Question

所以我试图用8位数据总线连接芯片。一切都很好，但是......

Arduino Uno使用D0和D1进行串行TX / RX（与PC的USB连接）。当我尝试打开串行连接（在serial.begin阶段）时，端口D0和D1阻塞，芯片停止工作。这是一个问题。

我想我应该将引脚D0和D1重新定位到另一个端口。但该芯片使用8引脚（8位芯片）。所以我需要将第一个引脚（D0）和第二个引脚（D1）重新定位到端口b。也许我可以使用B4和B3？

但我不知道如何一次性使用PORTD [PD2，PD3，PD4，PD5，PD6，PD7]和PORTB [PB4，PB3]，如：

var portX = PORTD[PD2, PD3, PD4, PD5, PD6, PD7] + PORTB[PB4, PB3];
portX = data;

我的代码：

#include <avr/io.h>     // For I/O and other AVR registers
#include <util/delay.h> // For timing


/* Pinmap (Arduino UNO compatible) */
#define YM_IC (5) // PC5 (= pin A5 for Arduino UNO)
#define YM_CS (4) // PC4 (= pin A4 for Arduino UNO)
#define YM_WR (3) // PC3 (= pin A3 for Arduino UNO)
#define YM_RD (2) // PC2 (= pin A2 for Arduino UNO)
#define YM_A0 (1) // PC1 (= pin A1 for Arduino UNO)
#define YM_A1 (0) // PC0 (= pin A0 for Arduino UNO)
#define YM_CTRL_DDR DDRC
#define YM_CTRL_PORT PORTC
#define YM_DATA_DDR DDRD

#define YD0 (0)(= pin D0 for Arduino UNO)
#define YD1 (1)(= pin D1 for Arduino UNO)
#define YD2 (2)(= pin D2 for Arduino UNO)
#define YD3 (3)(= pin D3 for Arduino UNO)
#define YD4 (4)(= pin D4 for Arduino UNO)
#define YD5 (5)(= pin D5 for Arduino UNO)
#define YD6 (6)(= pin D6 for Arduino UNO)
#define YD7 (7)(= pin D7 for Arduino UNO)

#define YM_DATA_PORT PORTD // Whole PORT D for data bus (= pins D0 to D7 for Arduino UNO)
#define YM_MCLOCK (1) // PB1 = OC1A (= pin D9 for Arduino UNO)
#define YM_MCLOCK_DDR DDRB

extern uint8_t chflash[6];
uint8_t dacflash;
#define NOTEONFLASH 4
#define VGMWAIT 15

static void write_ym(uint8_t data) {
  YM_CTRL_PORT &= ~_BV(YM_CS); // CS LOW
  YM_DATA_PORT = data;
  _delay_us(1);
  YM_CTRL_PORT &= ~_BV(YM_WR); // Write data
  _delay_us(5);
  YM_CTRL_PORT |= _BV(YM_WR);
  _delay_us(5);
  YM_CTRL_PORT |= _BV(YM_CS); // CS HIGH
}

/**
 * Write data into a specific register of the YM2612
 *
 * @author Furrtek
 * @param reg Destination register address
 * @param data Data to write
 */
static void setreg(uint8_t reg, uint8_t data) {
  YM_CTRL_PORT &= ~_BV(YM_A0); // A0 low (select register)
  write_ym(reg);
  YM_CTRL_PORT |= _BV(YM_A0);  // A0 high (write register)
  write_ym(data);
}

void call() {
  setreg(0x28, 0xF0); // Key on
  _delay_ms(1000);
  setreg(0x28, 0x00); // Key off
}

uint8_t getfilebyte() {
  return Serial.read();
}

int main() { 
  init();

  //Serial.begin(9600);
  /* Pins setup */
  YM_CTRL_DDR |= _BV(YM_IC) | _BV(YM_CS) | _BV(YM_WR) | _BV(YM_RD) | _BV(YM_A0) | _BV(YM_A1);
  YM_DATA_DDR |= _BV(YD0) | _BV(YD1) | _BV(YD2) | _BV(YD3) | _BV(YD4) | _BV(YD5) | _BV(YD6) | _BV(YD7); 
  YM_MCLOCK_DDR |= _BV(YM_MCLOCK);
  YM_CTRL_PORT |= _BV(YM_IC) | _BV(YM_CS) | _BV(YM_WR) | _BV(YM_RD); /* IC, CS, WR and RD HIGH by default */
  YM_CTRL_PORT &= ~(_BV(YM_A0) | _BV(YM_A1)); /* A0 and A1 LOW by default */

  /* F_CPU / 2 clock generation */
  TCCR1A = _BV(COM1A0);            /* Toggle OCA1 on compare match */
  TCCR1B = _BV(WGM12) | _BV(CS10); /* CTC mode with prescaler /1 */
  TCCR1C = 0;                      /* Flag reset */
  TCNT1 = 0;                       /* Counter reset */
  OCR1A = 0;                       /* Divide base clock by two */

  /* Reset YM2612 */
  YM_CTRL_PORT &= ~_BV(YM_IC);
  _delay_ms(10);
  YM_CTRL_PORT |= _BV(YM_IC);
  _delay_ms(10);

  /* YM2612 Test code */ 
  setreg(0x22, 0x00); // LFO off
  setreg(0x27, 0x00); // Note off (channel 0)
  setreg(0x28, 0x01); // Note off (channel 1)
  setreg(0x28, 0x02); // Note off (channel 2)
  setreg(0x28, 0x04); // Note off (channel 3)
  setreg(0x28, 0x05); // Note off (channel 4)
  setreg(0x28, 0x06); // Note off (channel 5)
  setreg(0x2B, 0x00); // DAC off
  setreg(0x30, 0x71); //
  setreg(0x34, 0x0D); //
  setreg(0x38, 0x33); //
  setreg(0x3C, 0x01); // DT1/MUL
  setreg(0x40, 0x23); //
  setreg(0x44, 0x2D); //
  setreg(0x48, 0x26); //
  setreg(0x4C, 0x00); // Total level
  setreg(0x50, 0x5F); //
  setreg(0x54, 0x99); //
  setreg(0x58, 0x5F); //
  setreg(0x5C, 0x94); // RS/AR 
  setreg(0x60, 0x05); //
  setreg(0x64, 0x05); //
  setreg(0x68, 0x05); //
  setreg(0x6C, 0x07); // AM/D1R
  setreg(0x70, 0x02); //
  setreg(0x74, 0x02); //
  setreg(0x78, 0x02); //
  setreg(0x7C, 0x02); // D2R
  setreg(0x80, 0x11); //
  setreg(0x84, 0x11); //
  setreg(0x88, 0x11); //
  setreg(0x8C, 0xA6); // D1L/RR
  setreg(0x90, 0x00); //
  setreg(0x94, 0x00); //
  setreg(0x98, 0x00); //
  setreg(0x9C, 0x00); // Proprietary
  setreg(0xB0, 0x32); // Feedback/algorithm
  setreg(0xB4, 0xC0); // Both speakers on
  setreg(0x28, 0x00); // Key off
  setreg(0xA4, 0x22); // 
  setreg(0xA0, 0x69); // Set frequency

  call();

  while(1000) {
    if (Serial.available() > 0) {
      _delay_ms(1000);
      call();
      _delay_ms(1000);
      char var = getfilebyte();
      Serial.print("Yeah: ");
      Serial.println(var);
    } else {
      Serial.print("Nooo: ");
      Serial.println(Serial.available());
      call();
    }
  }
  while(1);
}

Answer 1

你需要把它们放在一起。 Bitshift和bitwise或bitwiase和。在参考文献中查找这些内容。你想要的东西会是这样的：

byte portX = (PORTD & 0xFC) | ((PORTB >> 3) & 0x03);

你实际上最终得到的结果可能略有不同，因为我假设你想要这些位的顺序。第一部分掩盖PORTD的高6位，第二部分移出你想要的两位将PORTB写入最低的两位并将其屏蔽掉。 |在中间把两者放在一起。

Answer 2

一个绝对的答案，因为我认为你现在正在改变你的问题。我想你想输出那些引脚。你也需要做到这一点。

类似的东西：

PORTB |= (data & 0x03) << 3;
PORTD |= data & 0xFC;

Answer 3

＆＃34;无法在同一条指令中写入两个不同的寄存器，因此如果您需要在运气不好的情况下完全改变所有八个位，那么＃34;＆＃34;来自电子的回答。也许我可以在多个系列的开始和结束时测试我的运气..

Arduino港口搬迁（PORTD到PORTB）

3 个答案: