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echoplayer: add charger detection and USB current limit setting

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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
This commit is contained in:
Aidan MacDonald 2026-01-13 13:57:34 +00:00 • committed by Solomon Peachy
parent cd20bc7d16
commit bc32d43c17
2 changed files with 21 additions and 5 deletions
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4
firmware/export/config/echor1.h
View file

@ -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

22
firmware/target/arm/stm32/echoplayer/power-echoplayer.c
View file

@ -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)