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bsp/lpc24xx: Simplify EMCDLYCTL handling

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This commit is contained in:
Sebastian Huber
2012-06-11 14:48:42 +02:00
parent f7deb58df0
commit e4bda0469b
1 changed files with 24 additions and 13 deletions
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37
c/src/lib/libbsp/arm/lpc24xx/startup/start-config-emc-dynamic.c
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@@ -23,6 +23,18 @@
#include <bsp/start-config.h>
#include <bsp/lpc24xx.h>
/*
* FIXME: The NXP example code uses different values for the follwing two
* defines. In the NXP example code they depend on the EMCCLK. It is unclear
* how these values are determined. The values from the NXP example code do
* not work.
*/
/* Use command delayed strategy */
#define LPC24XX_EMC_DYNAMIC_READCONFIG_DEFAULT 0x1
#define LPC24XX_EMCDLYCTL_DEFAULT 0x1112
BSP_START_DATA_SECTION const lpc24xx_emc_dynamic_config
lpc24xx_start_config_emc_dynamic [] = {
#if defined(LPC24XX_EMC_MT48LC4M16A2)
@@ -31,8 +43,7 @@ BSP_START_DATA_SECTION const lpc24xx_emc_dynamic_config
/* 15.6 us */
.refresh = LPC24XX_PS_TO_EMCCLK(15600000, 0) / 16,
/* Use command delayed strategy */
.readconfig = 1,
.readconfig = LPC24XX_EMC_DYNAMIC_READCONFIG_DEFAULT,
/* Precharge command period 20 ns */
.trp = 1,
@@ -73,8 +84,7 @@ BSP_START_DATA_SECTION const lpc24xx_emc_dynamic_config
/* 15.6 us */
.refresh = LPC24XX_PS_TO_EMCCLK(15600000, 0) / 16,
/* Use command delayed strategy */
.readconfig = 1,
.readconfig = LPC24XX_EMC_DYNAMIC_READCONFIG_DEFAULT,
/* 20ns */
.trp = LPC24XX_PS_TO_EMCCLK(20000, 1),
@@ -107,7 +117,9 @@ BSP_START_DATA_SECTION const lpc24xx_emc_dynamic_config
.trrd = LPC24XX_PS_TO_EMCCLK(14000, 1),
/* 14ns */
.tmrd = LPC24XX_PS_TO_EMCCLK(14000, 1)
.tmrd = LPC24XX_PS_TO_EMCCLK(14000, 1),
.emcdlyctl = LPC24XX_EMCDLYCTL_DEFAULT
}
#elif defined(LPC24XX_EMC_W9825G2JB75I)
/* Dynamic Memory 0: Winbond W9825G2JB75I */
@@ -115,8 +127,7 @@ BSP_START_DATA_SECTION const lpc24xx_emc_dynamic_config
/* 15.6 us */
.refresh = LPC24XX_PS_TO_EMCCLK(15600000, 0) / 16,
/* Use command delayed strategy */
.readconfig = 1,
.readconfig = LPC24XX_EMC_DYNAMIC_READCONFIG_DEFAULT,
/* 20ns */
.trp = LPC24XX_PS_TO_EMCCLK(20000, 1),
@@ -149,12 +160,14 @@ BSP_START_DATA_SECTION const lpc24xx_emc_dynamic_config
.trrd = 1,
/* (n + 1) clock cycles == 2 * tCK (tRSC)*/
.tmrd = 1
.tmrd = 1,
.emcdlyctl = LPC24XX_EMCDLYCTL_DEFAULT
}
#elif defined(LPC24XX_EMC_K4S561632E)
{
.refresh = 35,
.readconfig = 1,
.readconfig = LPC24XX_EMC_DYNAMIC_READCONFIG_DEFAULT,
.trp = 2,
.tras = 4,
.tsrex = 5,
@@ -172,8 +185,7 @@ BSP_START_DATA_SECTION const lpc24xx_emc_dynamic_config
/* 15.6us */
.refresh = LPC24XX_PS_TO_EMCCLK(15600000, 0) / 16,
/* Use command delayed strategy */
.readconfig = 1,
.readconfig = LPC24XX_EMC_DYNAMIC_READCONFIG_DEFAULT,
/* 20ns */
.trp = LPC24XX_PS_TO_EMCCLK(20000, 1),
@@ -208,8 +220,7 @@ BSP_START_DATA_SECTION const lpc24xx_emc_dynamic_config
/* (n + 1) clock cycles == 2 * tCK */
.tmrd = 1,
/* FIXME */
.emcdlyctl = 0x1112
.emcdlyctl = LPC24XX_EMCDLYCTL_DEFAULT
}
#endif
};