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Add OV2640 camera support to test the SAMA5 ISI peripheral

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This commit is contained in:
Gregory Nutt 2013-12-09 10:51:22 -06:00
parent 8f11a14535
commit fe2f4aff1f
2 changed files with 17 additions and 8 deletions
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12
arch/arm/src/sama5/chip/sam_pmc.h
View File

@ -268,12 +268,12 @@
/* PMC Programmable Clock Register (0,1,2) */
#define PMC_PCK_CSS_SHIFT (0) /* Bits 0-2: Master Clock Source Selection */
#define PMC_PCK_CSS_MASK (7 << PMC_PCK_CSS_MASK)
# define PMC_PCK_CSS_SLOW (0 << PMC_PCK_CSS_MASK) /* Slow Clock */
# define PMC_PCK_CSS_MAIN (1 << PMC_PCK_CSS_MASK) /* Main Clock */
# define PMC_PCK_CSS_PLLA (2 << PMC_PCK_CSS_MASK) /* PLLA Clock */
# define PMC_PCK_CSS_UPLL (3 << PMC_PCK_CSS_MASK) /* UPLL Clock */
# define PMC_PCK_CSS_MCK (4 << PMC_PCK_CSS_MASK) /* Master Clock */
#define PMC_PCK_CSS_MASK (7 << PMC_PCK_CSS_SHIFT)
# define PMC_PCK_CSS_SLOW (0 << PMC_PCK_CSS_SHIFT) /* Slow Clock */
# define PMC_PCK_CSS_MAIN (1 << PMC_PCK_CSS_SHIFT) /* Main Clock */
# define PMC_PCK_CSS_PLLA (2 << PMC_PCK_CSS_SHIFT) /* PLLA Clock */
# define PMC_PCK_CSS_UPLL (3 << PMC_PCK_CSS_SHIFT) /* UPLL Clock */
# define PMC_PCK_CSS_MCK (4 << PMC_PCK_CSS_SHIFT) /* Master Clock */
#define PMC_PCK_PRES_SHIFT (4) /* Bits 4-6: Programmable Clock Prescaler */
#define PMC_PCK_PRES_MASK (7 << PMC_PCK_PRES_SHIFT)
# define PMC_PCK_PRES_DIV1 (0 << PMC_PCK_PRES_SHIFT) /* Selected clock */

13
arch/arm/src/sama5/sam_pck.c
View File

@ -39,12 +39,20 @@
#include <nuttx/config.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <arch/board/board.h>
#include "chip/sam_pinmap.h"
#include "up_arch.h"
#include "sam_pio.h"
#include "sam_isi.h"
#include "sam_pck.h"
#ifdef CONFIG_SAMA5_ISI
/****************************************************************************
@ -96,12 +104,13 @@ uint32_t sam_pck_configure(enum pckid_e pckid, uint32_t frequency)
{
uint32_t regval;
uint32_t clkin;
uint32_t actual;
/* Pick a clock source. Several are possible but only MCK or PLLA is
* chosen here.
*/
DEBUGASSERT(BOARD_MCK_FREQUENCY < BOARD_PLLA_FREQUENCY)
DEBUGASSERT(BOARD_MCK_FREQUENCY < BOARD_PLLA_FREQUENCY);
if (frequency <= BOARD_MCK_FREQUENCY ||
frequency < BOARD_PLLA_FREQUENCY / 64)
{
@ -158,7 +167,7 @@ uint32_t sam_pck_configure(enum pckid_e pckid, uint32_t frequency)
sdbg("ERROR: frequency cannot be realized.\n");
sdbg(" frequency=%d MCK=%d\n",
frequency, clkin);
return -ERANGE;
return 0;
}
/* Disable the programmable clock, configure the PCK output pin, then set