From d65a4b3f97e85d59af26d4679a02455b5e3de15c Mon Sep 17 00:00:00 2001 From: Akshai M Date: Wed, 2 Dec 2020 15:56:32 +0100 Subject: [PATCH] drivers/ili9341 : Update documentation --- drivers/include/ili9341.h | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/include/ili9341.h b/drivers/include/ili9341.h index 1951966f3f..06e8ae7876 100644 --- a/drivers/include/ili9341.h +++ b/drivers/include/ili9341.h @@ -52,7 +52,8 @@ extern "C" { /** * @brief ILI9341 gvdd level. * - * Default GVDD voltage of 4.8V + * Default GVDD voltage of 4.8V. GVDD is reference level for the VCOM level and + * the grayscale voltage level. GVDD should be ≦ (AVDD - 0.5) V . */ #ifndef CONFIG_ILI9341_GVDD #define CONFIG_ILI9341_GVDD 4800 @@ -61,7 +62,10 @@ extern "C" { /** * @brief ILI9341 VCOMH voltage level. * - * Default VCOMH voltage of 4.25V + * Default VCOMH voltage of 4.25V. VCOMH represents the high level of VCOM AC + * voltage. VCOM levels needs to be adjusted to match the capacitance and + * performance specifications of the TFT panel to maximize contrast and minimize + * flickering. */ #ifndef CONFIG_ILI9341_VCOMH #define CONFIG_ILI9341_VCOMH 4250 @@ -70,7 +74,10 @@ extern "C" { /** * @brief ILI9341 VCOML voltage level. * - * Default VCOMH voltage of -2V + * Default VCOML voltage of -2V. VCOML represents the low level of VCOM AC + * voltage. VCOM levels needs to be adjusted to match the capacitance and + * performance specifications of the TFT panel to maximize contrast and minimize + * flickering */ #ifndef CONFIG_ILI9341_VCOML #define CONFIG_ILI9341_VCOML -2000