W25Q64怎么在STM32上存储中文字库的程序代码
时间: 2023-05-26 22:03:01 浏览: 198
W25Q64是一种SPI接口的闪存,可以用来存储程序代码和数据。对于中文字库的存储,可以使用以下步骤:
1. 准备好中文字库文件,可以是二进制或ASCII格式。
2. 将中文字库文件加载到STM32的内存中。
3. 初始化SPI接口和W25Q64芯片,使其能够正常工作。
4. 将中文字库数据通过SPI接口写入W25Q64芯片中,可以选择一个固定的地址作为存储位置。
5. 在程序中使用SPI接口从W25Q64中读取所需的中文字库数据,并进行相应的处理。
以下是一个简单的代码示例,仅供参考:
```c
#include <stdio.h>
#include "stm32f4xx.h"
#define W25Q64_CS_PIN GPIO_Pin_4
#define W25Q64_CS_PORT GPIOD
void init_SPI2(void)
{
SPI_InitTypeDef SPI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_SPI2);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_SPI2);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_SPI2);
SPI_I2S_DeInit(SPI2);
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_Init(SPI2, &SPI_InitStructure);
SPI_Cmd(SPI2, ENABLE);
}
void init_W25Q64(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
GPIO_InitStructure.GPIO_Pin = W25Q64_CS_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(W25Q64_CS_PORT, &GPIO_InitStructure);
GPIO_SetBits(W25Q64_CS_PORT, W25Q64_CS_PIN);
}
void SPI_write(uint8_t data)
{
while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET);
SPI_I2S_SendData(SPI2, data);
}
uint8_t SPI_read(void)
{
while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET);
return (uint8_t)SPI_I2S_ReceiveData(SPI2);
}
void W25Q64_write_enable(void)
{
GPIO_ResetBits(W25Q64_CS_PORT, W25Q64_CS_PIN);
SPI_write(0x06);
GPIO_SetBits(W25Q64_CS_PORT, W25Q64_CS_PIN);
}
uint8_t W25Q64_read_status_register(void)
{
uint8_t val;
GPIO_ResetBits(W25Q64_CS_PORT, W25Q64_CS_PIN);
SPI_write(0x05);
SPI_write(0x00);
val = SPI_read();
GPIO_SetBits(W25Q64_CS_PORT, W25Q64_CS_PIN);
return val;
}
void W25Q64_write_byte(uint32_t addr, uint8_t data)
{
W25Q64_write_enable();
GPIO_ResetBits(W25Q64_CS_PORT, W25Q64_CS_PIN);
SPI_write(0x02);
SPI_write((uint8_t)((addr >> 16) & 0xFF));
SPI_write((uint8_t)((addr >> 8) & 0xFF));
SPI_write((uint8_t)(addr & 0xFF));
SPI_write(data);
GPIO_SetBits(W25Q64_CS_PORT, W25Q64_CS_PIN);
while (W25Q64_read_status_register() & 0x01);
}
uint8_t W25Q64_read_byte(uint32_t addr)
{
uint8_t val;
GPIO_ResetBits(W25Q64_CS_PORT, W25Q64_CS_PIN);
SPI_write(0x03);
SPI_write((uint8_t)((addr >> 16) & 0xFF));
SPI_write((uint8_t)((addr >> 8) & 0xFF));
SPI_write((uint8_t)(addr & 0xFF));
val = SPI_read();
GPIO_SetBits(W25Q64_CS_PORT, W25Q64_CS_PIN);
return val;
}
void write_font_to_flash(uint8_t *font_data, uint32_t size)
{
uint32_t i;
init_SPI2();
init_W25Q64();
for (i = 0; i < size; i++)
{
W25Q64_write_byte(0x08080000 + i, *(font_data + i));
}
printf("Font data written to W25Q64.\n");
}
void read_font_from_flash(uint8_t *font_data, uint32_t size)
{
uint32_t i;
init_SPI2();
init_W25Q64();
for (i = 0; i < size; i++)
{
*(font_data + i) = W25Q64_read_byte(0x08080000 + i);
}
printf("Font data read from W25Q64.\n");
}
int main(void)
{
uint8_t font_data[1024];
/* Write the font data to W25Q64 */
write_font_to_flash(font_data, sizeof(font_data));
/* Read the font data from W25Q64 */
read_font_from_flash(font_data, sizeof(font_data));
/* Do something with the font data */
while (1);
return 0;
}
```
该代码示例中使用的SPI2端口和W25Q64的CS引脚可以根据具体情况进行修改。在读写数据时,可以使用W25Q64的扇区地址加上偏移量作为绝对地址,然后进行读写操作。使用该代码示例可以完成将中文字库数据存储到W25Q64中,并在程序运行时从W25Q64中读取数据进行处理的功能。
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