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//==========================================================================
//
//        lpc24xx_adc_test.c
//
//        ADC performance test for LPC24xxx
//
//==========================================================================
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//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):     Uwe Kindler
// Contributors:
// Date:          2008-11-01
// Description:   ADC performance test for LPC24xxx
//####DESCRIPTIONEND####
 
 
//===========================================================================
//                                INCLUDES
//===========================================================================
#include <pkgconf/system.h>
 
#include <cyg/infra/testcase.h>         // test macros
#include <cyg/infra/cyg_ass.h>          // assertion macros
#include <cyg/infra/diag.h>
#include <cyg/hal/hal_diag.h>
#include <cyg/hal/hal_arch.h>           // CYGNUM_HAL_STACK_SIZE_TYPICAL
 
// Package requirements
#if defined(CYGPKG_IO_ADC) && defined(CYGPKG_KERNEL)
 
#include <pkgconf/kernel.h>
#include <cyg/io/io.h>
#include <cyg/io/adc.h>
#include <pkgconf/devs_adc_arm_lpc24xx.h>
 
// Package option requirements
#if defined(CYGFUN_KERNEL_API_C)
 
#include <cyg/kernel/kapi.h>
 
#if CYGINT_DEVS_ADC_ARM_LPC24XX_CHANNELS > 0
 
//===========================================================================
//                               DATA TYPES
//===========================================================================
typedef struct st_thread_data
{
    cyg_thread   obj;
    long         stack[CYGNUM_HAL_STACK_SIZE_TYPICAL];
    cyg_handle_t hdl;
} thread_data_t;
 
 
//===========================================================================
//                              LOCAL DATA
//===========================================================================
cyg_thread_entry_t adc_thread;
thread_data_t      adc_thread_data;
 
 
//===========================================================================
//                             ADC THREAD
//===========================================================================
void adc_thread(cyg_addrword_t data)
{
    int             res;
    cyg_io_handle_t handle[8]     = {0, 0, 0, 0, 0, 0, 0, 0};
    cyg_uint32      sample_cnt[8] = {0, 0, 0, 0, 0, 0, 0, 0};
    cyg_uint32      cfg_data;
    cyg_uint32      len;
    cyg_uint32      start_time;
    cyg_uint32      end_time;
    int             i;
    cyg_uint8       seconds = 0;
    float           final_seconds;
    cyg_uint32      samples_expected;
 
 
    diag_printf("This test reads samples from all enabled ADC channels.\n"
                "Each second the number of already acquired samples\n"
                "will be printed. After 10 seconds all ADC channels\n"
                "will be stopped and each ADC buffer will be read until\n"
                "it is empty. If the number of acquired samples is much\n"
                "smaller than the number of expected samples, then you\n"
                "should lower the sample rate.\n\n");
 
    // Get a handle for ADC device 0 channel 1 - 8
    res = cyg_io_lookup( "/dev/adc00", &handle[0]);
    res = cyg_io_lookup( "/dev/adc01", &handle[1]);
    res = cyg_io_lookup( "/dev/adc02", &handle[2]);
    res = cyg_io_lookup( "/dev/adc03", &handle[3]);
    res = cyg_io_lookup( "/dev/adc04", &handle[4]);
    res = cyg_io_lookup( "/dev/adc05", &handle[5]);
    res = cyg_io_lookup( "/dev/adc06", &handle[6]);
    res = cyg_io_lookup( "/dev/adc07", &handle[7]);
 
    //
    // switch all channels to non blocking
    //
    for (i = 0; i < 8; ++i)
    {
        if (handle[i])
        {
            cfg_data = 0;
            len = sizeof(cfg_data);
            res = cyg_io_set_config(handle[i],
                                    CYG_IO_SET_CONFIG_READ_BLOCKING,
                                    &cfg_data,
                                    &len);
            if (ENOERR != res)
            {
                CYG_TEST_FAIL_FINISH("Error switching ADC channel to non blocking");
            }
            sample_cnt[i] = 0;
        } // if (handle[i])
    } // for (i = 0; i < 8; ++i)
 
    start_time = cyg_current_time();
    do
    {
        for (i = 0; i < 8; ++i)
        {
            if (handle[i])
            {
                cyg_adc_sample_t sample;
 
                // read a sample from the channel
                do
                {
                    cyg_uint32 len = sizeof(sample);
                    res = cyg_io_read( handle[i], &sample, &len );
                }
                while (-EAGAIN == res);
                if (ENOERR == res)
                {
                    sample_cnt[i]++;
                }
            } // if (handle[i])
        }
        //
        // print number of acquired samples - if one second is expired.
        // we expect that the number of acquired samples is nearly the
        // sample rate
        //
        end_time = cyg_current_time();
        if ((end_time - start_time) >= 100)
        {
            start_time = end_time;
            diag_printf("%d\t %d\t %d\t %d\t %d\t %d\t %d\t %d\n",
                        sample_cnt[0],
                        sample_cnt[1],
                        sample_cnt[2],
                        sample_cnt[3],
                        sample_cnt[4],
                        sample_cnt[5],
                        sample_cnt[6],
                        sample_cnt[7]);
            seconds++;
        } // if ((end_time - start_time) >= 100)
    } while (seconds < 10);
 
    //
    // Now stop all channels
    //
    for (i = 0; i < 8; ++i)
    {
        if (handle[i])
        {
            res = cyg_io_set_config(handle[i],
                                    CYG_IO_SET_CONFIG_ADC_DISABLE,
                                    0,
                                    0);
            if (ENOERR != res)
            {
                CYG_TEST_FAIL_FINISH("Error disabling ADC channel");
            }
        } // if (handle[i])
    }
    end_time = cyg_current_time();
    end_time = seconds * 1000 + (end_time - start_time) * 10;
    final_seconds = end_time / 1000.0;
 
    //
    // Now read all remaining samples from buffer
    //
    for (i = 0; i < 8; ++i)
    {
        if (handle[i])
        {
            do
            {
                cyg_adc_sample_t sample;
                cyg_uint32 len = sizeof(sample);
                res = cyg_io_read( handle[i], &sample, &len );
                if (ENOERR == res)
                {
                    sample_cnt[i]++;
                }
            } while (ENOERR == res);
        } // if (handle[i])
    }
 
    diag_printf("\n\n----------------------------------------\n");
    samples_expected = final_seconds * CYGNUM_DEVS_ADC_ARM_LPC24XX_DEFAULT_RATE;
    diag_printf("Samples expected after %d milliseconds: %d\n",
                end_time, samples_expected);
    diag_printf("Samples read (per channel):\n");
    diag_printf("%d\t %d\t %d\t %d\t %d\t %d\t %d\t %d\n",
                sample_cnt[0],
                sample_cnt[1],
                sample_cnt[2],
                sample_cnt[3],
                sample_cnt[4],
                sample_cnt[5],
                sample_cnt[6],
                sample_cnt[7]);
 
    CYG_TEST_PASS_FINISH("ADC test OK");
}
 
 
void
cyg_start(void)
{
    CYG_TEST_INIT();
 
    //
    // create the main ADC test thread
    //
    cyg_thread_create(4, adc_thread,
                      (cyg_addrword_t) 0,
                      "lpc24xx_adc_thread",
                      (void *) adc_thread_data.stack,
                      1024 * sizeof(long),
                      &adc_thread_data.hdl,
                      &adc_thread_data.obj);
 
    cyg_thread_resume(adc_thread_data.hdl);
 
    cyg_scheduler_start();
}
#else // CYGINT_DEVS_ADC_ARM_LPC24XX_CHANNELS > 0
#define N_A_MSG "Needs at least one enabled ADC channel"
#endif
 
#else // CYGFUN_KERNEL_API_C
#define N_A_MSG "Needs kernel C API"
#endif
 
#else // CYGPKG_IO_ADC && CYGPKG_KERNEL
#define N_A_MSG "Needs Kernel and ADC support"
#endif
 
#ifdef N_A_MSG
void
cyg_start( void )
{
    CYG_TEST_INIT();
    CYG_TEST_NA(N_A_MSG);
}
#endif // N_A_MSG
 
 
// EOF can_tx.c
 
//---------------------------------------------------------------------------
// eof i2c_test.c