sascha/esphome
1
0
Fork 0
mirror of https://github.com/esphome/esphome.git synced 2025-10-30 22:53:59 +00:00
Code Issues Releases Wiki Activity

wip

Browse Source
This commit is contained in:
J. Nick Koston
2025-09-23 21:28:14 -05:00
parent ce784299d8
commit 4699e56832
1 changed files with 6 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
esphome/components/usb_uart/usb_uart.h
View File

@@ -115,17 +115,12 @@ class USBUartChannel : public uart::UARTComponent, public Parented<USBUartCompon
class USBUartComponent : public usb_host::USBClient {
public:
USBUartComponent(uint16_t vid, uint16_t pid) : usb_host::USBClient(vid, pid) {
// Allocate pool of data chunks
// Allocate pool of data chunks (never freed - ESPHome reboots instead)
for (int i = 0; i < MAX_DATA_CHUNKS; i++) {
this->data_chunk_pool_[i] = new UsbDataChunk();
this->free_chunks_.push(this->data_chunk_pool_[i]);
}
}
~USBUartComponent() {
for (int i = 0; i < MAX_DATA_CHUNKS; i++) {
delete this->data_chunk_pool_[i];
}
}
void setup() override;
void loop() override;
void dump_config() override;
@@ -137,14 +132,17 @@ class USBUartComponent : public usb_host::USBClient {
void start_output(USBUartChannel *channel);
// Lock-free data transfer from USB task to main loop
LockFreeQueue<UsbDataChunk, 32> usb_data_queue_;
static constexpr int USB_DATA_QUEUE_SIZE = 32;
LockFreeQueue<UsbDataChunk, USB_DATA_QUEUE_SIZE> usb_data_queue_;
protected:
std::vector<USBUartChannel *> channels_{};
// Pool of pre-allocated data chunks to avoid dynamic allocation
static constexpr int MAX_DATA_CHUNKS = 32;
static constexpr int MAX_DATA_CHUNKS = 40;
UsbDataChunk *data_chunk_pool_[MAX_DATA_CHUNKS];
// IMPORTANT: This is used bidirectionally (USB task pops, main loop pushes)
// which technically violates SPSC, but works in practice because operations are atomic
LockFreeQueue<UsbDataChunk, MAX_DATA_CHUNKS> free_chunks_;
};