工程目录：AiPi-Open-Kits/ AiPi-Audio
文件目录：AiPi-Open-Kits/ AiPi-Audio/main.c
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ES8388该样例下载后，可以通过mic录音，喇叭播放
main 工程代码： -------------------------------------------------- /** * @file main.c * @brief * * Copyright (c) 2021 Bouffalolab team * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * * */ 加载各种头文件 #include "board.h" #include "bflb_gpio.h" #include "bflb_l1c.h" #include "bflb_mtimer.h" #include "bflb_i2c.h" #include "bl616_glb.h" #include "bflb_dma.h" #include "bsp_es8388.h" #include "bflb_i2s.h"
// 8388 struct bflb_device_s *i2s0; struct bflb_device_s *dma0_ch0; struct bflb_device_s *dma0_ch1;
ATTR_NOCACHE_RAM_SECTION uint8_t rx_buffer[32000]; //属性缓存RAM部分
static ES8388_Cfg_Type ES8388Cfg = { //ES8388 结构体 .work_mode = ES8388_CODEC_MDOE, /*!< ES8388 work mode */ //ES8388工作模式 .role = ES8388_SLAVE, /*!< ES8388 role */ //ES8388角色 .mic_input_mode = ES8388_DIFF_ENDED_MIC, /*!< ES8388 mic input mode */ .mic_pga = ES8388_MIC_PGA_0DB, /*!< ES8388 mic PGA */ .i2s_frame = ES8388_LEFT_JUSTIFY_FRAME, /*!< ES8388 I2S frame */ .data_width = ES8388_DATA_LEN_16, /*!< ES8388 I2S dataWitdh */ };
void dma0_ch0_isr(void *arg) { printf("tc done\r\n"); }
void dma0_ch1_isr(void *arg) { printf("rx done\r\n"); }
void i2s_gpio_init() { struct bflb_device_s *gpio; gpio = bflb_device_get_by_name("gpio");
/* I2S_FS */ // bflb_gpio_init(gpio, GPIO_PIN_13, GPIO_FUNC_I2S | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1); // /* I2S_DI */ // bflb_gpio_init(gpio, GPIO_PIN_14, GPIO_FUNC_I2S | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1); // /* I2S_DO */ // bflb_gpio_init(gpio, GPIO_PIN_15, GPIO_FUNC_I2S | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1); // /* I2S_BCLK */ // bflb_gpio_init(gpio, GPIO_PIN_20, GPIO_FUNC_I2S | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1); // /* MCLK CLKOUT */ // bflb_gpio_init(gpio, GPIO_PIN_23, GPIO_FUNC_CLKOUT | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
// /* I2C0_SCL */ // bflb_gpio_init(gpio, GPIO_PIN_10, GPIO_FUNC_I2C0 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_2); // /* I2C0_SDA */ // bflb_gpio_init(gpio, GPIO_PIN_11, GPIO_FUNC_I2C0 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_2);
/////////////// // bflb_gpio_init(gpio, GPIO_PIN_21, GPIO_FUNC_I2S | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1); bflb_gpio_init(gpio, GPIO_PIN_13, GPIO_FUNC_I2S | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1); /* I2S_DI */ bflb_gpio_init(gpio, GPIO_PIN_10, GPIO_FUNC_I2S | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1); /* I2S_DO */ bflb_gpio_init(gpio, GPIO_PIN_11, GPIO_FUNC_I2S | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1); /* I2S_BCLK */ bflb_gpio_init(gpio, GPIO_PIN_20, GPIO_FUNC_I2S | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
/* MCLK CLKOUT */ bflb_gpio_init(gpio, GPIO_PIN_14, GPIO_FUNC_CLKOUT | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
/* I2C0_SCL */ bflb_gpio_init(gpio, GPIO_PIN_0, GPIO_FUNC_I2C0 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_2); /* I2C0_SDA */ bflb_gpio_init(gpio, GPIO_PIN_1, GPIO_FUNC_I2C0 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_2); }
void i2s_dma_init() //i2s dma初始化 { static struct bflb_dma_channel_lli_pool_s tx_llipool[100]; static struct bflb_dma_channel_lli_transfer_s tx_transfers[1]; static struct bflb_dma_channel_lli_pool_s rx_llipool[100]; static struct bflb_dma_channel_lli_transfer_s rx_transfers[1];
struct bflb_i2s_config_s i2s_cfg = { //新建结构体 .bclk_freq_hz = 16000 * 16 * 2, /* bclk = Sampling_rate * frame_width * channel_num */ .role = I2S_ROLE_MASTER, .format_mode = I2S_MODE_LEFT_JUSTIFIED, .channel_mode = I2S_CHANNEL_MODE_NUM_2, .frame_width = I2S_SLOT_WIDTH_16, .data_width = I2S_SLOT_WIDTH_16, .fs_offset_cycle = 0,
.tx_fifo_threshold = 0, .rx_fifo_threshold = 0, };
struct bflb_dma_channel_config_s tx_config = { //flb dma信道配置tx配置 .direction = DMA_MEMORY_TO_PERIPH, .src_req = DMA_REQUEST_NONE, .dst_req = DMA_REQUEST_I2S_TX, .src_addr_inc = DMA_ADDR_INCREMENT_ENABLE, .dst_addr_inc = DMA_ADDR_INCREMENT_DISABLE, .src_burst_count = DMA_BURST_INCR1, .dst_burst_count = DMA_BURST_INCR1, .src_width = DMA_DATA_WIDTH_16BIT, .dst_width = DMA_DATA_WIDTH_16BIT, };
struct bflb_dma_channel_config_s rx_config = { //flb dma信道配置rx配置 .direction = DMA_PERIPH_TO_MEMORY, .src_req = DMA_REQUEST_I2S_RX, .dst_req = DMA_REQUEST_NONE, .src_addr_inc = DMA_ADDR_INCREMENT_DISABLE, .dst_addr_inc = DMA_ADDR_INCREMENT_ENABLE, .src_burst_count = DMA_BURST_INCR1, .dst_burst_count = DMA_BURST_INCR1, .src_width = DMA_DATA_WIDTH_16BIT, .dst_width = DMA_DATA_WIDTH_16BIT }; printf("i2s init\r\n"); i2s0 = bflb_device_get_by_name("i2s0"); /* i2s init */ //初始化i2s bflb_i2s_init(i2s0, &i2s_cfg); /* enable dma */ //启动 dma bflb_i2s_link_txdma(i2s0, true); bflb_i2s_link_rxdma(i2s0, true);
printf("dma init\r\n"); dma0_ch0 = bflb_device_get_by_name("dma0_ch0"); dma0_ch1 = bflb_device_get_by_name("dma0_ch1");
bflb_dma_channel_init(dma0_ch0, &tx_config); bflb_dma_channel_init(dma0_ch1, &rx_config);
bflb_dma_channel_irq_attach(dma0_ch0, dma0_ch0_isr, NULL); bflb_dma_channel_irq_attach(dma0_ch1, dma0_ch1_isr, NULL);
tx_transfers[0].src_addr = (uint32_t)rx_buffer; tx_transfers[0].dst_addr = (uint32_t)DMA_ADDR_I2S_TDR; tx_transfers[0].nbytes = sizeof(rx_buffer);
rx_transfers[0].src_addr = (uint32_t)DMA_ADDR_I2S_RDR; rx_transfers[0].dst_addr = (uint32_t)rx_buffer; rx_transfers[0].nbytes = sizeof(rx_buffer);
printf("dma lli init\r\n"); uint32_t num = bflb_dma_channel_lli_reload(dma0_ch0, tx_llipool, 100, tx_transfers, 1); bflb_dma_channel_lli_link_head(dma0_ch0, tx_llipool, num); printf("tx dma lli num: %d \r\n", num); num = bflb_dma_channel_lli_reload(dma0_ch1, rx_llipool, 100, rx_transfers, 1); printf("rx dma lli num: %d \r\n", num); bflb_dma_channel_lli_link_head(dma0_ch1, rx_llipool, num); bflb_dma_channel_start(dma0_ch0); bflb_dma_channel_start(dma0_ch1); }
void mclk_out_init() //输出时钟初始化 { /* output MCLK, Will change the clock source of i2s, //将改变i2s的时钟源， It needs to be called before i2s is initialized //在初始化i2s之前需要调用它 clock source 25M //时钟源25M */ GLB_Set_I2S_CLK(ENABLE, 2, GLB_I2S_DI_SEL_I2S_DI_INPUT, GLB_I2S_DO_SEL_I2S_DO_OUTPT); // GLB_Set_Chip_Clock_Out3_Sel(GLB_CHIP_CLK_OUT_3_I2S_REF_CLK); GLB_Set_Chip_Clock_Out2_Sel(GLB_CHIP_CLK_OUT_2_I2S_REF_CLK); }
int main(void) //主函数 { board_init(); //开发板初始化 printf("lvgl case\r\n"); //lvgl 示例
/* gpio init */ i2s_gpio_init(); //gpio初始化 /* mclk clkout init */ mclk_out_init(); //输出时钟初始化
/* init ES8388 Codec */ printf("es8388 init\n\r"); ES8388_Init(&ES8388Cfg); //初始化 ES8388_Set_Voice_Volume(90); //设置音量
/* i2s init */ i2s_dma_init(); //初始化
/* enable i2s tx and rx */ //启动I2s 的输入 输出 bflb_i2s_feature_control(i2s0, I2S_CMD_DATA_ENABLE, I2S_CMD_DATA_ENABLE_TX | I2S_CMD_DATA_ENABLE_RX);
while (1) { //无限循环 bflb_mtimer_delay_ms(1); //延时1毫秒函数 } }
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