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echoplayer: reduce LCD RGB & SPI output speed

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Low speed works for 50pF loads up to 12 MHz. LCD signals
fall well within those limits so there's no reason to use
any higher speed.

Change-Id: I6dab899fac316bb02572174ef13a98cccbf4ae66
This commit is contained in:
Aidan MacDonald 2026-02-10 15:43:18 +00:00
parent 006859f16b
commit dd21a1d1d9
2 changed files with 5 additions and 10 deletions
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9
firmware/target/arm/stm32/echoplayer/lcd-echoplayer.c
View file

@ -35,13 +35,8 @@
#define MS_TO_TICKS(x) \
(((x) + (1000 / HZ - 1)) / (1000 / HZ))
/*
* ILI9342C specifies 10 MHz max
*
* Use 12MHz for now -- for some reason using 6 MHz doesn't work
* to enable RGB mode, but works fine to send graphics in SPI mode?
*/
#define LCD_SPI_FREQ 12000000
/* ILI9342C specifies 10 MHz max */
#define LCD_SPI_FREQ 10000000
#define ili_cmd(cmd, ...) \
do { \

6
firmware/target/arm/stm32/echoplayer/system-echoplayer.c
View file

@ -44,9 +44,9 @@
#define F_SDMMC1 GPIOF_FUNCTION(12, GPIO_TYPE_PUSH_PULL, GPIO_SPEED_MEDIUM, GPIO_PULL_UP)
#define F_SDMMC1CK GPIOF_FUNCTION(12, GPIO_TYPE_PUSH_PULL, GPIO_SPEED_MEDIUM, GPIO_PULL_DISABLED)
#define F_SAI1 GPIOF_FUNCTION(6, GPIO_TYPE_PUSH_PULL, GPIO_SPEED_VERYHIGH, GPIO_PULL_DISABLED)
#define F_SPI5 GPIOF_FUNCTION(5, GPIO_TYPE_PUSH_PULL, GPIO_SPEED_VERYHIGH, GPIO_PULL_DISABLED)
#define F_LCD_AF14 GPIOF_FUNCTION(14, GPIO_TYPE_PUSH_PULL, GPIO_SPEED_VERYHIGH, GPIO_PULL_DISABLED)
#define F_LCD_AF9 GPIOF_FUNCTION(9, GPIO_TYPE_PUSH_PULL, GPIO_SPEED_VERYHIGH, GPIO_PULL_DISABLED)
#define F_SPI5 GPIOF_FUNCTION(5, GPIO_TYPE_PUSH_PULL, GPIO_SPEED_LOW, GPIO_PULL_DISABLED)
#define F_LCD_AF14 GPIOF_FUNCTION(14, GPIO_TYPE_PUSH_PULL, GPIO_SPEED_LOW, GPIO_PULL_DISABLED)
#define F_LCD_AF9 GPIOF_FUNCTION(9, GPIO_TYPE_PUSH_PULL, GPIO_SPEED_LOW, GPIO_PULL_DISABLED)
#define F_LPTIM4_OUT GPIOF_FUNCTION(3, GPIO_TYPE_PUSH_PULL, GPIO_SPEED_LOW, GPIO_PULL_DISABLED)
#define F_LPTIM1_OUT GPIOF_FUNCTION(1, GPIO_TYPE_PUSH_PULL, GPIO_SPEED_VERYHIGH, GPIO_PULL_DISABLED)