ESP8266: Make sure SPI write finishes before returning.

tannewt · tannewt · commit f511c263a0c8 · 2017-02-15T17:25:41.000+01:00
Fixes adafruit#62.
diff --git a/esp8266/common-hal/nativeio/SPI.c b/esp8266/common-hal/nativeio/SPI.c
@@ -122,6 +122,7 @@ bool common_hal_nativeio_spi_write(nativeio_spi_obj_t *self,
         spi_tx8fast(HSPI, data[i]);
         ++i;
     }
+    while (spi_busy(HSPI)) {};  // Wait for SPI to finish the last byte.
     return true;
 }
 

Original file line number	Diff line number	Diff line change
`@@ -122,6 +122,7 @@ bool common_hal_nativeio_spi_write(nativeio_spi_obj_t *self,`
`122`	`122`	`spi_tx8fast(HSPI, data[i]);`
`123`	`123`	`++i;`
`124`	`124`	`}`
	`125`	`+ while (spi_busy(HSPI)) {}; // Wait for SPI to finish the last byte.`
`125`	`126`	`return true;`
`126`	`127`	`}`
`127`	`128`