echoplayer: add charger detection and USB current limit setting
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commit bc32d43c17aaa793a7ec933304b9b1a004168184 Author: Aidan MacDonald <[email protected]> Date: Tue Jan 13 13:57:34 2026 +0000 echoplayer: add charger detection and USB current limit setting Note that USB current limiting is more or less wishful thinking; only the charge current is limited, but the system could easily draw more than 100 mA by itself. Change-Id: I1083b015f0abea5a39a602ca8d7b142d3613b46b diff --git a/firmware/export/config/echor1.h b/firmware/export/config/echor1.h index 3316b2b731..6a6bba342f 100644 --- a/firmware/export/config/echor1.h +++ b/firmware/export/config/echor1.h @@ -108,9 +108,7 @@ #define USB_PRODUCT_ID 0xEC01 #define USB_DEVBSS_ATTR __attribute__((aligned(32))) #define HAVE_USB_POWER -//#define HAVE_USB_CHARGING_ENABLE -//#define HAVE_USB_CHARGING_IN_THREAD -//#define TARGET_USB_CHARGING_DEFAULT USB_CHARGING_FORCE +#define HAVE_USB_CHARGING_ENABLE #define HAVE_BOOTLOADER_USB_MODE #endif diff --git a/firmware/target/arm/stm32/echoplayer/power-echoplayer.c b/firmware/target/arm/stm32/echoplayer/power-echoplayer.c index 7e4b2e78a3..667cd99731 100644 --- a/firmware/target/arm/stm32/echoplayer/power-echoplayer.c +++ b/firmware/target/arm/stm32/echoplayer/power-echoplayer.c @@ -25,6 +25,7 @@ static struct mutex power_1v8_lock; static int power_1v8_refcount; +/* TODO: calibrate battery curve */ unsigned short battery_level_disksafe = 3500; unsigned short battery_level_shutoff = 3400; @@ -87,14 +88,31 @@ void system_reboot(void) power_off(); } +#ifdef HAVE_USB_CHARGING_ENABLE +void usb_charging_maxcurrent_change(int maxcurrent) +{ + const int conf_500ma = GPIOF_OUTPUT(0, GPIO_TYPE_PUSH_PULL, + GPIO_SPEED_LOW, GPIO_PULL_DISABLED); + const int conf_100ma = GPIOF_INPUT(GPIO_PULL_DISABLED); + + if (maxcurrent > 100) + gpio_configure_single(GPIO_CHARGER_CHARGING, conf_500ma); + else + gpio_configure_single(GPIO_CHARGER_CHARGING, conf_100ma); +} +#endif + unsigned int power_input_status(void) { - return POWER_INPUT_USB_CHARGER; + if (gpio_get_level(GPIO_USB_VBUS)) + return POWER_INPUT_USB_CHARGER; + + return POWER_INPUT_NONE; } bool charging_state(void) { - return true; + return gpio_get_level(GPIO_CHARGER_CHARGING) == 0; } int _battery_voltage(void) -- rockbox-cvs mailing list [email protected] https://lists.haxx.se/mailman/listinfo/rockbox-cvs