Michal
/
esphome_elektromer_han
mirror of https://github.com/Tomer27cz/xt211.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Improve UART locking and fallback read logic 

Refactored XT211Uart to handle cases where the lock is not initialized, preventing null dereference. Added fallback to base read_array for non-hardware UARTs in read_array_quick_, improving compatibility with BLE-backed UARTs.
uart_fix
Tomer27cz 2026-01-23 21:04:55 +01:00
parent 81b71206a6
commit ce199326a1
1 changed files with 32 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
components/xt211/xt211_uart.h
View File

@ -85,13 +85,19 @@ class XT211Uart final : public uart::ESP8266UartComponent {
class XT211Uart final : public uart::IDFUARTComponent {
public:
XT211Uart(uart::IDFUARTComponent &uart)
: uart_(uart), iuart_num_(uart.*(&XT211Uart::uart_num_)), ilock_(uart.*(&XT211Uart::lock_)) {}
: uart_(uart), iuart_num_(uart.*(&XT211Uart::uart_num_)) {}
// Reconfigure baudrate
void update_baudrate(uint32_t baudrate) {
xSemaphoreTake(ilock_, portMAX_DELAY);
uart_set_baudrate(iuart_num_, baudrate);
xSemaphoreGive(ilock_);
auto &lock = uart_.*(&XT211Uart::lock_);
if (lock != nullptr) {
xSemaphoreTake(lock, portMAX_DELAY);
uart_set_baudrate(iuart_num_, baudrate);
xSemaphoreGive(lock);
} else {
// Lock not initialized yet, just set baudrate without locking
uart_set_baudrate(iuart_num_, baudrate);
}
}
bool read_one_byte(uint8_t *data) { return read_array_quick_(data, 1); }
@ -115,23 +121,40 @@ class XT211Uart final : public uart::IDFUARTComponent {
size_t length_to_read = len;
if (!this->check_read_timeout_quick_(len))
return false;
xSemaphoreTake(this->ilock_, portMAX_DELAY);
auto &lock = uart_.*(&XT211Uart::lock_);
bool locked = false;
if (lock != nullptr) {
xSemaphoreTake(lock, portMAX_DELAY);
locked = true;
}
if (this->has_peek_) {
length_to_read--;
*data = this->peek_byte_;
data++;
this->has_peek_ = false;
}
if (length_to_read > 0)
uart_read_bytes(this->iuart_num_, data, length_to_read, 20 / portTICK_PERIOD_MS);
xSemaphoreGive(this->ilock_);
if (length_to_read > 0) {
// If no valid hardware UART, fall back to base read_array (e.g., BLE-backed UART)
if (this->iuart_num_ < UART_NUM_0 || this->iuart_num_ >= UART_NUM_MAX) {
if (!uart_.read_array(data, length_to_read)) {
return false;
}
} else {
uart_read_bytes(this->iuart_num_, data, length_to_read, 20 / portTICK_PERIOD_MS);
}
}
if (locked) {
xSemaphoreGive(lock);
}
return true;
}
uart::IDFUARTComponent &uart_;
uart_port_t iuart_num_;
SemaphoreHandle_t &ilock_;
};
#endif