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bsp/lpc24xx: Simplify EMC configuration

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Sebastian Huber committed 2012-06-15 15:59:33 +02:00
1 parent d40b09d7e8
commit f7deb58df0
3 files changed
+116 -124
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c/src/lib/libbsp/arm/lpc24xx/include/start-config.h
+14
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@@ -34,6 +34,20 @@
extern "C" {
#endif /* __cplusplus */
/**
* @brief Pico seconds @a ps to clock ticks for clock frequency @a f.
*/
#define LPC24XX_PS_TO_CLK(ps, f) \
(((((uint64_t) (ps)) * ((uint64_t) (f))) + 1000000000000ULL - 1ULL) \
/ 1000000000000ULL)
/**
* @brief Pico seconds @a ps to EMCCLK clock ticks adjusted by @a m.
*/
#define LPC24XX_PS_TO_EMCCLK(ps, m) \
(LPC24XX_PS_TO_CLK(ps, LPC24XX_EMCCLK) > (m) ? \
LPC24XX_PS_TO_CLK(ps, LPC24XX_EMCCLK) - (m) : 0)
typedef struct {
uint32_t refresh;
uint32_t readconfig;
c/src/lib/libbsp/arm/lpc24xx/startup/start-config-emc-dynamic.c
+76 -98
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File diff suppressed because it is too large. Load diff
c/src/lib/libbsp/arm/lpc24xx/startup/start-config-emc-static.c
+26 -26
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@@ -65,7 +65,7 @@ BSP_START_DATA_SECTION const lpc24xx_emc_static_chip_config
}
}
#elif defined(LPC24XX_EMC_M29W320E70)
/* Static Memory 0: M29W320E70 at 51612800Hz (tCK = 19.4ns) */
/* Static Memory 0: M29W320E70 */
{
.chip_select = (volatile lpc_emc_static *) EMC_STA_BASE_0,
.config = {
@@ -75,27 +75,27 @@ BSP_START_DATA_SECTION const lpc24xx_emc_static_chip_config
*/
.config = 0x81,
/* (n + 1) clock cycles -> 38.8ns >= 30ns (tWHWL) */
.waitwen = 1,
/* 30ns (tWHWL) */
.waitwen = LPC24XX_PS_TO_EMCCLK(30000, 1),
/* (n + 1) clock cycles -> 19.4ns >= 0ns */
.waitoen = 0,
/* 0ns */
.waitoen = LPC24XX_PS_TO_EMCCLK(0, 1),
/* (n + 1) clock cycles -> 77.5ns >= 70ns (tAVQV, tELQV) */
.waitrd = 3,
/* 70ns (tAVQV, tELQV) */
.waitrd = LPC24XX_PS_TO_EMCCLK(70000, 1),
/* (n + 1) clock cycles -> 77.5ns >= 70ns (tAVQV, tELQV) */
.waitpage = 3,
/* 70ns (tAVQV, tELQV) */
.waitpage = LPC24XX_PS_TO_EMCCLK(70000, 1),
/* (n + 2) clock cycles -> 58.1ns >= 45ns (tWLWH) */
.waitwr = 1,
/* 45ns (tWLWH) */
.waitwr = LPC24XX_PS_TO_EMCCLK(45000, 2),
/* (n + 1) clock cycles -> 38.8ns >= 25ns (tEHQZ) */
.waitrun = 1
/* 25ns (tEHQZ) */
.waitrun = LPC24XX_PS_TO_EMCCLK(25000, 1)
}
}
#elif defined(LPC24XX_EMC_SST39VF3201)
/* Static Memory 0: SST39VF3201 at 51612800Hz (tCK = 19.4ns) */
/* Static Memory 0: SST39VF3201 */
{
.chip_select = (volatile lpc_emc_static *) EMC_STA_BASE_0,
.config = {
@@ -105,23 +105,23 @@ BSP_START_DATA_SECTION const lpc24xx_emc_static_chip_config
*/
.config = 0x81,
/* (n + 1) clock cycles -> 19.4ns >= 0ns (tCS, tAS) */
.waitwen = 0,
/* 0ns (tCS, tAS) */
.waitwen = LPC24XX_PS_TO_EMCCLK(0, 1),
/* (n + 1) clock cycles -> 19.4ns >= 0ns (tOES) */
.waitoen = 0,
/* 0ns (tOES) */
.waitoen = LPC24XX_PS_TO_EMCCLK(0, 1),
/* (n + 1) clock cycles -> 77.5ns >= 70ns (tRC) */
.waitrd = 2,
/* 70ns (tRC) */
.waitrd = LPC24XX_PS_TO_EMCCLK(70000, 1),
/* (n + 1) clock cycles -> 77.5ns >= 70ns (tRC) */
.waitpage = 2,
/* 70ns (tRC) */
.waitpage = LPC24XX_PS_TO_EMCCLK(70000, 1),
/* (n + 2) clock cycles -> 38.8ns >= 20ns (tCHZ, TOHZ) */
.waitwr = 0,
/* 20ns (tCHZ, TOHZ) */
.waitwr = LPC24XX_PS_TO_EMCCLK(20000, 2),
/* (n + 1) clock cycles -> 38.8ns >= 20ns (tCHZ, TOHZ) */
.waitrun = 1
/* 20ns (tCHZ, TOHZ) */
.waitrun = LPC24XX_PS_TO_EMCCLK(20000, 1)
}
}
#endif