Question

STM32 SPI FLASH 读写问题

用人家的代码修改的后读写好像不行,但这段代码确实是可以读写FLASH 的,这是我的修改版本:

void flash_write(void* address,void* data,long length) {
char print_string[20];
u16 write_index=0;
spi_flash_write_enable();
select_spi();
flash_command(W25X_PAGE_PROGRAM);
flash_command((u8)(long)address>>16);
flash_command((u8)(long)address>>8);
flash_command((u8)(long)address);
for(;write_index<length;++write_index) {
flash_command(*(char*)((long)data+write_index));
sprintf(print_string,"%c",*(char*)((long)data+write_index));
lcd_print(print_string);
}
unselect_spi();
while (spi_flash_is_busy());
}
void flash_read(void* address,void* data,long length) {
char print_string[20];
u16 read_index=0;
sprintf(print_string,"addr=%ld",(long)address);
lcd_print(print_string);
select_spi();
flash_command(W25X_READ_DATA);
flash_command((u8)(long)address>>16);
flash_command((u8)(long)address>>8);
flash_command((u8)(long)address);
for(;read_index<length;++read_index) {
*(char*)((long)data+read_index)=flash_command(0xFF);
sprintf(print_string,"%c",*(char*)((long)data+read_index));
lcd_print(print_string);
}
unselect_spi();
}

就算是数据被正确写入,但修改版的代码一直读不出数据(原来的代码是可以的).不知道哪儿出错了..

Answer 1

传送的参数为什么要用void型啊？address用uint32_t不行么？data用uint8_t不行么？
还有，在写入或读出数据的时候别干多余的事情，把sprintf和lcd_print删掉。

Answer 2

www.openedv.com里面有，你找找