#include "sdram.h"
Include dependency graph for sdram.c:
Go to the source code of this file.
Defines | |
| #define | MODE_AUTOREFRESH 4 |
| #define | MODE_EXT_LOAD_MR 5 |
| #define | MODE_LOAD_MR 3 |
| #define | MODE_NOP 1 |
| #define | MODE_NORMAL 0 |
| #define | MODE_POWER_DOWN 6 |
| #define | MODE_PRECHARGE 2 |
Functions | |
| static void | sdram_delay (int us) |
| void | sdramc_init (const sdram_info *info) |
| #define MODE_AUTOREFRESH 4 |
| #define MODE_LOAD_MR 3 |
| #define MODE_NORMAL 0 |
| #define MODE_PRECHARGE 2 |
| static void sdram_delay | ( | int | us | ) | [static] |
Definition at line 46 of file sdram.c.
Referenced by sdramc_init().
00047 { 00048 int i, loop_limit; 00049 00050 loop_limit = us * 20; 00051 00052 for (i=0; i<loop_limit;i++); 00053 00054 }
| void sdramc_init | ( | const sdram_info * | info | ) |
This function will initialize the AVR32 SDRAM Controller
| *info | The setup and timing variables for the controller |
Definition at line 56 of file sdram.c.
References sdram_info::banks, sdram_info::cas, sdram_info::cols, sdram_info::rows, sdram_delay(), sdram_info::tras, sdram_info::trc, sdram_info::trcd, sdram_info::trp, sdram_info::twr, and sdram_info::txsr.
Referenced by main().
00057 { 00058 00059 volatile avr32_sdramc_t *hsdramc = &AVR32_SDRAMC; 00060 volatile avr32_hmatrix_t *hmatrix = &AVR32_HMATRIX; 00061 volatile avr32_pio_t *pio = &AVR32_PIOE; 00062 00063 // Enable SDRAM mode for CS1 in the BAMBI mux 00064 hmatrix->sfr[4] |= 0x0002; 00065 hmatrix->sfr[4] |= 0x0100; 00066 00067 // Initialize data bus bits 31-16 (muxed with the LCDC). 00068 pio->asr |= 0x0000FFFF; 00069 pio->pdr |= 0x0000FFFF; 00070 00071 // Setup SDRAM info 00072 hsdramc->cr = ( (info->cols-8) << AVR32_SDRAMC_CR_NC ) | 00073 ( (info->rows-11) << AVR32_SDRAMC_CR_NR ) | 00074 ( (info->banks-1) << AVR32_SDRAMC_CR_NB ) | 00075 ( info->cas << AVR32_SDRAMC_CR_CAS ) | 00076 ( info->twr << AVR32_SDRAMC_CR_TWR ) | 00077 ( info->trc << AVR32_SDRAMC_CR_TRC ) | 00078 ( info->trp << AVR32_SDRAMC_CR_TRP ) | 00079 ( info->trcd << AVR32_SDRAMC_CR_TRCD ) | 00080 ( info->tras << AVR32_SDRAMC_CR_TRAS ) | 00081 ( info->txsr << AVR32_SDRAMC_CR_TXSR ); 00082 00083 sdram_delay(200); 00084 00085 }
Here is the call graph for this function:
1.5.1