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Autodetect lack of screen presence

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This is the simplest, most efficient way I could come up with to silence
the "Failed to start write 60" error that occurs when QMK tries to talk
to a screen that doesn't exist.

iota_gfx_init passes a success boolean. We catch that into a global bool
(we could rewrite multiple functions to pass this as an argument, but
given the number of keyboards using this code it seemed less disruptive
this way) and then use that as a conditional on running the
iota_gfx_task in matrix_scan_user.

Tl;dr: if the screen doesn't init, the screen write code doesn't run.
This commit is contained in:
TerryMathews 2018-08-26 13:12:41 -04:00 committed by Jack Humbert
parent 972388447b
commit d12d058bae
2 changed files with 16 additions and 4 deletions
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10
keyboards/tkc1800/keymaps/default/keymap.c
View file

@ -34,6 +34,8 @@ enum {
FUNCTION, FUNCTION,
}; };
bool screenWorks = 0;
//13 characters max without re-writing the "Layer: " format in iota_gfx_task_user() //13 characters max without re-writing the "Layer: " format in iota_gfx_task_user()
static char layer_lookup[][14] = {"Base","Function"}; static char layer_lookup[][14] = {"Base","Function"};
@ -93,7 +95,9 @@ void matrix_init_user(void) {
// calls code for the SSD1306 OLED // calls code for the SSD1306 OLED
_delay_ms(400); _delay_ms(400);
TWI_Init(TWI_BIT_PRESCALE_1, TWI_BITLENGTH_FROM_FREQ(1, 800000)); TWI_Init(TWI_BIT_PRESCALE_1, TWI_BITLENGTH_FROM_FREQ(1, 800000));
iota_gfx_init(); // turns on the display if(iota_gfx_init()){ // turns on the display
screenWorks = 1;
}
#endif #endif
#endif #endif
#ifdef AUDIO_ENABLE #ifdef AUDIO_ENABLE
@ -103,7 +107,9 @@ void matrix_init_user(void) {
void matrix_scan_user(void) { void matrix_scan_user(void) {
#ifdef SSD1306OLED #ifdef SSD1306OLED
iota_gfx_task(); // this is what updates the display continuously if(screenWorks){
iota_gfx_task(); // this is what updates the display continuously
};
#endif #endif
} }

10
keyboards/tkc1800/keymaps/wkl/keymap.c
View file

@ -34,6 +34,8 @@ enum {
FUNCTION, FUNCTION,
}; };
bool screenWorks = 0;
//13 characters max without re-writing the "Layer: " format in iota_gfx_task_user() //13 characters max without re-writing the "Layer: " format in iota_gfx_task_user()
static char layer_lookup[][14] = {"Base","Function"}; static char layer_lookup[][14] = {"Base","Function"};
@ -93,7 +95,9 @@ void matrix_init_user(void) {
// calls code for the SSD1306 OLED // calls code for the SSD1306 OLED
_delay_ms(400); _delay_ms(400);
TWI_Init(TWI_BIT_PRESCALE_1, TWI_BITLENGTH_FROM_FREQ(1, 800000)); TWI_Init(TWI_BIT_PRESCALE_1, TWI_BITLENGTH_FROM_FREQ(1, 800000));
iota_gfx_init(); // turns on the display if(iota_gfx_init()){ // turns on the display
screenWorks = 1;
}
#endif #endif
#endif #endif
#ifdef AUDIO_ENABLE #ifdef AUDIO_ENABLE
@ -103,7 +107,9 @@ void matrix_init_user(void) {
void matrix_scan_user(void) { void matrix_scan_user(void) {
#ifdef SSD1306OLED #ifdef SSD1306OLED
iota_gfx_task(); // this is what updates the display continuously if(screenWorks){
iota_gfx_task(); // this is what updates the display continuously
};
#endif #endif
} }