sam/components/audio/codec/wm8731/unit_tests/unit_tests.c File Reference

Unit tests for WM8731 module.

Copyright (c) 2012-2018 Microchip Technology Inc. and its subsidiaries.

#include <stdint.h>
#include <stdbool.h>
#include <board.h>
#include <sysclk.h>
#include <string.h>
#include <unit_test/suite.h>
#include <stdio_serial.h>
#include <conf_test.h>
#include "conf_board.h"
#include "conf_clock.h"
#include "conf_wm8731.h"
#include "wm8731.h"
#include "ssc.h"
#include "dmac.h"
#include "twi_master.h"

Macros
#define	BITS_BY_SLOT   (16)
	Bits per slot. More...
#define	DMA_CH   0
#define	SAMPLE_RATE   (48000)
	Wav feature. More...
#define	SLOT_BY_FRAME   (2)
	Wav slot per frame. More...
#define	WAV_LENGTH   (0xA0u)
	Bits per slot. More...

Functions
void	DMAC_Handler (void)
	ISR for DMA interrupt. More...
static void	init_dac (void)
	Initial the codec for audio play. More...
static void	init_dma (void)
	DMA driver configuration. More...
static void	init_ssc (void)
	Initial the ssc interface. More...
static void	init_twi_wm8731 (void)
int	main (void)
	Run WM8731 module unit tests. More...
static void	run_wm8731_transfer_test (const struct test_case *test)
	WM8731 transfer test. More...
static void	ssc_dma (void *p_buffer, uint16_t us_size)
	Start DMA sending data. More...

Variables
volatile uint32_t	ul_transfer_done = 0
	Transfer done flag. More...
const uint8_t	wav_data [WAV_LENGTH]
	wav data from the file "sample.wav" More...

#define BITS_BY_SLOT   (16)

Bits per slot.

Referenced by init_ssc().

#define DMA_CH   0

Referenced by DMAC_Handler(), init_dma(), and ssc_dma().

#define SAMPLE_RATE   (48000)

Wav feature.

Referenced by init_ssc().

#define SLOT_BY_FRAME   (2)

Wav slot per frame.

#define WAV_LENGTH   (0xA0u)

Bits per slot.

Referenced by run_wm8731_transfer_test().

void DMAC_Handler

(

void

)

ISR for DMA interrupt.

References DMA_CH, dmac_channel_stop_transfer(), dmac_get_status(), ssc_disable_tx(), and ul_transfer_done.

static void init_dac ( void  )

static

Initial the codec for audio play.

References init_twi_wm8731(), pmc_disable_pck(), pmc_enable_pck(), PMC_PCK_0, pmc_switch_pck_to_mainck(), wm8731_dac_select(), wm8731_power_mode_dac(), WM8731_REG_DIGITAL_AUDIO_INTERFACE_FORMAT_I2S, WM8731_REG_DIGITAL_AUDIO_INTERFACE_FORMAT_IWL_16_BIT, wm8731_reset(), wm8731_set_active(), wm8731_set_dac_soft_mute(), wm8731_set_digital_audio_data_bit_length(), and wm8731_set_sampling_control().

Referenced by main().

static void init_dma ( void  )

static

DMA driver configuration.

References DMA_CH, dmac_channel_disable(), dmac_channel_set_configuration(), dmac_enable(), dmac_enable_interrupt(), dmac_init(), DMAC_PRIORITY_ROUND_ROBIN, dmac_set_priority_mode(), and pmc_enable_periph_clk().

Referenced by main().

static void init_ssc ( void  )

static

Initial the ssc interface.

References BITS_BY_SLOT, pmc_enable_periph_clk(), SAMPLE_RATE, ssc_disable_interrupt(), ssc_disable_tx(), ssc_reset(), ssc_set_clock_divider(), ssc_set_transmitter(), sysclk_get_peripheral_hz(), clock_opt_t::ul_ckg, clock_opt_t::ul_cki, clock_opt_t::ul_cko, clock_opt_t::ul_cks, data_frame_opt_t::ul_datlen, data_frame_opt_t::ul_datnb, data_frame_opt_t::ul_fsedge, data_frame_opt_t::ul_fslen, data_frame_opt_t::ul_fslen_ext, data_frame_opt_t::ul_fsos, data_frame_opt_t::ul_msbf, clock_opt_t::ul_period, clock_opt_t::ul_start_sel, and clock_opt_t::ul_sttdly.

Referenced by main().

static void init_twi_wm8731 ( void  )

static

References twi_options::chip, twi_options::master_clk, twi_options::speed, sysclk_get_peripheral_hz(), twi_master_setup(), TWI_WM8731, and WM8731_SLAVE_ADDRESS.

Referenced by init_dac().

int main

(

void

)

Run WM8731 module unit tests.

References at24cxx_reset(), uart_rs232_options::baudrate, board_init(), DEFINE_TEST_ARRAY, DEFINE_TEST_CASE, DEFINE_TEST_SUITE, init_dac(), init_dma(), init_ssc(), NULL, run_wm8731_transfer_test(), stdio_serial_init(), sysclk_enable_peripheral_clock(), sysclk_init(), and test_suite_run().

static void run_wm8731_transfer_test ( const struct test_case *  test )

static

WM8731 transfer test.

Parameters

test	Current test case.

References ssc_dma(), test_assert_true, ul_transfer_done, wav_data, and WAV_LENGTH.

Referenced by main().

static void ssc_dma ( void *  p_buffer, uint16_t  us_size  )

static

Start DMA sending data.

Parameters

p_buffer	Pointer to the data to be transmitted.
us_size	Size of the data to be transmitted.

References DMA_CH, dmac_channel_enable(), dmac_channel_single_buf_transfer_init(), NULL, ssc_enable_tx(), dma_transfer_descriptor_t::ul_ctrlA, dma_transfer_descriptor_t::ul_ctrlB, dma_transfer_descriptor_t::ul_descriptor_addr, dma_transfer_descriptor_t::ul_destination_addr, and dma_transfer_descriptor_t::ul_source_addr.

Referenced by run_wm8731_transfer_test().

volatile uint32_t ul_transfer_done = 0

Transfer done flag.

Referenced by DMAC_Handler(), and run_wm8731_transfer_test().

const uint8_t wav_data[WAV_LENGTH]

Initial value:

= {
    0xd8, 0x01, 0x06, 0x01, 0xd4, 0x01, 0x0e, 0x01,
    0xd2, 0x01, 0x18, 0x01, 0xd3, 0x01, 0x20, 0x01,
    0xcd, 0x01, 0x21, 0x01, 0xca, 0x01, 0x23, 0x01,
    0xc6, 0x01, 0x2a, 0x01, 0xbe, 0x01, 0x2d, 0x01,
    0xb7, 0x01, 0x30, 0x01, 0xb4, 0x01, 0x38, 0x01,
    0xb2, 0x01, 0x39, 0x01, 0xae, 0x01, 0x3c, 0x01,
    0xae, 0x01, 0x45, 0x01, 0xaa, 0x01, 0x43, 0x01,
    0xa4, 0x01, 0x3e, 0x01, 0x9d, 0x01, 0x3b, 0x01,
    0x8c, 0x01, 0x30, 0x01, 0x81, 0x01, 0x29, 0x01,
    0x81, 0x01, 0x27, 0x01, 0x81, 0x01, 0x23, 0x01,
    0x82, 0x01, 0x1d, 0x01, 0x84, 0x01, 0x1c, 0x01,
    0x80, 0x01, 0x19, 0x01, 0x7e, 0x01, 0x17, 0x01,
    0x7d, 0x01, 0x12, 0x01, 0x77, 0x01, 0x0c, 0x01,
    0x78, 0x01, 0x0a, 0x01, 0x7a, 0x01, 0x0b, 0x01,
    0x78, 0x01, 0x04, 0x01, 0x75, 0x01, 0xff, 0x00,
    0x77, 0x01, 0x04, 0x01, 0x73, 0x01, 0x09, 0x01,
    0x6f, 0x01, 0x0b, 0x01, 0x6f, 0x01, 0x0c, 0x01,
    0x71, 0x01, 0x08, 0x01, 0x74, 0x01, 0x10, 0x01
}

wav data from the file "sample.wav"

Referenced by run_wm8731_transfer_test().