diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/issi/is31fl3731-simple.c | 240 | ||||
| -rw-r--r-- | drivers/issi/is31fl3731-simple.h | 209 |
2 files changed, 449 insertions, 0 deletions
diff --git a/drivers/issi/is31fl3731-simple.c b/drivers/issi/is31fl3731-simple.c new file mode 100644 index 0000000000..46d51dac70 --- /dev/null +++ b/drivers/issi/is31fl3731-simple.c @@ -0,0 +1,240 @@ +/* Copyright 2017 Jason Williams + * Copyright 2018 Jack Humbert + * + * 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/>. + */ + +#ifdef __AVR__ +#include <avr/interrupt.h> +#include <avr/io.h> +#include <util/delay.h> +#else +#include "wait.h" +#endif + +#include <stdint.h> +#include <stdbool.h> +#include <string.h> +#include "is31fl3731-simple.h" +#include "i2c_master.h" +#include "progmem.h" + +// 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: +// 0b1110100 AD <-> GND +// 0b1110111 AD <-> VCC +// 0b1110101 AD <-> SCL +// 0b1110110 AD <-> SDA +#define ISSI_ADDR_DEFAULT 0x74 + +#define ISSI_REG_CONFIG 0x00 +#define ISSI_REG_CONFIG_PICTUREMODE 0x00 +#define ISSI_REG_CONFIG_AUTOPLAYMODE 0x08 +#define ISSI_REG_CONFIG_AUDIOPLAYMODE 0x18 + +#define ISSI_CONF_PICTUREMODE 0x00 +#define ISSI_CONF_AUTOFRAMEMODE 0x04 +#define ISSI_CONF_AUDIOMODE 0x08 + +#define ISSI_REG_PICTUREFRAME 0x01 + +#define ISSI_REG_SHUTDOWN 0x0A +#define ISSI_REG_AUDIOSYNC 0x06 + +#define ISSI_COMMANDREGISTER 0xFD +#define ISSI_BANK_FUNCTIONREG 0x0B // helpfully called 'page nine' + +#ifndef ISSI_TIMEOUT + #define ISSI_TIMEOUT 100 +#endif + +#ifndef ISSI_PERSISTENCE + #define ISSI_PERSISTENCE 0 +#endif + +// Transfer buffer for TWITransmitData() +uint8_t g_twi_transfer_buffer[20]; + +// These buffers match the IS31FL3731 PWM registers 0x24-0xB3. +// 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 IS31FL3731_write_pwm_buffer() but it's +// probably not worth the extra complexity. +uint8_t g_pwm_buffer[DRIVER_COUNT][144]; +bool g_pwm_buffer_update_required = false; + +uint8_t g_led_control_registers[DRIVER_COUNT][18] = { { 0 }, { 0 } }; +bool g_led_control_registers_update_required = false; + +// This is the bit pattern in the LED control registers +// (for matrix A, add one to register for matrix B) +// +// reg - b7 b6 b5 b4 b3 b2 b1 b0 +// 0x00 - R08,R07,R06,R05,R04,R03,R02,R01 +// 0x02 - G08,G07,G06,G05,G04,G03,G02,R00 +// 0x04 - B08,B07,B06,B05,B04,B03,G01,G00 +// 0x06 - - , - , - , - , - ,B02,B01,B00 +// 0x08 - - , - , - , - , - , - , - , - +// 0x0A - B17,B16,B15, - , - , - , - , - +// 0x0C - G17,G16,B14,B13,B12,B11,B10,B09 +// 0x0E - R17,G15,G14,G13,G12,G11,G10,G09 +// 0x10 - R16,R15,R14,R13,R12,R11,R10,R09 + + +void IS31FL3731_write_register(uint8_t addr, uint8_t reg, uint8_t data) { + g_twi_transfer_buffer[0] = reg; + g_twi_transfer_buffer[1] = data; + + #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) { + break; + } + } + #else + i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, ISSI_TIMEOUT); + #endif +} + +void IS31FL3731_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) { + // assumes bank is already selected + + // transmit PWM registers in 9 transfers of 16 bytes + // g_twi_transfer_buffer[] is 20 bytes + + // iterate over the pwm_buffer contents at 16 byte intervals + for (int i = 0; i < 144; i += 16) { + // set the first register, e.g. 0x24, 0x34, 0x44, etc. + g_twi_transfer_buffer[0] = 0x24 + i; + // copy the data from i to i+15 + // device will auto-increment register for data after the first byte + // thus this sets registers 0x24-0x33, 0x34-0x43, etc. in one transfer + for (int j = 0; j < 16; j++) { + g_twi_transfer_buffer[1 + j] = pwm_buffer[i + j]; + } + + #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) + break; + } + #else + i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, ISSI_TIMEOUT); + #endif + } +} + +void IS31FL3731_init(uint8_t addr) { + // In order to avoid the LEDs being driven with garbage data + // in the LED driver's PWM registers, first enable software shutdown, + // then set up the mode and other settings, clear the PWM registers, + // then disable software shutdown. + + // select "function register" bank + IS31FL3731_write_register(addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG); + + // enable software shutdown + IS31FL3731_write_register(addr, ISSI_REG_SHUTDOWN, 0x00); + // this delay was copied from other drivers, might not be needed + // FIXME: Don't we have a wrapper for this already? + #ifdef __AVR__ + _delay_ms(10); + #else + wait_ms(10); + #endif + + // picture mode + IS31FL3731_write_register(addr, ISSI_REG_CONFIG, ISSI_REG_CONFIG_PICTUREMODE); + // display frame 0 + IS31FL3731_write_register(addr, ISSI_REG_PICTUREFRAME, 0x00); + // audio sync off + IS31FL3731_write_register(addr, ISSI_REG_AUDIOSYNC, 0x00); + + // select bank 0 + IS31FL3731_write_register(addr, ISSI_COMMANDREGISTER, 0); + + // turn off all LEDs in the LED control register + for (int i = 0x00; i <= 0x11; i++) { + IS31FL3731_write_register(addr, i, 0x00); + } + + // turn off all LEDs in the blink control register (not really needed) + for (int i = 0x12; i <= 0x23; i++) { + IS31FL3731_write_register(addr, i, 0x00); + } + + // set PWM on all LEDs to 0 + for (int i = 0x24; i <= 0xB3; i++) { + IS31FL3731_write_register(addr, i, 0x00); + } + + // select "function register" bank + IS31FL3731_write_register(addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG); + + // disable software shutdown + IS31FL3731_write_register(addr, ISSI_REG_SHUTDOWN, 0x01); + + // select bank 0 and leave it selected. + // most usage after initialization is just writing PWM buffers in bank 0 + // as there's not much point in double-buffering + IS31FL3731_write_register(addr, ISSI_COMMANDREGISTER, 0); + +} + +void IS31FL3731_set_value(int index, uint8_t value) { + if (index >= 0 && index < DRIVER_LED_TOTAL) { + is31_led led = g_is31_leds[index]; + + // Subtract 0x24 to get the second index of g_pwm_buffer + g_pwm_buffer[led.driver][led.v - 0x24] = value; + g_pwm_buffer_update_required = true; + } +} + +void IS31FL3731_set_value_all(uint8_t value) { + for (int i = 0; i < DRIVER_LED_TOTAL; i++) { + IS31FL3731_set_value(i, value); + } +} + +void IS31FL3731_set_led_control_register(uint8_t index, bool value) { + is31_led led = g_is31_leds[index]; + + uint8_t control_register = (led.v - 0x24) / 8; + uint8_t bit_value = (led.v - 0x24) % 8; + + 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); + } + + g_led_control_registers_update_required = true; +} + +void IS31FL3731_update_pwm_buffers(uint8_t addr, uint8_t index) { + if (g_pwm_buffer_update_required) { + IS31FL3731_write_pwm_buffer(addr, g_pwm_buffer[index]); + g_pwm_buffer_update_required = false; + } +} + +void IS31FL3731_update_led_control_registers(uint8_t addr, uint8_t index) { + if (g_led_control_registers_update_required) { + for (int i=0; i<18; i++) { + IS31FL3731_write_register(addr, i, g_led_control_registers[index][i]); + } + } +} diff --git a/drivers/issi/is31fl3731-simple.h b/drivers/issi/is31fl3731-simple.h new file mode 100644 index 0000000000..c102837a30 --- /dev/null +++ b/drivers/issi/is31fl3731-simple.h @@ -0,0 +1,209 @@ +/* Copyright 2017 Jason Williams + * Copyright 2018 Jack Humbert + * + * 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/>. + */ + + +#ifndef IS31FL3731_DRIVER_H +#define IS31FL3731_DRIVER_H + + +typedef struct is31_led { + uint8_t driver:2; + uint8_t v; +} __attribute__((packed)) is31_led; + +extern const is31_led g_is31_leds[DRIVER_LED_TOTAL]; + +void IS31FL3731_init(uint8_t addr); +void IS31FL3731_write_register(uint8_t addr, uint8_t reg, uint8_t data); +void IS31FL3731_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer); + +void IS31FL3731_set_value(int index, uint8_t value); +void IS31FL3731_set_value_all(uint8_t value); + +void IS31FL3731_set_led_control_register(uint8_t index, bool value); + +// This should not be called from an interrupt +// (eg. from a timer interrupt). +// Call this while idle (in between matrix scans). +// If the buffer is dirty, it will update the driver with the buffer. +void IS31FL3731_update_pwm_buffers(uint8_t addr, uint8_t index); +void IS31FL3731_update_led_control_registers(uint8_t addr, uint8_t index); + +#define C1_1 0x24 +#define C1_2 0x25 +#define C1_3 0x26 +#define C1_4 0x27 +#define C1_5 0x28 +#define C1_6 0x29 +#define C1_7 0x2A +#define C1_8 0x2B + +#define C1_9 0x2C +#define C1_10 0x2D +#define C1_11 0x2E +#define C1_12 0x2F +#define C1_13 0x30 +#define C1_14 0x31 +#define C1_15 0x32 +#define C1_16 0x33 + +#define C2_1 0x34 +#define C2_2 0x35 +#define C2_3 0x36 +#define C2_4 0x37 +#define C2_5 0x38 +#define C2_6 0x39 +#define C2_7 0x3A +#define C2_8 0x3B + +#define C2_9 0x3C +#define C2_10 0x3D +#define C2_11 0x3E +#define C2_12 0x3F +#define C2_13 0x40 +#define C2_14 0x41 +#define C2_15 0x42 +#define C2_16 0x43 + +#define C3_1 0x44 +#define C3_2 0x45 +#define C3_3 0x46 +#define C3_4 0x47 +#define C3_5 0x48 +#define C3_6 0x49 +#define C3_7 0x4A +#define C3_8 0x4B + +#define C3_9 0x4C +#define C3_10 0x4D +#define C3_11 0x4E +#define C3_12 0x4F +#define C3_13 0x50 +#define C3_14 0x51 +#define C3_15 0x52 +#define C3_16 0x53 + +#define C4_1 0x54 +#define C4_2 0x55 +#define C4_3 0x56 +#define C4_4 0x57 +#define C4_5 0x58 +#define C4_6 0x59 +#define C4_7 0x5A +#define C4_8 0x5B + +#define C4_9 0x5C +#define C4_10 0x5D +#define C4_11 0x5E +#define C4_12 0x5F +#define C4_13 0x60 +#define C4_14 0x61 +#define C4_15 0x62 +#define C4_16 0x63 + +#define C5_1 0x64 +#define C5_2 0x65 +#define C5_3 0x66 +#define C5_4 0x67 +#define C5_5 0x68 +#define C5_6 0x69 +#define C5_7 0x6A +#define C5_8 0x6B + +#define C5_9 0x6C +#define C5_10 0x6D +#define C5_11 0x6E +#define C5_12 0x6F +#define C5_13 0x70 +#define C5_14 0x71 +#define C5_15 0x72 +#define C5_16 0x73 + +#define C6_1 0x74 +#define C6_2 0x75 +#define C6_3 0x76 +#define C6_4 0x77 +#define C6_5 0x78 +#define C6_6 0x79 +#define C6_7 0x7A +#define C6_8 0x7B + +#define C6_9 0x7C +#define C6_10 0x7D +#define C6_11 0x7E +#define C6_12 0x7F +#define C6_13 0x80 +#define C6_14 0x81 +#define C6_15 0x82 +#define C6_16 0x83 + +#define C7_1 0x84 +#define C7_2 0x85 +#define C7_3 0x86 +#define C7_4 0x87 +#define C7_5 0x88 +#define C7_6 0x89 +#define C7_7 0x8A +#define C7_8 0x8B + +#define C7_9 0x8C +#define C7_10 0x8D +#define C7_11 0x8E +#define C7_12 0x8F +#define C7_13 0x90 +#define C7_14 0x91 +#define C7_15 0x92 +#define C7_16 0x93 + +#define C8_1 0x94 +#define C8_2 0x95 +#define C8_3 0x96 +#define C8_4 0x97 +#define C8_5 0x98 +#define C8_6 0x99 +#define C8_7 0x9A +#define C8_8 0x9B + +#define C8_9 0x9C +#define C8_10 0x9D +#define C8_11 0x9E +#define C8_12 0x9F +#define C8_13 0xA0 +#define C8_14 0xA1 +#define C8_15 0xA2 +#define C8_16 0xA3 + +#define C9_1 0xA4 +#define C9_2 0xA5 +#define C9_3 0xA6 +#define C9_4 0xA7 +#define C9_5 0xA8 +#define C9_6 0xA9 +#define C9_7 0xAA +#define C9_8 0xAB + +#define C9_9 0xAC +#define C9_10 0xAD +#define C9_11 0xAE +#define C9_12 0xAF +#define C9_13 0xB0 +#define C9_14 0xB1 +#define C9_15 0xB2 +#define C9_16 0xB3 + + +#endif // IS31FL3731_DRIVER_H |