causes a 50-200ms pause on the UART TX in the middle of the transmission?
Yes,the following processing is implemented, causing a pause of 50 to 200 milliseconds during transfer.
The task running this process has the highest priority.
Code: Select all
uart_write_bytes(UART_NUM_1, buffer, 200);
Maybe I'm doing something wrong.
Sending 500 bytes, without any intervals.
For example, a screenshot from the analyzer - 120-140 characters.
Code: Select all
static const int RX_BUF_SIZE = 1024;
static const int RX_DATA_SIZE = 550;
static const int TX_DATA_SIZE = 500;
// esp32s3 free pin
#define TXD_PIN (GPIO_NUM_1)
#define RXD_PIN (GPIO_NUM_2)
void init(void)
{
const uart_config_t uart_config = {
.baud_rate = 115200,
.data_bits = UART_DATA_8_BITS,
.parity = UART_PARITY_DISABLE,
.stop_bits = UART_STOP_BITS_1,
.flow_ctrl = UART_HW_FLOWCTRL_DISABLE,
.source_clk = UART_SCLK_DEFAULT,
};
// We won't use a buffer for sending data.
uart_driver_install(UART_NUM_1, RX_BUF_SIZE * 2, 0, 0, NULL, 0);
uart_param_config(UART_NUM_1, &uart_config);
uart_set_pin(UART_NUM_1, TXD_PIN, TXD_PIN, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
// connect RX & TX pin without wire, reeset tx connection
gpio_set_direction(TXD_PIN, GPIO_MODE_INPUT_OUTPUT);
esp_rom_gpio_connect_out_signal(TXD_PIN, UART_PERIPH_SIGNAL(UART_NUM_1, SOC_UART_TX_PIN_IDX), 0, 0);
}
static void tx_task(void *arg)
{
static const char *TX_TASK_TAG = "TX_TASK";
uint8_t* data_txd = (uint8_t*) calloc(TX_DATA_SIZE + 1,1);
//memset(data_txd, 0x55, TX_DATA_SIZE);
esp_log_level_set(TX_TASK_TAG, ESP_LOG_INFO);
while (1) {
const int txBytes = uart_write_bytes(UART_NUM_1, data_txd, TX_DATA_SIZE);
ESP_LOGI("UART_TX_TASK", "Wrote %d bytes", txBytes);
vTaskDelay(2000 / portTICK_PERIOD_MS);
}
}
static void rx_task(void *arg)
{
static const char *RX_TASK_TAG = "RX_TASK";
esp_log_level_set(RX_TASK_TAG, ESP_LOG_INFO);
uint8_t* data = (uint8_t*) malloc(RX_DATA_SIZE + 1);
while (1) {
const int rxBytes = uart_read_bytes(UART_NUM_1, data, RX_DATA_SIZE, 1000 / portTICK_PERIOD_MS);
if (rxBytes > 0) {
data[rxBytes] = 0;
ESP_LOGI(RX_TASK_TAG, "Read %d bytes", rxBytes);
}
}
free(data);
}
void app_main(void)
{
//logic_analyzer_cli();
init();
xTaskCreate(rx_task, "uart_rx_task", 1024 * 4, NULL, 5, NULL);
xTaskCreate(tx_task, "uart_tx_task", 1024 * 4, NULL, 5, NULL);
}
- uart.JPG (95.92 KiB) Viewed 2401 times