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bsp/atsam: Add timing for RAM mt48lc16m16a2p-6a.

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This commit is contained in:
Christian Mauderer
2017-07-28 11:11:54 +02:00
committed by Sebastian Huber
parent a5d49ebd37
commit 2e2a41ecd9
2 changed files with 58 additions and 0 deletions
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1
c/src/lib/libbsp/arm/atsam/configure.ac
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@@ -56,6 +56,7 @@ AC_ARG_ENABLE(
[case "${enableval}" in
is42s16100e-7bli) AC_DEFINE([ATSAM_SDRAM_IS42S16100E_7BLI],[1],[SDRAM variant]) EXTSDRAM=0x00200000 ;;
is42s16320f-7bl) AC_DEFINE([ATSAM_SDRAM_IS42S16320F_7BL],[1],[SDRAM variant]) EXTSDRAM=0x04000000 ;;
mt48lc16m16a2p-6a) AC_DEFINE([ATSAM_SDRAM_MT48LC16M16A2P_6A],[1],[SDRAM variant]) EXTSDRAM=0x02000000 ;;
*) AC_MSG_ERROR([bad value ${enableval} for SDRAM variant]) ;;
esac],
[AC_DEFINE([ATSAM_SDRAM_IS42S16100E_7BLI],[1],[SDRAM variant]) EXTSDRAM=0x00200000])

57
c/src/lib/libbsp/arm/atsam/startup/sdram-config.c
View File

@@ -74,6 +74,63 @@ const struct BOARD_Sdram_Config BOARD_Sdram_Config = {
SDRAMC_CFR1_TMRD(CLOCK_CYCLES_FROM_NS_MIN(14))
};
#elif defined ATSAM_SDRAM_MT48LC16M16A2P_6A
/*
* Refresh: 7.81 us
* TWR: 12 ns
* TRC_TRFC: 60 ns
* TRP: 15 ns
* TRCD: 18 ns
* TRAS: 42 ns
* TXSR: 67 ns
* TMRD: 2 clock cycles
*/
#if ATSAM_MCK == 60000000
const struct BOARD_Sdram_Config BOARD_Sdram_Config = {
.sdramc_tr = 0x1D4,
.sdramc_cr =
SDRAMC_CR_NC_COL9
| SDRAMC_CR_NR_ROW13
| SDRAMC_CR_NB_BANK4
| SDRAMC_CR_CAS_LATENCY3
| SDRAMC_CR_DBW
| SDRAMC_CR_TWR(3)
| SDRAMC_CR_TRC_TRFC(8)
| SDRAMC_CR_TRP(3)
| SDRAMC_CR_TRCD(3)
| SDRAMC_CR_TRAS(5)
| SDRAMC_CR_TXSR(9),
.sdramc_mdr = SDRAMC_MDR_MD_SDRAM,
.sdramc_cfr1 = SDRAMC_CFR1_UNAL_SUPPORTED |
SDRAMC_CFR1_TMRD(2)
};
#elif ATSAM_MCK == 123000000
const struct BOARD_Sdram_Config BOARD_Sdram_Config = {
.sdramc_tr = 960,
.sdramc_cr =
SDRAMC_CR_NC_COL9
| SDRAMC_CR_NR_ROW13
| SDRAMC_CR_NB_BANK4
| SDRAMC_CR_CAS_LATENCY3
| SDRAMC_CR_DBW
| SDRAMC_CR_TWR(2)
| SDRAMC_CR_TRC_TRFC(8)
| SDRAMC_CR_TRP(2)
| SDRAMC_CR_TRCD(3)
| SDRAMC_CR_TRAS(6)
| SDRAMC_CR_TXSR(9),
.sdramc_mdr = SDRAMC_MDR_MD_SDRAM,
.sdramc_cfr1 = SDRAMC_CFR1_UNAL_SUPPORTED |
SDRAMC_CFR1_TMRD(2)
};
#else /* ATSAM_MCK unknown */
#error Please check SDRAM settings for this frequency.
#endif
#else
#error SDRAM not supported.
#endif