GD32的话,C语言写一下读取25Q04的方法
时间: 2024-01-27 13:03:05 浏览: 22
好的,以下是使用C语言在GD32微控制器上读取FM25Q04芯片数据的基本方法,假设您已经完成了SPI接口的初始化:
```c
#include "gd32f30x.h"
#include <stdio.h>
/* 定义FM25Q04芯片的命令 */
#define CMD_READ_DATA 0x03 /* 读取数据命令 */
#define CMD_WRITE_EN 0x06 /* 写使能命令 */
#define CMD_READ_SR1 0x05 /* 读取状态寄存器1命令 */
/* 定义芯片页大小和块大小 */
#define PAGE_SIZE 256 /* 页大小为256字节 */
#define BLOCK_SIZE 16 /* 块大小为16页 */
/* 定义SPI接口对象 */
spi_parameter_struct spi_init_struct;
spi_bit_endian_struct spi_bit_endian;
spi_crc_polynomial_enum spi_crc_poly;
spi_nss_internal_software_or_hw_do_not_use_spi_crc_enum spi_crc_length;
/* 定义读取数据的函数 */
int read_fm25q04_data(uint32_t address, uint8_t *buf, uint32_t len)
{
uint8_t cmd[4];
uint8_t status;
uint32_t page_addr, page_offset;
uint32_t i, j;
/* 计算页地址和页内偏移量 */
page_addr = address / PAGE_SIZE;
page_offset = address % PAGE_SIZE;
/* 发送写使能命令 */
cmd[0] = CMD_WRITE_EN;
spi_nss_internal_high(GPIOA, GPIO_PIN_4); /* 禁用CS引脚 */
spi_i2s_data_transmit(SPI0, cmd[0]);
while (spi_i2s_flag_get(SPI0, SPI_FLAG_TBE) == RESET);
spi_nss_internal_low(GPIOA, GPIO_PIN_4); /* 使能CS引脚 */
/* 等待写使能命令生效 */
delay_us(1);
/* 发送读取数据命令 */
cmd[0] = CMD_READ_DATA;
cmd[1] = (page_addr >> 8) & 0xff;
cmd[2] = page_addr & 0xff;
cmd[3] = 0x00;
spi_nss_internal_high(GPIOA, GPIO_PIN_4); /* 禁用CS引脚 */
spi_i2s_data_transmit(SPI0, cmd[0]);
while (spi_i2s_flag_get(SPI0, SPI_FLAG_TBE) == RESET);
spi_i2s_data_transmit(SPI0, cmd[1]);
while (spi_i2s_flag_get(SPI0, SPI_FLAG_TBE) == RESET);
spi_i2s_data_transmit(SPI0, cmd[2]);
while (spi_i2s_flag_get(SPI0, SPI_FLAG_TBE) == RESET);
spi_i2s_data_transmit(SPI0, cmd[3]);
while (spi_i2s_flag_get(SPI0, SPI_FLAG_TBE) == RESET);
spi_nss_internal_low(GPIOA, GPIO_PIN_4); /* 使能CS引脚 */
for (i = 0; i < page_offset; i++) {
while (spi_i2s_flag_get(SPI0, SPI_FLAG_RBNE) == RESET);
spi_i2s_data_receive(SPI0);
}
for (j = 0; j < len; j++) {
while (spi_i2s_flag_get(SPI0, SPI_FLAG_RBNE) == RESET);
*buf = spi_i2s_data_receive(SPI0);
buf++;
}
spi_nss_internal_high(GPIOA, GPIO_PIN_4); /* 禁用CS引脚 */
/* 读取状态寄存器1 */
cmd[0] = CMD_READ_SR1;
spi_nss_internal_high(GPIOA, GPIO_PIN_4); /* 禁用CS引脚 */
spi_i2s_data_transmit(SPI0, cmd[0]);
while (spi_i2s_flag_get(SPI0, SPI_FLAG_TBE) == RESET);
while (spi_i2s_flag_get(SPI0, SPI_FLAG_RBNE) == RESET);
status = spi_i2s_data_receive(SPI0);
spi_nss_internal_low(GPIOA, GPIO_PIN_4); /* 使能CS引脚 */
/* 检查读取状态 */
if ((status & 0x01) != 0) {
return -1; /* 读取失败 */
}
return 0; /* 读取成功 */
}
```
以上是一个简单的读取FM25Q04芯片数据的示例代码,其中包括了发送命令、读取数据、检查状态等步骤。具体的实现方法可能因为使用的硬件和软件环境而有所不同,建议您根据实际情况进行修改和优化。