Enable de-ghosting for RGB/LED matrix on all ISSI LED drivers

docs/feature_rgb_matrix.md

@@ -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 | |
@@ -82,6 +83,8 @@ 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_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 | |
@@ -93,6 +96,18 @@ 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 the times |
+| `PUR_4KR` | The 4k Ohm resistor used at all the times |
+| `PUR_8KR` | The 8k Ohm resistor used at all the times |
+| `PUR_16KR` | The 16k Ohm resistor used at all the times |
+| `PUR_32KR` | The 32k Ohm resistor used during blanking period (t_NOL) |
+
 Here is an example using 2 drivers.
 
 ```c
@@ -153,11 +168,25 @@ 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.
 

drivers/led/issi/is31fl3731-simple.c

@@ -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
@@ -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
 
@@ -144,6 +148,10 @@ void IS31FL3731_init(uint8_t addr) {
 
     // enable software shutdown
     IS31FL3731_write_register(addr, ISSI_REG_SHUTDOWN, 0x00);
+#ifdef ISSI_3731_DEGHOST
+    // set enable or leave off 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);

drivers/led/issi/is31fl3731.c

@@ -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
@@ -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
 
@@ -132,6 +136,10 @@ void IS31FL3731_init(uint8_t addr) {
 
     // enable software shutdown
     IS31FL3731_write_register(addr, ISSI_REG_SHUTDOWN, 0x00);
+#ifdef ISSI_3731_DEGHOST
+    // set enable or leave off 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);

drivers/led/issi/is31fl3733.c

@@ -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
@@ -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];
 
@@ -154,6 +163,10 @@ 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.

drivers/led/issi/is31fl3733.h

@@ -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
@@ -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

drivers/led/issi/is31fl3736.c

@@ -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
@@ -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];
 
@@ -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.

drivers/led/issi/is31fl3736.h

@@ -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
@@ -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

drivers/led/issi/is31fl3737.c

@@ -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
@@ -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];
 
@@ -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.

drivers/led/issi/is31fl3737.h

@@ -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
@@ -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

drivers/led/issi/is31fl3741.c

@@ -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()
@@ -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);
 

drivers/led/issi/is31fl3741.h

@@ -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