diff options
Diffstat (limited to 'nuttx/configs/sama5d3x-ek/src/sam_ov2640.c')
| -rw-r--r-- | nuttx/configs/sama5d3x-ek/src/sam_ov2640.c | 90 |
1 files changed, 87 insertions, 3 deletions
diff --git a/nuttx/configs/sama5d3x-ek/src/sam_ov2640.c b/nuttx/configs/sama5d3x-ek/src/sam_ov2640.c index 579a6a9e2..8d7b70bcc 100644 --- a/nuttx/configs/sama5d3x-ek/src/sam_ov2640.c +++ b/nuttx/configs/sama5d3x-ek/src/sam_ov2640.c @@ -51,6 +51,9 @@ #include "sam_periphclks.h" #include "sam_lcd.h" #include "sam_pck.h" +#include "sam_pio.h" +#include "chip/sam_pinmap.h" + #include "sama5d3x-ek.h" #ifdef HAVE_CAMERA @@ -58,7 +61,9 @@ /**************************************************************************** * Definitions ****************************************************************************/ -/* Configuration ************************************************************/ +/* Typical OV2640 XVCLK is 24MHz */ + +#define OV2640_FREQUENCY 24000000 /**************************************************************************** * Private Data @@ -97,11 +102,57 @@ static inline FAR struct fb_vtable_s *ov2640_lcd_initialize(void) /**************************************************************************** * Name: ov2640_camera_initialize + * + * Description: + * Initialize the OV2640 camera in the correct mode of operation + * + * OV2640 Camera Interface + * + * SAMA5D3x PIN SAMA5D3x-EK OV2640 + * PIO PER SIGNAL ISI Socket J11 + * ---- --- ------------- --- ------------ ---------------------------------------- + * --- 1 VDDISI --- + * --- 2 GND --- + * --- 3 VDDISI --- + * --- 4 GND --- + * PE28 ? ? 5 ZB_SLPTR ??? + * PE29 ? ? 6 ZB_RST C6 RESETB Reset mode (?) + * PC27 B TWI1_CK 7 TWCK1 C2 SIO_C SCCB serial interface clock input + * PC26 B TWI1_D 8 TWD1 C1 SIO_D SCCB serial interface data I/O + * --- 9 GND --- + * PD31 B PCK1 (ISI_MCK) 10 ISI_MCK C4 XVCLK System clock input (?) + * --- 11 GND --- + * PA30 C ISI_VSYNC 12 ISI_VSYNC D2 VSYNC Vertical synchronization + * --- 13 GND --- + * PA31 C ISI_HSYNC 14 ISI_HSYNC C3 HREF Horizontal reference output (?) + * --- 15 GND --- + * PC30 C ISI_PCK 16 ISI_PCK E3 PCLK Pixel clock output + * --- 17 GND --- + * PA16 C ISI_D0 18 ISI_D0 E2 Y0 Video port output bit[0] + * PA17 C ISI_D1 19 ISI_D1 E1 Y1 Video port output bit[1] + * PA18 C ISI_D2 20 ISI_D2 F3 Y2 Video port output bit[2] + * PA19 C ISI_D3 21 ISI_D3 G3 Y3 Video port output bit[3] + * PA20 C ISI_D4 22 ISI_D4 F4 Y4 Video port output bit[4] + * PA21 C ISI_D5 23 ISI_D5 G4 Y5 Video port output bit[5] + * PA22 C ISI_D6 24 ISI_D6 E5 Y6 Video port output bit[6] + * PA23 C ISI_D7 25 ISI_D7 G5 Y7 Video port output bit[7] + * PC29 C ISI_D8 26 ISI_D8 F5 Y8 Video port output bit[8] + * PC28 C ISI_D9 27 ISI_D9 G6 Y9 Video port output bit[9] + * PC27 C ISI_D10 28 ISI_D10 --- + * PC26 C ISI_D11 29 ISI_D11 --- + * --- 30 GND --- + * + * ??? ?? A2 EXPST_B Snapshot exposure start trigger + * ??? ?? A6 STROBE Flash control output + * ??? ?? B2 FREX Snapshot trigger + * ??? ?? B6 PWDN Power-down mode enable + * ****************************************************************************/ static inline int ov2640_camera_initialize(void) { FAR struct i2c_dev_s *i2c; + uint32_t actual; int ret; /* Get the I2C driver that interfaces with the camers (OV2640_BUS)*/ @@ -109,7 +160,7 @@ static inline int ov2640_camera_initialize(void) i2c = up_i2cinitialize(OV2640_BUS); if (!i2c) { - fdbg("ERROR: Failed to initialize TWI%d\n", OV2640_BUS); + gdbg("ERROR: Failed to initialize TWI%d\n", OV2640_BUS); return EXIT_FAILURE; } @@ -117,6 +168,39 @@ static inline int ov2640_camera_initialize(void) sam_isi_enableclk(); + /* Configure OV2640 pins + * + * ISI: + * - HSYNC, VSYNC, PCK + * - 8 data bits for 8-bit color + * PCK + * - PCK1 provides OV2640 system clock + */ + + sam_configpio(PIO_ISI_HSYNC); + sam_configpio(PIO_ISI_VSYNC); + sam_configpio(PIO_ISI_PCK); + + sam_configpio(PIO_ISI_D0); + sam_configpio(PIO_ISI_D1); + sam_configpio(PIO_ISI_D2); + sam_configpio(PIO_ISI_D3); + sam_configpio(PIO_ISI_D4); + sam_configpio(PIO_ISI_D5); + sam_configpio(PIO_ISI_D6); + sam_configpio(PIO_ISI_D7); + + sam_configpio(PIO_PMC_PCK1); + + /* Configure and enable the PCK1 output */ + + actual = sam_pck_configure(PCK1, OV2640_FREQUENCY); + gvdbg("Desired PCK1 frequency: %ld Actual: %ld\n", + (long)OV2640_FREQUENCY, (long)actual); + + sam_pck_enable(PCK1, true); + + /* Configure the ISI peripheral */ #warning Missing Logic /* Initialize the OV2640 camera */ @@ -124,7 +208,7 @@ static inline int ov2640_camera_initialize(void) ret = ov2640_initialize(i2c); if (ret < 0) { - fdbg("ERROR: Failed to initialize the OV2640: %d\n", ret); + gdbg("ERROR: Failed to initialize the OV2640: %d\n", ret); return EXIT_FAILURE; } |