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+/*
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+Copyright 2016 flabbergast <s3+flabbergast@sdfeu.org>
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+
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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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+
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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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+
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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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+/*
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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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+
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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 "host.h"
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+
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+#include "led_controller.h"
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+
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+#include "suspend.h"
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+
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+#include "usb_main.h"
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+
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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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+
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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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+
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+*Unused in Alphabet Layout
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+*/
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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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+
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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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+
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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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+
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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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+/* =================
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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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+/* ==============
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+/* ========================
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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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+ // disable hardware shutdown
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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, IS31_REG_SHUTDOWN_ON);
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+ chThdSleepMilliseconds(10);
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+ // zero function page, all registers
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+ is31_write_data(IS31_FUNCTIONREG, full_page, 0xD + 1);
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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_OFF);
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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(5);
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+ }
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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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+
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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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+
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+ //persistent status variables
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+ uint8_t pwm_step_status, page_status, capslock_status, numlock_status;
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+
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+ //mailbox variables
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+ uint8_t temp, msg_type;
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+ uint8_t msg_args[3];
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+ msg_t msg;
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+
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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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+ numlock_status = (host_keyboard_leds() & (1<<USB_LED_NUM_LOCK)) ? 1 : 0;
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+ capslock_status = (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) ? 1 : 0;
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+
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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_type = msg & 0xFF; //first byte is action information
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+ msg_args[0] = (msg >> 8) & 0xFF;
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+ msg_args[1] = (msg >> 16) & 0XFF;
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+ msg_args[2] = (msg >> 24) & 0xFF;
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+
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+
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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_args[1] = pin #, msg_args[0] = 8 bits to write
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+ //writes only to currently displayed page
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+ write_led_byte(page_status, msg_args[1], msg_args[0]);
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+ break;
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+
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+ case OFF_LED:
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+ //on/off/toggle single led, msg_args[0] = row/col of led, msg_args[1] = page
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+ set_led_bit(msg_args[1], control_register_word, msg_args[0], 0);
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+ break;
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+ case ON_LED:
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+ set_led_bit(msg_args[1], control_register_word, msg_args[0], 1);
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+ break;
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+ case TOGGLE_LED:
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+ set_led_bit(msg_args[1], control_register_word, msg_args[0], 2);
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+ break;
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+
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+ case BLINK_OFF_LED:
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+ //on/off/toggle single led, msg_args[0] = row/col of led
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+ set_led_bit(msg_args[1], control_register_word, msg_args[0], 4);
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+ break;
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+ case BLINK_ON_LED:
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+ set_led_bit(msg_args[1], control_register_word, msg_args[0], 5);
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+ break;
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+ case BLINK_TOGGLE_LED:
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+ set_led_bit(msg_args[1], control_register_word, msg_args[0], 6);
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+ break;
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+
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+ case TOGGLE_ALL:
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+ //turn on/off all leds, msg_args = unused
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+ is31_write_register(IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_ON);
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+ chThdSleepMilliseconds(5);
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+ is31_read_register(0, 0x00, &temp);
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+ is31_write_register(IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_OFF);
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+
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+ led_control_reg[0] = 0;
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+
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+ //toggle led mask based on current state (temp)
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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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+
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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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+
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+ page_status=0;
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+
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+ //maintain lock leds, reset to off and force recheck to blink of all leds toggled on
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+ numlock_status = 0;
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+ capslock_status = 0;
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+ led_set(host_keyboard_leds());
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+ }
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+ break;
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+
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+ case TOGGLE_BACKLIGHT:
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+ //msg_args[0] = on/off
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+
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+ //populate 9 byte rows to be written to each pin, first byte is register (pin) address
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+ if (msg_args[0] == 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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+
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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-matrix 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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+
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+ case DISPLAY_PAGE:
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+ //msg_args[0] = page to toggle on
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+ if (page_status != msg_args[0]) {
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+ is31_write_register(IS31_FUNCTIONREG, IS31_REG_PICTDISP, msg_args[0]);
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+ page_status = msg_args[0];
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+
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+ //maintain lock leds, reset to off and force recheck for new page
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+ numlock_status = 0;
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+ capslock_status = 0;
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+ led_set(host_keyboard_leds());
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+ }
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+ break;
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+
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+ case RESET_PAGE:
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+ //led_args[0] = 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_args[0], led_control_reg, 0x13);
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+
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+ //repeat for blink register
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+ led_control_reg[0] = 0x12;
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+ is31_write_data(msg_args[0], led_control_reg, 0x13);
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+ break;
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+
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+ case TOGGLE_NUM_LOCK:
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+ //msg_args[0] = 0 or 1, off/on
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+ if (numlock_status != msg_args[0]) {
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+ set_lock_leds(NUM_LOCK_LED_ADDRESS, msg_args[0], page_status);
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+ numlock_status = msg_args[0];
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+ }
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+ break;
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+ case TOGGLE_CAPS_LOCK:
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+ //msg_args[0] = 0 or 1, off/on
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+ if (capslock_status != msg_args[0]) {
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+ set_lock_leds(CAPS_LOCK_LED_ADDRESS, msg_args[0], page_status);
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+ capslock_status = msg_args[0];
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+ }
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+ break;
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+
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+ case STEP_BRIGHTNESS:
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+ //led_args[0] = step up (1) or down (0)
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+ switch (msg_args[0]) {
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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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+
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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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+
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+ //populate 8 byte arrays to write on each pin
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+ //first byte is register address, every 0x10 9 bytes are A-matrix pwm pins
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+ __builtin_memset(pwm_register_array+1, pwm_levels[pwm_step_status], 8);
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+
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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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+/* ==============================
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+ * led processing functions
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+ * ============================== */
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+
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+void set_led_bit (uint8_t page, uint8_t *led_control_word, 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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+ //action: 0 - off, 1 - on, 2 - toggle, 4 - blink on, 5 - blink off, 6 - toggle blink
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+
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+ uint8_t control_reg_addr, column_bit, column_byte, temp, blink_bit;
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+
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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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+
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+ blink_bit = action>>2;//check for blink bit
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+ action &= ~(1<<2); //strip blink bit
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+
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+ //led_addr 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-matrix is every other byte
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+ control_reg_addr += blink_bit == 1 ? 0x12 : 0x00;//if blink_bit, shift 12 bytes to blink register
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+
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|
+ is31_write_register(IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_ON);
|
|
|
+ chThdSleepMilliseconds(5);
|
|
|
+ is31_read_register(page, control_reg_addr, &temp);//maintain status of leds on this byte
|
|
|
+ is31_write_register(IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_OFF);
|
|
|
+
|
|
|
+ column_bit = 1<<(led_addr % 10 - 1);
|
|
|
+ column_byte = temp;
|
|
|
+
|
|
|
+ switch(action) {
|
|
|
+ case 0:
|
|
|
+ column_byte &= ~column_bit;
|
|
|
+ break;
|
|
|
+ case 1:
|
|
|
+ column_byte |= column_bit;
|
|
|
+ break;
|
|
|
+ case 2:
|
|
|
+ column_byte ^= column_bit;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ //return word to be written in register
|
|
|
+ led_control_word[0] = control_reg_addr;
|
|
|
+ led_control_word[1] = column_byte;
|
|
|
+ is31_write_data (page, led_control_word, 0x02);
|
|
|
+}
|
|
|
+
|
|
|
+void write_led_byte (uint8_t page, uint8_t row, uint8_t led_byte) {
|
|
|
+ uint8_t led_control_word[2] = {0};//register address and on/off byte
|
|
|
+
|
|
|
+ led_control_word[0] = (row - 1 ) * 0x02;// A-matrix is every other byte
|
|
|
+ led_control_word[1] = led_byte;
|
|
|
+ is31_write_data(page, led_control_word, 0x02);
|
|
|
+}
|
|
|
+
|
|
|
+void write_led_page (uint8_t page, uint8_t *user_led_array, uint8_t led_count) {
|
|
|
+ uint8_t i;
|
|
|
+ uint8_t pin, col;
|
|
|
+ uint8_t led_control_register[0x13] = {0};
|
|
|
+
|
|
|
+ __builtin_memset(led_control_register,0,13);
|
|
|
+
|
|
|
+ for(i=0;i<led_count;i++){
|
|
|
+ //shift pin by 1 for led register 0x00 address
|
|
|
+ pin = ((user_led_array[i] / 10) % 10 - 1 ) * 2 + 1;
|
|
|
+ col = user_led_array[i] % 10 - 1;
|
|
|
+ led_control_register[pin] |= 1<<(col);
|
|
|
+ }
|
|
|
+
|
|
|
+ is31_write_data(page, led_control_register, 0x13);
|
|
|
+}
|
|
|
+
|
|
|
+void set_lock_leds(uint8_t led_addr, uint8_t led_action, uint8_t page) {
|
|
|
+ uint8_t temp;
|
|
|
+ uint8_t led_control_word[2] = {0};
|
|
|
+
|
|
|
+ //blink if all leds are on
|
|
|
+ if (page == 0) {
|
|
|
+ is31_write_register(IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_ON);
|
|
|
+ chThdSleepMilliseconds(5);
|
|
|
+ is31_read_register(0, 0x00, &temp);
|
|
|
+ is31_write_register(IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_OFF);
|
|
|
+
|
|
|
+ if (temp == 0xFF) {
|
|
|
+ led_action |= (1<<2); //set blink bit
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ set_led_bit(page,led_control_word,led_addr,led_action);
|
|
|
+}
|
|
|
+
|
|
|
+/* =====================
|
|
|
+ * hook into user keymap
|
|
|
+ * ===================== */
|
|
|
+void led_controller_init(void) {
|
|
|
+ uint8_t i;
|
|
|
+
|
|
|
+ /* initialise I2C */
|
|
|
+ /* I2C pins */
|
|
|
+ palSetPadMode(GPIOB, 0, PAL_MODE_ALTERNATIVE_2); // PTB0/I2C0/SCL
|
|
|
+ palSetPadMode(GPIOB, 1, PAL_MODE_ALTERNATIVE_2); // PTB1/I2C0/SDA
|
|
|
+ /* start I2C */
|
|
|
+ i2cStart(&I2CD1, &i2ccfg);
|
|
|
+ // try high drive (from kiibohd)
|
|
|
+ I2CD1.i2c->C2 |= I2Cx_C2_HDRS;
|
|
|
+ // try glitch fixing (from kiibohd)
|
|
|
+ I2CD1.i2c->FLT = 4;
|
|
|
+
|
|
|
+ chThdSleepMilliseconds(10);
|
|
|
+
|
|
|
+ /* initialise IS31 chip */
|
|
|
+ is31_init();
|
|
|
+
|
|
|
+ //set Display Option Register so all pwm intensity is controlled from page 0
|
|
|
+ //enable blink and set blink period to 0.27s x rate
|
|
|
+ is31_write_register(IS31_FUNCTIONREG, IS31_REG_DISPLAYOPT, IS31_REG_DISPLAYOPT_INTENSITY_SAME + IS31_REG_DISPLAYOPT_BLINK_ENABLE + 4);
|
|
|
+
|
|
|
+ /* set full pwm on page 1 */
|
|
|
+ pwm_register_array[0] = 0;
|
|
|
+ __builtin_memset(pwm_register_array+1, 0xFF, 8);
|
|
|
+ for(i=0; i<8; i++) {
|
|
|
+ pwm_register_array[0] = 0x24 + (i * 0x10);//first byte of 9 bytes must be register address
|
|
|
+ is31_write_data(0, pwm_register_array, 9);
|
|
|
+ chThdSleepMilliseconds(5);
|
|
|
+ }
|
|
|
+
|
|
|
+ /* enable breathing when the displayed page changes */
|
|
|
+ // Fade-in Fade-out, time = 26ms * 2^N, N=3
|
|
|
+ is31_write_register(IS31_FUNCTIONREG, IS31_REG_BREATHCTRL1, (3<<4)|3);
|
|
|
+ is31_write_register(IS31_FUNCTIONREG, IS31_REG_BREATHCTRL2, IS31_REG_BREATHCTRL2_ENABLE|3);
|
|
|
+
|
|
|
+ /* more time consuming LED processing should be offloaded into
|
|
|
+ * a thread, with asynchronous messaging. */
|
|
|
+ chMBObjectInit(&led_mailbox, led_mailbox_queue, LED_MAILBOX_NUM_MSGS);
|
|
|
+ chThdCreateStatic(waLEDthread, sizeof(waLEDthread), LOWPRIO, LEDthread, NULL);
|
|
|
+}
|
Jack Humbert