#include "m62429.h"

// 第一级音量定义
#define    MainVol_0dB            0x15      // 0dB
#define    MainVol_n4dB           0x14      // -4dB
#define    MainVol_n8dB           0x13      // -8dB
#define    MainVol_n12dB          0x12      // -12dB
#define    MainVol_n16dB          0x11      // -16dB
#define    MainVol_n20dB          0x10      // -20dB
#define    MainVol_n24dB          0x0F      // -24dB
#define    MainVol_n28dB          0x0E      // -28dB
#define    MainVol_n32dB          0x0D      // -32dB
#define    MainVol_n36dB          0x0C      // -36dB
#define    MainVol_n40dB          0x0B      // -40dB
#define    MainVol_n44dB          0x0A      // -44dB
#define    MainVol_n48dB          0x09      // -48dB
#define    MainVol_n52dB          0x08      // -52dB
#define    MainVol_n56dB          0x07      // -56dB
#define    MainVol_n60dB          0x06      // -60dB
#define    MainVol_n64dB          0x05      // -64dB
#define    MainVol_n68dB          0x04      // -68dB
#define    MainVol_n72dB          0x03      // -72dB
#define    MainVol_n76dB          0x02      // -76dB
#define    MainVol_n80dB          0x01      // -80dB

// 第二级音量定义
#define    SubVol_0dB             0x03      // 0dB
#define    SubVol_n1dB            0x02      // -1dB
#define    SubVol_n2dB            0x01      // -2dB
#define    SubVol_n3dB            0x00      // -3dB

#define    _1CH              0x00
#define    _SINGLE           0x01

// 音量调节最大0dB, 最小-80dB, 分成12步
const uint16_t VolumeTable[] = {
    (0x0600 | _1CH | (_SINGLE << 1) | (SubVol_0dB << 7) | (MainVol_0dB << 2)),    // 0dB
    (0x0600 | _1CH | (_SINGLE << 1) | (SubVol_n2dB << 7) | (MainVol_0dB << 2)),   // -2dB
    (0x0600 | _1CH | (_SINGLE << 1) | (SubVol_0dB << 7) | (MainVol_n4dB << 2)),   // -4dB
    (0x0600 | _1CH | (_SINGLE << 1) | (SubVol_n2dB << 7) | (MainVol_n4dB << 2)),  // -6dB
    (0x0600 | _1CH | (_SINGLE << 1) | (SubVol_n1dB << 7) | (MainVol_n8dB << 2)),  // -9dB
    (0x0600 | _1CH | (_SINGLE << 1) | (SubVol_0dB << 7) | (MainVol_n12dB << 2)),  // -12dB
    (0x0600 | _1CH | (_SINGLE << 1) | (SubVol_n2dB << 7) | (MainVol_n16dB << 2)), // -18dB
    (0x0600 | _1CH | (_SINGLE << 1) | (SubVol_0dB << 7) | (MainVol_n24dB << 2)),  // -24dB
    (0x0600 | _1CH | (_SINGLE << 1) | (SubVol_0dB << 7) | (MainVol_n36dB << 2)),  // -36dB
    (0x0600 | _1CH | (_SINGLE << 1) | (SubVol_0dB << 7) | (MainVol_n48dB << 2)),  // -48dB
    (0x0600 | _1CH | (_SINGLE << 1) | (SubVol_0dB << 7) | (MainVol_n60dB << 2)),  // -60dB
    (0x0600 | _1CH | (_SINGLE << 1) | (SubVol_0dB << 7) | (MainVol_n80dB << 2)),  // -80dB
};

void m62429_init(void)
{
    gpio_config(M62429_SDA_PERIPH, M62429_SDA_PIN, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, nullptr);

    m62429_set_vol(1);
}

void send1_byte(uint8_t s_data) // data1对应的位发送子程序
{
    // 发中间值D1--D8
    gpio_bit_write(M62429_SCL_PERIPH, M62429_SCL_PIN, RESET);
    for (uint8_t t = 0; t <= 7; t++)
    {
        gpio_bit_write(M62429_SDA_PERIPH, M62429_SDA_PIN, (s_data & 0x80) >> 7);
        s_data <<= 1;
        __NOP();
        gpio_bit_write(M62429_SCL_PERIPH, M62429_SCL_PIN, SET);
        __NOP();
        gpio_bit_write(M62429_SCL_PERIPH, M62429_SCL_PIN, RESET);
        __NOP();
    }

    // D9--1
    gpio_bit_write(M62429_SDA_PERIPH, M62429_SDA_PIN, 1);
    __NOP();
    gpio_bit_write(M62429_SCL_PERIPH, M62429_SCL_PIN, SET);
    __NOP();
    gpio_bit_write(M62429_SDA_PERIPH, M62429_SDA_PIN, 0);
    __NOP();
    gpio_bit_write(M62429_SCL_PERIPH, M62429_SCL_PIN, RESET);
    __NOP();

    // D10--1
    gpio_bit_write(M62429_SDA_PERIPH, M62429_SDA_PIN, 1);
    __NOP();
    gpio_bit_write(M62429_SCL_PERIPH, M62429_SCL_PIN, SET);
    __NOP();
    gpio_bit_write(M62429_SDA_PERIPH, M62429_SDA_PIN, 1);
    __NOP();
    gpio_bit_write(M62429_SCL_PERIPH, M62429_SCL_PIN, RESET);
    __NOP();
}

void m62429_set_vol(uint8_t level)
{
    uint16_t data = VolumeTable[level];

    // 发送10位数据，共11位，最后1位另外发
    for (uint8_t i = 0; i < 10; i++)
    {
        gpio_bit_write(M62429_SDA_PERIPH, M62429_SDA_PIN, data & 0x01);
        gpio_bit_write(M62429_SCL_PERIPH, M62429_SCL_PIN, SET);
        __NOP();
        gpio_bit_write(M62429_SDA_PERIPH, M62429_SDA_PIN, 0);
        gpio_bit_write(M62429_SCL_PERIPH, M62429_SCL_PIN, RESET);

        data >>= 1;
    }

    // 最后1位D10 = 1
    gpio_bit_write(M62429_SDA_PERIPH, M62429_SDA_PIN, 0x01);
    gpio_bit_write(M62429_SCL_PERIPH, M62429_SCL_PIN, SET);
    __NOP();
    gpio_bit_write(M62429_SCL_PERIPH, M62429_SCL_PIN, RESET);
}