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STM32H750XB_RT-THREAD/25-FMC—扩展外部NAND/User/malloc/malloc.c

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STM32H750 RTThread 例程
2025-07-21 06:34:29 +00:00
#include "./malloc/malloc.h"
//<2F>ڴ<EFBFBD><DAB4><EFBFBD>(32<33>ֽڶ<D6BD><DAB6><EFBFBD>)
__align(32) uint8_t mem1base[MEM1_MAX_SIZE]; //<2F>ڲ<EFBFBD>SRAM<41>ڴ<EFBFBD><DAB4><EFBFBD>
__align(32) uint8_t mem2base[MEM2_MAX_SIZE] __attribute__((at(0xD0000000))); //<2F>ⲿSRAM<41>ڴ<EFBFBD><DAB4><EFBFBD>
//<2F>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
uint16_t mem1mapbase[MEM1_ALLOC_TABLE_SIZE]; //<2F>ڲ<EFBFBD>SRAM<41>ڴ<EFBFBD><DAB4><EFBFBD>MAP
uint16_t mem2mapbase[MEM2_ALLOC_TABLE_SIZE] __attribute__((at(0xD0000000+MEM2_MAX_SIZE))); //<2F>ⲿSRAM<41>ڴ<EFBFBD><DAB4><EFBFBD>MAP
//<2F>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
const uint32_t memtblsize[SRAMBANK]={MEM1_ALLOC_TABLE_SIZE,MEM2_ALLOC_TABLE_SIZE}; //<2F>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD>С
const uint32_t memblksize[SRAMBANK]={MEM1_BLOCK_SIZE,MEM2_BLOCK_SIZE}; //<2F>ڴ<EFBFBD><DAB4>ֿ<EFBFBD><D6BF><EFBFBD>С
const uint32_t memsize[SRAMBANK]={MEM1_MAX_SIZE,MEM2_MAX_SIZE}; //<2F>ڴ<EFBFBD><DAB4>ܴ<EFBFBD>С
//<2F>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
struct _m_mallco_dev mallco_dev=
{
my_mem_init, //<2F>ڴ<EFBFBD><DAB4><EFBFBD>ʼ<EFBFBD><CABC>
my_mem_perused, //<2F>ڴ<EFBFBD>ʹ<EFBFBD><CAB9><EFBFBD><EFBFBD>
mem1base,mem2base, //<2F>ڴ<EFBFBD><DAB4><EFBFBD>
mem1mapbase,mem2mapbase, //<2F>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD>״̬<D7B4><CCAC>
0,0, //<2F>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD>δ<EFBFBD><CEB4><EFBFBD><EFBFBD>
};
//<2F><><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>
//*des:Ŀ<>ĵ<EFBFBD>ַ
//*src:Դ<><D4B4>ַ
//n:<3A><>Ҫ<EFBFBD><D2AA><EFBFBD>Ƶ<EFBFBD><C6B5>ڴ泤<DAB4><E6B3A4>(<28>ֽ<EFBFBD>Ϊ<EFBFBD><CEAA>λ)
void mymemcpy(void *des,void *src,uint32_t n)
{
uint8_t *xdes=des;
uint8_t *xsrc=src;
while(n--)*xdes++=*xsrc++;
}
//<2F><><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>
//*s:<3A>ڴ<EFBFBD><DAB4>׵<EFBFBD>ַ
//c :Ҫ<><D2AA><EFBFBD>õ<EFBFBD>ֵ
//count:<3A><>Ҫ<EFBFBD><D2AA><EFBFBD>õ<EFBFBD><C3B5>ڴ<EFBFBD><DAB4><EFBFBD>С(<28>ֽ<EFBFBD>Ϊ<EFBFBD><CEAA>λ)
void mymemset(void *s,uint8_t c,uint32_t count)
{
uint8_t *xs = s;
while(count--)*xs++=c;
}
//<2F>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC>
//memx:<3A><><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD>
void my_mem_init(uint8_t memx)
{
mymemset(mallco_dev.memmap[memx], 0,memtblsize[memx]*2);//<2F>ڴ<EFBFBD>״̬<D7B4><CCAC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
mymemset(mallco_dev.membase[memx], 0,memsize[memx]); //<2F>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
mallco_dev.memrdy[memx]=1; //<2F>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC>OK
}
//<2F><>ȡ<EFBFBD>ڴ<EFBFBD>ʹ<EFBFBD><CAB9><EFBFBD><EFBFBD>
//memx:<3A><><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD>
//<2F><><EFBFBD><EFBFBD>ֵ:ʹ<><CAB9><EFBFBD><EFBFBD>(0~100)
uint8_t my_mem_perused(uint8_t memx)
{
uint32_t used=0;
uint32_t i;
for(i=0;i<memtblsize[memx];i++)
{
if(mallco_dev.memmap[memx][i])used++;
}
return (used*100)/(memtblsize[memx]);
}
//<2F>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD>(<28>ڲ<EFBFBD><DAB2><EFBFBD><EFBFBD><EFBFBD>)
//memx:<3A><><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD>
//size:Ҫ<><D2AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD>С(<28>ֽ<EFBFBD>)
//<2F><><EFBFBD><EFBFBD>ֵ:0XFFFFFFFF,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;<3B><><EFBFBD><EFBFBD>,<2C>ڴ<EFBFBD>ƫ<EFBFBD>Ƶ<EFBFBD>ַ
uint32_t my_mem_malloc(uint8_t memx,uint32_t size)
{
signed long offset=0;
uint32_t nmemb; //<2F><>Ҫ<EFBFBD><D2AA><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD>
uint32_t cmemb=0;//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD>
uint32_t i;
if(!mallco_dev.memrdy[memx])mallco_dev.init(memx);//δ<><CEB4>ʼ<EFBFBD><CABC>,<2C><>ִ<EFBFBD>г<EFBFBD>ʼ<EFBFBD><CABC>
if(size==0)
return 0XFFFFFFFF;//<2F><><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD>
nmemb=size/memblksize[memx]; //<2F><>ȡ<EFBFBD><C8A1>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD>
if(size%memblksize[memx])nmemb++;
for(offset=memtblsize[memx]-1;offset>=0;offset--)//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
{
if(!mallco_dev.memmap[memx][offset])cmemb++;//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
else cmemb=0; //<2F><><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
if(cmemb==nmemb) //<2F>ҵ<EFBFBD><D2B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>nmemb<6D><62><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD>
{
for(i=0;i<nmemb;i++) //<2F><>ע<EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD>ǿ<EFBFBD>
{
mallco_dev.memmap[memx][offset+i]=nmemb;
}
return (offset*memblksize[memx]);//<2F><><EFBFBD><EFBFBD>ƫ<EFBFBD>Ƶ<EFBFBD>ַ
}
}
return 0XFFFFFFFF;//δ<>ҵ<EFBFBD><D2B5><EFBFBD><EFBFBD>Ϸ<EFBFBD><CFB7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD>
}
//<2F>ͷ<EFBFBD><CDB7>ڴ<EFBFBD>(<28>ڲ<EFBFBD><DAB2><EFBFBD><EFBFBD><EFBFBD>)
//memx:<3A><><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD>
//offset:<3A>ڴ<EFBFBD><DAB4><EFBFBD>ַƫ<D6B7><C6AB>
//<2F><><EFBFBD><EFBFBD>ֵ:0,<2C>ͷųɹ<C5B3>;1,<2C>ͷ<EFBFBD>ʧ<EFBFBD><CAA7>;
uint8_t my_mem_free(uint8_t memx,uint32_t offset)
{
int i;
if(!mallco_dev.memrdy[memx])//δ<><CEB4>ʼ<EFBFBD><CABC>,<2C><>ִ<EFBFBD>г<EFBFBD>ʼ<EFBFBD><CABC>
{
mallco_dev.init(memx);
return 1;//δ<><CEB4>ʼ<EFBFBD><CABC>
}
if(offset<memsize[memx])//ƫ<><C6AB><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD>.
{
int index=offset/memblksize[memx]; //ƫ<><C6AB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
int nmemb=mallco_dev.memmap[memx][index]; //<2F>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
for(i=0;i<nmemb;i++) //<2F>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
{
mallco_dev.memmap[memx][index+i]=0;
}
return 0;
}
else
return 2;//ƫ<>Ƴ<EFBFBD><C6B3><EFBFBD><EFBFBD><EFBFBD>.
}
//<2F>ͷ<EFBFBD><CDB7>ڴ<EFBFBD>(<28>ⲿ<EFBFBD><E2B2BF><EFBFBD><EFBFBD>)
//memx:<3A><><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD>
//ptr:<3A>ڴ<EFBFBD><DAB4>׵<EFBFBD>ַ
void myfree(uint8_t memx,void *ptr)
{
uint32_t offset;
if(ptr==NULL)return;//<2F><>ַΪ0.
offset=(uint32_t)ptr-(uint32_t)mallco_dev.membase[memx];
my_mem_free(memx,offset); //<2F>ͷ<EFBFBD><CDB7>ڴ<EFBFBD>
}
//<2F><><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>(<28>ⲿ<EFBFBD><E2B2BF><EFBFBD><EFBFBD>)
//memx:<3A><><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD>
//size:<3A>ڴ<EFBFBD><DAB4><EFBFBD>С(<28>ֽ<EFBFBD>)
//<2F><><EFBFBD><EFBFBD>ֵ:<3A><><EFBFBD>䵽<EFBFBD><E4B5BD><EFBFBD>ڴ<EFBFBD><DAB4>׵<EFBFBD>ַ.
void *mymalloc(uint8_t memx,uint32_t size)
{
uint32_t offset;
offset=my_mem_malloc(memx,size);
if(offset==0XFFFFFFFF)return NULL;
else return (void*)((uint32_t)mallco_dev.membase[memx]+offset);
}
//<2F><><EFBFBD>·<EFBFBD><C2B7><EFBFBD><EFBFBD>ڴ<EFBFBD>(<28>ⲿ<EFBFBD><E2B2BF><EFBFBD><EFBFBD>)
//memx:<3A><><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD>
//*ptr:<3A><><EFBFBD>ڴ<EFBFBD><DAB4>׵<EFBFBD>ַ
//size:Ҫ<><D2AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD>С(<28>ֽ<EFBFBD>)
//<2F><><EFBFBD><EFBFBD>ֵ:<3A>·<EFBFBD><C2B7>䵽<EFBFBD><E4B5BD><EFBFBD>ڴ<EFBFBD><DAB4>׵<EFBFBD>ַ.
void *myrealloc(uint8_t memx,void *ptr,uint32_t size)
{
uint32_t offset;
offset=my_mem_malloc(memx,size);
if(offset==0XFFFFFFFF)return NULL;
else
{
mymemcpy((void*)((uint32_t)mallco_dev.membase[memx]+offset),ptr,size); //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD>ݵ<EFBFBD><DDB5><EFBFBD><EFBFBD>ڴ<EFBFBD>
myfree(memx,ptr); //<2F>ͷž<CDB7><C5BE>ڴ<EFBFBD>
return (void*)((uint32_t)mallco_dev.membase[memx]+offset); //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4>׵<EFBFBD>ַ
}
}
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