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IS31FL3733 driver for LED Matrix (#15088)
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/* Copyright 2017 Jason Williams | ||
* Copyright 2018 Jack Humbert | ||
* Copyright 2018 Yiancar | ||
* Copyright 2021 Doni Crosby | ||
* Copyright 2021 Leo Deng | ||
* | ||
* 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 | ||
* the Free Software Foundation, either version 2 of the License, or | ||
* (at your option) any later version. | ||
* | ||
* This program is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
* GNU General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
*/ | ||
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#include "is31fl3733-simple.h" | ||
#include "i2c_master.h" | ||
#include "wait.h" | ||
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// This is a 7-bit address, that gets left-shifted and bit 0 | ||
// set to 0 for write, 1 for read (as per I2C protocol) | ||
// The address will vary depending on your wiring: | ||
// 00 <-> GND | ||
// 01 <-> SCL | ||
// 10 <-> SDA | ||
// 11 <-> VCC | ||
// ADDR1 represents A1:A0 of the 7-bit address. | ||
// ADDR2 represents A3:A2 of the 7-bit address. | ||
// The result is: 0b101(ADDR2)(ADDR1) | ||
#define ISSI_ADDR_DEFAULT 0x50 | ||
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#define ISSI_COMMANDREGISTER 0xFD | ||
#define ISSI_COMMANDREGISTER_WRITELOCK 0xFE | ||
#define ISSI_INTERRUPTMASKREGISTER 0xF0 | ||
#define ISSI_INTERRUPTSTATUSREGISTER 0xF1 | ||
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#define ISSI_PAGE_LEDCONTROL 0x00 // PG0 | ||
#define ISSI_PAGE_PWM 0x01 // PG1 | ||
#define ISSI_PAGE_AUTOBREATH 0x02 // PG2 | ||
#define ISSI_PAGE_FUNCTION 0x03 // PG3 | ||
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#define ISSI_REG_CONFIGURATION 0x00 // PG3 | ||
#define ISSI_REG_GLOBALCURRENT 0x01 // PG3 | ||
#define ISSI_REG_RESET 0x11 // PG3 | ||
#define ISSI_REG_SWPULLUP 0x0F // PG3 | ||
#define ISSI_REG_CSPULLUP 0x10 // PG3 | ||
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#ifndef ISSI_TIMEOUT | ||
# define ISSI_TIMEOUT 100 | ||
#endif | ||
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#ifndef ISSI_PERSISTENCE | ||
# define ISSI_PERSISTENCE 0 | ||
#endif | ||
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#ifndef ISSI_PWM_FREQUENCY | ||
# define ISSI_PWM_FREQUENCY 0b000 // PFS - IS31FL3733B only | ||
#endif | ||
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#ifndef ISSI_SWPULLUP | ||
# define ISSI_SWPULLUP PUR_0R | ||
#endif | ||
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#ifndef ISSI_CSPULLUP | ||
# define ISSI_CSPULLUP PUR_0R | ||
#endif | ||
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// Transfer buffer for TWITransmitData() | ||
uint8_t g_twi_transfer_buffer[20]; | ||
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// These buffers match the IS31FL3733 PWM registers. | ||
// The control buffers match the PG0 LED On/Off registers. | ||
// Storing them like this is optimal for I2C transfers to the registers. | ||
// We could optimize this and take out the unused registers from these | ||
// buffers and the transfers in IS31FL3733_write_pwm_buffer() but it's | ||
// probably not worth the extra complexity. | ||
uint8_t g_pwm_buffer[LED_DRIVER_COUNT][192]; | ||
bool g_pwm_buffer_update_required[LED_DRIVER_COUNT] = {false}; | ||
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/* There's probably a better way to init this... */ | ||
#if LED_DRIVER_COUNT == 1 | ||
uint8_t g_led_control_registers[LED_DRIVER_COUNT][24] = {{0}}; | ||
#elif LED_DRIVER_COUNT == 2 | ||
uint8_t g_led_control_registers[LED_DRIVER_COUNT][24] = {{0}, {0}}; | ||
#elif LED_DRIVER_COUNT == 3 | ||
uint8_t g_led_control_registers[LED_DRIVER_COUNT][24] = {{0}, {0}, {0}}; | ||
#elif LED_DRIVER_COUNT == 4 | ||
uint8_t g_led_control_registers[LED_DRIVER_COUNT][24] = {{0}, {0}, {0}, {0}}; | ||
#endif | ||
bool g_led_control_registers_update_required[LED_DRIVER_COUNT] = {false}; | ||
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bool IS31FL3733_write_register(uint8_t addr, uint8_t reg, uint8_t data) { | ||
// If the transaction fails function returns false. | ||
g_twi_transfer_buffer[0] = reg; | ||
g_twi_transfer_buffer[1] = data; | ||
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#if ISSI_PERSISTENCE > 0 | ||
for (uint8_t i = 0; i < ISSI_PERSISTENCE; i++) { | ||
if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, ISSI_TIMEOUT) != 0) { | ||
return false; | ||
} | ||
} | ||
#else | ||
if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, ISSI_TIMEOUT) != 0) { | ||
return false; | ||
} | ||
#endif | ||
return true; | ||
} | ||
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bool IS31FL3733_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) { | ||
// Assumes PG1 is already selected. | ||
// If any of the transactions fails function returns false. | ||
// Transmit PWM registers in 12 transfers of 16 bytes. | ||
// g_twi_transfer_buffer[] is 20 bytes | ||
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// Iterate over the pwm_buffer contents at 16 byte intervals. | ||
for (int i = 0; i < 192; i += 16) { | ||
g_twi_transfer_buffer[0] = i; | ||
// Copy the data from i to i+15. | ||
// Device will auto-increment register for data after the first byte | ||
// Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer. | ||
for (int j = 0; j < 16; j++) { | ||
g_twi_transfer_buffer[1 + j] = pwm_buffer[i + j]; | ||
} | ||
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#if ISSI_PERSISTENCE > 0 | ||
for (uint8_t i = 0; i < ISSI_PERSISTENCE; i++) { | ||
if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, ISSI_TIMEOUT) != 0) { | ||
return false; | ||
} | ||
} | ||
#else | ||
if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, ISSI_TIMEOUT) != 0) { | ||
return false; | ||
} | ||
#endif | ||
} | ||
return true; | ||
} | ||
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void IS31FL3733_init(uint8_t addr, uint8_t sync) { | ||
// In order to avoid the LEDs being driven with garbage data | ||
// in the LED driver's PWM registers, shutdown is enabled last. | ||
// Set up the mode and other settings, clear the PWM registers, | ||
// then disable software shutdown. | ||
// Sync is passed so set it according to the datasheet. | ||
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// Unlock the command register. | ||
IS31FL3733_write_register(addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5); | ||
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// Select PG0 | ||
IS31FL3733_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_LEDCONTROL); | ||
// Turn off all LEDs. | ||
for (int i = 0x00; i <= 0x17; i++) { | ||
IS31FL3733_write_register(addr, i, 0x00); | ||
} | ||
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// Unlock the command register. | ||
IS31FL3733_write_register(addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5); | ||
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// Select PG1 | ||
IS31FL3733_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_PWM); | ||
// Set PWM on all LEDs to 0 | ||
// No need to setup Breath registers to PWM as that is the default. | ||
for (int i = 0x00; i <= 0xBF; i++) { | ||
IS31FL3733_write_register(addr, i, 0x00); | ||
} | ||
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// Unlock the command register. | ||
IS31FL3733_write_register(addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5); | ||
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// 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. | ||
IS31FL3733_write_register(addr, ISSI_REG_CONFIGURATION, ((sync & 0b11) << 6) | ((ISSI_PWM_FREQUENCY & 0b111) << 3) | 0x01); | ||
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// Wait 10ms to ensure the device has woken up. | ||
wait_ms(10); | ||
} | ||
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void IS31FL3733_set_value(int index, uint8_t value) { | ||
if (index >= 0 && index < DRIVER_LED_TOTAL) { | ||
is31_led led = g_is31_leds[index]; | ||
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g_pwm_buffer[led.driver][led.v] = value; | ||
g_pwm_buffer_update_required[led.driver] = true; | ||
} | ||
} | ||
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void IS31FL3733_set_value_all(uint8_t value) { | ||
for (int i = 0; i < DRIVER_LED_TOTAL; i++) { | ||
IS31FL3733_set_value(i, value); | ||
} | ||
} | ||
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void IS31FL3733_set_led_control_register(uint8_t index, bool value) { | ||
is31_led led = g_is31_leds[index]; | ||
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uint8_t control_register = led.v / 8; | ||
uint8_t bit_value = led.v % 8; | ||
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if (value) { | ||
g_led_control_registers[led.driver][control_register] |= (1 << bit_value); | ||
} else { | ||
g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value); | ||
} | ||
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g_led_control_registers_update_required[led.driver] = true; | ||
} | ||
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void IS31FL3733_update_pwm_buffers(uint8_t addr, uint8_t index) { | ||
if (g_pwm_buffer_update_required[index]) { | ||
// Firstly we need to unlock the command register and select PG1. | ||
IS31FL3733_write_register(addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5); | ||
IS31FL3733_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_PWM); | ||
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// If any of the transactions fail we risk writing dirty PG0, | ||
// refresh page 0 just in case. | ||
if (!IS31FL3733_write_pwm_buffer(addr, g_pwm_buffer[index])) { | ||
g_led_control_registers_update_required[index] = true; | ||
} | ||
g_pwm_buffer_update_required[index] = false; | ||
} | ||
} | ||
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void IS31FL3733_update_led_control_registers(uint8_t addr, uint8_t index) { | ||
if (g_led_control_registers_update_required[index]) { | ||
// Firstly we need to unlock the command register and select PG0 | ||
IS31FL3733_write_register(addr, ISSI_COMMANDREGISTER_WRITELOCK, 0xC5); | ||
IS31FL3733_write_register(addr, ISSI_COMMANDREGISTER, ISSI_PAGE_LEDCONTROL); | ||
for (int i = 0; i < 24; i++) { | ||
IS31FL3733_write_register(addr, i, g_led_control_registers[index][i]); | ||
} | ||
g_led_control_registers_update_required[index] = false; | ||
} | ||
} |
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