stm32读取w25Q128的16字节ID
时间: 2023-12-05 16:04:18 浏览: 51
以下是使用STM32读取W25Q128的16字节ID的代码示例:
```c
#include "stm32f4xx.h"
#include "spi.h"
#define W25Q128_CMD_READ_ID 0x90
void W25Q128_ReadID(uint8_t *id)
{
uint8_t txData[5] = { W25Q128_CMD_READ_ID, 0x00, 0x00, 0x00, 0x00 };
uint8_t rxData[20] = { 0 };
// 使能SPI设备
W25Q128_CS_LOW();
// 发送读取ID命令和地址
SPI_TransmitReceiveData(txData, rxData, 5);
// 读取16字节ID数据
for (int i = 0; i < 16; i++)
{
id[i] = rxData[i + 4];
}
// 关闭SPI设备
W25Q128_CS_HIGH();
}
```
此代码假定SPI已经初始化,并且定义了W25Q128_CS_LOW()和W25Q128_CS_HIGH()宏来控制W25Q128的CS引脚。调用W25Q128_ReadID()函数将16字节ID存储在传递给函数的id数组中。
相关问题
stm32读取w25Q128的16位ID
以下是STM32读取W25Q128的16位ID的示例代码:
```c
#include "stm32f10x.h"
#include "spi.h"
#define W25Q128_ID 0xEF16
void W25Q128_Init(void)
{
uint16_t id;
// 初始化SPI接口
SPI_Init();
// 发送读取ID命令
SPI_SelectSlave();
SPI_SendByte(0x90); // 读取ID命令
SPI_SendByte(0x00); // 第一个地址字节
SPI_SendByte(0x00); // 第二个地址字节
SPI_SendByte(0x00); // 第三个地址字节
id = (SPI_ReceiveByte() << 8) | SPI_ReceiveByte(); // 读取16位ID
SPI_DeselectSlave();
// 检查ID是否正确
if (id != W25Q128_ID) {
// 处理错误
}
}
int main(void)
{
W25Q128_Init();
while (1) {
// 循环执行其他操作
}
return 0;
}
```
其中,`SPI_Init()`是初始化SPI接口的函数,`SPI_SelectSlave()`和`SPI_DeselectSlave()`是选中和取消选中W25Q128从设备的函数,`SPI_SendByte()`和`SPI_ReceiveByte()`是发送和接收字节的函数。在读取ID时,先发送读取ID命令,然后发送3个地址字节,最后读取16位ID并进行检查。如果ID不正确,则需要处理错误。
stm32读取w25Q128的8字节ID
以下是一个示例代码,使用SPI接口读取W25Q128的8字节ID:
```
#include "stm32f4xx.h"
#include "stm32f4xx_spi.h"
#include "stm32f4xx_gpio.h"
#define SPIx SPI1
#define SPIx_CLK RCC_APB2Periph_SPI1
#define SPIx_CS_PIN GPIO_Pin_4
#define SPIx_CS_GPIO_PORT GPIOA
#define SPIx_CS_GPIO_CLK RCC_AHB1Periph_GPIOA
#define SPIx_MOSI_PIN GPIO_Pin_7
#define SPIx_MOSI_GPIO_PORT GPIOA
#define SPIx_MOSI_GPIO_CLK RCC_AHB1Periph_GPIOA
#define SPIx_MOSI_SOURCE GPIO_PinSource7
#define SPIx_MOSI_AF GPIO_AF_SPI1
#define SPIx_MISO_PIN GPIO_Pin_6
#define SPIx_MISO_GPIO_PORT GPIOA
#define SPIx_MISO_GPIO_CLK RCC_AHB1Periph_GPIOA
#define SPIx_MISO_SOURCE GPIO_PinSource6
#define SPIx_MISO_AF GPIO_AF_SPI1
#define SPIx_SCK_PIN GPIO_Pin_5
#define SPIx_SCK_GPIO_PORT GPIOA
#define SPIx_SCK_GPIO_CLK RCC_AHB1Periph_GPIOA
#define SPIx_SCK_SOURCE GPIO_PinSource5
#define SPIx_SCK_AF GPIO_AF_SPI1
void SPIx_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
/* SPIx_CS_GPIO, SPIx_MOSI_GPIO, SPIx_MISO_GPIO and SPIx_SCK_GPIO Periph clock enable */
RCC_AHB1PeriphClockCmd(SPIx_CS_GPIO_CLK | SPIx_MOSI_GPIO_CLK | SPIx_MISO_GPIO_CLK | SPIx_SCK_GPIO_CLK, ENABLE);
/* SPIx Periph clock enable */
RCC_APB2PeriphClockCmd(SPIx_CLK, ENABLE);
/* Configure SPIx_CS_PIN in output pushpull mode */
GPIO_InitStructure.GPIO_Pin = SPIx_CS_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(SPIx_CS_GPIO_PORT, &GPIO_InitStructure);
/* Configure SPIx pins: SCK, MISO and MOSI */
GPIO_InitStructure.GPIO_Pin = SPIx_SCK_PIN | SPIx_MISO_PIN | SPIx_MOSI_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Connect SPIx pins to AF */
GPIO_PinAFConfig(SPIx_SCK_GPIO_PORT, SPIx_SCK_SOURCE, SPIx_SCK_AF);
GPIO_PinAFConfig(SPIx_MISO_GPIO_PORT, SPIx_MISO_SOURCE, SPIx_MISO_AF);
GPIO_PinAFConfig(SPIx_MOSI_GPIO_PORT, SPIx_MOSI_SOURCE, SPIx_MOSI_AF);
/* SPIx configuration ------------------------------------------------------*/
SPI_I2S_DeInit(SPIx);
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPIx, &SPI_InitStructure);
/* Enable SPIx */
SPI_Cmd(SPIx, ENABLE);
}
uint8_t SPIx_ReadWriteByte(uint8_t data)
{
/* Wait until the transmit buffer is empty */
while (SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_TXE) == RESET);
/* Send the byte */
SPI_I2S_SendData(SPIx, data);
/* Wait until a data is received */
while (SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_RXNE) == RESET);
/* Get the received data */
return SPI_I2S_ReceiveData(SPIx);
}
uint32_t W25Q128_ReadID(void)
{
uint32_t id = 0;
SPIx_CS_GPIO_PORT->BSRRH = SPIx_CS_PIN; // set CS low
SPIx_ReadWriteByte(0x90); // send read ID command
SPIx_ReadWriteByte(0x00); // send address byte 1
SPIx_ReadWriteByte(0x00); // send address byte 2
SPIx_ReadWriteByte(0x00); // send address byte 3
id |= SPIx_ReadWriteByte(0xFF) << 16;
id |= SPIx_ReadWriteByte(0xFF) << 8;
id |= SPIx_ReadWriteByte(0xFF);
SPIx_CS_GPIO_PORT->BSRRL = SPIx_CS_PIN; // set CS high
return id;
}
int main(void)
{
SPIx_Init();
uint32_t id = W25Q128_ReadID();
return 0;
}
```