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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-11-14 ZeroFree first implementation
*/
#include <rtthread.h>
#include <rthw.h>
#include <rtdevice.h>
#include <string.h>
#include "drv_audio.h"
#include "drv_wm8978.h"
#include <stm32f4xx.h>
#define DBG_ENABLE
#define DBG_LEVEL DBG_INFO
#define DBG_COLOR
#define DBG_SECTION_NAME "MIC"
#include <rtdbg.h>
struct micphone_device
{
struct rt_device parent;
rt_uint16_t *recv_fifo;
struct rt_audio_pipe record_pipe;
/* i2c mode */
struct rt_i2c_bus_device *i2c_device;
};
#define AUDIO_RECV_BUFFER_SIZE (2048)
extern SAI_HandleTypeDef SAI1B_Handler;
extern DMA_HandleTypeDef SAI1_RXDMA_Handler;
extern SAI_HandleTypeDef SAI1A_Handler;
extern DMA_HandleTypeDef SAI1_TXDMA_Handler;
static struct micphone_device micphone;
static uint16_t send_fifo[2] = {0, 0};
static void SAIB_Init(void)
{
HAL_SAI_DeInit(&SAI1B_Handler);
SAI1B_Handler.Instance = SAI1_Block_B;
SAI1B_Handler.Init.AudioMode = SAI_MODESLAVE_RX;
SAI1B_Handler.Init.Synchro = SAI_SYNCHRONOUS;
SAI1B_Handler.Init.OutputDrive = SAI_OUTPUTDRIVE_ENABLE;
SAI1B_Handler.Init.NoDivider = SAI_MASTERDIVIDER_ENABLE;
SAI1B_Handler.Init.FIFOThreshold = SAI_FIFOTHRESHOLD_1QF;
SAI1B_Handler.Init.ClockSource = SAI_CLKSOURCE_PLLI2S;
SAI1B_Handler.Init.MonoStereoMode = SAI_MONOMODE;
SAI1B_Handler.Init.Protocol = SAI_FREE_PROTOCOL;
SAI1B_Handler.Init.DataSize = SAI_DATASIZE_16;
SAI1B_Handler.Init.FirstBit = SAI_FIRSTBIT_MSB;
SAI1B_Handler.Init.ClockStrobing = SAI_CLOCKSTROBING_RISINGEDGE;
SAI1B_Handler.FrameInit.FrameLength = 64;
SAI1B_Handler.FrameInit.ActiveFrameLength = 32;
SAI1B_Handler.FrameInit.FSDefinition = SAI_FS_CHANNEL_IDENTIFICATION;
SAI1B_Handler.FrameInit.FSPolarity = SAI_FS_ACTIVE_LOW;
SAI1B_Handler.FrameInit.FSOffset = SAI_FS_BEFOREFIRSTBIT;
SAI1B_Handler.SlotInit.FirstBitOffset = 0;
SAI1B_Handler.SlotInit.SlotSize = SAI_SLOTSIZE_32B;
SAI1B_Handler.SlotInit.SlotNumber = 2;
SAI1B_Handler.SlotInit.SlotActive = SAI_SLOTACTIVE_0 | SAI_SLOTACTIVE_1;
HAL_SAI_Init(&SAI1B_Handler);
__HAL_SAI_ENABLE(&SAI1B_Handler);
SAIA_RX_DMAx_CLK_ENABLE();
__HAL_LINKDMA(&SAI1B_Handler, hdmarx, SAI1_RXDMA_Handler);
SAI1_RXDMA_Handler.Instance = SAIA_RX_DMAx_STREAM;
SAI1_RXDMA_Handler.Init.Channel = SAIA_RX_DMAx_CHANNEL;
SAI1_RXDMA_Handler.Init.Direction = DMA_PERIPH_TO_MEMORY;
SAI1_RXDMA_Handler.Init.PeriphInc = DMA_PINC_DISABLE;
SAI1_RXDMA_Handler.Init.MemInc = DMA_MINC_ENABLE;
SAI1_RXDMA_Handler.Init.PeriphDataAlignment = SAIA_RX_DMAx_PERIPH_DATA_SIZE;
SAI1_RXDMA_Handler.Init.MemDataAlignment = SAIA_RX_DMAx_MEM_DATA_SIZE;
SAI1_RXDMA_Handler.Init.Mode = DMA_CIRCULAR;
SAI1_RXDMA_Handler.Init.Priority = DMA_PRIORITY_MEDIUM;
SAI1_RXDMA_Handler.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
SAI1_RXDMA_Handler.Init.MemBurst = DMA_MBURST_SINGLE;
SAI1_RXDMA_Handler.Init.PeriphBurst = DMA_PBURST_SINGLE;
HAL_DMA_DeInit(&SAI1_RXDMA_Handler);
HAL_DMA_Init(&SAI1_RXDMA_Handler);
HAL_NVIC_SetPriority(SAIA_RX_DMAx_IRQ, 0, 1);
HAL_NVIC_EnableIRQ(SAIA_RX_DMAx_IRQ);
}
void SAIA_RX_DMAx_IRQHandler(void)
{
HAL_DMA_IRQHandler(&SAI1_RXDMA_Handler);
}
void HAL_SAI_RxHalfCpltCallback(SAI_HandleTypeDef *hsai)
{
if (hsai == &SAI1B_Handler)
{
rt_device_write(&micphone.record_pipe.parent, 0, micphone.recv_fifo, AUDIO_RECV_BUFFER_SIZE / 2);
}
}
void HAL_SAI_RxCpltCallback(SAI_HandleTypeDef *hsai)
{
if (hsai == &SAI1B_Handler)
{
rt_device_write(&micphone.record_pipe.parent, 0, micphone.recv_fifo + (AUDIO_RECV_BUFFER_SIZE / 4), AUDIO_RECV_BUFFER_SIZE / 2);
}
}
static rt_err_t micphone_init(rt_device_t dev)
{
SAIB_Init();
return RT_EOK;
}
static rt_err_t micphone_open(rt_device_t dev, rt_uint16_t oflag)
{
struct micphone_device *mic = RT_NULL;
mic = (struct micphone_device *)dev;
if (oflag & RT_DEVICE_OFLAG_RDONLY)
{
LOG_I("Open Micphone Device!");
rt_device_open(&mic->record_pipe.parent, RT_DEVICE_OFLAG_RDONLY);
/* Disable DMA Interruption */
__HAL_DMA_DISABLE_IT(&SAI1_TXDMA_Handler, DMA_IT_TC | DMA_IT_HT);
HAL_DMA_Start(&SAI1_TXDMA_Handler, (uint32_t)&send_fifo[0], (uint32_t)&SAI1_Block_A->DR, 2);
/* Start RX DMA */
HAL_SAI_Receive_DMA(&SAI1B_Handler, (uint8_t *)(micphone.recv_fifo), AUDIO_RECV_BUFFER_SIZE / 2);
}
return RT_EOK;
}
static rt_size_t micphone_read(rt_device_t dev, rt_off_t pos,
void *buffer, rt_size_t size)
{
struct micphone_device *mic = RT_NULL;
mic = (struct micphone_device *)dev;
return rt_device_read(&mic->record_pipe.parent, pos, buffer, size);
}
static rt_err_t micphone_control(rt_device_t dev, int cmd, void *args)
{
rt_err_t value, result = RT_EOK;
switch (cmd)
{
case CODEC_CMD_SET_VOLUME:
{
// TODO
break;
}
case CODEC_CMD_SAMPLERATE:
{
value = *(int *)args;
LOG_I("Set Samplerate %d", value);
result = SAIA_SampleRate_Set(value);
break;
}
default:
break;
}
return result;
}
static rt_err_t micphone_close(rt_device_t dev)
{
struct micphone_device *mic = RT_NULL;
mic = (struct micphone_device *)dev;
HAL_SAI_DMAStop(&SAI1A_Handler);
HAL_SAI_DMAStop(&SAI1B_Handler);
rt_device_close(&mic->record_pipe.parent);
LOG_I("Close Micphone Device!");
return RT_EOK;
}
int rt_hw_micphone_init(char *i2c_bus_name)
{
int result = RT_EOK;
struct micphone_device *mic = &micphone;
if (mic->recv_fifo != RT_NULL)
{
return RT_EOK;
}
mic->recv_fifo = rt_malloc(AUDIO_RECV_BUFFER_SIZE);
if (mic->recv_fifo == RT_NULL)
{
result = -RT_ENOMEM;
goto __exit;
}
memset(mic->recv_fifo, 0, AUDIO_RECV_BUFFER_SIZE);
mic->parent.type = RT_Device_Class_Sound;
mic->parent.init = micphone_init;
mic->parent.open = micphone_open;
mic->parent.control = micphone_control;
mic->parent.write = RT_NULL;
mic->parent.read = micphone_read;
mic->parent.close = micphone_close;
mic->parent.user_data = mic;
/* register the device */
rt_device_register(&mic->parent, "mic", RT_DEVICE_FLAG_RDONLY | RT_DEVICE_FLAG_DMA_RX);
rt_device_init(&mic->parent);
{
rt_uint8_t *buffer = rt_malloc(AUDIO_RECV_BUFFER_SIZE);
if (buffer == RT_NULL)
{
result = -RT_ENOMEM;
goto __exit;
}
memset(buffer, 0, AUDIO_RECV_BUFFER_SIZE);
rt_audio_pipe_init(&mic->record_pipe,
"voice",
RT_PIPE_FLAG_FORCE_WR | RT_PIPE_FLAG_BLOCK_RD,
buffer,
AUDIO_RECV_BUFFER_SIZE);
}
return RT_EOK;
__exit:
if (mic->recv_fifo)
{
rt_free(mic->recv_fifo);
mic->recv_fifo = RT_NULL;
}
return result;
}
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