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- ################################################################################
- # Atmel AT91SAM9260-EK eval board
- #
- # http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3933
- #
- # Atmel AT91SAM9260 : PLLA = 198.656 MHz, MCK = 99.328 MHz
- # OSCSEL configured for external 32.768 kHz crystal
- #
- # 32-bit SDRAM : 2 x Micron MT48LC16M16A2, 4M x 16Bit x 4 Banks
- #
- ################################################################################
-
- # We add to the minimal configuration.
- source [find target/at91sam9260.cfg]
-
- # By default S1 is open and this means that NTRST is not connected.
- # The reset_config in target/at91sam9260.cfg is overridden here.
- # (or S1 must be populated with a 0 Ohm resistor)
- reset_config srst_only
-
- $_TARGETNAME configure -event reset-start {
- # At reset CPU runs at 32.768 kHz.
- # JTAG Frequency must be 6 times slower if RCLK is not supported.
- jtag_rclk 5
- halt
- # RSTC_MR : enable user reset, MMU may be enabled... use physical address
- arm926ejs mww phys 0xfffffd08 0xa5000501
- }
-
- $_TARGETNAME configure -event reset-init {
- mww 0xfffffd44 0x00008000 # WDT_MR : disable watchdog
-
- mww 0xfffffc20 0x00004001 # CKGR_MOR : enable the main oscillator
- sleep 20 # wait 20 ms
- mww 0xfffffc30 0x00000001 # PMC_MCKR : switch to main oscillator
- sleep 10 # wait 10 ms
- mww 0xfffffc28 0x2060bf09 # CKGR_PLLAR: Set PLLA Register for 198.656 MHz
- sleep 20 # wait 20 ms
- mww 0xfffffc30 0x00000101 # PMC_MCKR : Select prescaler (divide by 2)
- sleep 10 # wait 10 ms
- mww 0xfffffc30 0x00000102 # PMC_MCKR : Clock from PLLA is selected (99.328 MHz)
- sleep 10 # wait 10 ms
-
- # Increase JTAG Speed to 6 MHz if RCLK is not supported
- jtag_rclk 6000
-
- arm7_9 dcc_downloads enable # Enable faster DCC downloads
-
- mww 0xfffff870 0xffff0000 # PIO_ASR : Select peripheral function for D15..D31
- mww 0xfffff804 0xffff0000 # PIO_PDR : Disable PIO function for D15..D31
-
- mww 0xffffef1c 0x00010002 # EBI_CSA : Assign EBI Chip Select 1 to SDRAM, VDDIOMSEL set for +3V3 memory
-
- mww 0xffffea08 0x85227259 # SDRAMC_CR : Configure SDRAM (2 x Micron MT48LC16M16A2 : 4M x 16Bit x 4 Banks)
-
- mww 0xffffea00 0x1 # SDRAMC_MR : issue a NOP command
- mww 0x20000000 0
- mww 0xffffea00 0x2 # SDRAMC_MR : issue an 'All Banks Precharge' command
- mww 0x20000000 0
- mww 0xffffea00 0x4 # SDRAMC_MR : issue 8 x 'Auto-Refresh' Command
- mww 0x20000000 0
- mww 0xffffea00 0x4
- mww 0x20000000 0
- mww 0xffffea00 0x4
- mww 0x20000000 0
- mww 0xffffea00 0x4
- mww 0x20000000 0
- mww 0xffffea00 0x4
- mww 0x20000000 0
- mww 0xffffea00 0x4
- mww 0x20000000 0
- mww 0xffffea00 0x4
- mww 0x20000000 0
- mww 0xffffea00 0x4
- mww 0x20000000 0
- mww 0xffffea00 0x3 # SDRAMC_MR : issue a 'Load Mode Register' command
- mww 0x20000000 0
- mww 0xffffea00 0x0 # SDRAMC_MR : normal mode
- mww 0x20000000 0
- mww 0xffffea04 0x2b6 # SDRAMC_TR : Set refresh timer count to 7us
- }
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