esp8266/esp_mphal: Add tentative change to mp_hal_stdin_rx_chr() to wait IRQ.

pfalcon · pfalcon · commit 4b3f1d712b84 · 2016-09-19T00:23:38.000+03:00
Instead of busy-looping waiting for UART input. Not enabled by default,
needs more testing.
diff --git a/esp8266/esp_mphal.c b/esp8266/esp_mphal.c
@@ -60,7 +60,14 @@ int mp_hal_stdin_rx_chr(void) {
         if (c != -1) {
             return c;
         }
+        #if 0
+        // Idles CPU but need more testing before enabling
+        if (!ets_loop_iter()) {
+            asm("waiti 0");
+        }
+        #else
         mp_hal_delay_us(1);
+        #endif
     }
 }
 

Original file line number	Diff line number	Diff line change
`@@ -60,7 +60,14 @@ int mp_hal_stdin_rx_chr(void) {`
`60`	`60`	`if (c != -1) {`
`61`	`61`	`return c;`
`62`	`62`	`}`
	`63`	`+ #if 0`
	`64`	`+ // Idles CPU but need more testing before enabling`
	`65`	`+ if (!ets_loop_iter()) {`
	`66`	`+ asm("waiti 0");`
	`67`	`+ }`
	`68`	`+ #else`
`63`	`69`	`mp_hal_delay_us(1);`
	`70`	`+ #endif`
`64`	`71`	`}`
`65`	`72`	`}`
`66`	`73`