void esp_sj_uart_dispatcher(void *arg) {
int uart_no = (int) arg;
struct esp_sj_uart_state *us = &sj_us[uart_no];
cs_rbuf_t *txb = esp_uart_tx_buf(uart_no);
us->dispatch_pending = 0;
esp_uart_dispatch_rx_top(uart_no);
uint16_t tx_used_before = txb->used;
/* ignore unused because of CS_DISABLE_JS below */
(void) tx_used_before;
esp_uart_dispatch_tx_top(uart_no);
#ifndef CS_DISABLE_JS
cs_rbuf_t *rxb = esp_uart_rx_buf(uart_no);
if (us->v7 != NULL) {
/* Detect the edge of TX buffer becoming empty. */
if (tx_used_before > 0 && txb->used == 0) {
v7_val_t txcb = v7_get(us->v7, us->obj, "_txcb", 5);
if (v7_is_callable(us->v7, txcb)) {
sj_invoke_cb(us->v7, txcb, us->obj, V7_UNDEFINED);
}
}
if (rxb->used > 0) {
/* Check for JS recv handler. */
v7_val_t rxcb = esp_sj_uart_get_recv_handler(uart_no);
if (v7_is_callable(us->v7, rxcb)) {
if (!us->recv_pending) {
us->recv_pending = 1;
sj_invoke_cb(us->v7, rxcb, us->obj, V7_UNDEFINED);
/* Note: Callback has not run yet, it has been scheduled. */
}
} else if (us->prompt) {
uint8_t *cp;
while (rxb != NULL && cs_rbuf_get(rxb, 1, &cp) == 1) {
char c = (char) *cp;
cs_rbuf_consume(rxb, 1);
sj_prompt_process_char(c);
/* UART could've been re-initialized by the command from prompt. */
rxb = esp_uart_rx_buf(uart_no);
}
}
}
}
#endif
esp_uart_dispatch_bottom(uart_no);
}
static enum v7_err UART_recv(struct v7 *v7, v7_val_t *res) {
struct esp_sj_uart_state *us;
enum v7_err ret = esp_sj_uart_get_state(v7, &us);
if (ret != V7_OK) return ret;
cs_rbuf_t *rxb = esp_uart_rx_buf(us->uart_no);
size_t len = MIN((size_t) v7_to_number(v7_arg(v7, 0)), rxb->used);
uint8_t *data;
len = cs_rbuf_get(rxb, len, &data);
*res = v7_mk_string(v7, (const char *) data, len, 1 /* copy */);
cs_rbuf_consume(rxb, len);
us->recv_pending = 0;
/* This is required to unblock interrupts after buffer has been filled.
* And won't hurt in general. */
esp_sj_uart_schedule_dispatcher(us->uart_no);
return V7_OK;
}
IRAM void miot_uart_dev_dispatch_tx_top(struct miot_uart_state *us) {
int uart_no = us->uart_no;
cs_rbuf_t *txb = &us->tx_buf;
uint32_t txn = 0;
/* TX */
if (txb->used > 0) {
while (txb->used > 0) {
int i;
uint8_t *data;
uint16_t len;
int tx_av = us->cfg->tx_fifo_full_thresh - esp_uart_tx_fifo_len(uart_no);
if (tx_av <= 0) break;
len = cs_rbuf_get(txb, tx_av, &data);
for (i = 0; i < len; i++, data++) {
tx_byte(uart_no, *data);
}
txn += len;
cs_rbuf_consume(txb, len);
}
us->stats.tx_bytes += txn;
}
}
void mgos_uart_hal_dispatch_rx_top(struct mgos_uart_state *us) {
bool recd;
struct cc32xx_uart_state *ds = (struct cc32xx_uart_state *) us->dev_data;
cs_rbuf_t *irxb = &ds->isr_rx_buf;
MAP_UARTIntDisable(ds->base, UART_RX_INTS);
recv_more:
recd = false;
cc32xx_uart_rx_bytes(ds->base, irxb);
while (irxb->used > 0 && mgos_uart_rxb_free(us) > 0) {
int num_recd = 0;
do {
uint8_t *data;
int num_to_get = MIN(mgos_uart_rxb_free(us), irxb->used);
num_recd = cs_rbuf_get(irxb, num_to_get, &data);
mbuf_append(&us->rx_buf, data, num_recd);
cs_rbuf_consume(irxb, num_recd);
us->stats.rx_bytes += num_recd;
if (num_recd > 0) recd = true;
cc32xx_uart_rx_bytes(ds->base, irxb);
} while (num_recd > 0);
}
/* If we received something during this cycle and there is buffer space
* available, "linger" for some more, maybe there's more to come. */
if (recd && mgos_uart_rxb_free(us) > 0 && us->cfg.rx_linger_micros > 0) {
/* Magic constants below are tweaked so that the loop takes at most the
* configured number of microseconds. */
int ctr = us->cfg.rx_linger_micros * 31 / 12;
// HWREG(GPIOA1_BASE + GPIO_O_GPIO_DATA + 8) = 0xFF; /* Pin 64 */
while (ctr-- > 0) {
if (MAP_UARTCharsAvail(ds->base)) {
us->stats.rx_linger_conts++;
goto recv_more;
}
}
// HWREG(GPIOA1_BASE + GPIO_O_GPIO_DATA + 8) = 0; /* Pin 64 */
}
MAP_UARTIntClear(ds->base, UART_RX_INTS);
}