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462 lines
14 KiB
462 lines
14 KiB
/*
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Copyright 2016 flabbergast <s3+flabbergast@sdfeu.org>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* LED controller code
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* IS31FL3731C matrix LED driver from ISSI
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* datasheet: http://www.issi.com/WW/pdf/31FL3731C.pdf
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*/
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#include "ch.h"
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#include "hal.h"
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#include "print.h"
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#include "led.h"
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#include "action_layer.h"
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#include "host.h"
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#include "led_controller.h"
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#include "suspend.h"
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#include "usb_main.h"
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/* Infinity60 LED MAP
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- digits mean "row" and "col", i.e. 45 means C4-5 in the IS31 datasheet, matrix A
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11 12 13 14 15 16 17 18 21 22 23 24 25 26 27*
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28 31 32 33 34 35 36 37 38 41 42 43 44 45
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46 47 48 51 52 53 54 55 56 57 58 61 62
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63 64 65 66 67 68 71 72 73 74 75 76 77*
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78 81 82 83 84 85 86 87
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*Unused in Alphabet Layout
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*/
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/*
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each page has 0xB4 bytes
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0 - 0x11: LED control (on/off):
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order: CA1, CB1, CA2, CB2, .... (CA - matrix A, CB - matrix B)
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CAn controls Cn-8 .. Cn-1 (LSbit)
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0x12 - 0x23: blink control (like "LED control")
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0x24 - 0xB3: PWM control: byte per LED, 0xFF max on
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order same as above (CA 1st row (8bytes), CB 1st row (8bytes), ...)
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*/
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// Which LED should be used for CAPS LOCK indicator
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#if !defined(CAPS_LOCK_LED_ADDRESS)
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#define CAPS_LOCK_LED_ADDRESS 46
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#endif
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#if !defined(NUM_LOCK_LED_ADDRESS)
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#define NUM_LOCK_LED_ADDRESS 85
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#endif
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/* Which LED should breathe during sleep */
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#if !defined(BREATHE_LED_ADDRESS)
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#define BREATHE_LED_ADDRESS CAPS_LOCK_LED_ADDRESS
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#endif
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/* =================
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* ChibiOS I2C setup
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* ================= */
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static const I2CConfig i2ccfg = {
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400000 // clock speed (Hz); 400kHz max for IS31
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};
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/* ==============
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* variables
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* ============== */
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// internal communication buffers
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uint8_t tx[2] __attribute__((aligned(2)));
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uint8_t rx[1] __attribute__((aligned(2)));
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// buffer for sending the whole page at once (used also as a temp buffer)
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uint8_t full_page[0xB4+1] = {0};
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// LED mask (which LEDs are present, selected by bits)
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// IC60 pcb uses only CA matrix.
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// Each byte is a control pin for 8 leds ordered 8-1
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const uint8_t all_on_leds_mask[0x12] = {
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0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
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0x00, 0xFF, 0x00, 0xFF, 0x00, 0x7F, 0x00, 0x00, 0x00
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};
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// array to hold brightness pwm steps
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const uint8_t pwm_levels[5] = {
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0x00, 0x16, 0x4E, 0xA1, 0xFF
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};
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// array to write to pwm register
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uint8_t pwm_register_array[9] = {0};
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/* ============================
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* communication functions
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* ============================ */
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msg_t is31_select_page(uint8_t page) {
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tx[0] = IS31_COMMANDREGISTER;
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tx[1] = page;
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return i2cMasterTransmitTimeout(&I2CD1, IS31_ADDR_DEFAULT, tx, 2, NULL, 0, US2ST(IS31_TIMEOUT));
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}
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msg_t is31_write_data(uint8_t page, uint8_t *buffer, uint8_t size) {
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is31_select_page(page);
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return i2cMasterTransmitTimeout(&I2CD1, IS31_ADDR_DEFAULT, buffer, size, NULL, 0, US2ST(IS31_TIMEOUT));
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}
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msg_t is31_write_register(uint8_t page, uint8_t reg, uint8_t data) {
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is31_select_page(page);
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tx[0] = reg;
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tx[1] = data;
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return i2cMasterTransmitTimeout(&I2CD1, IS31_ADDR_DEFAULT, tx, 2, NULL, 0, US2ST(IS31_TIMEOUT));
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}
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msg_t is31_read_register(uint8_t page, uint8_t reg, uint8_t *result) {
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is31_select_page(page);
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tx[0] = reg;
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return i2cMasterTransmitTimeout(&I2CD1, IS31_ADDR_DEFAULT, tx, 1, result, 1, US2ST(IS31_TIMEOUT));
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}
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/* ========================
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* initialise the IS31 chip
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* ======================== */
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void is31_init(void) {
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// just to be sure that it's all zeroes
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__builtin_memset(full_page,0,0xB4+1);
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// zero function page, all registers (assuming full_page is all zeroes)
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is31_write_data(IS31_FUNCTIONREG, full_page, 0xD + 1);
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palSetPadMode(GPIOB, 16, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPad(GPIOB, 16);
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chThdSleepMilliseconds(10);
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// software shutdown
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is31_write_register(IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, 0);
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chThdSleepMilliseconds(10);
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// software shutdown disable (i.e. turn stuff on)
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is31_write_register(IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_ON);
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chThdSleepMilliseconds(10);
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// zero all LED registers on all 8 pages
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uint8_t i;
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for(i=0; i<8; i++) {
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is31_write_data(i, full_page, 0xB4 + 1);
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chThdSleepMilliseconds(1);
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}
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}
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/* ==================
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* LED control thread
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* ================== */
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#define LED_MAILBOX_NUM_MSGS 5
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static msg_t led_mailbox_queue[LED_MAILBOX_NUM_MSGS];
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mailbox_t led_mailbox;
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static THD_WORKING_AREA(waLEDthread, 256);
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static THD_FUNCTION(LEDthread, arg) {
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(void)arg;
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chRegSetThreadName("LEDthread");
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uint8_t i;
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uint8_t control_register_word[2] = {0};//2 bytes: register address, byte to write
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uint8_t led_control_reg[0x13] = {0};//led control register start address + 0x12 bytes
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//persistent status variables
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uint8_t pwm_step_status, page_status;
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//mailbox variables
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uint8_t temp, msg_type, msg_pin, msg_col, msg_led;
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msg_t msg;
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// initialize persistent variables
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pwm_step_status = 4; //full brightness
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page_status = 0; //start frame 0 (all off/on)
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while(true) {
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// wait for a message (asynchronous)
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// (messages are queued (up to LED_MAILBOX_NUM_MSGS) if they can't
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// be processed right away)
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chMBFetch(&led_mailbox, &msg, TIME_INFINITE);
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msg_col = (msg >> 24) & 0xFF;//if needed
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msg_pin = (msg >> 16) & 0XFF;//if needed (e.g. SET_FULL_ROW)
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msg_type = (msg >> 8) & 0xFF; //second byte is msg type
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msg_led = (msg) & 0xFF; //first byte is action information
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switch (msg_type){
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case SET_FULL_ROW:
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//write full byte to pin address, msg_pin = pin #, msg_led = byte to write
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//writes only to current page
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write_led_byte(page_status,msg_pin,msg_led);
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break;
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case OFF_LED:
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//on/off/toggle single led, msg_led = row/col of led
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set_led_bit(7, control_register_word, msg_led, 0);
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is31_write_data (7, control_register_word, 0x02);
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break;
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case ON_LED:
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set_led_bit(7, control_register_word, msg_led, 1);
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is31_write_data (7, control_register_word, 0x02);
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break;
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case TOGGLE_LED:
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set_led_bit(7, control_register_word, msg_led, 2);
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is31_write_data (7, control_register_word, 0x02);
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break;
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case BLINK_OFF_LED:
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//on/off/toggle single led, msg_led = row/col of led
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set_led_bit(7, control_register_word, msg_led, 4);
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is31_write_data (7, control_register_word, 0x02);
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break;
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case BLINK_ON_LED:
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set_led_bit(7, control_register_word, msg_led, 5);
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is31_write_data (7, control_register_word, 0x02);
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break;
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case BLINK_TOGGLE_LED:
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set_led_bit(7, control_register_word, msg_led, 6);
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is31_write_data (7, control_register_word, 0x02);
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break;
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case TOGGLE_ALL:
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//msg_led = unused
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is31_read_register(0, 0x00, &temp);
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led_control_reg[0] = 0;
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//if first byte is on, then toggle frame 0 off
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if (temp==0 || page_status > 0) {
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__builtin_memcpy(led_control_reg+1, all_on_leds_mask, 0x12);
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} else {
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__builtin_memset(led_control_reg+1, 0, 0x12);
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}
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is31_write_data(0, led_control_reg, 0x13);
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if (page_status > 0) {
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is31_write_register(IS31_FUNCTIONREG, IS31_REG_PICTDISP, 0);
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page_status=0;
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//maintain lock leds
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led_set(host_keyboard_leds());
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}
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break;
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case TOGGLE_BACKLIGHT:
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//msg_led = on/off
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//populate the 9 byte rows to be written to each pin, first byte is register (pin) address
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if (msg_led == 1) {
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__builtin_memset(pwm_register_array+1, pwm_levels[pwm_step_status], 8);
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} else {
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__builtin_memset(pwm_register_array+1, 0, 8);
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}
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for(i=0; i<8; i++) {
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//first byte is register address, every 0x10 9 bytes is A-register pwm pins
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pwm_register_array[0] = 0x24 + (i * 0x10);
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is31_write_data(0,pwm_register_array,9);
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}
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break;
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case DISPLAY_PAGE:
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//msg_led = page to toggle on
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if (page_status != msg_led) {
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is31_write_register(IS31_FUNCTIONREG, IS31_REG_PICTDISP, msg_led);
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page_status = msg_led;
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//maintain lock leds
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led_set(host_keyboard_leds());
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}
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break;
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case RESET_PAGE:
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//led_msg = page to reset
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led_control_reg[0] = 0;
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__builtin_memset(led_control_reg+1, 0, 0x12);
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is31_write_data(msg_led, led_control_reg, 0x13);
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break;
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case TOGGLE_NUM_LOCK:
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//msg_led = 0 or 1, off/on
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set_lock_leds(NUM_LOCK_LED_ADDRESS, msg_led, page_status);
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break;
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case TOGGLE_CAPS_LOCK:
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//msg_led = 0 or 1, off/on
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set_lock_leds(CAPS_LOCK_LED_ADDRESS, msg_led, page_status);
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break;
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case STEP_BRIGHTNESS:
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//led_msg = step pwm up or down
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switch (msg_led) {
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case 0:
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if (pwm_step_status == 0) {
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pwm_step_status = 4;
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} else {
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pwm_step_status--;
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}
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break;
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case 1:
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if (pwm_step_status == 4) {
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pwm_step_status = 0;
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} else {
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pwm_step_status++;
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}
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break;
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}
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//populate 8 byte rows to write on each pin
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//first byte is register address, every 0x10 9 bytes are A-register pwm pins
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__builtin_memset(pwm_register_array+1, pwm_levels[pwm_step_status], 8);
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for(i=0; i<8; i++) {
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pwm_register_array[0] = 0x24 + (i * 0x10);
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is31_write_data(0,pwm_register_array,9);
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}
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break;
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}
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}
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}
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/* ==============================
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* led processing functions
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* ============================== */
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void set_led_bit (uint8_t page, uint8_t *led_control_reg, uint8_t led_addr, uint8_t action) {
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//returns 2 bytes: led control register address and byte to write
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//0 - bit off, 1 - bit on, 2 - toggle bit
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uint8_t control_reg_addr, column_bit, column_byte, bit_temp, blink_on;
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//check for valid led address
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if (led_addr < 0 || led_addr > 87 || led_addr % 10 > 8) {
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return;
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}
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//check for blink bit
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blink_on = action>>2;
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action &= ~(1<<2); //strip blink bit
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//first byte is led control register address 0x00
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//msg_led tens column is pin#, ones column is bit position in 8-bit mask
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control_reg_addr = ((led_addr / 10) % 10 - 1 ) * 0x02;// A-register is every other byte
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control_reg_addr += blink_on == 1 ? 0x12 : 0x00;//shift 12 bytes to blink register
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is31_read_register(page, control_reg_addr, &bit_temp);//maintain status of leds on this byte
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column_bit = 1<<(led_addr % 10 - 1);
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column_byte = bit_temp;
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switch(action) {
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case 0:
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column_byte &= ~column_bit;
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break;
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case 1:
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column_byte |= column_bit;
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break;
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case 2:
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column_byte ^= column_bit;
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break;
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}
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//return word to be written in register
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led_control_reg[0] = control_reg_addr;
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led_control_reg[1] = column_byte;
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}
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void write_led_byte (uint8_t page, uint8_t row, uint8_t led_byte) {
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uint8_t led_control_word[2] = {0};//register address and on/off byte
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led_control_word[0] = (row - 1 ) * 0x02;// A-register is every other byte
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led_control_word[1] = led_byte;
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is31_write_data(page, led_control_word, 0x02);
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}
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void write_led_page (uint8_t page, uint8_t *user_led_array, uint8_t led_count) {
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uint8_t i;
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uint8_t pin, col;
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uint8_t led_control_register[0x13] = {0};
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__builtin_memset(led_control_register,0,13);
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for(i=0;i<led_count;i++){
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// 1 byte shift for led register 0x00 address
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pin = ((user_led_array[i] / 10) % 10 - 1 ) * 2 + 1;
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col = user_led_array[i] % 10 - 1;
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led_control_register[pin] |= 1<<(col);
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}
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is31_write_data(page, led_control_register, 0x13);
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}
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void set_lock_leds(uint8_t led_addr, uint8_t led_action, uint8_t page) {
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uint8_t lock_temp;
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uint8_t led_control_word[2] = {0};
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//blink if all leds are on
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if (page == 0) {
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is31_read_register(0, 0x00, &lock_temp);
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if (lock_temp == 0xFF) {
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led_action |= (1<<2); //set blink bit
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}
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}
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set_led_bit(page,led_control_word,led_addr,led_action);
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is31_write_data(page, led_control_word, 0x02);
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}
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/* =====================
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* hook into user keymap
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* ===================== */
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void led_controller_init(void) {
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uint8_t i;
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/* initialise I2C */
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/* I2C pins */
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palSetPadMode(GPIOB, 0, PAL_MODE_ALTERNATIVE_2); // PTB0/I2C0/SCL
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palSetPadMode(GPIOB, 1, PAL_MODE_ALTERNATIVE_2); // PTB1/I2C0/SDA
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/* start I2C */
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i2cStart(&I2CD1, &i2ccfg);
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// try high drive (from kiibohd)
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I2CD1.i2c->C2 |= I2Cx_C2_HDRS;
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// try glitch fixing (from kiibohd)
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I2CD1.i2c->FLT = 4;
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chThdSleepMilliseconds(10);
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/* initialise IS31 chip */
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is31_init();
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//set Display Option Register so all pwm intensity is controlled from page 0
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//enable blink and set blink period to 0.27s x rate
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is31_write_register(IS31_FUNCTIONREG, IS31_REG_DISPLAYOPT, IS31_REG_DISPLAYOPT_INTENSITY_SAME + IS31_REG_DISPLAYOPT_BLINK_ENABLE + 4);
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/* set full pwm on page 1 */
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pwm_register_array[0] = 0;
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__builtin_memset(pwm_register_array+1, 0xFF, 8);
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for(i=0; i<8; i++) {
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pwm_register_array[0] = 0x24 + (i * 0x10);//first byte of 9 bytes must be register address
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is31_write_data(0, pwm_register_array, 9);
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chThdSleepMilliseconds(5);
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}
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/* enable breathing when the displayed page changes */
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// Fade-in Fade-out, time = 26ms * 2^N, N=3
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is31_write_register(IS31_FUNCTIONREG, IS31_REG_BREATHCTRL1, (3<<4)|3);
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is31_write_register(IS31_FUNCTIONREG, IS31_REG_BREATHCTRL2, IS31_REG_BREATHCTRL2_ENABLE|3);
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/* more time consuming LED processing should be offloaded into
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* a thread, with asynchronous messaging. */
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chMBObjectInit(&led_mailbox, led_mailbox_queue, LED_MAILBOX_NUM_MSGS);
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chThdCreateStatic(waLEDthread, sizeof(waLEDthread), LOWPRIO, LEDthread, NULL);
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}
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