static inline void w5100_set_buffer(uint16_t _reg, volatile uint8_t *_buf, uint16_t _len)
{
for (int i = 0; i < _len; i++) {
w5100_set(_reg, _buf[ i ]);
_reg++;
}
}
static inline void w5100_sock_set(uint8_t _sock, uint16_t _reg, uint8_t _val)
{
w5100_set(CH_BASE + _sock * CH_SIZE + _reg, _val);
}
void w5100_init( void ) {
// configure the SPI bus.
w5100_spi.slave_idx = W5100_SLAVE_IDX;
w5100_spi.output_length = 4;
w5100_spi.input_length = 4;
w5100_spi.select = SPISelectUnselect;
w5100_spi.cpol = SPICpolIdleLow;
w5100_spi.cpha = SPICphaEdge1;
w5100_spi.dss = SPIDss8bit;
w5100_spi.bitorder = SPIMSBFirst;
w5100_spi.cdiv = SPIDiv64;
chip0.status = W5100StatusUninit;
chip0.curbuf = 0;
w5100_spi.input_buf = &chip0.work_rx[0];
w5100_spi.output_buf = &chip0.work_tx[0];
// wait one second for proper initialization (chip getting powered up).
sys_time_usleep(1000000);
// set DRDY pin
gpio_setup_output(W5100_DRDY_GPIO, W5100_DRDY_GPIO_PIN);
gpio_clear(W5100_DRDY_GPIO, W5100_DRDY_GPIO_PIN);
sys_time_usleep(200);
gpio_set(W5100_DRDY_GPIO, W5100_DRDY_GPIO_PIN);
// allow some time for the chip to wake up.
sys_time_usleep(20000);
// write reset bit into mode register
w5100_set( REG_MR, 1<<RST );
// allow some time to wake up...
sys_time_usleep(20000);
// receive memory size
w5100_set( REG_RX_MEM, 0x55 );
// transmit memory size
w5100_set( REG_TX_MEM, 0x55 );
// Setting the required socket base addresses for reads and writes to/from sockets
for (int i=0; i<SOCKETS; i++) {
SBASE[i] = TXBUF_BASE + SSIZE * i;
RBASE[i] = RXBUF_BASE + RSIZE * i;
}
uint8_t gateway[4];
gateway[0] = ip[0];
gateway[1] = ip[1];
gateway[2] = ip[2];
gateway[3] = 1;
// configure gateway, subnet, mac and ip on "NIC".
w5100_set_buffer( REG_GAR, gateway, 4 );
w5100_set_buffer( REG_SUBR, subnet, 4 );
w5100_set_buffer( REG_SHAR, mac, 6 );
w5100_set_buffer( REG_SIPR, ip, 4 );
// create a socket to send telemetry through.
configure_socket( TELEM_SOCKET, SNMR_MULTI, 1, dport, dest );
// make dest zero and configure socket to receive data
dest[ 0 ] = 0x00;
configure_socket( CMD_SOCKET, 0, dport, dport, dest );
}
