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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [hal/] [arm/] [edb7xxx/] [v2_0/] [misc/] [i2s_audio_test.c] - Rev 27
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//========================================================================== // // i2s_audio_test.c // // Cirrus CL7209 eval board CS4340 audio test // //========================================================================== //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. // // eCos is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 2 or (at your option) any later version. // // eCos is distributed in the hope that it will be useful, but WITHOUT ANY // WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // You should have received a copy of the GNU General Public License along // with eCos; if not, write to the Free Software Foundation, Inc., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. // // As a special exception, if other files instantiate templates or use macros // or inline functions from this file, or you compile this file and link it // with other works to produce a work based on this file, this file does not // by itself cause the resulting work to be covered by the GNU General Public // License. However the source code for this file must still be made available // in accordance with section (3) of the GNU General Public License. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): gthomas // Contributors: gthomas // Date: 2000-01-03 // Description: Tool used to test AUDIO interface //####DESCRIPTIONEND#### #include <pkgconf/kernel.h> // Configuration header #include <cyg/kernel/kapi.h> #include <cyg/infra/diag.h> #include <cyg/hal/hal_edb7xxx.h> // Board definitions #include <cyg/hal/hal_io.h> // IO macros #include <cyg/hal/hal_arch.h> // Register state info #include <cyg/hal/hal_diag.h> #include <cyg/hal/hal_intr.h> // HAL interrupt macros #include <cyg/hal/drv_api.h> // HAL ISR support #if 1 #include "long_audio_left.h" #include "long_audio_right.h" #else #include "short_audio_left.h" #include "short_audio_right.h" #endif extern void i2s_FIQ(void); // Actually the FIQ handler // Number of data samples to play #define NUM_PCM_SAMPLES (sizeof(left_channel)/sizeof(left_channel[0])) // Play the data in 8 "chunks", truncated to multiple of 4 samples #define CHUNK_LENGTH (((NUM_PCM_SAMPLES/8)/4)*4) // This structure is used by the assembly coded interrupt routine struct audio_buf { void *left_chan_ptr; void *right_chan_ptr; int length; }; volatile struct audio_buf cur_buf; volatile struct audio_buf next_buf; #ifndef FALSE #define FALSE 0 #define TRUE 1 #endif #define STACK_SIZE 4096 static char stack[STACK_SIZE]; static cyg_thread thread_data; static cyg_handle_t thread_handle; // FUNCTIONS static void cyg_test_exit(void) { while (TRUE) ; } static void I2Sreset(void) { // Enable i2s interface instead of SSI#2 *(volatile cyg_uint32 *)SYSCON3 |= SYSCON3_I2SSEL | 0x200; // Configure the i2s audio interface // External clock, interrupt on right channel FIFO needs service *(volatile cyg_uint32 *)I2S_CTL = I2S_CTL_FLAG | I2S_CTL_ECS | I2S_CTL_RCTM; // Clear out status register *(volatile cyg_uint32 *)I2S_STAT = 0xFFFFFFFF; // 1's reset // Now enable the interface *(volatile cyg_uint32 *)I2S_CTL |= I2S_CTL_EN; // Turn on the FIFOs while ((*(volatile cyg_uint32 *)I2S_STAT & I2S_STAT_FIFO) == 0) ; // Wait *(volatile cyg_uint32 *)I2S_STAT = I2S_STAT_FIFO; // Reset flag *(volatile cyg_uint32 *)I2S_FIFO_CTL = I2S_FIFO_CTL_RIGHT_ENABLE; while ((*(volatile cyg_uint32 *)I2S_STAT & I2S_STAT_FIFO) == 0) ; // Wait *(volatile cyg_uint32 *)I2S_STAT = I2S_STAT_FIFO; // Reset flag *(volatile cyg_uint32 *)I2S_FIFO_CTL = I2S_FIFO_CTL_LEFT_ENABLE; while ((*(volatile cyg_uint32 *)I2S_STAT & I2S_STAT_FIFO) == 0) ; // Wait *(volatile cyg_uint32 *)I2S_STAT = I2S_STAT_FIFO; // Reset flag // Clear out status register *(volatile cyg_uint32 *)I2S_STAT = 0xFFFFFFFF; // 1's reset // Enable interrupt *(volatile cyg_uint32 *)INTMR3 |= INTSR3_I2SINT; } static void I2Sdisable(void) { // Turn off the FIFOs while ((*(volatile cyg_uint32 *)I2S_STAT & I2S_STAT_FIFO) == 0) ; // Wait *(volatile cyg_uint32 *)I2S_STAT = I2S_STAT_FIFO; // Reset flag *(volatile cyg_uint32 *)I2S_FIFO_CTL = I2S_FIFO_CTL_RIGHT_DISABLE; while ((*(volatile cyg_uint32 *)I2S_STAT & I2S_STAT_FIFO) == 0) ; // Wait *(volatile cyg_uint32 *)I2S_STAT = I2S_STAT_FIFO; // Reset flag *(volatile cyg_uint32 *)I2S_FIFO_CTL = I2S_FIFO_CTL_LEFT_DISABLE; while ((*(volatile cyg_uint32 *)I2S_STAT & I2S_STAT_FIFO) == 0) ; // Wait *(volatile cyg_uint32 *)I2S_STAT = I2S_STAT_FIFO; // Reset flag // Disable interrupt *(volatile cyg_uint32 *)INTMR3 &= ~INTSR3_I2SINT; // Disable the interface *(volatile cyg_uint32 *)I2S_CTL = 0; } static void idle(void) { // Do nothing } static void audio_exercise(cyg_addrword_t p) { int sample, len; bool started; diag_printf("AUDIO test here!\n"); // Enable my special FIQ handler HAL_VSR_SET(CYGNUM_HAL_VECTOR_FIQ, i2s_FIQ, NULL); while (TRUE) { diag_printf("... Starting over\n"); // Set up pointers cur_buf.length = 0; next_buf.length = 0; sample = 0; started = false; // Send out the data while (sample != NUM_PCM_SAMPLES) { if (next_buf.length == 0) { // Move some data into the "next" buffer next_buf.left_chan_ptr = &left_channel[sample]; next_buf.right_chan_ptr = &right_channel[sample]; len = NUM_PCM_SAMPLES - sample; if (len > CHUNK_LENGTH) len = CHUNK_LENGTH; next_buf.length = len; idle(); if (!started) { started = true; // Initialize audio interface I2Sreset(); } sample += len; } } // Wait for all data to be sent while (cur_buf.length != 0) { } // Shut off audio interface I2Sdisable(); } diag_printf("All done!\n"); cyg_test_exit(); } externC void cyg_start( void ) { // Create a main thread, so we can run the scheduler and have time 'pass' cyg_thread_create(11, // Priority - just a number audio_exercise, // entry 0, // initial parameter "AUDIO_thread", // Name &stack[0], // Stack STACK_SIZE, // Size &thread_handle, // Handle &thread_data // Thread data structure ); cyg_thread_resume(thread_handle); // Start it // Let 'em fly... cyg_scheduler_start(); } // cyg_package_start()
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