Mirrors_Framework/rt-thread
1
0
Fork 0
mirror of https://github.com/RT-Thread/rt-thread.git synced 2026-09-23 04:04:15 +08:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity

Use SRAM as EMAC transmit buffer, to avoid the underrun error, especially in the large amount of data communication.

Browse Source
This commit is contained in:
weety
2013-04-08 21:57:24 +08:00
parent aaba8680fb
commit d9d39a8d21
2 changed files with 274 additions and 66 deletions
Download Patch File Download Diff File Expand all files Collapse all files
libcpu/arm/at91sam926x/mmu.c
+1 -1
View File
@@ -471,7 +471,7 @@ void rt_hw_mmu_init(void)
mmu_setmtt(0x00000000, 0xFFFFFFFF, 0x00000000, RW_NCNB); /* None cached for 4G memory */
mmu_setmtt(0x20000000, 0x24000000-1, 0x20000000, RW_CB); /* 64M cached SDRAM memory */
mmu_setmtt(0x00000000, 0x100000, 0x20000000, RW_CB); /* isr vector table */
mmu_setmtt(0x90000000, 0x100000, 0x00000000, RW_CB); /* 4K cached internal memory */
mmu_setmtt(0x90000000, 0x90400000 - 1, 0x00200000, RW_NCNB); /* 4K SRAM0 + 4k SRAM1 */
mmu_setmtt(0xA0000000, 0xA4000000-1, 0x20000000, RW_NCNB); /* 64M none-cached SDRAM memory */
/* set MMU table address */