Sleeping the WiSheild for low power usage

[GregEigsti]

Keep digging! If I remember correctly trying to find the "real code" in the Microchip sample stuff is an arduous journey with lots of dead ends. But after some digging you should be able to find the "real" implementations - their code is a bit weird...

Greg

[mikezs]

Still not having any luck with this Could anyone provide pointers?

I'm trying something like this (adding to g2100.c by just hacking around)

Code: Select all

void zg_sleep_toggle()
{
   U8 loop_cnt = 0;

   do {
      // write reset register addr
      hdr[0] = ZG_INDEX_ADDR_REG;
      hdr[1] = 0x00;
      hdr[2] = ZG_PWR_CTRL_REG;
      spi_transfer(hdr, 3, 1);

      hdr[0] = ZG_INDEX_DATA_REG;
      hdr[1] = (loop_cnt == 0)?(0x80):(0x0f);
      hdr[2] = 0xff;
      spi_transfer(hdr, 3, 1);
   } while(loop_cnt++ < 1);
   
   
   // write sleep register data
   hdr[0] = ZG_INDEX_ADDR_REG;
   hdr[1] = 0x00;
   hdr[2] = ZG_PWR_STATUS_REG;
   spi_transfer(hdr, 3, 1);
   
   do {
      hdr[0] = 0x40 | ZG_INDEX_DATA_REG;
      hdr[1] = 0x00;
      hdr[2] = 0x00;
      spi_transfer(hdr, 3, 1);
   } while((hdr[1] & ZG_ENABLE_LOW_PWR_MASK) == 0);

   do {
      hdr[0] = 0x40 | ZG_PWR_CTRL_REG_LEN;
      hdr[1] = 0x00;
      hdr[2] = 0x00;
      spi_transfer(hdr, 3, 1);
   } while((hdr[1] == 0) && (hdr[2] == 0));
}

But as I know nothing of the SPI protocol, or the registers on the chip, I have no idea if this will work.