Haawking DSC28027实例程序开发教程—SPI_FLASH

ti

本帖最后由阳阳阳阳阳阳阳阳于 2021-8-23 17:51 编辑

/******************************************************************

编译器：Haawking IDE V0.5.0

D S P：dsc28027勇士板

电脑配 置：Windows10 专业版; 64 位操作系统

仿真器：HX100V2

使用库：无

作 用：DSC28027的SPI端口连接W25Q16芯片，实现对W25Q16的读写操作

版 本：V0.0.1

******************************************************************/

1.HaawkingIDE新建工程

2.SPI引脚配置

/******************************************************************

函数名：void SPI_IOinit(void)

参数：无

返回值：无

作用：GPIO16、GPIO17、GPIO18为SPI功能，GPIO19为片选引脚

******************************************************************/

void SPI_IOinit(void)
{
EALLOW;
//GpioCtrlRegs.GPAMUX2.bit.GPIO19 = 0; //作为普通IO口使用
//GpioCtrlRegs.GPADIR.bit.GPIO19 = 1; //管脚配置成输出
GpioCtrlRegs.GPAPUD.bit.GPIO16 = 0; //Enable pull-up on GPIO16 (SPIAMOSI)
GpioCtrlRegs.GPAPUD.bit.GPIO17 = 0; //Enable pull_up on GPIO17 (SPIAMISO)
GpioCtrlRegs.GPAPUD.bit.GPIO18 = 0; // Enable pull-up on GPIO18 (SPICLKA)
GpioCtrlRegs.GPAPUD.bit.GPIO19 = 0; // Enable pull-up on GPIO19 (SPISTEA)
GpioCtrlRegs.GPAQSEL2.bit.GPIO16 = 3; // Asynch input GPIO16 (SPISIMOA)
GpioCtrlRegs.GPAQSEL2.bit.GPIO17 = 3; // Asynch input GPIO17 (SPISOMIA)
GpioCtrlRegs.GPAQSEL2.bit.GPIO18 = 3; // Asynch input GPIO18 (SPICLKA)
//GpioCtrlRegs.GPAQSEL2.bit.GPIO19 = 3; // Asynch input GPIO19 (SPISTEA)
GpioCtrlRegs.GPAMUX2.bit.GPIO16 = 1; // Configure GPIO16 as SPISIMOA
GpioCtrlRegs.GPAMUX2.bit.GPIO17 = 1; // Configure GPIO17 as SPISOMIA
GpioCtrlRegs.GPAMUX2.bit.GPIO18 = 1; // Configure GPIO18 as SPICLKA
//GpioCtrlRegs.GPAMUX2.bit.GPIO19 = 1; // Configure GPIO19 as SPISTEA
GpioCtrlRegs.GPAMUX2.bit.GPIO19 = 0; //作为普通IO口使用
GpioCtrlRegs.GPADIR.bit.GPIO19 = 1; //管脚配置成输出
GpioDataRegs.GPACLEAR.bit.GPIO19 = 1;
EDIS;
}

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SPI的FIFO寄存器初始化：

/******************************************************************

函数名：void spi_fifo_init(void)

参数：无

返回值：无

作用：初始化SPI的FIFO寄存器，

******************************************************************/

void spi_fifo_init(void)
{
SpiaRegs.SPIFFTX.bit.SPIRST = 1; //写0复位SPI发送和接收通道，SPI FIFO寄存器配置位将被保留,SPI发送寄存器
//写1，SPI FIFO能重新开始发送或接收，这不影响SPI的寄存器位
SpiaRegs.SPIFFTX.bit.SPIFFENA = 1; //SPI FIFO增强使能
SpiaRegs.SPIFFTX.bit.TXFFST = 1; //Re-enable Transmit FIFO operation,发送FIFO有一个字节
SpiaRegs.SPIFFTX.bit.TXFFINTCLR = 1; //Write 1 to clear TXFFINT flag in bit 7.
SpiaRegs.SPIFFTX.bit.TXFFIENA = 0; //不用中断
SpiaRegs.SPIFFRX.bit.RXFFOVFCLR = 1; //清除RXFFOVF位
SpiaRegs.SPIFFRX.bit.RXFFINTCLR =1; //写1清除RXFFINT标志位
SpiaRegs.SPIFFRX.bit.RXFFST = 1; //接收FIFO有1个字
SpiaRegs.SPIFFRX.bit.RXFFIENA = 0; //不用FIFO接收中断
SpiaRegs.SPIFFRX.bit.RXFFIL = 4;
SpiaRegs.SPIFFCT.all = 0x0; //无延迟
}

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SPI控制寄存器初始化：

/******************************************************************

函数名：void spi_init(void)

参数：无

返回值：无

作用：初始化SPI的控制寄存器，

******************************************************************/

void spi_init(void)
{
GpioDataRegs.GPASET.bit.GPIO19 = 1;
SpiaRegs.SPICCR.bit.SPISWRESET = 0; //初始化SPI操作标志位到复位条件
SpiaRegs.SPICCR.bit.SPICHAR = 7; //8位数据传输
SpiaRegs.SPICCR.bit.CLKPOLARITY = 0; //when no SPI data is sent,SPICLK is at low
SpiaRegs.SPICTL.bit.CLK_PHASE = 1; //当CPHA，数据线在SCK的偶数边沿采样
SpiaRegs.SPICTL.bit.MASTER_SLAVE =1;
SpiaRegs.SPIBRR =5; //3; //For SPIBRR = 3 to 127; SPI Baud Rate = LSPCLK/(SPIBRR+1)
SpiaRegs.SPICCR.bit.SPISWRESET = 1; //SW Reset off
SpiaRegs.SPIPRI.bit.FREE = 1; //Set so breakpoints don't disturb xmission
SpiaRegs.SPIPRI.bit.CS_PRIORITY = 0;
}

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读取状态寄存器1和状态寄存器2的值：

/************************************************************************

函数名：uint16 Read_Status_2Reg(void)

参数：无

返回值：状态寄存器1和状态寄存器2中的值

作用：读状态寄存器1和状态寄存器2的值

//P23

//指令 0x03

//地址 A23--A0

/************************************************************************/

uint16 Read_Status_2Reg(void)
{
uint16 wbyte1,wbyte2;
GpioDataRegs.GPACLEAR.bit.GPIO19 = 1;
Send_Byte(READ_STATUS_REG_IST); //读状态寄存器1指令，返回Status Register1
wbyte1 = Get_Byte();
GpioDataRegs.GPASET.bit.GPIO19 = 1;
GpioDataRegs.GPACLEAR.bit.GPIO19 = 1;
Send_Byte(0x35); //READ_STATUS_REG_IST 读状态寄存器2指令，返回Status Register2
wbyte2 = Get_Byte();
GpioDataRegs.GPASET.bit.GPIO19 = 1;
wbyte2<<=6;
wbyte2 &= 0xff00;
wbyte2 += wbyte1&0xff;
GpioDataRegs.GPASET.bit.GPIO19 = 1;
return wbyte2;
}

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3.main函数

int main(void)
{
// int temp, in;
// volatile unsigned int i;
InitSysCtrl();
// Step 2. Initalize GPIO:
// This example function is found in the DSP2803x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
// InitGpio(); // Skipped for this example
// Step 3. Clear all interrupts and initialize PIE vector table:
// Disable CPU interrupts
DINT;
// Initialize PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.
// This function is found in the DSP2803x_PieCtrl.c file.
InitPieCtrl();
// Disable CPU interrupts and clear all CPU interrupt flags:
IER_DISABLE(0xffff);
IFR_DISABLE(0xffff);
// Initialize the PIE vector table with pointers to the shell Interrupt
// Service Routines (ISR).
// This will populate the entire table, even if the interrupt
// is not used in this example. This is useful for debug purposes.
// The shell ISR routines are found in DSP2803x_DefaultIsr.c.
// This function is found in DSP2803x_PieVect.c.
InitPieVectTable();
EALLOW;
SysCtrlRegs.LOSPCP.all = 0x0002; //低速外设时钟倍频
SysCtrlRegs.XCLK.all = 0x0002; //XCLKOUT Divide Ratio:These two bits select the XCLKOUT ;XCLKOUT = SYSCLKOUT
SysCtrlRegs.PCLKCR0.bit.SPIAENCLK = 1; //使能SPIA的时钟
SysCtrlRegs.PCLKCR3.all = 0x2000; // GPIO Input Clock Enable
SysCtrlRegs.PLLCR.all = 0x0002;
SysCtrlRegs.PLLSTS.all = 0x0180;
EDIS;
// InitSysCtrl();
SPI_IOinit(); //SPI IO端口配置
spi_fifo_init();
spi_init();
SPIFlash.Jedec_ID = Jedec_ID_Read();
SPIFlash.SReg = Read_Status_2Reg();
WREN();
WrSReg(0x0000);
SPIFlash.SReg = Read_Status_2Reg();
Wait_Busy();
SPIFlash.SReg = Read_Status_2Reg();
//ReadData(0,upper_128,128);
WREN();
Chip_Erase();
Wait_Busy();
ReadData(0,upper_128,128);
WREN();
PageProgram(0,upper_100,128);
Wait_Busy();
ReadData(0,upper_128,128);
while(1){
}
return 0;
}

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4.点击编译、编译完成后点击下载

5.运行结果：W25Q16的片选信号是GPIO19，Flash写入操作，只能从逻辑1写为逻辑1或逻辑0；两个数组的前8个数据相等： upper_128[]=upper_100[]

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Haawking DSC28027实例程序开发教程—SPI_FLASH

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