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starting with commands

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This commit is contained in:
Adolfo Reyna
2025-12-09 18:30:42 -05:00
parent b200ba075b
commit bc0e082b89
2 changed files with 112 additions and 17 deletions
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57
hello_usb.cpp
View File

@@ -371,6 +371,29 @@ static inline bool find_key_in_report(hid_keyboard_report_t const *report, uint8
return false;
}
static bool process_command(const char* input) {
if (input[0] != '/') return false;
if (strcmp(input, "/refresh") == 0) {
printf("Command: /refresh\n");
g_force_full_refresh = true;
send_display_update("", false);
return true;
} else if (strcmp(input, "/clear") == 0) {
printf("Command: /clear\n");
g_entry_list.count = 0;
memset(g_entry_list.entries, 0, sizeof(g_entry_list.entries));
g_force_full_refresh = true;
send_display_update("", false);
return true;
} else if (strcmp(input, "/wifisetup") == 0) {
printf("Command: /wifisetup (Not implemented)\n");
return true;
}
return false;
}
static void process_kbd_report(hid_keyboard_report_t const *report) {
static hid_keyboard_report_t prev_report = { 0, 0, {0} };
@@ -403,6 +426,16 @@ static void process_kbd_report(hid_keyboard_report_t const *report) {
} else if (is_enter) {
printf("\n");
if (process_command(g_input_buffer)) {
// Command handled, clear buffer but don't commit line
g_buffer_index = 0;
g_input_buffer[0] = '\0';
if (g_display_manager) {
g_display_manager->set_last_echo("Command Executed");
g_display_manager->refresh("", "Command Executed");
}
} else {
// Update e-Paper (commit line)
send_display_update(g_input_buffer, true);
@@ -419,6 +452,7 @@ static void process_kbd_report(hid_keyboard_report_t const *report) {
g_display_manager->set_last_echo(g_last_echo);
g_display_manager->refresh("", g_last_echo);
}
}
} else if (is_printable) {
printf("%c", ch);
if (g_buffer_index < MAX_INPUT_LEN - 1) {
@@ -443,12 +477,25 @@ static void process_kbd_report(hid_keyboard_report_t const *report) {
// TinyUSB Callbacks
//--------------------------------------------------------------------+
static bool g_keyboard_mounted = false;
// Invoked when device is suspended
void tuh_device_suspend_cb(uint8_t dev_addr) {
printf("Device address = %d suspended\r\n", dev_addr);
}
// Invoked when device is resumed
void tuh_device_resume_cb(uint8_t dev_addr) {
printf("Device address = %d resumed\r\n", dev_addr);
}
void tuh_hid_mount_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* desc_report, uint16_t desc_len) {
printf("HID device address = %d, instance = %d is mounted\r\n", dev_addr, instance);
uint8_t const itf_protocol = tuh_hid_interface_protocol(dev_addr, instance);
if (itf_protocol == HID_ITF_PROTOCOL_KEYBOARD) {
printf("Keyboard mounted\r\n");
g_keyboard_mounted = true;
if (g_display_manager) {
g_display_manager->refresh("Keyboard Connected", nullptr);
}
@@ -460,8 +507,14 @@ void tuh_hid_mount_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* desc_re
void tuh_hid_umount_cb(uint8_t dev_addr, uint8_t instance) {
printf("HID device address = %d, instance = %d is unmounted\r\n", dev_addr, instance);
g_keyboard_mounted = false;
// Reset input buffer
g_buffer_index = 0;
g_input_buffer[0] = '\0';
if (g_display_manager) {
g_display_manager->refresh("Keyboard Disconnected", nullptr);
g_display_manager->refresh("Waiting for Keyboard", nullptr);
}
}
@@ -503,7 +556,7 @@ int main() {
uint32_t now = to_ms_since_boot(get_absolute_time());
if (now - last_print > 5000) {
printf("Heartbeat: %u\n", now);
printf("Heartbeat: %u, Mounted: %d\n", now, g_keyboard_mounted);
last_print = now;
}
}

42
suspend_fix_notes.md Normal file
View File

@@ -0,0 +1,42 @@
# TinyUSB Host Keyboard Suspend/Freeze Issues on RP2040
## Common Issues
1. **Device Auto-Suspend:** Some keyboards automatically enter a low-power suspend mode if they don't detect activity or if the host stops sending Start-Of-Frame (SOF) packets.
2. **Host Controller Freeze:** The RP2040 USB host controller can sometimes get into a state where it stops processing events, especially if there are signal integrity issues or if the `tuh_task()` is blocked for too long.
3. **Missing Keep-Alive:** If the host doesn't send SOFs, the device will suspend. The RP2040 host should send SOFs automatically when configured as host.
## `tuh_task` Usage
- **Requirement:** `tuh_task()` must be called continuously and frequently in the main loop.
- **Blocking:** It should not be blocked by long delays (like `sleep_ms` or blocking display updates) in the same thread.
- **Current Code:** Your `hello_usb.cpp` calls `tuh_task()` in a tight loop, which is correct. The display updates are offloaded to Core 1, and the FIFO push is non-blocking (checked with `multicore_fifo_wready`), so Core 0 should remain responsive.
## Potential Fixes & Debugging
### 1. Handle Suspend/Resume Callbacks
TinyUSB provides callbacks to notify the application when a device suspends or resumes. Implementing these can help determine if the device is actually suspending.
Add these to your `hello_usb.cpp`:
```cpp
// Invoked when device is suspended
void tuh_device_suspend_cb(uint8_t dev_addr) {
printf("Device address = %d suspended\r\n", dev_addr);
}
// Invoked when device is resumed
void tuh_device_resume_cb(uint8_t dev_addr) {
printf("Device address = %d resumed\r\n", dev_addr);
}
```
### 2. Force Resume
If the device suspends and doesn't wake up, you might need to force a resume from the host side, although usually the device initiates resume (remote wakeup) or the host keeps it awake.
### 3. Check Power
Ensure the keyboard is receiving sufficient power. Some mechanical keyboards with LEDs draw significant current, potentially causing voltage drops that reset the USB connection or cause a freeze.
### 4. Disable Suspend (Device Side)
Some devices have internal settings to disable sleep, but this is device-specific.
### 5. SDK/TinyUSB Version
Ensure you are using a recent version of the Pico SDK and TinyUSB, as there have been fixes for RP2040 host mode stability.