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Merge pull request #10191 from fedepell/at_recv_bytes_1
drivers/at: add function to read raw data bytes from modem
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commit
e13bc4285b
@ -63,6 +63,24 @@ void at_send_bytes(at_dev_t *dev, const char *bytes, size_t len)
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uart_write(dev->uart, (const uint8_t *)bytes, len);
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}
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ssize_t at_recv_bytes(at_dev_t *dev, char *bytes, size_t len, uint32_t timeout)
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{
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char *resp_pos = bytes;
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while (len) {
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int read_res;
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if ((read_res = isrpipe_read_timeout(&dev->isrpipe, resp_pos, 1, timeout)) == 1) {
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resp_pos += read_res;
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len -= read_res;
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}
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else if (read_res == -ETIMEDOUT) {
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break;
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}
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}
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return (resp_pos - bytes);
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}
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int at_send_cmd(at_dev_t *dev, const char *command, uint32_t timeout)
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{
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size_t cmdlen = strlen(command);
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@ -220,6 +220,18 @@ int at_expect_bytes(at_dev_t *dev, const char *bytes, uint32_t timeout);
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*/
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void at_send_bytes(at_dev_t *dev, const char *bytes, size_t len);
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/**
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* @brief Receive raw bytes from a device
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*
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* @param[in] dev device to operate on
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* @param[in] bytes buffer where store received bytes
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* @param[in] len maximum number of bytes to receive
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* @param[in] timeout timeout (in usec) of inactivity to finish read
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*
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* @returns Number of bytes read, eventually zero if no bytes available
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*/
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ssize_t at_recv_bytes(at_dev_t *dev, char *bytes, size_t len, uint32_t timeout);
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/**
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* @brief Send command to device
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*
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@ -105,6 +105,25 @@ static int send_lines(int argc, char **argv)
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return 0;
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}
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static int send_recv_bytes(int argc, char **argv)
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{
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char buffer[64];
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if (argc < 3) {
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printf("Usage: %s <command> <number of bytes>\n", argv[0]);
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return 1;
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}
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sprintf(buffer, "%s%s", argv[1], AT_SEND_EOL);
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at_send_bytes(&at_dev, buffer, strlen(buffer));
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ssize_t len = at_recv_bytes(&at_dev, buffer, atoi(argv[2]), 10 * US_PER_SEC);
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printf("Response (len=%d): %s\n", (int)len, buffer);
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return 0;
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}
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static int drain(int argc, char **argv)
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{
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(void)argc;
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@ -228,6 +247,7 @@ static const shell_command_t shell_commands[] = {
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{ "send", "Send a command and wait response", send },
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{ "send_ok", "Send a command and wait OK", send_ok },
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{ "send_lines", "Send a command and wait lines", send_lines },
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{ "send_recv_bytes", "Send a command and wait response as raw bytes", send_recv_bytes },
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{ "drain", "Drain AT device", drain },
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{ "power_on", "Power on AT device", power_on },
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{ "power_off", "Power off AT device", power_off },
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