ahoneybun/qmk_firmware
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Backlight - Carve out a better location for private driver functionality (#8329)

Browse source 
* rename backlight_soft to match rules.mk

* rename backlight_soft to match rules.mk - update common_features

* Carve out a better location for private driver backlight functionality
This commit is contained in:
Joel Challis 2020-03-07 12:09:49 +00:00 • committed by GitHub
parent d7ba0ad684
commit 3a303bd2ae
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
8 changed files with 73 additions and 69 deletions
Download patch file Download diff file Expand all files Collapse all files

48
quantum/backlight/backlight_software.c Normal file
View file

@ -0,0 +1,48 @@
#include "quantum.h"
#include "backlight.h"
#include "backlight_driver_common.h"
#ifdef BACKLIGHT_BREATHING
# error "Backlight breathing is not available for software PWM. Please disable."
#endif
static uint16_t s_duty_pattern = 0;
// clang-format off
/** \brief PWM duty patterns
*
* We scale the current backlight level to an index within this array. This allows
* backlight_task to focus on just switching LEDs on/off, and we can predict the duty pattern
*/
static const uint16_t backlight_duty_table[] = {
0b0000000000000000,
0b1000000000000000,
0b1000000010000000,
0b1000001000010000,
0b1000100010001000,
0b1001001001001000,
0b1010101010101010,
0b1110111011101110,
0b1111111111111111,
};
#define backlight_duty_table_size (sizeof(backlight_duty_table) / sizeof(backlight_duty_table[0]))
// clang-format on
static uint8_t scale_backlight(uint8_t v) { return v * (backlight_duty_table_size - 1) / BACKLIGHT_LEVELS; }
void backlight_init_ports(void) { backlight_pins_init(); }
void backlight_set(uint8_t level) { s_duty_pattern = backlight_duty_table[scale_backlight(level)]; }
void backlight_task(void) {
static uint8_t backlight_tick = 0;
if (s_duty_pattern & ((uint16_t)1 << backlight_tick)) {
backlight_pins_on();
} else {
backlight_pins_off();
}
backlight_tick = (backlight_tick + 1) % 16;
}