415 lines
7.9 KiB
C
415 lines
7.9 KiB
C
#include "ls1x_spi.h"
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#include "ls1x.h"
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#include "Config.h"
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/*** SPI READ OPTIONS ***/
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#define NORMAL 0x0
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#define FAST 0x1
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#define DUAL_IO 0x2
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/**
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* @Description: SPI 分频系数配置 分别配置到控制寄存器、外部寄存器、参数控制寄存器
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* @Input: 分频系数
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* @Output: 无
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* @return {*}无
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* @param {uint8_t} spr 分频系数
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*/
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void Spi_FreqDiv(uint8_t spr)
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{
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SPI->SPCR &=0xFC;
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SPI->SPER &=0xFC;
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SPI->SPCR |=(spr & 0x03);
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SPI->SPER |=((spr>>2) & 0x03);
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SPI->PARAM &= 0x02;
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SPI->PARAM |=((spr<<4) & 0xF0);
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printf("\r\n0 SPI->PARAM:%x H \r\n",SPI->PARAM);
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}
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/**
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* @Description: spi init
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* @Input: spi 分频系数
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* SPI_DIV_2 SPI_DIV_4 SPI_DIV_16 SPI_DIV_32 SPI_DIV_8 SPI_DIV_64 SPI_DIV_128
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* SPI_DIV_256 SPI_DIV_512 SPI_DIV_1024 SPI_DIV_2048 SPI_DIV_4096
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* @Output: 无
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* @return {*}
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* @param {uint8_t} spr 分频系数 固定为以上的宏定义
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*/
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void Spi_Init(uint8_t spr)
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{
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SPI->SPCR = 0x50; // {int_en, spi, rsvd, mstr, cpol, cpha, spr[1:0]}
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SPI->SPER = 0;
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while(!SPI_TXEMPTY) ; // wait till tx empty
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while(!SPI_RXEMPTY) SPI->DATA; // read till rx empty
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}
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/**
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* @Description: spi 读、写 1~4字节
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* @Input: 数据缓冲，读、写数量
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* @Output: 无
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* @return {*}
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* @param {uint8_t*} buf 数据缓冲
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* @param {int} n 读写数据字节数
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*/
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void Spi_Write_Read_1to4(uint8_t* buf, int n)
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{
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uint32_t i;
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for (i=0; i<n; i++) SPI->DATA = buf[i];
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while(!SPI_TXEMPTY) ;
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for (i=0; i<n-1; i++) buf[i] = SPI->DATA;
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while(SPI_RXEMPTY) ;
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buf[n-1] = SPI->DATA;
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}
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/**
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* @Description: spi 读 写 N字节
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* @Input: 数据缓冲，读写字节数
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* @Output: 无
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* @return {*}
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* @param {uint8_t*} buf 数据缓冲
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* @param {int} n 读写字节数
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*/
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void Spi_Write_Read_N(uint8_t* buf, int n)
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{
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uint32_t i, j;
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for (i=0; i<4; i++) SPI->DATA = buf[i];
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for (j=0; i<n; i++, j++)
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{
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while(SPI_RXEMPTY) ;
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buf[j] = SPI->DATA;
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SPI->DATA = buf[i];
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}
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for (; j<n; j++)
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{
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while(SPI_RXEMPTY) ;
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buf[j] = SPI->DATA;
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}
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}
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/**
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* @Description: SPI 片选信号0 使能并拉低
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* @Input: 无
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* @Output: 无
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* @return {*}
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*/
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void Spi_Cs_Down(void)
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{
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// SPI->SOFTCS = 0xef;
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SPI_ENABLE_CS(0);
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SPI_LOW_CS(0);
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}
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/**
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* @Description: SPI 片选信号0 使能并拉高
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* @Input: 无
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* @Output: 无
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* @return {*}
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*/
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void Spi_Cs_Up(void)
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{
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// SPI->SOFTCS = 0xff;
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SPI_ENABLE_CS(0);
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SPI_HIGH_CS(0);
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}
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/**
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* @Description: SPI 发送数据
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* @Input: 数据缓冲；数据数量
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* @Output: 无
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* @return {*}
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* @param {uint8_t*} buf 数据缓冲
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* @param {int} n 数据量
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*/
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void Spi_Send(uint8_t* buf, int n)
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{
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Spi_Cs_Down();
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Spi_Write_Read_1to4(buf, n);
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Spi_Cs_Up();
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}
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/**
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* @Description:
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* @Input:
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* @Output:
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* @return {*}
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*/
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uint8_t Spiflash_Rdsr(void)
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{
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uint8_t buf[4] = {0x05};
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Spi_Cs_Down();
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Spi_Write_Read_1to4(buf, 2);
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Spi_Cs_Up();
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return buf[1];
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}
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/**
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* @Description: 等待置0
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* @Input: 无
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* @Output:无
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* @return {*}
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*/
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void Spiflash_Wait_Wip_Zero(void)
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{
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while (Spiflash_Rdsr() & 0x01) {}
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}
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/**
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* @Description: spi flash 写
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* @Input:
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* @Output:
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* @return {*}
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*/
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void Spiflash_Wren(void)
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{
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uint8_t buf[4] = {0x06};
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Spiflash_Wait_Wip_Zero();
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Spi_Cs_Down();
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Spi_Write_Read_1to4(buf, 1);
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Spi_Cs_Up();
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}
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/**
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* @Description: spi flash 写寄存器
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* @Input: 状态
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* @Output: 无
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* @return {*}
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* @param {uint8_t} st 状态
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*/
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void Spiflash_Wrsr(uint8_t st)
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{
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uint8_t buf[4] = {0x01};
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Spiflash_Wren();
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buf[1] = st;
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Spi_Cs_Down();
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Spi_Write_Read_1to4(buf, 2);
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Spi_Cs_Up();
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}
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/**
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* @Description: spi flash 读寄存器2
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* @Input: 无
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* @Output: 返回寄存器读取数据
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* @return {*}
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*/
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uint8_t Spiflash_Rdsr2(void)
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{
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uint8_t buf[4] = {0x35};
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Spi_Cs_Down();
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Spi_Write_Read_1to4(buf, 2);
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Spi_Cs_Up();
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return buf[1];
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}
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/**
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* @Description: spi flash 读寄存器3
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* @Input: 无
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* @Output: 返回读取的值
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* @return {*}
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*/
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uint8_t Spiflash_Rdsr3(void)
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{
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uint8_t buf[4] = {0x15};
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Spi_Cs_Down();
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Spi_Write_Read_1to4(buf, 2);
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Spi_Cs_Up();
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return buf[1];
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}
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/**
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* @Description: SPI flash 读 ID
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* @Input: 无
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* @Output: 返回id
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* @return {*}
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*/
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uint16_t Spiflash_Rdid(void)
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{
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uint8_t buf[4] = {0x90, 0, 0, 0};
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Spi_Cs_Down();
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Spi_Write_Read_1to4(buf, 4);//trans
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Spi_Write_Read_1to4(buf, 2);//recv
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Spi_Cs_Up();
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return *((uint16_t*)buf);
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}
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/**
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* @Description: SPI flash 扇区擦除
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* @Input:
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* @Output:
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* @return {*}
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* @param {uint32_t} addr
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*/
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void Spiflash_Sector_Erase(uint32_t addr)
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{
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uint8_t buf[4] = {0x20};
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buf[3] = addr & 0xff; addr >>= 8;
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buf[2] = addr & 0xff; addr >>= 8;
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buf[1] = addr & 0xff;
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Spiflash_Wren();
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Spi_Cs_Down();
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Spi_Write_Read_1to4(buf, 4);
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Spi_Cs_Up();
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Spiflash_Wait_Wip_Zero();
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}
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/**
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* @Description: SPI flash 64k 块擦除
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* @Input: 地址
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* @Output: 无
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* @return {*}
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* @param {uint32_t} addr
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*/
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void Spiflash_Block64k_Erase(uint32_t addr)
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{
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uint8_t buf[4] = {0xd8};
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buf[3] = addr & 0xff; addr >>= 8;
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buf[2] = addr & 0xff; addr >>= 8;
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buf[1] = addr & 0xff;
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Spiflash_Wren();
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Spi_Cs_Down();
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Spi_Write_Read_1to4(buf, 4);
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Spi_Cs_Up();
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Spiflash_Wait_Wip_Zero();
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}
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/**
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* @Description: SPI flash 页编程
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* @Input: 页地址；数据；
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* @Output: 无
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* @return {*}
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* @param {uint32_t} addr 页地址
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* @param {uint8_t*} data_256 数据缓冲指针
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*/
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void Spiflash_Page_Program(uint32_t addr, uint8_t* data_256,int n)
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{
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uint8_t buf[4] = {0x02};
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buf[3] = addr & 0xff; addr >>= 8;
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buf[2] = addr & 0xff; addr >>= 8;
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buf[1] = addr & 0xff;
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Spiflash_Wren();
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Spi_Cs_Down();
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Spi_Write_Read_1to4(buf, 4);
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Spi_Write_Read_N(data_256, n);
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Spi_Cs_Up();
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Spiflash_Wait_Wip_Zero();
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}
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/**
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* @Description: spi flash 读数据
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* @Input: 地址；数据缓冲；数据量；
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* @Output: 无
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* @return {*}
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* @param {uint32_t} addr
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* @param {uint8_t*} data
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* @param {int} n
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*/
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void Spiflash_Read_Bytes(uint32_t addr, uint8_t* data, int n)
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{
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uint8_t buf[4] = {0x03};
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buf[3] = addr & 0xff; addr >>= 8;
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buf[2] = addr & 0xff; addr >>= 8;
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buf[1] = addr & 0xff;
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Spi_Cs_Down();
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Spi_Write_Read_1to4(buf, 4);
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Spi_Write_Read_N(data, n);
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Spi_Cs_Up();
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}
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/******************************************************************************
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* 函数名： SpiTransByte
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* 功能： 通过SPI接口传输一个字节
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* 输入参数：
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* byte：写入字节
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* 返回值：
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* none
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* 备注：无
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******************************************************************************/
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uint8_t SPI_TransByte(uint8_t byte)
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{
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uint8_t ucResult=0;
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uint8_t retry=0;
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/*清除中断和溢出标志位*/
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SPI->SPSR = 0xc0;
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//判断写寄存器是否为空
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while(!(SPI->SPSR & 0x04))
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{
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retry++;
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if(retry > 200){
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printf("spi no data send\r\n");
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return 0;
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}
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}
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retry = 0;
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SPI->DATA = byte;
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while(SPI->SPSR & 0x01)
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{
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retry++;
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if(retry > 200){
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printf("spi no data receive\r\n");
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return 0;
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}
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}
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ucResult = SPI->DATA;
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return ucResult;
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}
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/******************************************************************************
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* 函数名： SpiFlashCsn0Enable
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* 功能： spi flash csn0 使能
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* 输入参数：
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* none
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* 返回值：
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* none
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* 备注：无
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******************************************************************************/
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void SpiFlashCsn0Enable()
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{
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/*使能片选信号CSN0*/
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SPI->SOFTCS = 0xE1;//E1
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}
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/******************************************************************************
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* 函数名： SpiFlashCsn0Disable
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* 功能： spi flash csn0 不使能
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* 输入参数：
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* none
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* 返回值：
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* none
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* 备注：无
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******************************************************************************/
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void SpiFlashCsn0Disable()
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{
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/*使能片选信号CSN0*/
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SPI->SOFTCS = 0xF1;
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}
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