【NXP LPC54110试用体验】语音电子书播放（结项）

开发板

本帖最后由可乐丸子于 2017-9-12 21:21 编辑

下面介绍在NXP LPC54110开发板上实现语音电子书播放的方法，实现这个功能需要驱动SPI通讯的SD卡，另外需要MP3解码库，根据官方SDK修改，官方音频库是基于RT-THREAD操作系统首先介绍SPI驱动SD卡的方法，需要修改下面文件的第311行

/lpc5411x_audio/Libraries/lpc_chip/chip_5410x/syscon_5411x.h

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将下面代码

RESET_UtiCK = 10,

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改为

RESET_UTICK = 32 + 10,

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然后修改下面文件

/lpc5411x_audio/drivers/drv_i2c.c

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将I2C_SCL_PORT、I2C_SCL_PIN、I2C_SDA_PORT数值设置为1，将I2C_SDA_PIN数值设置为2

#define GPIO_PORT_I2C_SCL
#define I2C_SCL_PORT 1
#define I2C_SCL_PIN 1
#define GPIO_PORT_I2C_SDA
#define I2C_SDA_PORT 1
#define I2C_SDA_PIN 2

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void rt_hw_i2c_init(void)函数中的iic 初始化修改如下

Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 1, IOCON_FUNC5 | IOCON_DIGITAL_EN | IOCON_FASTI2C_EN);
Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 2, IOCON_FUNC5 | IOCON_DIGITAL_EN | IOCON_FASTI2C_EN);

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修改下面文件

/lpc5411x_audio/drivers/drv_i2s_wm8904.c

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修改GPIO_Configuration为如下

static void codec_gpio_config(void) //GPIO_Configuration(void)
{
rt_kprintf("codec_gpio_configrn");
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 5, IOCON_FUNC1 | IOCON_DIGITAL_EN);
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 6, IOCON_FUNC1 | IOCON_DIGITAL_EN);
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 7, IOCON_FUNC1 | IOCON_DIGITAL_EN);
Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 12, IOCON_FUNC4 | IOCON_DIGITAL_EN);
Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 13, IOCON_FUNC4 | IOCON_DIGITAL_EN);
Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 14, IOCON_FUNC4 | IOCON_DIGITAL_EN);
}

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修改下面文件

/lpc5411x_audio/drivers/drv_spi.c

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增加下面宏

#define SPI2_FLEXCOMM 2
#define MY_SPI LPC_SPI2
#define MY_DMA_CH_RX DMA_CH4
#define MY_DMA_CH_TX DMA_CH5

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SPI2 Defines定义如下

/* SPI2 Defines */
#define LPC_SPI2_BASE __APPEND3(LPC_FLEXCOMM,SPI2_FLEXCOMM,_BASE)
#define LPC_SPI2 ((LPC_SPI_T *) LPC_SPI2_BASE)
#define SPI2_IRQHandler __APPEND3(FLEXCOMM,SPI2_FLEXCOMM,_IRQHandler)
#define SPI2_IRQn __APPEND3(FLEXCOMM,SPI2_FLEXCOMM,_IRQn)
#define DMAREQ_SPI2_RX __APPEND3(DMAREQ_FLEXCOMM,SPI2_FLEXCOMM,_RX)
#define DMAREQ_SPI2_TX __APPEND3(DMAREQ_FLEXCOMM,SPI2_FLEXCOMM,_TX)

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然后使用文本替换功能将LPC_SPI1全部替换为LPC_SPI1，将DMA_CH6全部替换为MY_DMA_CH_RX，将DMA_CH7全部替换为MY_DMA_CH_TX
最后将Connect the SPI1 signals to port pins部分做如下修改

/* Connect the SPI1 signals to port pins */
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 10, (IOCON_FUNC1 | IOCON_MODE_PULLUP | IOCON_DIGITAL_EN)); /* SPI1_SCK */
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 8, (IOCON_FUNC1 | IOCON_MODE_PULLUP | IOCON_DIGITAL_EN)); /* SPI1_MOSI */
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 9, (IOCON_FUNC1 | IOCON_MODE_PULLUP | IOCON_DIGITAL_EN)); /* SPI1_MISO */
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 3, (IOCON_FUNC0 | IOCON_MODE_PULLUP | IOCON_DIGITAL_EN)); /* SPI1_SSEL0 */
Chip_GPIO_SetPinDIROutput(LPC_GPIO, 0, 3);
Chip_GPIO_SetPinState(LPC_GPIO, 0, 3, 1UL);

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所有的cs引脚都替换为P0_3

if(message->cs_take)
{
Chip_GPIO_SetPinState(LPC_GPIO, 0, 3, 0UL);
}

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/* release CS */
if(message->cs_release) {
Chip_GPIO_SetPinState(LPC_GPIO, 0, 3, 1UL);
}

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void rt_hw_spi_init(void)
{
static struct lpc54110_spi_bus lpc_spi;
static struct lpc54110_spi_cs spi_cs;
static struct rt_spi_device spi_device;
spi_cs.GPIOx = LPC_GPIO;
spi_cs.GPIO_Port = 0;
spi_cs.GPIO_Pin = 3;
lpc_spi_register(MY_SPI, &lpc_spi, "spi1");
rt_spi_bus_attach_device(&spi_device, "spi10", "spi1", (void*)&spi_cs);
}

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然后是音频库的修改，修改外设管脚为1端口1、2脚

void rt_hw_i2c_init(void)
{
rt_kprintf("install i2c1 rn");
#ifdef RT_USING_I2C_BITOPS
Chip_IOCON_PinMuxSet(LPC_IOCON, I2C_SDA_PORT, I2C_SDA_PIN, IOCON_FUNC0 | IOCON_DIGITAL_EN | IOCON_MODE_PULLUP);
Chip_IOCON_PinMuxSet(LPC_IOCON, I2C_SCL_PORT, I2C_SCL_PIN, IOCON_FUNC0 | IOCON_DIGITAL_EN | IOCON_MODE_PULLUP);
Chip_GPIO_SetPinDIROutput(LPC_GPIO, I2C_SDA_PORT, I2C_SDA_PIN);
Chip_GPIO_SetPinState(LPC_GPIO, I2C_SDA_PORT, I2C_SDA_PIN, 1UL);
Chip_GPIO_SetPinDIROutput(LPC_GPIO, I2C_SCL_PORT, I2C_SCL_PIN);
Chip_GPIO_SetPinState(LPC_GPIO, I2C_SCL_PORT, I2C_SCL_PIN, 1UL);
rt_memset((void *)&i2c_device, 0, sizeof(struct rt_i2c_bus_device));
i2c_device.priv = (void *)&bit_ops;
rt_i2c_bit_add_bus(&i2c_device, "i2c1");
#else
// Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 25, IOCON_FUNC1 | IOCON_DIGITAL_EN | IOCON_FASTI2C_EN);
// Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 26, IOCON_FUNC1 | IOCON_DIGITAL_EN | IOCON_FASTI2C_EN);
Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 1, IOCON_FUNC5 | IOCON_DIGITAL_EN | IOCON_FASTI2C_EN);
Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 2, IOCON_FUNC5 | IOCON_DIGITAL_EN | IOCON_FASTI2C_EN);
Chip_I2C_Init(LPC_I2C0);
Chip_I2C_SetClockDiv(LPC_I2C0, 20);
Chip_I2CM_SetBusSpeed(LPC_I2C0, 100000);
Chip_I2CM_Enable(LPC_I2C0);
rt_memset((void *)&lpc54110_i2c1, 0, sizeof(struct rt_i2c_bus_device));
lpc54110_i2c1.ops = &i2c1_ops;
rt_i2c_bus_device_register(&lpc54110_i2c1, "i2c1");
#endif
}

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修改rt_err_t codec_hw_init使用使用i2c1初始化

rt_err_t codec_hw_init(const char * i2c_bus_device_name)
{
struct rt_i2c_bus_device * i2c_device;
uint32_t ret;
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 21, (IOCON_FUNC1 | IOCON_MODE_INACT | IOCON_DIGITAL_EN));
Chip_Clock_SetCLKOUTSource(SYSCON_CLKOUTSRC_MAINCLK, 1);
rt_kprintf("read file pagern");
ret = Chip_Clock_GetMainClockRate();
rt_kprintf("MainClk %d ", ret);
ret = Chip_Clock_GetSystemClockRate();
rt_kprintf("SysClk %d rn", ret);
rt_kprintf("codec_hw_init_beginrn");
i2c_device = rt_i2c_bus_device_find(i2c_bus_device_name);
if(i2c_device == RT_NULL)
{
rt_kprintf("i2c bus device %s not found!rn", i2c_bus_device_name);
return -RT_ENOSYS;
}
codec.i2c_device = i2c_device;
/* Stop auto trimming of the FRO from USB */
//Chip_USB_TrimOff(0);
#if Magicoe
LPC_SYSCON->FROCTRL = LPC_SYSCON->FROCTRL & ~(SYSCON_FROCTRL_MASK | SYSCON_FROCTRL_USBCLKADJ);
Chip_Clock_SetMainClockSource(SYSCON_MAINCLKSRC_FRO12MHZ);
Chip_Clock_SetSystemPLLSource(SYSCON_PLLCLKSRC_FRO12MHZ);
Chip_Clock_SetPLLFreq(&pll_setup_48KHz);
//Chip_Clock_SetPLLFreq(&pllSetup);
Chip_Clock_SetMainClockSource(SYSCON_MAINCLKSRC_PLLOUT);
Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 17, (IOCON_FUNC4 | IOCON_MODE_INACT | IOCON_DIGITAL_EN));
Chip_Clock_SetMCLKDirOutput();
Chip_Clock_SetMCLKClockSource(SYSCON_MCLKSRC_PLL, 2);
Chip_SYSCON_SetFLASHAccess(SYSCON_FLASH_3CYCLE);
#else
Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 17, (IOCON_FUNC4 | IOCON_MODE_INACT | IOCON_DIGITAL_EN));
Chip_Clock_SetMCLKDirOutput();
Chip_Clock_SetMCLKClockSource(SYSCON_MCLKSRC_PLL, (1*LPC54110_IIS_MUL));
#endif
rt_kprintf("read file pagern");
ret = Chip_Clock_GetMainClockRate();
rt_kprintf("MainClk %d ", ret);
ret = Chip_Clock_GetSystemClockRate();
rt_kprintf("SysClk %d rn", ret);
// Initial I2C here maybe
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 5, IOCON_FUNC1 | IOCON_DIGITAL_EN); // Flexcomm 6 / SDA
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 6, IOCON_FUNC1 | IOCON_DIGITAL_EN); // Flexcomm 6 / WS
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 7, IOCON_FUNC1 | IOCON_DIGITAL_EN); // Flexcomm 6 / SCK
// Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 6, IOCON_FUNC2 | IOCON_DIGITAL_EN); // Flexcomm 7 / SCK
// Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 7, IOCON_FUNC2 | IOCON_DIGITAL_EN); // Flexcomm 7 / SDA
// Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 8, IOCON_FUNC2 | IOCON_DIGITAL_EN); // Flexcomm 7 / WS
Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 12, IOCON_FUNC4 | IOCON_DIGITAL_EN); /* Flexcomm 7 / SCK */
Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 13, IOCON_FUNC4 | IOCON_DIGITAL_EN); /* Flexcomm 7 / SDA */
Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 14, IOCON_FUNC4 | IOCON_DIGITAL_EN); /* Flexcomm 7 / WS */
Chip_I2S_Init(I2S_PORT_TX, &audio_fmt_tx); // initialize I2S port
Chip_Clock_SetFLEXCOMMClockSource(I2S7_FLEXCOMM, SYSCON_FLEXCOMMCLKSELSRC_PLL);
Chip_I2S_Config(I2S_PORT_TX, &audio_fmt_tx); // configure I2S port
Chip_I2S_FIFO_Config (I2S_PORT_TX, &audio_fmt_tx); // configure I2S FIFO
Chip_I2S_FIFO_Control(I2S_PORT_TX, &audio_fmt_tx, I2S_FIFO_TXZ_ENABLE); // send zeros if no data is available
Chip_I2S_FIFO_Control(I2S_PORT_TX, &audio_fmt_tx, I2S_FIFO_ENABLE); // enable FIFO
// Chip_I2S_Init(I2S_PORT_RX, &audio_fmt_rx); // initialize I2S port
// Chip_Clock_SetFLEXCOMMClockSource(I2S6_FLEXCOMM, SYSCON_FLEXCOMMCLKSELSRC_PLL);
// Chip_I2S_Config(I2S_PORT_RX, &audio_fmt_rx); // configure I2S port
// Chip_I2S_FIFO_Config(I2S_PORT_RX, &audio_fmt_rx); // configure I2S FIFO
// Chip_I2S_FIFO_Control(I2S_PORT_RX, &audio_fmt_rx, I2S_FIFO_ENABLE); // enable FIFO
Chip_I2S_FIFO_SetInterrupt(I2S_PORT_TX, I2S_FIFO_INT_TXERR | I2S_FIFO_INT_TXLVL); // enable tx interrupts
// Chip_I2S_FIFO_SetInterrupt(I2S_PORT_RX, I2S_FIFO_INT_RXERR | I2S_FIFO_INT_RXLVL); // enable rx interrupts
/* init codec */
ret = wm8904_init();
if (ret == LPC_OK) {
//g_codec.cur_rate = DEF_SAMPLE_RATE;
/* suspend codec after init to conserve power */
//Codec_Suspend();
}
codec.parent.type = RT_Device_Class_Sound;
codec.parent.rx_indicate = RT_NULL;
codec.parent.tx_complete = RT_NULL;
codec.parent.user_data = RT_NULL;
codec.parent.control = codec_control;
codec.parent.init = codec_init;
codec.parent.open = codec_open;
codec.parent.close = codec_close;
codec.parent.read = RT_NULL;
codec.parent.write = codec_write;
/* set read_index and put index to 0 */
codec.read_index = 0;
codec.put_index = 0;
// NVIC_EnableIRQ(I2S_TX_IRQNUM); // enable tx interrupt
// Chip_I2S_Start(I2S_PORT_TX); // start tx I2S port
// NVIC_EnableIRQ(I2S_RX_IRQNUM); // enable rx interrupt
// Chip_I2S_Start(I2S_PORT_RX); // start rx I2S port
/* register the device */
return rt_device_register(&codec.parent, "snd", RT_DEVICE_FLAG_WRONLY | RT_DEVICE_FLAG_DMA_TX);
}