qmk_firmware/keyboards/infinity60/led.c

/*
Copyright 2015 Jun Wako <wakojun@gmail.com>

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/>.
*/

#include "hal.h"

#include "led.h"

#include "led_controller.h"

/* WARNING! This function needs to be callable from
 * both regular threads and ISRs, unlocked (during resume-from-sleep).
 * In particular, I2C functions (interrupt-driven) should NOT be called from here.
 */
void led_set(uint8_t usb_led) {
/*
    // PTA5: LED (1:on/0:off)
    GPIOA->PDDR |= (1<<1);
    PORTA->PCR[5] |= PORTx_PCRn_DSE | PORTx_PCRn_MUX(1);
    if (usb_led & (1<<USB_LED_CAPS_LOCK)) {
        GPIOA->PSOR |= (1<<5);
    } else {
        GPIOA->PCOR |= (1<<5);
    }
 */
//TODO: How does this test if led is set
//usb_led --> led_set(usb_led) <-- chibios/host_keyboard_leds <-- keyboard_leds from usbSetupTransfer
//keyboard_leds is enum'd in chibios/main.c
    if (usb_led & (1<<USB_LED_CAPS_LOCK)) {
        // signal the LED control thread
        chSysUnconditionalLock();
        chMBPostI(&led_mailbox, 0x59);
        chSysUnconditionalUnlock();
    } else {
        // signal the LED control thread
        chSysUnconditionalLock();
        chMBPostI(&led_mailbox, 0x59);
        chSysUnconditionalUnlock();
    }
}