有关flexbus的问题

magang2011

我在用flexbus，设置为32位复用。但是只有cs0能用，cs2，cs3都没有信号，不知谁有好的建议？谢谢！
void K60_flexbus_init(void){
/* Enable the FlexBus                                               */
/* Configure the FlexBus Registers for 32-bit port size              */
/*  with multiplex address and data using chip select 3              */
/*  comes out on AD[31:0]                                          */
 
  //Set Base address
  FB_CSAR2 = (uint32)&EX_START_ADDRESS;
  FB_CSCR2  =   FB_CSCR_PS(0)      // 32-bit port
              | FB_CSCR_AA_MASK    // auto-acknowledge
              | FB_CSCR_ASET(0x0)  // assert chip select on first clock edge after address is asserted
              | FB_CSCR_WS(0x1)    // 1 wait state - may need a wait state depending on the bus speed
              ;
  FB_CSMR2  =   FB_CSMR_BAM(0x7)  //Set base address mask for 512K address space
              | FB_CSMR_V_MASK    //Enable cs signal
              ;
             
   //enable BE signals - note, not used in this example
  FB_CSPMCR = 0x00011000;
  //fb clock divider 3
  SIM_CLKDIV1 |= SIM_CLKDIV1_OUTDIV3(0x3);
  
  
  /* Configure the pins needed to FlexBus Function (Alt 5) */
  /* this example uses low drive strength settings         */
  //address
  PORTB_PCR20 = PORT_PCR_MUX(5);           //  fb_ad[31]
  PORTB_PCR21 = PORT_PCR_MUX(5);           //  fb_ad[30]
  PORTB_PCR22 = PORT_PCR_MUX(5);           //  fb_ad[29]
  PORTB_PCR23 = PORT_PCR_MUX(5);           //  fb_ad[28]
  PORTC_PCR12 = PORT_PCR_MUX(5);           //  fb_ad[27]
  PORTC_PCR13 = PORT_PCR_MUX(5);           //  fb_ad[26]
  PORTC_PCR14 = PORT_PCR_MUX(5);           //  fb_ad[25]
  PORTC_PCR15 = PORT_PCR_MUX(5);           //  fb_ad[24] 
  PORTB_PCR6  = PORT_PCR_MUX(5);           //  fb_ad[23]
  PORTB_PCR7  = PORT_PCR_MUX(5);           //  fb_ad[22]
  PORTB_PCR8  = PORT_PCR_MUX(5);           //  fb_ad[21]
  PORTB_PCR9  = PORT_PCR_MUX(5);           //  fb_ad[20]
  PORTB_PCR10 = PORT_PCR_MUX(5);           //  fb_ad[19] 
  PORTB_PCR11 = PORT_PCR_MUX(5);           //  fb_ad[18]
  PORTB_PCR16 = PORT_PCR_MUX(5);           //  fb_ad[17]
  PORTB_PCR17 = PORT_PCR_MUX(5);           //  fb_ad[16]
  PORTB_PCR18 = PORT_PCR_MUX(5);           //  fb_ad[15]
  PORTC_PCR0  = PORT_PCR_MUX(5);           //  fb_ad[14]
  PORTC_PCR1  = PORT_PCR_MUX(5);           //  fb_ad[13]
  PORTC_PCR2  = PORT_PCR_MUX(5);           //  fb_ad[12]
  PORTC_PCR4  = PORT_PCR_MUX(5);           //  fb_ad[11]
  PORTC_PCR5  = PORT_PCR_MUX(5);           //  fb_ad[10]
  PORTC_PCR6  = PORT_PCR_MUX(5);           //  fb_ad[9]
  PORTC_PCR7  = PORT_PCR_MUX(5);           //  fb_ad[8]
  PORTC_PCR8  = PORT_PCR_MUX(5);           //  fb_ad[7]
  PORTC_PCR9  = PORT_PCR_MUX(5);           //  fb_ad[6]
  PORTC_PCR10 = PORT_PCR_MUX(5);           //  fb_ad[5]
  PORTD_PCR2  = PORT_PCR_MUX(5);           //  fb_ad[4]
  PORTD_PCR3  = PORT_PCR_MUX(5);           //  fb_ad[3]
  PORTD_PCR4  = PORT_PCR_MUX(5);           //  fb_ad[2]
  PORTD_PCR5  = PORT_PCR_MUX(5);           //  fb_ad[1]
  PORTD_PCR6  = PORT_PCR_MUX(5);           //  fb_ad[0]
  //control signals
  PORTB_PCR19 = PORT_PCR_MUX(5);          // fb_oe_b
  PORTC_PCR11 = PORT_PCR_MUX(5);          // fb_rw_b
  PORTC_PCR18 = PORT_PCR_MUX(5);          // fb_cs2_b,P125
  PORTC_PCR19 = PORT_PCR_MUX(5);          // fb_cs3_b,P126
  PORTD_PCR0  = PORT_PCR_MUX(5);          // fb_ale
  PORTC_PCR3  = PORT_PCR_MUX(5);          // fb_clk
  PORTD_PCR1  = PORT_PCR_MUX(5);          // fb_cs0_b,P128
 

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安

很抱歉，这个问题我也不能解决，知道的同学帮忙解决一下。谢谢了。

magang2011

问题解决，参照NOTE: At reset, no chip-select other than FB_CS0 can be used until the CSMR0[V] is set. Afterward,
FB_CS[5:0] functions as programmed.

FSL_FAE_MIKE

问题解决，参照NOTE: At reset, no chip-select other than FB_CS0 can be used until the CSMR0[V] is set. Afterward,
FB_CS[5:0] functions as programmed.
 
你是怎么添加的程序；这句没有看太懂啊

hbysdxlm

这是我的初始化函数，16根总线复用 为什么总是没法写和读呢 
void TWRK60_flexbus_init(void)
{
/* Enable the FlexBus                                               */
/* Configure the FlexBus Registers for 8-bit port size              */
/*  with separate address and data using chip select 0              */
/* These configurations are specific to communicating with          */
/*  the MRAM used in this example                                   */
/* For K60 tower module - do not set byte lane shift so that data   */
/*  comes out on AD[31:24]                                          */
 
 //Set Base address
//FB_CSAR0 = (uint32)&MRAM_START_ADDRESS;
 FB_CSAR0 =MRAM_START_ADDRESS;
FB_CSCR0 = FB_CSCR_PS(2) // 16-bit port
| FB_CSCR_AA_MASK // auto-acknowledge
| FB_CSCR_ASET(0x1) // assert chip select on 2 clock edge after address is
| FB_CSCR_WS(0x1) // no wait state - may need a wait state depending on the bus speed
| FB_CSCR_BEM_MASK
| FB_CSCR_RDAH(0);
 
  FB_CSMR0  =   FB_CSMR_BAM(0x7)  //Set base address mask for 512K address space
              | FB_CSMR_V_MASK ;   //Enable cs signal             
  //enable BE signals - note, not used in this example
  FB_CSPMCR = FB_CSPMCR_GROUP2(2) | FB_CSPMCR_GROUP3(2);//该寄存器控制信号线的多路复用
 //fb clock divider 3
  SIM_CLKDIV1 |= SIM_CLKDIV1_OUTDIV3(0x3);
  
  
  /* Configure the pins needed to FlexBus Function (Alt 5) */
  /* this example uses low drive strength settings         */
  //data/address
  PORTB_PCR20 = PORT_PCR_MUX(5);           //  fb_ad[31]
  PORTB_PCR21 = PORT_PCR_MUX(5);           //  fb_ad[30
  PORTB_PCR22 = PORT_PCR_MUX(5);           //  fb_ad[29
  PORTB_PCR23 = PORT_PCR_MUX(5);           //  fb_ad[28]
  PORTC_PCR12 = PORT_PCR_MUX(5);           //  fb_ad[27
  PORTC_PCR13 = PORT_PCR_MUX(5);           //  fb_ad[26]
  PORTC_PCR14 = PORT_PCR_MUX(5);           //  fb_ad[25]
  PORTC_PCR15 = PORT_PCR_MUX(5);           //  fb_ad[24]
  PORTB_PCR6 = PORT_PCR_MUX(5);           //  fb_ad[23]
  PORTB_PCR7 = PORT_PCR_MUX(5);           //  fb_ad[22]
  PORTB_PCR8 = PORT_PCR_MUX(5);           //  fb_ad[21]
  PORTB_PCR9 = PORT_PCR_MUX(5);           //  fb_ad[20]
  PORTB_PCR10  = PORT_PCR_MUX(5);           //  fb_ad[19]
  PORTB_PCR11 = PORT_PCR_MUX(5);           //  fb_ad[18]
  PORTB_PCR16 = PORT_PCR_MUX(5);           //  fb_ad[17]
  PORTB_PCR17 = PORT_PCR_MUX(5);           //  fb_ad[16]
  //control signals
  PORTB_PCR19 = PORT_PCR_MUX(5);           // fb_oe_b读
  PORTC_PCR11 = PORT_PCR_MUX(5);           // fb_rw_b 写
  PORTD_PCR1  = PORT_PCR_MUX(5);           // fb_cs0_b
 // PORTD_PCR0  = PORT_PCR_MUX(5);         // fb_ale
  PORTE_PCR25  = PORT_PCR_MUX(5);          // 中断控制引脚INT
  PORTD_PCR4 = PORT_PCR_MUX(5);            //FB_AD[2]控制CMD
 
  PORTA_PCR14 = PORT_PCR_MUX(1);            //DM9000复位引脚，用普通io控制
  GPIOA_PDDR=GPIO_PDDR_PDD(GPIO_PIN(14));    //定义PORTA的pin14输出
 
}

hbysdxlm

回复第 4 楼 于2012-02-28 21:04:36发表:
问题解决，参照NOTE: At reset, no chip-select other than FB_CS0 can be used until the CSMR0[V] is set. Afterward,
FB_CS[5:0] functions as programmed.
 
你是怎么添加的程序；这句没有看太懂啊
 
您的复用问题解决了吗  帮忙看看我的初始化函数吧  总是读写不成功呢  谢谢了

bluehacker-1165

Flexbus时序很古怪，不是普通8086时序。dm9000连接比较麻烦

hustck

  地址线要与数据线分开，数据线有16根，地址线看板子
  //address 
PORTB_PCR18 = PORT_PCR_MUX(5);           //  fb_ad[15]
  PORTC_PCR0  = PORT_PCR_MUX(5);           //  fb_ad[14]
  PORTC_PCR1  = PORT_PCR_MUX(5);           //  fb_ad[13]
  PORTC_PCR2  = PORT_PCR_MUX(5);           //  fb_ad[12]
  PORTC_PCR4  = PORT_PCR_MUX(5);           //  fb_ad[11]
  PORTC_PCR5  = PORT_PCR_MUX(5);           //  fb_ad[10]
  PORTC_PCR6  = PORT_PCR_MUX(5);           //  fb_ad[9]
  PORTC_PCR7  = PORT_PCR_MUX(5);           //  fb_ad[8]
  PORTC_PCR8  = PORT_PCR_MUX(5);           //  fb_ad[7]
  PORTC_PCR9  = PORT_PCR_MUX(5);           //  fb_ad[6]
  PORTC_PCR10 = PORT_PCR_MUX(5);           //  fb_ad[5]
  PORTD_PCR2  = PORT_PCR_MUX(5);           //  fb_ad[4]
  PORTD_PCR3  = PORT_PCR_MUX(5);           //  fb_ad[3]
  PORTD_PCR4  = PORT_PCR_MUX(5);           //  fb_ad[2]
  PORTD_PCR5  = PORT_PCR_MUX(5);           //  fb_ad[1]
  PORTD_PCR6  = PORT_PCR_MUX(5);           //  fb_ad[0]
 
  //data                                                         8bit|16bit
  PORTB_PCR20 = PORT_PCR_MUX(5);           //  fb_ad[31] used as d[7]|d[15]
  PORTB_PCR21 = PORT_PCR_MUX(5);           //  fb_ad[30] used as d[6]|d[14]
  PORTB_PCR22 = PORT_PCR_MUX(5);           //  fb_ad[29] used as d[5]|d[13]
  PORTB_PCR23 = PORT_PCR_MUX(5);           //  fb_ad[28] used as d[4]|d[12]
  PORTC_PCR12 = PORT_PCR_MUX(5);           //  fb_ad[27] used as d[3]|d[11]
  PORTC_PCR13 = PORT_PCR_MUX(5);           //  fb_ad[26] used as d[2]|d[10]
  PORTC_PCR14 = PORT_PCR_MUX(5);           //  fb_ad[25] used as d[1]|d[9]
  PORTC_PCR15 = PORT_PCR_MUX(5);           //  fb_ad[24] used as d[0]|d[8]
 
  PORTB_PCR6  = PORT_PCR_MUX(5);           //  fb_ad[23] used as     |d[7]
  PORTB_PCR7  = PORT_PCR_MUX(5);           //  fb_ad[22] used as     |d[6]
  PORTB_PCR8  = PORT_PCR_MUX(5);           //  fb_ad[21] used as     |d[5]
  PORTB_PCR9  = PORT_PCR_MUX(5);           //  fb_ad[20] used as     |d[4]
  PORTB_PCR10 = PORT_PCR_MUX(5);           //  fb_ad[19] used as     |d[3]
  PORTB_PCR11 = PORT_PCR_MUX(5);           //  fb_ad[18] used as     |d[2]
  PORTB_PCR16 = PORT_PCR_MUX(5);           //  fb_ad[17] used as     |d[1]
  PORTB_PCR17 = PORT_PCR_MUX(5);           //  fb_ad[23] used as     |d[0]
 

hustck

//control signals
  PORTB_PCR19 = PORT_PCR_MUX(5);          // fb_oe_b
  PORTC_PCR11 = PORT_PCR_MUX(5);          // fb_rw_b  
  PORTD_PCR1  = PORT_PCR_MUX(5);          // fb_cs0_b
  PORTC_PCR18 = PORT_PCR_MUX(5);          //fb_cs2_b
  PORTC_PCR19 = PORT_PCR_MUX(5);          // fb_cs3_b
  PORTD_PCR0  = PORT_PCR_MUX(5);          // fb_ale
  PORTC_PCR17 = PORT_PCR_MUX(5);          //fb_be31_24
  PORTC_PCR16 = PORT_PCR_MUX(5);          //fb_be23_16

hustck

FB_CSPMCR 没有复用，FB_CSPMCR = 0x02211000;cs2，cs3均有效
再不明白就看datasheet K60X256VLL10英文原版手册.pdf