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Enable de-ghosting for RGB/LED matrix on all ISSI LED drivers (qmk#14508
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)

* Initial work for de-ghost enable

* Dumb mistake with the redefine

* Added Copywrite stuff on source files

* Fixed whitespace errors

* Added support for all ISSI LED drivers

* Updated docs for support for ISSI LED driver pull-up pull-down

* Applied clang format

* Added 'boolean' flag to enable de-ghosting for the is31fl3731 IC

* Fixed some of the grammer in the docs

* Fixed comment placement and grammer of comment

* Fixed whitespace errors from lint

Co-authored-by: donicrosby <[email protected]>
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2 people authored and ptrxyz committed Nov 6, 2021
1 parent ed2e6ce commit 0192e3f
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47 changes: 38 additions & 9 deletions docs/feature_rgb_matrix.md
Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@ You can use between 1 and 4 IS31FL3731 IC's. Do not specify `DRIVER_ADDR_<N>` de
|----------|-------------|---------|
| `ISSI_TIMEOUT` | (Optional) How long to wait for i2c messages, in milliseconds | 100 |
| `ISSI_PERSISTENCE` | (Optional) Retry failed messages this many times | 0 |
| `ISSI_3731_DEGHOST` | (Optional) Set this define to enable de-ghosting by halving Vcc during blanking time | |
| `DRIVER_COUNT` | (Required) How many RGB driver IC's are present | |
| `DRIVER_LED_TOTAL` | (Required) How many RGB lights are present across all drivers | |
| `DRIVER_ADDR_1` | (Required) Address for the first RGB driver | |
Expand Down Expand Up @@ -85,6 +86,8 @@ You can use between 1 and 4 IS31FL3733 IC's. Do not specify `DRIVER_ADDR_<N>` de
| `ISSI_TIMEOUT` | (Optional) How long to wait for i2c messages, in milliseconds | 100 |
| `ISSI_PERSISTENCE` | (Optional) Retry failed messages this many times | 0 |
| `ISSI_PWM_FREQUENCY` | (Optional) PWM Frequency Setting - IS31FL3733B only | 0 |
| `ISSI_SWPULLUP` | (Optional) Set the value of the SWx lines on-chip de-ghosting resistors | PUR_0R (Disabled) |
| `ISSI_CSPULLUP` | (Optional) Set the value of the CSx lines on-chip de-ghosting resistors | PUR_0R (Disabled) |
| `DRIVER_COUNT` | (Required) How many RGB driver IC's are present | |
| `DRIVER_LED_TOTAL` | (Required) How many RGB lights are present across all drivers | |
| `DRIVER_ADDR_1` | (Required) Address for the first RGB driver | |
Expand All @@ -96,6 +99,18 @@ You can use between 1 and 4 IS31FL3733 IC's. Do not specify `DRIVER_ADDR_<N>` de
| `DRIVER_SYNC_3` | (Optional) Sync configuration for the third RGB driver | 0 |
| `DRIVER_SYNC_4` | (Optional) Sync configuration for the fourth RGB driver | 0 |

The IS31FL3733 IC's have on-chip resistors that can be enabled to allow for de-ghosting of the RGB matrix. By default these resistors are not enabled (`ISSI_SWPULLUP`/`ISSI_CSPULLUP` are given the value of`PUR_0R`), the values that can be set to enable de-ghosting are as follows:

| `ISSI_SWPULLUP/ISSI_CSPULLUP` | Description |
|----------------------|-------------|
| `PUR_0R` | (default) Do not use the on-chip resistors/enable de-ghosting |
| `PUR_05KR` | The 0.5k Ohm resistor used during blanking period (t_NOL) |
| `PUR_3KR` | The 3k Ohm resistor used at all times |
| `PUR_4KR` | The 4k Ohm resistor used at all times |
| `PUR_8KR` | The 8k Ohm resistor used at all times |
| `PUR_16KR` | The 16k Ohm resistor used at all times |
| `PUR_32KR` | The 32k Ohm resistor used during blanking period (t_NOL) |

Here is an example using 2 drivers.

```c
Expand Down Expand Up @@ -156,11 +171,25 @@ Configure the hardware via your `config.h`:
|----------|-------------|---------|
| `ISSI_TIMEOUT` | (Optional) How long to wait for i2c messages, in milliseconds | 100 |
| `ISSI_PERSISTENCE` | (Optional) Retry failed messages this many times | 0 |
| `ISSI_SWPULLUP` | (Optional) Set the value of the SWx lines on-chip de-ghosting resistors | PUR_0R (Disabled) |
| `ISSI_CSPULLUP` | (Optional) Set the value of the CSx lines on-chip de-ghosting resistors | PUR_0R (Disabled) |
| `DRIVER_COUNT` | (Required) How many RGB driver IC's are present | |
| `DRIVER_LED_TOTAL` | (Required) How many RGB lights are present across all drivers | |
| `DRIVER_ADDR_1` | (Required) Address for the first RGB driver | |
| `DRIVER_ADDR_2` | (Optional) Address for the second RGB driver | |

The IS31FL3737 IC's have on-chip resistors that can be enabled to allow for de-ghosting of the RGB matrix. By default these resistors are not enabled (`ISSI_SWPULLUP`/`ISSI_CSPULLUP` are given the value of`PUR_0R`), the values that can be set to enable de-ghosting are as follows:

| `ISSI_SWPULLUP/ISSI_CSPULLUP` | Description |
|----------------------|-------------|
| `PUR_0R` | (default) Do not use the on-chip resistors/enable de-ghosting |
| `PUR_05KR` | The 0.5k Ohm resistor used during blanking period (t_NOL) |
| `PUR_1KR` | The 1k Ohm resistor used during blanking period (t_NOL) |
| `PUR_2KR` | The 2k Ohm resistor used during blanking period (t_NOL) |
| `PUR_4KR` | The 4k Ohm resistor used during blanking period (t_NOL) |
| `PUR_8KR` | The 8k Ohm resistor during blanking period (t_NOL) |
| `PUR_16KR` | The 16k Ohm resistor during blanking period (t_NOL) |
| `PUR_32KR` | The 32k Ohm resistor used during blanking period (t_NOL) |

Here is an example using 2 drivers.

Expand All @@ -184,7 +213,7 @@ Here is an example using 2 drivers.
```
!> Note the parentheses, this is so when `DRIVER_LED_TOTAL` is used in code and expanded, the values are added together before any additional math is applied to them. As an example, `rand() % (DRIVER_1_LED_TOTAL + DRIVER_2_LED_TOTAL)` will give very different results than `rand() % DRIVER_1_LED_TOTAL + DRIVER_2_LED_TOTAL`.
Currently only 2 drivers are supported, but it would be trivial to support all 4 combinations.
Currently only 2 drivers are supported, but it would be trivial to support all 4 combinations.
Define these arrays listing all the LEDs in your `<keyboard>.c`:
Expand Down Expand Up @@ -343,7 +372,7 @@ x = 224 / (NUMBER_OF_COLS - 1) * COL_POSITION
y = 64 / (NUMBER_OF_ROWS - 1) * ROW_POSITION
```

Where NUMBER_OF_COLS, NUMBER_OF_ROWS, COL_POSITION, & ROW_POSITION are all based on the physical layout of your keyboard, not the electrical layout.
Where NUMBER_OF_COLS, NUMBER_OF_ROWS, COL_POSITION, & ROW_POSITION are all based on the physical layout of your keyboard, not the electrical layout.

As mentioned earlier, the center of the keyboard by default is expected to be `{ 112, 32 }`, but this can be changed if you want to more accurately calculate the LED's physical `{ x, y }` positions. Keyboard designers can implement `#define RGB_MATRIX_CENTER { 112, 32 }` in their config.h file with the new center point of the keyboard, or where they want it to be allowing more possibilities for the `{ x, y }` values. Do note that the maximum value for x or y is 255, and the recommended maximum is 224 as this gives animations runoff room before they reset.

Expand Down Expand Up @@ -386,7 +415,7 @@ All RGB keycodes are currently shared with the RGBLIGHT system:

* `RGB_MODE_*` keycodes will generally work, but not all of the modes are currently mapped to the correct effects for the RGB Matrix system.

`RGB_MODE_PLAIN`, `RGB_MODE_BREATHE`, `RGB_MODE_RAINBOW`, and `RGB_MATRIX_SWIRL` are the only ones that are mapped properly. The rest don't have a direct equivalent, and are not mapped.
`RGB_MODE_PLAIN`, `RGB_MODE_BREATHE`, `RGB_MODE_RAINBOW`, and `RGB_MATRIX_SWIRL` are the only ones that are mapped properly. The rest don't have a direct equivalent, and are not mapped.

!> By default, if you have both the [RGB Light](feature_rgblight.md) and the RGB Matrix feature enabled, these keycodes will work for both features, at the same time. You can disable the keycode functionality by defining the `*_DISABLE_KEYCODES` option for the specific feature.

Expand Down Expand Up @@ -423,7 +452,7 @@ enum rgb_matrix_effects {
RGB_MATRIX_JELLYBEAN_RAINDROPS, // Randomly changes a single key's hue and saturation
RGB_MATRIX_HUE_BREATHING, // Hue shifts up a slight ammount at the same time, then shifts back
RGB_MATRIX_HUE_PENDULUM, // Hue shifts up a slight ammount in a wave to the right, then back to the left
RGB_MATRIX_HUE_WAVE, // Hue shifts up a slight ammount and then back down in a wave to the right
RGB_MATRIX_HUE_WAVE, // Hue shifts up a slight ammount and then back down in a wave to the right
RGB_MATRIX_FRACTAL, // Single hue fractal filled keys pulsing horizontally out to edges
#if define(RGB_MATRIX_FRAMEBUFFER_EFFECTS)
RGB_MATRIX_TYPING_HEATMAP, // How hot is your WPM!
Expand Down Expand Up @@ -698,7 +727,7 @@ Where `28` is an unused index from `eeconfig.h`.
### Indicators :id=indicators
If you want to set custom indicators, such as an LED for Caps Lock, or layer indication, you can use the `rgb_matrix_indicators_kb` or `rgb_matrix_indicators_user` function for that:
If you want to set custom indicators, such as an LED for Caps Lock, or layer indication, you can use the `rgb_matrix_indicators_kb` or `rgb_matrix_indicators_user` function for that:
```c
void rgb_matrix_indicators_kb(void) {
rgb_matrix_set_color(index, red, green, blue);
Expand Down Expand Up @@ -753,18 +782,18 @@ This example sets the modifiers to be a specific color based on the layer state.
```c
void rgb_matrix_indicators_advanced_user(uint8_t led_min, uint8_t led_max) {
HSV hsv = {0, 255, 255};
if (layer_state_is(layer_state, 2)) {
hsv = {130, 255, 255};
} else {
hsv = {30, 255, 255};
}
if (hsv.v > rgb_matrix_get_val()) {
hsv.v = rgb_matrix_get_val();
}
RGB rgb = hsv_to_rgb(hsv);
for (uint8_t i = led_min; i <= led_max; i++) {
if (HAS_FLAGS(g_led_config.flags[i], 0x01)) { // 0x01 == LED_FLAG_MODIFIER
rgb_matrix_set_color(i, rgb.r, rgb.g, rgb.b);
Expand All @@ -773,7 +802,7 @@ void rgb_matrix_indicators_advanced_user(uint8_t led_min, uint8_t led_max) {
}
```

If you want to indicate a Host LED status (caps lock, num lock, etc), you can use something like this to light up the caps lock key:
If you want to indicate a Host LED status (caps lock, num lock, etc), you can use something like this to light up the caps lock key:

```c
void rgb_matrix_indicators_advanced_user(uint8_t led_min, uint8_t led_max) {
Expand Down
7 changes: 7 additions & 0 deletions drivers/led/issi/is31fl3731-simple.c
Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
/* Copyright 2017 Jason Williams
* Copyright 2018 Jack Humbert
* Copyright 2019 Clueboard
* Copyright 2021 Doni Crosby
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
Expand Down Expand Up @@ -40,6 +41,9 @@

#define ISSI_REG_PICTUREFRAME 0x01

// Not defined in the datasheet -- See AN for IC
#define ISSI_REG_GHOST_IMAGE_PREVENTION 0xC2 // Set bit 4 to enable de-ghosting

#define ISSI_REG_SHUTDOWN 0x0A
#define ISSI_REG_AUDIOSYNC 0x06

Expand Down Expand Up @@ -144,6 +148,9 @@ void IS31FL3731_init(uint8_t addr) {

// enable software shutdown
IS31FL3731_write_register(addr, ISSI_REG_SHUTDOWN, 0x00);
#ifdef ISSI_3731_DEGHOST // set to enable de-ghosting of the array
IS31FL3731_write_register(addr, ISSI_REG_GHOST_IMAGE_PREVENTION, 0x10);
#endif

// this delay was copied from other drivers, might not be needed
wait_ms(10);
Expand Down
7 changes: 7 additions & 0 deletions drivers/led/issi/is31fl3731.c
Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
/* Copyright 2017 Jason Williams
* Copyright 2018 Jack Humbert
* Copyright 2021 Doni Crosby
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
Expand Down Expand Up @@ -39,6 +40,9 @@

#define ISSI_REG_PICTUREFRAME 0x01

// Not defined in the datasheet -- See AN for IC
#define ISSI_REG_GHOST_IMAGE_PREVENTION 0xC2 // Set bit 4 to enable de-ghosting

#define ISSI_REG_SHUTDOWN 0x0A
#define ISSI_REG_AUDIOSYNC 0x06

Expand Down Expand Up @@ -132,6 +136,9 @@ void IS31FL3731_init(uint8_t addr) {

// enable software shutdown
IS31FL3731_write_register(addr, ISSI_REG_SHUTDOWN, 0x00);
#ifdef ISSI_3731_DEGHOST // set to enable de-ghosting of the array
IS31FL3731_write_register(addr, ISSI_REG_GHOST_IMAGE_PREVENTION, 0x10);
#endif

// this delay was copied from other drivers, might not be needed
wait_ms(10);
Expand Down
11 changes: 11 additions & 0 deletions drivers/led/issi/is31fl3733.c
Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
/* Copyright 2017 Jason Williams
* Copyright 2018 Jack Humbert
* Copyright 2018 Yiancar
* Copyright 2021 Doni Crosby
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
Expand Down Expand Up @@ -58,6 +59,12 @@

#ifndef ISSI_PWM_FREQUENCY
# define ISSI_PWM_FREQUENCY 0b000 // PFS - IS31FL3733B only
#ifndef ISSI_SWPULLUP
# define ISSI_SWPULLUP PUR_0R
#endif

#ifndef ISSI_CSPULLUP
# define ISSI_CSPULLUP PUR_0R
#endif

// Transfer buffer for TWITransmitData()
Expand Down Expand Up @@ -158,6 +165,10 @@ void IS31FL3733_init(uint8_t addr, uint8_t sync) {

// Select PG3
IS31FL3733_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_FUNCTION);
// Set de-ghost pull-up resistors (SWx)
IS31FL3733_write_register(addr, ISSI_REG_SWPULLUP, ISSI_SWPULLUP);
// Set de-ghost pull-down resistors (CSx)
IS31FL3733_write_register(addr, ISSI_REG_CSPULLUP, ISSI_CSPULLUP);
// Set global current to maximum.
IS31FL3733_write_register(addr, ISSI_REG_GLOBALCURRENT, 0xFF);
// Disable software shutdown.
Expand Down
9 changes: 9 additions & 0 deletions drivers/led/issi/is31fl3733.h
Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
/* Copyright 2017 Jason Williams
* Copyright 2018 Jack Humbert
* Copyright 2018 Yiancar
* Copyright 2021 Doni Crosby
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
Expand Down Expand Up @@ -47,6 +48,14 @@ void IS31FL3733_set_led_control_register(uint8_t index, bool red, bool green, bo
void IS31FL3733_update_pwm_buffers(uint8_t addr, uint8_t index);
void IS31FL3733_update_led_control_registers(uint8_t addr, uint8_t index);

#define PUR_0R 0x00 // No PUR resistor
#define PUR_05KR 0x02 // 0.5k Ohm resistor in t_NOL
#define PUR_3KR 0x03 // 3.0k Ohm resistor on all the time
#define PUR_4KR 0x04 // 4.0k Ohm resistor on all the time
#define PUR_8KR 0x05 // 8.0k Ohm resistor on all the time
#define PUR_16KR 0x06 // 16k Ohm resistor on all the time
#define PUR_32KR 0x07 // 32k Ohm resistor in t_NOL

#define A_1 0x00
#define A_2 0x01
#define A_3 0x02
Expand Down
13 changes: 13 additions & 0 deletions drivers/led/issi/is31fl3736.c
Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
/* Copyright 2018 Jason Williams (Wilba)
* Copyright 2021 Doni Crosby
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
Expand Down Expand Up @@ -54,6 +55,14 @@
# define ISSI_PERSISTENCE 0
#endif

#ifndef ISSI_SWPULLUP
# define ISSI_SWPULLUP PUR_0R
#endif

#ifndef ISSI_CSPULLUP
# define ISSI_CSPULLUP PUR_0R
#endif

// Transfer buffer for TWITransmitData()
uint8_t g_twi_transfer_buffer[20];

Expand Down Expand Up @@ -140,6 +149,10 @@ void IS31FL3736_init(uint8_t addr) {

// Select PG3
IS31FL3736_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_FUNCTION);
// Set de-ghost pull-up resistors (SWx)
IS31FL3736_write_register(addr, ISSI_REG_SWPULLUP, ISSI_SWPULLUP);
// Set de-ghost pull-down resistors (CSx)
IS31FL3736_write_register(addr, ISSI_REG_CSPULLUP, ISSI_CSPULLUP);
// Set global current to maximum.
IS31FL3736_write_register(addr, ISSI_REG_GLOBALCURRENT, 0xFF);
// Disable software shutdown.
Expand Down
10 changes: 10 additions & 0 deletions drivers/led/issi/is31fl3736.h
Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
/* Copyright 2018 Jason Williams (Wilba)
* Copyright 2021 Doni Crosby
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
Expand Down Expand Up @@ -60,6 +61,15 @@ void IS31FL3736_mono_set_led_control_register(uint8_t index, bool enabled);
void IS31FL3736_update_pwm_buffers(uint8_t addr1, uint8_t addr2);
void IS31FL3736_update_led_control_registers(uint8_t addr1, uint8_t addr2);

#define PUR_0R 0x00 // No PUR resistor
#define PUR_05KR 0x01 // 0.5k Ohm resistor
#define PUR_1KR 0x02 // 1.0k Ohm resistor
#define PUR_2KR 0x03 // 2.0k Ohm resistor
#define PUR_4KR 0x04 // 4.0k Ohm resistor
#define PUR_8KR 0x05 // 8.0k Ohm resistor
#define PUR_16KR 0x06 // 16k Ohm resistor
#define PUR_32KR 0x07 // 32k Ohm resistor

#define A_1 0x00
#define A_2 0x02
#define A_3 0x04
Expand Down
13 changes: 13 additions & 0 deletions drivers/led/issi/is31fl3737.c
Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
/* Copyright 2017 Jason Williams
* Copyright 2018 Jack Humbert
* Copyright 2018 Yiancar
* Copyright 2021 Doni Crosby
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
Expand Down Expand Up @@ -56,6 +57,14 @@
# define ISSI_PERSISTENCE 0
#endif

#ifndef ISSI_SWPULLUP
# define ISSI_SWPULLUP PUR_0R
#endif

#ifndef ISSI_CSPULLUP
# define ISSI_CSPULLUP PUR_0R
#endif

// Transfer buffer for TWITransmitData()
uint8_t g_twi_transfer_buffer[20];

Expand Down Expand Up @@ -143,6 +152,10 @@ void IS31FL3737_init(uint8_t addr) {

// Select PG3
IS31FL3737_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_FUNCTION);
// Set de-ghost pull-up resistors (SWx)
IS31FL3737_write_register(addr, ISSI_REG_SWPULLUP, ISSI_SWPULLUP);
// Set de-ghost pull-down resistors (CSx)
IS31FL3737_write_register(addr, ISSI_REG_CSPULLUP, ISSI_CSPULLUP);
// Set global current to maximum.
IS31FL3737_write_register(addr, ISSI_REG_GLOBALCURRENT, 0xFF);
// Disable software shutdown.
Expand Down
10 changes: 10 additions & 0 deletions drivers/led/issi/is31fl3737.h
Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
/* Copyright 2017 Jason Williams
* Copyright 2018 Jack Humbert
* Copyright 2018 Yiancar
* Copyright 2021 Doni Crosby
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
Expand Down Expand Up @@ -47,6 +48,15 @@ void IS31FL3737_set_led_control_register(uint8_t index, bool red, bool green, bo
void IS31FL3737_update_pwm_buffers(uint8_t addr1, uint8_t addr2);
void IS31FL3737_update_led_control_registers(uint8_t addr1, uint8_t addr2);

#define PUR_0R 0x00 // No PUR resistor
#define PUR_05KR 0x01 // 0.5k Ohm resistor in t_NOL
#define PUR_1KR 0x02 // 1.0k Ohm resistor in t_NOL
#define PUR_2KR 0x03 // 2.0k Ohm resistor in t_NOL
#define PUR_4KR 0x04 // 4.0k Ohm resistor in t_NOL
#define PUR_8KR 0x05 // 8.0k Ohm resistor in t_NOL
#define PUR_16KR 0x06 // 16k Ohm resistor in t_NOL
#define PUR_32KR 0x07 // 32k Ohm resistor in t_NOL

#define A_1 0x00
#define A_2 0x01
#define A_3 0x02
Expand Down
10 changes: 9 additions & 1 deletion drivers/led/issi/is31fl3741.c
Original file line number Diff line number Diff line change
Expand Up @@ -61,6 +61,14 @@
# define ISSI_PERSISTENCE 0
#endif

#ifndef ISSI_SWPULLUP
# define ISSI_SWPULLUP PUR_32KR
#endif

#ifndef ISSI_CSPULLUP
# define ISSI_CSPULLUP PUR_32KR
#endif

#define ISSI_MAX_LEDS 351

// Transfer buffer for TWITransmitData()
Expand Down Expand Up @@ -157,7 +165,7 @@ void IS31FL3741_init(uint8_t addr) {
// Set Golbal Current Control Register
IS31FL3741_write_register(addr, ISSI_REG_GLOBALCURRENT, 0xFF);
// Set Pull up & Down for SWx CSy
IS31FL3741_write_register(addr, ISSI_REG_PULLDOWNUP, 0x77);
IS31FL3741_write_register(addr, ISSI_REG_PULLDOWNUP, ((ISSI_CSPULLUP << 4) | ISSI_SWPULLUP));

// IS31FL3741_update_led_scaling_registers(addr, 0xFF, 0xFF, 0xFF);

Expand Down
9 changes: 9 additions & 0 deletions drivers/led/issi/is31fl3741.h
Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,15 @@ void IS31FL3741_set_scaling_registers(const is31_led *pled, uint8_t red, uint8_t

void IS31FL3741_set_pwm_buffer(const is31_led *pled, uint8_t red, uint8_t green, uint8_t blue);

#define PUR_0R 0x00 // No PUR resistor
#define PUR_05KR 0x01 // 0.5k Ohm resistor
#define PUR_1KR 0x02 // 1.0k Ohm resistor
#define PUR_2KR 0x03 // 2.0k Ohm resistor
#define PUR_4KR 0x04 // 4.0k Ohm resistor
#define PUR_8KR 0x05 // 8.0k Ohm resistor
#define PUR_16KR 0x06 // 16k Ohm resistor
#define PUR_32KR 0x07 // 32k Ohm resistor

#define CS1_SW1 0x00
#define CS2_SW1 0x01
#define CS3_SW1 0x02
Expand Down

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