Hi
My English is not very good, but I encountered a problem that could not be solved. Please forgive me if there is any improper expression in grammar.
am use SPIM . I want to read N bytes of data, but the actual signal has N+1 data. Why is there an extra byte.
SDK_16.0.0.
void spi_nor_read_exec(uint8 *data,uint32 len)
{
uint32 readLen=0;
uint8* readData=NULL;
readData=data;
nor_tx_buf[0]=0;
memset(nor_tx_buf,0,len);
do{
if(len>255)
{
readLen=255;
}
else
{
readLen=len;
len=0;
}
while (spi_xfer_done==false)
{
;
}
spi_xfer_done=false;
//(void)sd_clock_hfclk_request();
nrf_drv_spi_transfer(&spi_522, NULL, 0, readData,readLen);
while (spi_xfer_done==false)
{
;
}
if(len>255)
{
len-=255;
readData+=255;
}
}while(len>0);
}
when the len=1
