AliOS Things Developer Kit UART Operation Demo

Developer Kit Hardware

Development Environment

Prerequisites

Introduction to UART

Source Code

#define UART_DATA_BYTES 14uart_dev_t opt_uart;
char readbuf[UART_DATA_BYTES] = {0};
static void init_uart(void)
{
opt_uart.port = 2;
opt_uart.config.baud_rate = 115200;
opt_uart.config.data_width = DATA_WIDTH_8BIT;
opt_uart.config.flow_control = FLOW_CONTROL_DISABLED;
opt_uart.config.mode = MODE_TX_RX;
opt_uart.config.parity = NO_PARITY;
opt_uart.config.stop_bits = STOP_BITS_1;
hal_uart_init(&opt_uart);
}
static void app_delayed_action(void *arg)
{
uint32_t recBytes = 0;
int ret = -1;
LOG("Uart opertion demo %s:%d %s\r\n", __func__, __LINE__, aos_task_name()); init_uart();

LOG("Uart init finished %s:%d %s\r\n", __func__, __LINE__, aos_task_name());
/* receive a message and sent out through the uart */
ret = hal_uart_recv_II(&opt_uart, readbuf, UART_DATA_BYTES, &recBytes, 10);
LOG("Uart receive finished %s:%d %s\r\n", __func__, __LINE__, aos_task_name()); if((ret == 0) && (recBytes > 0))
{
LOG("Read something %s:%d %s\r\n", __func__, __LINE__, aos_task_name());
hal_uart_send(&opt_uart, readbuf, recBytes, 10);
} else {
LOG("Read none %s:%d %s\r\n", __func__, __LINE__, aos_task_name());
}
aos_post_delayed_action(500, app_delayed_action, NULL);
}

Debugging

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