
+/** @defgroup I2S_IRQ    I2S_IRQ
+ * @ingroup I2S_Examples
+ * @{
+ */
+
+
+/************************** PRIVATE VARIABLES ***********************/
+
+volatile uint8_t  I2STXDone = 0;
+volatile uint8_t  I2SRXDone = 0;
+
+volatile uint32_t *I2STXBuffer = (uint32_t*)(I2S_BUFFER_SRC);
+volatile uint32_t *I2SRXBuffer = (uint32_t *)(I2S_BUFFER_DST);
+
+volatile uint32_t I2SReadLength = 0;
+volatile uint32_t I2SWriteLength = 0;
+
+uint8_t tx_depth_irq = 0;
+uint8_t rx_depth_irq = 0;
+uint8_t dummy=0;
+
+
+/************************** PRIVATE FUNCTIONS *************************/
+void I2S_IRQHandler(void);
+void Buffer_Init(void);
+Bool Buffer_Verify(void);
+void print_menu(void);
+
+/*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/
+/*********************************************************************//**
+ * @brief        I2S IRQ Handler
+ * @param[in]    None
+ * @return         None
+ **********************************************************************/
+/*void I2S_IRQHandler()
+{
+    uint32_t RXLevel = 0;
+
+    //Check RX interrupt
+    if(I2S_GetIRQStatus(LPC_I2S, I2S_RX_MODE))
+    {
+        RXLevel = I2S_GetLevel(LPC_I2S, I2S_RX_MODE);
+        if ( (RXLevel != RXFIFO_EMPTY) && !I2SRXDone )
+        {
+            while ( RXLevel > 0 )
+            {
+                if ( I2SReadLength == BUFFER_SIZE )
+                {
+                    //Stop RX
+                    I2S_Stop(LPC_I2S, I2S_RX_MODE);
+                    // Disable RX
+                    I2S_IRQCmd(LPC_I2S, I2S_RX_MODE, DISABLE);
+                    I2SRXDone = 1;
+                    break;
+                }
+                else
+                {
+                    I2SRXBuffer[I2SReadLength++] = LPC_I2S->I2SRXFIFO;
+                }
+                RXLevel--;
+            }
+        }
+    }
+    return;
+}
+*/
+/*-------------------------PRIVATE FUNCTIONS------------------------------*/
+/*********************************************************************//**
+ * @brief        Initialize buffer
+ * @param[in]    None
+ * @return         None
+ **********************************************************************/
+void Buffer_Init(void) {
+    uint32_t i;
+    for ( i = 0; i < BUFFER_SIZE; i++ )    /* clear buffer */
+    {
+    I2STXBuffer[i] = i |(i << 16);
+    I2SRXBuffer[i] = 0;
+    }
+
+}
+
+/*********************************************************************//**
+ * @brief        Verify buffer
+ * @param[in]    none
+ * @return         TRUE - if two buffers are similar
+ *                 FALSE - if two buffers are different
+ **********************************************************************/
+Bool Buffer_Verify(void) {
+    uint32_t i;
+    uint32_t *pTX = (uint32_t *) &I2STXBuffer[0];
+    uint32_t *pRX = (uint32_t *) &I2SRXBuffer[1];
+    /* Because first element of RX is dummy 0 value, so we just verify
+     * from 2nd element
+     */
+    for (i = 1; i < BUFFER_SIZE; i++) {
+        if (*pTX++ != *pRX++)  {
+            return FALSE;
+        }
+    }
+    return TRUE;
+}
+
+// for mbed
+void mbed_i2s_init(void){
+
+    //GPDMA_Channel_CFG_Type GPDMACfg;    // DMA
+    I2S_MODEConf_Type I2S_ClkConfig;
+    I2S_CFG_Type I2S_ConfigStruct;
+    //I2S_DMAConf_Type I2S_DMAStruct;     // DMA
+    PINSEL_CFG_Type PinCfg;
+
+    // uint32_t i;
+    /* Initialize debug via UART0
+     * 115200bps
+     * 8 data bit
+     * No parity
+     * 1 stop bit
+     * No flow control
+     */
+    // debug_frmwrk_init();
+    // print menu screen
+    // print_menu();
+
+
+    /* Initialize I2S peripheral ------------------------------------*/
+    /* Pin configuration:
+    * Assign:     - P0.4 as I2SRX_CLK  <- No use 
+    *             - P0.5 as I2SRX_WS   <- No use
+    *             - P0.6 as I2SRX_SDA  <- No use
+    *             - P0.7 as I2STX_CLK
+    *             - P0.8 as I2STX_WS
+    *             - P0.9 as I2STX_SDA
+    */
+    PinCfg.Funcnum = 1;
+    PinCfg.OpenDrain = 0;
+    PinCfg.Pinmode = 0;
+    PinCfg.Portnum = 0;
+    //PinCfg.Pinnum = 4;
+    //PINSEL_ConfigPin(&PinCfg);
+    //PinCfg.Pinnum = 5;
+    //PINSEL_ConfigPin(&PinCfg);
+    //PinCfg.Pinnum = 6;
+    //PINSEL_ConfigPin(&PinCfg);
+    PinCfg.Pinnum = 7;
+    PINSEL_ConfigPin(&PinCfg);
+    PinCfg.Pinnum = 8;
+    PINSEL_ConfigPin(&PinCfg);
+    PinCfg.Pinnum = 9;
+    PINSEL_ConfigPin(&PinCfg);
+
+    //Buffer_Init();
+    I2S_Init(LPC_I2S);  
+
+    /* setup:
+     *         - wordwidth: 16 bits
+     *         - stereo mode
+     *         - master mode for I2S_TX and slave for I2S_RX
+     *         - ws_halfperiod is 31
+     *         - not use mute mode
+     *         - use reset and stop mode
+     *         - select the fractional rate divider clock output as the source,
+     *         - disable 4-pin mode
+     *         - MCLK ouput is disable
+     *         - Frequency = 44.1 kHz
+     * Because we use mode I2STXMODE[3:0]= 0000, I2SDAO[5]=0 and
+     * I2SRX[3:0]=0000, I2SDAI[5] = 1. So we have I2SRX_CLK = I2STX_CLK
+     * --> I2SRXBITRATE = 1 (not divide TXCLK to produce RXCLK)
+     */
+    
+    /* Audio Config*/
+    I2S_ConfigStruct.wordwidth = I2S_WORDWIDTH_16;
+    I2S_ConfigStruct.mono = I2S_STEREO;
+    I2S_ConfigStruct.stop = I2S_STOP_ENABLE;
+    I2S_ConfigStruct.reset = I2S_RESET_ENABLE;
+    I2S_ConfigStruct.ws_sel = I2S_SLAVE_MODE;
+    I2S_ConfigStruct.mute = I2S_MUTE_DISABLE;
+    I2S_Config(LPC_I2S,I2S_TX_MODE,&I2S_ConfigStruct);
+    
+    //I2S_ConfigStruct.ws_sel = I2S_SLAVE_MODE;
+    //I2S_Config(LPC_I2S,I2S_RX_MODE,&I2S_ConfigStruct);
+    
+    /* Clock Mode Config*/
+    CLKPWR_SetPCLKDiv(CLKPWR_PCLKSEL_I2S,CLKPWR_PCLKSEL_CCLK_DIV_4);
+    I2S_ClkConfig.clksel = I2S_CLKSEL_FRDCLK;
+    I2S_ClkConfig.fpin = I2S_4PIN_DISABLE;
+    I2S_ClkConfig.mcena = I2S_MCLK_DISABLE; 
+    I2S_ModeConfig(LPC_I2S,&I2S_ClkConfig,I2S_TX_MODE);
+    //I2S_ModeConfig(LPC_I2S,&I2S_ClkConfig,I2S_RX_MODE);
+
+
+    //I2S_FreqConfig(LPC_I2S, (uint16_t)44100, I2S_TX_MODE);    <- No use bacause I2S_TX is Slave mode
+    I2S_SetBitRate(LPC_I2S, 0, I2S_TX_MODE); //FOR SLAVE MODE TX
+    //I2S_SetBitRate(LPC_I2S, 0, I2S_RX_MODE);
+    
+    I2S_Stop(LPC_I2S, I2S_TX_MODE);
+    //I2S_Stop(LPC_I2S, I2S_RX_MODE);
+    
+
+
+    
+    NVIC_EnableIRQ(I2S_IRQn);
+    
+    /* RX FIFO depth is 1, TX FIFO depth is 8. */
+    I2S_IRQConfig(LPC_I2S,I2S_TX_MODE,8);
+    //I2S_IRQConfig(LPC_I2S,I2S_RX_MODE,1);
+    //I2S_IRQCmd(LPC_I2S,I2S_TX_MODE,ENABLE);
+    
+    
+    
+
+
+    I2S_Start(LPC_I2S);
+    
+}
+
+
+
+
+
+
+
+
+
+
+
+#ifdef  DEBUG
+/*******************************************************************************
+* @brief        Reports the name of the source file and the source line number
+*                 where the CHECK_PARAM error has occurred.
+* @param[in]    file Pointer to the source file name
+* @param[in]    line assert_param error line source number
+* @return        None
+*******************************************************************************/
+void check_failed(uint8_t *file, uint32_t line)
+{
+    /* User can add his own implementation to report the file name and line number,
+     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
+
+    /* Infinite loop */
+    while(1);
+}
+#endif
+
+/*
+ * @}
+ */