readline / writeline interface based on periph/uart

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1

hi,

is there any readline /writeline implementation based on the asynchronous periph/uart implementation?

I want to use the uart in a arduino style and I miss an (blocking) interface like:

  char buf[100];   int buf_size = 100;   int timeout = 100; //ms   int num_of_bytes = readline(uart, buf, buf_size, timeout);

also

  int num_of_bytes_written = writeline(uart, line, line_len, timeout);

Best Christian

2

Hi Christian,

as far as I know it's not in riot directly, but you coult implement it in a couple of lines (simplified -> no error handling...):

char buf[100]; int num_of_bytes = readline_stdin(buf, sizeof(buf)); OR int num_of_bytes = readline(UART_x, buf, sizeof(buf);

int readline_stdin(char *buf, int size) { int i = 0; char c; do {      c = getchar(); /** part of stdio.h */      buf[i++] = c; } while (c == '\n'); return i; }

int readline(uart_t uart, char *buf, int size) { int i = 0; char c; do {      uart_read_blocking(uart, &c);      buf[i++] = c; } while (c != '\n'); return i; }

same for writing...

Cheers, Hauke

3

Oh, forgot -> have a look at the system call _read and _write implementations (e.g. for the stm32f0), for the case UART0 is not defined, there you got a pretty good template how to implement some read/writeline features without using the uart_x_blocking functions....

Cheers, Hauke