[参考译文] LAUNCHCC3220MODASF：UART 初始化以及处理 CC3220MODASF Launchpad 上 GSM 调制解调器的大响应

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https://e2e.ti.com/support/wireless-connectivity/wi-fi-group/wifi/f/wi-fi-forum/1391695/launchcc3220modasf-uart-initialization-and-handling-large-responses-from-gsm-modem-on-cc3220modasf-launchpad

器件型号：LAUNCHCC3220MODASF

工具与软件：

尊敬的 TI 技术团队：

我使用的是 CC3220MODASF launchpad、并且尝试使用 AT 命令与 GSM 调制解调器进行通信。我的问题是、当 GSM 调制解调器的响应是一个大字符串时、如何初始化 UART 并处理读取？

下面是针对 GSM 的 UART 初始化

uart_init()；

UART_Params_init (&uartParams)；
uartParams.writeDataMode = UART_DATA_BINARY；
uartParams.readDataMode = UART_DATA_BINARY；
uartParams.readReturnMode = UART_RETURN_FULL；
uartParams.readEcho = uart_echo_off；
uartParams.baudrate = 115200；
uartParams.readTimeout = UART_WAIT_FOREVER；// 500
GSM_UART= UART_OPEN (CONFIG_UART_1、&uartParams)；

if (GSM_UART => NULL)｛
// uart_open()失败
while (1)；
}

UART 读取句柄

void printBuffer() {
    buffer[buffer_index] = '\0'; // Null-terminate the buffer
    //Display_printf(display, 0, 0, "%s", buffer); // Print the buffer as a string
    strcat(UART_READ, buffer);
    buffer_index = 0; // Reset buffer index for next data
}
int readGSMUART(char *output, size_t max_length, int timeout_ms) {
    unsigned long start_time = Timer_getMillis();

    while (Timer_getMillis() - start_time < timeout_ms) {
        if (UART_read(Gsm_uart, &input, 1) > 0) {
            if (input >= 32 && input <= 126) {
                buffer[buffer_index++] = input; // Store the character in the buffer
                if (buffer_index >= MAX_BUFFER_SIZE - 1) {
                    printBuffer();
                }
            } else if (input == '\n' || input == '\r') {
                printBuffer(); // Handle newline or carriage return
                if (strlen(UART_READ) > 0) {
                    // Check if the response is complete (usually by checking for specific patterns or length)
                    if (strstr(UART_READ, "OK") || strstr(UART_READ, "ERROR") || strstr(UART_READ, ">") || (strlen(UART_READ) >= max_length - 1)) {

                        strncpy(output, UART_READ, max_length - 1); // Copy to output
                        output[max_length - 1] = '\0'; // Ensure null-terminated string
                        memset(UART_READ, 0, MAX_BUFFER_SIZE);
                        return 1; // Successfully read response
                    }
                }
            }
        }
    }

    if (strlen(UART_READ) > 0) {
        removeOKFromResponse(UART_READ);
        strncpy(output, UART_READ, max_length - 1); // Copy to output
        output[max_length - 1] = '\0'; // Ensure null-terminated string
        memset(UART_READ, 0, MAX_BUFFER_SIZE);
        return 1; // Successfully read response
    }

    output[0] = '\0'; // In case of timeout or failure
    Display_printf(display, 0, 0, "UART_READ TIMEOUT or FAILURE\n");
    return 0;
}

5 个月前