Improved OSD & displayPort initialisation. Allowed nested screen grabbing

src/main/drivers/max7456.c

@@ -37,6 +37,122 @@
 #include "max7456.h"
 #include "max7456_symbols.h"
 
+
+
+//MAX7456 opcodes
+#define DMM_REG   0x04
+#define DMAH_REG  0x05
+#define DMAL_REG  0x06
+#define DMDI_REG  0x07
+#define VM0_REG   0x00
+#define VM1_REG   0x01
+
+// video mode register 0 bits
+#define VIDEO_BUFFER_DISABLE        0x01
+#define MAX7456_RESET               0x02
+#define VERTICAL_SYNC_NEXT_VSYNC    0x04
+#define OSD_ENABLE                  0x08
+#define SYNC_MODE_AUTO              0x00
+#define SYNC_MODE_INTERNAL          0x30
+#define SYNC_MODE_EXTERNAL          0x20
+#define VIDEO_MODE_PAL              0x40
+#define VIDEO_MODE_NTSC             0x00
+
+// video mode register 1 bits
+
+
+// duty cycle is on_off
+#define BLINK_DUTY_CYCLE_50_50 0x00
+#define BLINK_DUTY_CYCLE_33_66 0x01
+#define BLINK_DUTY_CYCLE_25_75 0x02
+#define BLINK_DUTY_CYCLE_75_25 0x03
+
+// blinking time
+#define BLINK_TIME_0 0x00
+#define BLINK_TIME_1 0x04
+#define BLINK_TIME_2 0x08
+#define BLINK_TIME_3 0x0C
+
+// background mode brightness (percent)
+#define BACKGROUND_BRIGHTNESS_0 0x00
+#define BACKGROUND_BRIGHTNESS_7 0x01
+#define BACKGROUND_BRIGHTNESS_14 0x02
+#define BACKGROUND_BRIGHTNESS_21 0x03
+#define BACKGROUND_BRIGHTNESS_28 0x04
+#define BACKGROUND_BRIGHTNESS_35 0x05
+#define BACKGROUND_BRIGHTNESS_42 0x06
+#define BACKGROUND_BRIGHTNESS_49 0x07
+
+#define BACKGROUND_MODE_GRAY 0x40
+
+//MAX7456 commands
+#define CLEAR_DISPLAY 0x04
+#define CLEAR_DISPLAY_VERT 0x06
+#define END_STRING 0xff
+
+
+#define MAX7456ADD_VM0          0x00  //0b0011100// 00 // 00             ,0011100
+#define MAX7456ADD_VM1          0x01
+#define MAX7456ADD_HOS          0x02
+#define MAX7456ADD_VOS          0x03
+#define MAX7456ADD_DMM          0x04
+#define MAX7456ADD_DMAH         0x05
+#define MAX7456ADD_DMAL         0x06
+#define MAX7456ADD_DMDI         0x07
+#define MAX7456ADD_CMM          0x08
+#define MAX7456ADD_CMAH         0x09
+#define MAX7456ADD_CMAL         0x0a
+#define MAX7456ADD_CMDI         0x0b
+#define MAX7456ADD_OSDM         0x0c
+#define MAX7456ADD_RB0          0x10
+#define MAX7456ADD_RB1          0x11
+#define MAX7456ADD_RB2          0x12
+#define MAX7456ADD_RB3          0x13
+#define MAX7456ADD_RB4          0x14
+#define MAX7456ADD_RB5          0x15
+#define MAX7456ADD_RB6          0x16
+#define MAX7456ADD_RB7          0x17
+#define MAX7456ADD_RB8          0x18
+#define MAX7456ADD_RB9          0x19
+#define MAX7456ADD_RB10         0x1a
+#define MAX7456ADD_RB11         0x1b
+#define MAX7456ADD_RB12         0x1c
+#define MAX7456ADD_RB13         0x1d
+#define MAX7456ADD_RB14         0x1e
+#define MAX7456ADD_RB15         0x1f
+#define MAX7456ADD_OSDBL        0x6c
+#define MAX7456ADD_STAT         0xA0
+
+#define NVM_RAM_SIZE            54
+#define WRITE_NVR               0xA0
+#define STATUS_REG_NVR_BUSY     0x20
+
+/** Line multiples, for convenience & one less op at runtime **/
+#define LINE      30
+#define LINE01    0
+#define LINE02    30
+#define LINE03    60
+#define LINE04    90
+#define LINE05    120
+#define LINE06    150
+#define LINE07    180
+#define LINE08    210
+#define LINE09    240
+#define LINE10    270
+#define LINE11    300
+#define LINE12    330
+#define LINE13    360
+#define LINE14    390
+#define LINE15    420
+#define LINE16    450
+
+
+
+
+
+
+
+
 //on shared SPI buss we want to change clock for OSD chip and restore for other devices
 #ifdef MAX7456_SPI_CLK
     #define ENABLE_MAX7456        {spiSetDivisor(MAX7456_SPI_INSTANCE, MAX7456_SPI_CLK);IOLo(max7456CsPin);}