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你好  我的mmc通道1正常 通道二和通道三为什么都不正常 就是没有信号 设置都是按照说明接的 地址检查了也是正确的

你好，我用的是SPI连续读，和延时10ms读，也是没有波形输出命令写的是对的，我们这的人都是能写能读，就是没有信号输出。我的程序
#define CH1MODE 0
#define CH1FREQ 1
#define CH1STEP 2
#define CH1DUTY 3
#define CH2MODE 4
#define CH2FREQ 5
#define CH2STEP 6
#define CH2DUTY 7
#define CH3MODE 8
#define CH3FREQ 9
#define CH3STEP 0X0A
#define CH3DUTY 0X0B
#define SYNMODE 0X0C
#define ASSP_R 0XA0
#define ASSP_W 0X50
#define reset0 PORTE7_0
#define reset1 PORTE7_1


#include<iom128v.h>
#include<macros.h>
#include<iobit.h>
#include"usart.c"
#include"define.h"

#define uchar unsigned char
#define uint unsigned int

//uchar ch1mode=0,ch2mode=0;

void delay(uint count)
{
for(;count>0;count--);

}

void port_init(void)
{
 PORTA = 0xff;
 DDRA  = 0xff;
 PORTB = 0x3f;
 DDRB  = 0x37;
 PORTC = 0x00;
 DDRC  = 0x00;
 PORTD = 0x00;
 DDRD  = 0x00;
 PORTE = 0x83;
 DDRE  = 0x83;
 PORTF = 0x00;
 DDRF  = 0x00;
 PORTG = 0x00;
 DDRG  = 0x00;
}

void spi_m_init()
{
 SPCR = 0x53; //setup SPI
 SPSR = 0x00; //setup SPI
}

uchar spi_rw(uchar data)
{
SPDR=data;
while(!(SPSR&(1<<SPIF)));
return(SPDR);
}

uchar assp_read(uchar data)
{
spi_rw(data);
return(spi_rw(0));
}

void assp_write(uchar data1,uchar data2)
{
spi_rw(data1);
spi_rw(data2);
}

void main()
{
port_init();
usart0_init();
usart_str("RX:",3);
spi_m_init();

assp_write(ASSP_W+CH1DUTY,0x7d);
//usart_c(assp_read(ASSP_R|CH1DUTY));
assp_write(ASSP_W+CH1MODE,0xc0);
//usart_c(assp_read(ASSP_R|CH1MODE));
//assp_write(ASSP_W+CH2DUTY,0x7d);
//usart_c(assp_read(ASSP_R|CH2DUTY));
//assp_write(ASSP_W+CH2MODE,0xc0);
//usart_c(assp_read(ASSP_R|CH2MODE));
//assp_write(ASSP_W+CH3DUTY,0x7d);
//usart_c(assp_read(ASSP_R|CH3DUTY));
//assp_write(ASSP_W+CH3MODE,0xc0);
usart_c(assp_read(ASSP_R|CH1MODE));
while(1);

}


程序的SPI应用没有错的

都是这个问题呀，有解决的办法没？