Commit2900ed2

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add SPI.write_readinto() to esp8266 port

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Original file line number	Diff line number	Diff line change
`@@ -185,3 +185,23 @@ bool common_hal_busio_spi_read(busio_spi_obj_t *self,`
`185`	`185`	`}`
`186`	`186`	`return true;`
`187`	`187`	`}`
	`188`	`+`
	`189`	`+boolcommon_hal_busio_spi_transfer(busio_spi_obj_tself,uint8_tdata_out,uint8_t*data_in,size_tlen) {`
	`190`	`+// Process data in chunks, let the pending tasks run in between`
	`191`	`+size_tchunk_size=1024;// TODO this should depend on baudrate`
	`192`	`+size_tcount=len /chunk_size;`
	`193`	`+size_ti=0;`
	`194`	`+for (size_tj=0;j<count;++j) {`
	`195`	`+for (size_tk=0;k<chunk_size;++k) {`
	`196`	`+data_in[i]=spi_transaction(HSPI,0,0,0,0,8,data_out[i],8,0);`
	`197`	`+++i;`
	`198`	`+ }`
	`199`	`+ets_loop_iter();`
	`200`	`+ }`
	`201`	`+while (i<len) {`
	`202`	`+data_in[i]=spi_transaction(HSPI,0,0,0,0,8,data_out[i],8,0);`
	`203`	`+++i;`
	`204`	`+ }`
	`205`	`+return true;`
	`206`	`+`
	`207`	`+}`

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