Diff: I2S_Example/i2s_irq_test.c
- Revision:
- 0:63ed631d8c3a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/I2S_Example/i2s_irq_test.c Fri Jan 21 08:39:48 2011 +0000
@@ -0,0 +1,273 @@
+/***********************************************************************//**
+ * @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 "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 ***********************/
+uint8_t menu[]=
+ "********************************************************************************\n\r"
+ "Hello NXP Semiconductors \n\r"
+ " I2S interrupt mode demo \n\r"
+ "\t - MCU: mbed-005.1 LPC1768 \n\r"
+ "\t - Core: ARM CORTEX-M3 \n\r"
+ "\t - Communicate via: UART0 - 9600 bps \n\r"
+ " Use two I2S channels in the same board to transfer data in interrupt mode\n\r"
+ "********************************************************************************\n\r";
+
+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);
+
+
+/*----------------- 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++ )
+ {
+ I2STXBuffer[i] = i |(i << 16);
+ I2SRXBuffer[i] = 0;
+ }
+
+}
+
+/*-------------------------MAIN FUNCTION------------------------------*/
+/*********************************************************************//**
+ * @brief mbed_i2s_init: Main program body
+ * @param[in] None
+ * @return int
+ **********************************************************************/
+// for mbed
+void mbed_i2s_init(void){
+
+ I2S_MODEConf_Type I2S_ClkConfig;
+ I2S_CFG_Type I2S_ConfigStruct;
+ 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
+ * - P0.5 as I2SRX_WS
+ * - P0.6 as I2SRX_SDA
+ * - 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.Pinnum = 4;
+ PinCfg.Portnum = 0;
+ 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);
+ 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
+
+/*
+ * @}
+ */