目录
MySPI.c
包含通信引脚封装、初始化以及SPI通信的3个拼图(起始、终止和交换一个字节)
#include "stm32f10x.h" // Device header
void MySPI_W_SS(uint8_t BitValue) //ss = cs
{
GPIO_WriteBit(GPIOA , GPIO_Pin_4, (BitAction)BitValue);
}
void MySPI_W_SCK(uint8_t BitValue)
{
GPIO_WriteBit(GPIOA , GPIO_Pin_5, (BitAction)BitValue);
}
void MySPI_W_MOSI(uint8_t BitValue)
{
GPIO_WriteBit(GPIOA , GPIO_Pin_7, (BitAction)BitValue);
}
uint8_t MySPI_R_MISO(void)
{
return GPIO_ReadInputDataBit(GPIOA , GPIO_Pin_6);
}
void MySPI_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
MySPI_W_SS(1);
MySPI_W_SCK(0);
}
void MySPI_Start(void)
{
MySPI_W_SS(0);
}
void MySPI_Stop(void)
{
MySPI_W_SS(1);
}
uint8_t MySPI_SwapByte(uint8_t ByteSend) //交换字节
{
uint8_t i,ByteReceive = 0x00;
for(i = 0 ; i < 8 ; i++)
{
MySPI_W_MOSI(ByteSend & (0x80 >> i));
MySPI_W_SCK(1); //设置时钟信号 SCK 为高电平,触发从设备读取 MOSI 上的数据
if(MySPI_R_MISO() == 1)
{
ByteReceive |= (0x80 >> i); //最高位存在ByteReceive
}
MySPI_W_SCK(0); //下降沿后,移出数据
}
return ByteReceive;
}
W24Q64.c
使能、擦除、页编程、读数据
在写W24Q64.c时,参考W24Q64手册的Manufacturer and Device Identification
#include "stm32f10x.h" // Device header
#include "MySPI.h"
#include "W25Q64_Ins.h"
void W25Q64_Init(void)
{
MySPI_Init();
}
void W25Q64_ReadID(uint8_t *MID , uint16_t *DID)
{
MySPI_Start();
MySPI_SwapByte(W25Q64_JEDEC_ID);
*MID = MySPI_SwapByte(W25Q64_DUMMY_BYTE);//接收厂商ID
*DID = MySPI_SwapByte(W25Q64_DUMMY_BYTE);//接收设备ID高8位
*DID <<= 8;//左移8位方便接收第八位数据
*DID |= MySPI_SwapByte(W25Q64_DUMMY_BYTE);//接收设备ID低8位
MySPI_Stop();
}
void W25Q64_WriteEnable(void)
{
MySPI_Start();
MySPI_SwapByte(W25Q64_WRITE_ENABLE);
MySPI_Stop();
}
void W25Q64_WaitBusy(void) //先起始,发送指令码,再接收状态寄存器
{
uint32_t Timeout;
MySPI_Start();
MySPI_SwapByte(W25Q64_READ_STATUS_REGISTER_1);
Timeout = 100000;
while ((MySPI_SwapByte(W25Q64_DUMMY_BYTE) & 0x01) == 0x01)
{
Timeout --;
if (Timeout == 0)
{
break;
}
}
MySPI_Stop();
}
void W25Q64_PageProgram(uint32_t Address, uint8_t *DataArray, uint16_t Count)
{
uint16_t i;
W25Q64_WriteEnable();
MySPI_Start();
MySPI_SwapByte(W25Q64_PAGE_PROGRAM);
MySPI_SwapByte(Address >> 16);
MySPI_SwapByte(Address >> 8);
MySPI_SwapByte(Address);
for (i = 0; i < Count; i ++)
{
MySPI_SwapByte(DataArray[i]);
}
MySPI_Stop();
W25Q64_WaitBusy();
}
void W25Q64_SectorErase(uint32_t Address)
{
W25Q64_WriteEnable();
MySPI_Start();
MySPI_SwapByte(W25Q64_SECTOR_ERASE_4KB);
MySPI_SwapByte(Address >> 16);
MySPI_SwapByte(Address >> 8);
MySPI_SwapByte(Address);
MySPI_Stop();
W25Q64_WaitBusy();
}
void W25Q64_ReadData(uint32_t Address, uint8_t *DataArray, uint32_t Count)
{
uint32_t i;
MySPI_Start();
MySPI_SwapByte(W25Q64_READ_DATA);
MySPI_SwapByte(Address >> 16);
MySPI_SwapByte(Address >> 8);
MySPI_SwapByte(Address);
for (i = 0; i < Count; i ++)
{
DataArray[i] = MySPI_SwapByte(W25Q64_DUMMY_BYTE);
}
MySPI_Stop();
}
W25Q64_Ins.h
#ifndef __W25Q64_INS_H
#define __W25Q64_INS_H
#define W25Q64_WRITE_ENABLE 0x06
#define W25Q64_WRITE_DISABLE 0x04
#define W25Q64_READ_STATUS_REGISTER_1 0x05
#define W25Q64_READ_STATUS_REGISTER_2 0x35
#define W25Q64_WRITE_STATUS_REGISTER 0x01
#define W25Q64_PAGE_PROGRAM 0x02
#define W25Q64_QUAD_PAGE_PROGRAM 0x32
#define W25Q64_BLOCK_ERASE_64KB 0xD8
#define W25Q64_BLOCK_ERASE_32KB 0x52
#define W25Q64_SECTOR_ERASE_4KB 0x20
#define W25Q64_CHIP_ERASE 0xC7
#define W25Q64_ERASE_SUSPEND 0x75
#define W25Q64_ERASE_RESUME 0x7A
#define W25Q64_POWER_DOWN 0xB9
#define W25Q64_HIGH_PERFORMANCE_MODE 0xA3
#define W25Q64_CONTINUOUS_READ_MODE_RESET 0xFF
#define W25Q64_RELEASE_POWER_DOWN_HPM_DEVICE_ID 0xAB
#define W25Q64_MANUFACTURER_DEVICE_ID 0x90
#define W25Q64_READ_UNIQUE_ID 0x4B
#define W25Q64_JEDEC_ID 0x9F
#define W25Q64_READ_DATA 0x03
#define W25Q64_FAST_READ 0x0B
#define W25Q64_FAST_READ_DUAL_OUTPUT 0x3B
#define W25Q64_FAST_READ_DUAL_IO 0xBB
#define W25Q64_FAST_READ_QUAD_OUTPUT 0x6B
#define W25Q64_FAST_READ_QUAD_IO 0xEB
#define W25Q64_OCTAL_WORD_READ_QUAD_IO 0xE3
#define W25Q64_DUMMY_BYTE 0xFF
#endif
main.c
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "W25Q64.h"
uint8_t MID;
uint16_t DID;
uint8_t ArrayWrite[] = {0x01, 0x02, 0x03, 0x04};
uint8_t ArrayRead[4];
int main(void)
{
OLED_Init();
W25Q64_Init();
OLED_ShowString(1, 1, "MID: DID:");
OLED_ShowString(2, 1, "W:");
OLED_ShowString(3, 1, "R:");
W25Q64_ReadID(&MID, &DID);
OLED_ShowHexNum(1, 5, MID, 2);
OLED_ShowHexNum(1, 12, DID, 4);
W25Q64_SectorErase(0x000000);
W25Q64_PageProgram(0x000000, ArrayWrite, 4);
W25Q64_ReadData(0x000000, ArrayRead, 4);
OLED_ShowHexNum(2, 3, ArrayWrite[0], 2);
OLED_ShowHexNum(2, 6, ArrayWrite[1], 2);
OLED_ShowHexNum(2, 9, ArrayWrite[2], 2);
OLED_ShowHexNum(2, 12, ArrayWrite[3], 2);
OLED_ShowHexNum(3, 3, ArrayRead[0], 2);
OLED_ShowHexNum(3, 6, ArrayRead[1], 2);
OLED_ShowHexNum(3, 9, ArrayRead[2], 2);
OLED_ShowHexNum(3, 12, ArrayRead[3], 2);
while (1)
{
}
}