Th3maz1ng/W800_Smart_Watch
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Fixed an issue when sending commands to the LCD screen while a DMA

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transfer is in progress causing graphical issues
Detail :
A DMA transfer may be in progress when trying to send single byte commands to the LCD screen. This could badly configure the display as soon as the data/command select pin was set to command while the DMA was still sending data bytes.
The fix : doing a busy wait in the lcd_set_data function to be sure the bus is free to use.
This commit is contained in:
anschrammh 2023-03-30 13:04:04 +02:00
parent a58c453f58
commit 2b79a31165
1 changed files with 3 additions and 1 deletions
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4
src/W800_SDK_v1.00.10/app/app_drivers/lcd/lcd.c
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@ -382,7 +382,6 @@ void lcd_set_backlight(LCDConfig_t * const LCDConfig, uint8_t brightness)
tls_gpio_cfg(LCDConfig->LCDPWMBacklightPin, WM_GPIO_DIR_OUTPUT, WM_GPIO_ATTR_FLOATING);
tls_gpio_write(LCDConfig->LCDPWMBacklightPin, 0);
}
}
void lcd_hardware_reset(LCDConfig_t * const LCDConfig)
@ -523,5 +522,8 @@ static void lcd_set_cs(LCDConfig_t * const LCDConfig, LCDSelect_e selected)
static void lcd_set_data_command(LCDConfig_t * const LCDConfig, LCDDataCommand_e dataCommand)
{
// We wait for the mmc sdio driver to be ready before changing the LCD access mode
mmc_sdio_driver_blocking_wait_bus_free();
tls_gpio_write(LCDConfig->LCDDataCommandPin, dataCommand);
}