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the unit of read/write offset and buffer size is changed to the block size in block device driver read/write interface.

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git-svn-id: https://rt-thread.googlecode.com/svn/trunk@795 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong@gmail.com 2010-07-14 23:45:38 +00:00
parent b669237ae4
commit 731711f74f
1 changed files with 4 additions and 6 deletions
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10
bsp/lpc176x/sd.c
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@ -374,11 +374,10 @@ static rt_err_t rt_sdcard_close(rt_device_t dev)
static rt_size_t rt_sdcard_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
{
bool status;
rt_uint32_t nr = size / SD_SECTOR_SIZE;
status = LPC17xx_SD_ReadSector(part.offset + pos/SECTOR_SIZE, buffer, nr);
status = LPC17xx_SD_ReadSector(part.offset + pos, buffer, size);
if (status == true) return nr * SECTOR_SIZE;
if (status == true) return size;
rt_kprintf("read failed: %d, pos 0x%08x, size %d\n", status, pos, size);
return 0;
@ -387,11 +386,10 @@ static rt_size_t rt_sdcard_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_
static rt_size_t rt_sdcard_write (rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size)
{
bool status;
rt_uint32_t nr = size / SD_SECTOR_SIZE;
status = LPC17xx_SD_WriteSector(part.offset + pos/SECTOR_SIZE, buffer, nr);
status = LPC17xx_SD_WriteSector(part.offset + pos, buffer, size);
if (status == true) return nr * SECTOR_SIZE;
if (status == true) return size;
rt_kprintf("write failed: %d, pos 0x%08x, size %d\n", status, pos, size);
return 0;