static int f_uwrite(int uart, char* data) {
if (_argc != 2 || !IS_STRING(data)) {
return -1;
}
if (uart < 0 || uart >= CONFIG_UART_CNT) {
return -1;
}
char c;
while ((c = *data++) != 0) {
UART_put_char(_UART(uart), c);
}
return 0;
}
s32_t UART_put_buf(uart *u, u8_t* c, u16_t len) {
if (UART_ALWAYS_SYNC_TX || u->sync_tx) {
u16_t tlen = len;
while (tlen-- > 0) {
UART_put_char(u, *c++);
}
return len;
} else {
u32_t written = 0;
u16_t guard = 0;
do {
u16_t avail = UART_tx_available(u);
s32_t len_to_write = MIN(len - written, avail);
guard++;
if (len_to_write == 0) {
while (UART_CHECK_TX(u) == 0)
;
len_to_write = 1;
}
guard = 0;
u32_t remaining = len_to_write;
u32_t len_to_end = UART_TX_BUFFER - u->tx.wix;
if (remaining > len_to_end) {
memcpy(&u->tx.buf[u->tx.wix], c, len_to_end);
c += len_to_end;
remaining -= len_to_end;
u->tx.wix = 0;
}
memcpy(&u->tx.buf[u->tx.wix], c, remaining);
c += remaining;
u->tx.wix += remaining;
if (u->tx.wix >= UART_RX_BUFFER) {
u->tx.wix = 0;
}
UART_SET_TX_IRQ_ON(u);
written += len_to_write;
} while (u->assure_tx && written < len && guard < 0xff);
return written;
}
}
