/******************************************************************************
* FunctionName : uart0_rx_intr_handler
* Description : Internal used function
* UART0 interrupt handler, add self handle code inside
* Parameters : void *para - point to ETS_UART_INTR_ATTACH's arg
* Returns : NONE
*******************************************************************************/
static void // must not use ICACHE_FLASH_ATTR !
uart0_rx_intr_handler(void *para)
{
// we assume that uart1 has interrupts disabled (it uses the same interrupt vector)
uint8 uart_no = UART0;
const uint32 one_sec = 1000000; // one second in usecs
// we end up largely ignoring framing errors and we just print a warning every second max
if (READ_PERI_REG(UART_INT_RAW(uart_no)) & UART_FRM_ERR_INT_RAW) {
uint32 now = system_get_time();
if (last_frm_err == 0 || (now - last_frm_err) > one_sec) {
os_printf("UART framing error (bad baud rate?)\n");
last_frm_err = now;
}
// clear rx fifo (apparently this is not optional at this point)
SET_PERI_REG_MASK(UART_CONF0(uart_no), UART_RXFIFO_RST);
CLEAR_PERI_REG_MASK(UART_CONF0(uart_no), UART_RXFIFO_RST);
// reset framing error
WRITE_PERI_REG(UART_INT_CLR(UART0), UART_FRM_ERR_INT_CLR);
// once framing errors are gone for 10 secs we forget about having seen them
} else if (last_frm_err != 0 && (system_get_time() - last_frm_err) > 10*one_sec) {
last_frm_err = 0;
}
if (UART_RXFIFO_FULL_INT_ST == (READ_PERI_REG(UART_INT_ST(uart_no)) & UART_RXFIFO_FULL_INT_ST)
|| UART_RXFIFO_TOUT_INT_ST == (READ_PERI_REG(UART_INT_ST(uart_no)) & UART_RXFIFO_TOUT_INT_ST))
{
//DBG_UART("stat:%02X",*(uint8 *)UART_INT_ENA(uart_no));
ETS_UART_INTR_DISABLE();
post_usr_task(uart_recvTaskNum, 0);
}
}
void esp_uart_print_status(void *arg) {
struct esp_uart_state *us = (struct esp_uart_state *) arg;
struct esp_uart_stats *s = &us->stats;
struct esp_uart_stats *ps = &us->prev_stats;
int uart_no = us->cfg->uart_no;
fprintf(
stderr,
"UART%d ints %u/%u/%u; rx en %d bytes %u buf %u fifo %u, ovf %u, lcs %u; "
"tx %u %u %u, thr %u; hf %u i 0x%03x ie 0x%03x cts %d\n",
uart_no, s->ints - ps->ints, s->rx_ints - ps->rx_ints,
s->tx_ints - ps->tx_ints, us->rx_enabled, s->rx_bytes - ps->rx_bytes,
us->rx_buf.used, rx_fifo_len(us->cfg->uart_no),
s->rx_overflows - ps->rx_overflows,
s->rx_linger_conts - ps->rx_linger_conts, s->tx_bytes - ps->tx_bytes,
us->tx_buf.used, tx_fifo_len(us->cfg->uart_no),
s->tx_throttles - ps->tx_throttles, system_get_free_heap_size(),
READ_PERI_REG(UART_INT_RAW(uart_no)),
READ_PERI_REG(UART_INT_ENA(uart_no)), cts(uart_no));
memcpy(ps, s, sizeof(*s));
}
uint32_t esp_uart_raw_ints(int uart_no) {
return READ_PERI_REG(UART_INT_RAW(uart_no));
}