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Fix input acquisition bug on MD-3x0

replace/fa12002849c356cd4e227d5c1b6f2f759abac03b
Niccolò Izzo 2021-02-01 18:51:21 +01:00
rodzic 88387ee00d
commit ceb109946e
1 zmienionych plików z 25 dodań i 3 usunięć
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28
platform/drivers/keyboard/keyboard_MDx.c
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@ -64,11 +64,33 @@ keyboard_t kbd_getKeys()
old_pos = new_pos;
}
/*
* First of all, configure the row lines as inputs. Since they are in common
* with the display, their configuration can have been screwed up by display
* driver among two subsequent calls of this function.
* The row lines are in common with the display, so we have to configure
* them as inputs before scanning. However, before configuring them as inputs,
* we put them as outputs and force a low logical level in order to be sure
* that any residual charge on both the display controller's inputs and in
* the capacitors in parallel to the Dx lines is dissipated.
*/
gpio_setMode(LCD_D0, OUTPUT);
gpio_setMode(LCD_D1, OUTPUT);
gpio_setMode(LCD_D2, OUTPUT);
gpio_setMode(LCD_D3, OUTPUT);
gpio_setMode(LCD_D4, OUTPUT);
gpio_setMode(LCD_D5, OUTPUT);
gpio_setMode(LCD_D6, OUTPUT);
gpio_setMode(LCD_D7, OUTPUT);
gpio_clearPin(LCD_D0);
gpio_clearPin(LCD_D1);
gpio_clearPin(LCD_D2);
gpio_clearPin(LCD_D3);
gpio_clearPin(LCD_D4);
gpio_clearPin(LCD_D5);
gpio_clearPin(LCD_D6);
gpio_clearPin(LCD_D7);
gpio_setMode(LCD_D0, INPUT_PULL_DOWN);
gpio_setMode(LCD_D1, INPUT_PULL_DOWN);
gpio_setMode(LCD_D2, INPUT_PULL_DOWN);