K1Guitar/midi/midi_send.c

#include "includes.h"

// Note Off 0x8n
void SendNoteOffMidiEvent(uint8_t Key, uint8_t OffVal)
{
  uint8_t midibuff[3] = {0x80 , Key , OffVal};
  USART2_SendData(midibuff,sizeof(midibuff));
}

// Note On 0x9n
void SendNoteOnMidiEvent(uint8_t Key, uint8_t OnVal)
{
  uint8_t midibuff[3] = {0x90 , Key , OnVal};
  USART2_SendData(midibuff,sizeof(midibuff));
}


void SendProgramChangeMidiEvent(uint8_t channel,uint8_t CC)
{
  uint8_t midibuff[2] = {0xC0|channel , CC };
  SendMidiDataToDreamDSP(midibuff,2);
}

void SendVolumeChangeMidiEvent(uint8_t channel,uint8_t CC)
{
  uint8_t midibuff[3] = {0xB0|channel ,0x07, CC };
  SendMidiDataToDreamDSP(midibuff,3);
}
  
/* Bank Select：CC0(MSB)=bank，CC32(LSB)=0。Dream 双音色库：0=伴奏，1=主弦 */
void SendBankChangeMidiEvent(uint8_t channel, uint8_t bank)
{
  uint8_t midibuff[3] = {0xB0|(channel & 0x0F) ,0x00, bank };
  SendMidiDataToDreamDSP(midibuff,3);
  midibuff[1] = 0x20;  /* CC32 Bank LSB */
  midibuff[2] = 0;
  SendMidiDataToDreamDSP(midibuff,3);
}

/* 先选 Bank 再 Program Change，避免漏发 Bank Select 落到错误音色库 */
void SendProgramWithBankMidiEvent(uint8_t channel, uint8_t bank, uint8_t program)
{
  SendBankChangeMidiEvent(channel, bank);
  SendProgramChangeMidiEvent(channel, program);
}

void SendMidiDataToDreamDSP(uint8_t* buff, uint16_t cnt)
{  
        USART2_SendData(buff,cnt);
}

/* Roland/Dream GS：checksum = 0x80 - (addr+data 低 7 位) */
static void Dream_Dt1(uint8_t ah, uint8_t am, uint8_t al, const uint8_t *data, uint8_t n)
{
    uint8_t msg[16];
    uint8_t i;
    uint8_t sum;

    msg[0] = 0xF0;
    msg[1] = 0x41;
    msg[2] = 0x00;
    msg[3] = 0x42;
    msg[4] = 0x12;
    msg[5] = ah;
    msg[6] = am;
    msg[7] = al;
    sum = (uint8_t)(ah + am + al);
    for (i = 0; i < n; i++)
    {
        msg[8 + i] = data[i];
        sum = (uint8_t)(sum + data[i]);
    }
    msg[8 + n] = (uint8_t)((0x80u - (sum & 0x7Fu)) & 0x7Fu);
    msg[9 + n] = 0xF7;
    SendMidiDataToDreamDSP(msg, (uint16_t)(10u + n));
}

static void Dream_Dt1Byte(uint8_t ah, uint8_t am, uint8_t al, uint8_t data)
{
    Dream_Dt1(ah, am, al, &data, 1);
}

/* 音师编辑器 B:Reverb / E:PEQ Normal。
   混响是 GS 系统区 40 01 30：Hall2=4，Size=Character，PreLP，Level，Time，Delay Feedback。
   PEQ 为同一套 4 段参量：增益按 0.1 dB/档、0=0 dB；频率按 Hz 的 14 位原值；Q 按 0.1 显示（2.00→20）。 */
void Dream_ApplyEditorParams(void)
{
    uint8_t hz[2];

    Dream_Dt1Byte(0x40, 0x01, 0x30, 4);   /* Type Hall2 */
    Dream_Dt1Byte(0x40, 0x01, 0x31, 4);   /* Size */
    Dream_Dt1Byte(0x40, 0x01, 0x32, 2);   /* PreLP */
    Dream_Dt1Byte(0x40, 0x01, 0x33, 85);  /* Level */
    Dream_Dt1Byte(0x40, 0x01, 0x34, 64);  /* Time */
    Dream_Dt1Byte(0x40, 0x01, 0x35, 0);   /* DelFdbck */

    /* 40 04 00.. 与编辑器从左到右、从上到下一致 */
    Dream_Dt1Byte(0x40, 0x04, 0x00, 81);  /* GainLow  8.1 dB */
    Dream_Dt1Byte(0x40, 0x04, 0x01, 12);  /* GainLoMid 1.2 dB */
    Dream_Dt1Byte(0x40, 0x04, 0x02, 7);   /* GainHiMid 0.7 dB */
    Dream_Dt1Byte(0x40, 0x04, 0x03, 28);  /* GainHigh 2.8 dB */

    hz[0] = (uint8_t)((412 >> 7) & 0x7F);
    hz[1] = (uint8_t)(412 & 0x7F);
    Dream_Dt1(0x40, 0x04, 0x04, hz, 2);   /* FreqLow 412 Hz */
    hz[0] = (uint8_t)((2294 >> 7) & 0x7F);
    hz[1] = (uint8_t)(2294 & 0x7F);
    Dream_Dt1(0x40, 0x04, 0x06, hz, 2);   /* FreqLoMid 2294 Hz */
    hz[0] = (uint8_t)((6048 >> 7) & 0x7F);
    hz[1] = (uint8_t)(6048 & 0x7F);
    Dream_Dt1(0x40, 0x04, 0x08, hz, 2);   /* FreqHiMid 6048 Hz */
    hz[0] = (uint8_t)((3126 >> 7) & 0x7F);
    hz[1] = (uint8_t)(3126 & 0x7F);
    Dream_Dt1(0x40, 0x04, 0x0A, hz, 2);   /* FreqHigh 3126 Hz */

    Dream_Dt1Byte(0x40, 0x04, 0x0C, 20);  /* Q-LoMid 2.00 */
    Dream_Dt1Byte(0x40, 0x04, 0x0D, 20);  /* Q-HiMid 2.00 */
}

#define AT32_UID_BASE  0x1FFFF7E8UL

void BleBuildDeviceName(char *out)
{
  static const char hex[] = "0123456789ABCDEF";
  const uint32_t *uid = (const uint32_t *)AT32_UID_BASE;
  uint32_t tail = uid[2] & 0x00FFFFFFu;
  unsigned i;

  out[0] = 'P';
  out[1] = 'H';
  out[2] = 'O';
  out[3] = 'N';
  out[4] = '_';
  for (i = 0; i < 6; i++)
    out[5 + i] = hex[(tail >> (4 * (5 - i))) & 0xFu];
  out[BLE_DEVICE_NAME_LEN] = '\0';
}