add FT5x06 multi-touch controller

[kmatch98]

This generalizes the library to accommodate FT5x06 controller that can accept 10 point multitouch.

Note: In order to get proper scaling to the 800x480 display panel, I required adding a _SCALE_FACTOR parameter. As an extension, the scaling could be automated using a calibration routine.

I added type notations to resolve #21.

In the future, consider relaxing the vend_id parameter. From my reading of the register descriptions in the FT5x06 application note, I conclude that this is the vendor ID of the touch panel rather than the chip vendor.

Testing

• FT6206: I verified on the Adafruit 2.8" Cap touch TFT.
• FT5406: I verified on controller FT5406 from 7" touch controller (EP0700MLM0, suspected from EDTC) - images below.

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FT5x06 Testing Details

Images of panel used to test the FT5x06 updates:

For reference, below is the register dump from FT5406 touch panel used in testing:

	$00 => 00 device mode
	$01 => 00 gesture ID
	$02 => 00 TD status, number of touch points
	$03 => 44 bit 7-6 1st event flag, 3-0 1st touch x-position 11-8 bit
	$04 => B1 1st touch x-position 7-0 bits
	$05 => 01 bit 7-4, 1st touch ID, 3-0 1st touch y-position  11-8 bit
	$06 => BC 1st touch y-position 7-0 bits
	$07 => 00
	$08 => 00
	$09 => FF 2nd
	$0A => FF
	$0B => FF
	$0C => FF
	$0D => 00
	$0E => 00
	$0F => FF 3rd
	$10 => FF
	$11 => FF
	$12 => FF
	$13 => 00
	$14 => 00
	$15 => FF 4th
	$16 => FF
	$17 => FF
	$18 => FF
	$19 => 00
	$1A => 00
	$1B => FF 5th
	$1C => FF
	$1D => FF
	$1E => FF
	$1F => 00
	$20 => 00
	$21 => FF 6th
	$22 => FF
	$23 => FF
	$24 => FF
	$25 => 00
	$26 => 00
	$27 => FF 7th
	$28 => FF
	$29 => FF
	$2A => FF
	$2B => 00
	$2C => 00
	$2D => FF 8th
	$2E => FF
	$2F => FF
	$30 => FF
	$31 => 00
	$32 => 00
	$33 => FF 9th
	$34 => FF
	$35 => FF
	$36 => FF
	$37 => 00
	$38 => 00
	$39 => FF 10th
	$3A => FF
	$3B => FF
	$3C => FF
	$3D => 00
	$3E => 00
	$3F => 00
	$40 => 00
	$41 => 00
	$42 => 00
	$43 => 00
	$44 => 00
	$45 => 00
	$46 => 00
	$47 => 00
	$48 => 00
	$49 => 00
	$4A => 00
	$4B => 00
	$4C => 00
	$4D => 00
	$4E => 00
	$4F => 00
	$50 => 00
	$51 => 00
	$52 => 00
	$53 => 00
	$54 => 00
	$55 => 00
	$56 => 00
	$57 => 00
	$58 => 00
	$59 => 00
	$5A => 00
	$5B => 00
	$5C => 00
	$5D => 00
	$5E => 00
	$5F => 00
	$60 => 00
	$61 => 00
	$62 => 00
	$63 => 00
	$64 => 00
	$65 => 00
	$66 => 00
	$67 => 00
	$68 => 00
	$69 => 00
	$6A => 00
	$6B => 00
	$6C => 00
	$6D => 00
	$6E => 00
	$6F => 00
	$70 => 00
	$71 => 00
	$72 => 00
	$73 => 00
	$74 => 00
	$75 => 00
	$76 => 00
	$77 => 00
	$78 => 00
	$79 => 00
	$7A => 00
	$7B => 00
	$7C => 00
	$7D => 00
	$7E => 00
	$7F => 00
	$80 => 19 start of touch detection parameters
	$81 => 3C
	$82 => 75
	$83 => 01
	$84 => 01
	$85 => A0
	$86 => 01
	$87 => C8
	$88 => 0A
	$89 => 28
	$8A => EB
	$8B => 50
	$8C => DB
	$8D => AE
	$8E => FD
	$8F => 7A
	$90 => F7
	$91 => FD
	$92 => AB
	$93 => E8
	$94 => C8
	$95 => EA
	$96 => AC
	$97 => 98
	$98 => 39
	$99 => 85
	$9A => B7
	$9B => AC
	$9C => 79
	$9D => B7
	$9E => 6B
	$9F => 9B
	$A0 => FF
	$A1 => 30 library version high byte
	$A2 => 03 library version low byte
	$A3 => 55 chip vendor ID
	$A4 => 01
	$A5 => 01
	$A6 => 01 firmware ID
	$A7 => 01
	$A8 => 42 Capacitive touch panel maker vendor ID
	$A9 => 00
	$AA => 00
	$AB => 7F
	$AC => 1A
	$AD => 0C
	$AE => 96
	$AF => 01
	$B0 => 08
	$B1 => 00
	$B2 => E6
	$B3 => 64
	$B4 => 32
	$B5 => F5
	$B6 => C8
	$B7 => EB
	$B8 => FB
	$B9 => 1D
	$BA => AB
	$BB => A7
	$BC => 8D
	$BD => F7
	$BE => AF
	$BF => 1B
	$C0 => 00
	$C1 => 00
	$C2 => 00
	$C3 => 00
	$C4 => 00
	$C5 => 00
	$C6 => 00
	$C7 => 00
	$C8 => 00
	$C9 => 00
	$CA => 00
	$CB => 00
	$CC => 00
	$CD => 00
	$CE => 00
	$CF => 00
	$D0 => 00
	$D1 => 00
	$D2 => 00
	$D3 => 00
	$D4 => 00
	$D5 => 00
	$D6 => 00
	$D7 => 00
	$D8 => 00
	$D9 => 00
	$DA => 00
	$DB => 00
	$DC => 00
	$DD => 00
	$DE => 00
	$DF => 00
	$E0 => 00
	$E1 => 00
	$E2 => 00
	$E3 => 00
	$E4 => 00
	$E5 => 00
	$E6 => 00
	$E7 => 00
	$E8 => 00
	$E9 => 00
	$EA => 00
	$EB => 00
	$EC => 00
	$ED => 00
	$EE => 00
	$EF => 00
	$F0 => 00
	$F1 => 00
	$F2 => 00
	$F3 => 00
	$F4 => 00
	$F5 => 00
	$F6 => 00
	$F7 => 00
	$F8 => 00
	$F9 => 00
	$FA => 00
	$FB => 00
	$FC => 01
	$FD => 00
	$FE => 00
	$FF => 00

[ladyada]

yay thank you :)