not needed on rp2040

jepler · jepler · commit 6abcac4ed6d2 · 2021-08-19T13:56:31.000-05:00
diff --git a/ports/raspberrypi/common-hal/busio/SPI.c b/ports/raspberrypi/common-hal/busio/SPI.c
@@ -263,8 +263,8 @@ bool common_hal_busio_spi_write(busio_spi_obj_t *self,
 
 bool common_hal_busio_spi_read(busio_spi_obj_t *self,
     uint8_t *data, size_t len, uint8_t write_value) {
-    memset(data, write_value, len);
-    return _transfer(self, data, len, data, len);
+    uint32_t data_out = write_value << 24 | write_value << 16 | write_value << 8 | write_value;
+    return _transfer(self, (const uint8_t *)&data_out, MIN(4, len), data, len);
 }
 
 bool common_hal_busio_spi_transfer(busio_spi_obj_t *self, const uint8_t *data_out, uint8_t *data_in, size_t len) {

Original file line number	Diff line number	Diff line change
`@@ -263,8 +263,8 @@ bool common_hal_busio_spi_write(busio_spi_obj_t *self,`
`263`	`263`
`264`	`264`	`bool common_hal_busio_spi_read(busio_spi_obj_t *self,`
`265`	`265`	`uint8_t *data, size_t len, uint8_t write_value) {`
`266`		`- memset(data, write_value, len);`
`267`		`- return _transfer(self, data, len, data, len);`
	`266`	`+ uint32_t data_out = write_value << 24 \| write_value << 16 \| write_value << 8 \| write_value;`
	`267`	`+ return _transfer(self, (const uint8_t *)&data_out, MIN(4, len), data, len);`
`268`	`268`	`}`
`269`	`269`
`270`	`270`	`bool common_hal_busio_spi_transfer(busio_spi_obj_t self, const uint8_t data_out, uint8_t *data_in, size_t len) {`