STATIC void wiznet5k_init(void) {
// SPI configuration
SPI_InitTypeDef *init = &wiznet5k_obj.spi->spi->Init;
init->Mode = SPI_MODE_MASTER;
init->Direction = SPI_DIRECTION_2LINES;
init->DataSize = SPI_DATASIZE_8BIT;
init->CLKPolarity = SPI_POLARITY_LOW; // clock is low when idle
init->CLKPhase = SPI_PHASE_1EDGE; // data latched on first edge, which is rising edge for low-idle
init->NSS = SPI_NSS_SOFT;
init->BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2; // clock freq = f_PCLK / this_prescale_value; Wiz820i can do up to 80MHz
init->FirstBit = SPI_FIRSTBIT_MSB;
init->TIMode = SPI_TIMODE_DISABLED;
init->CRCCalculation = SPI_CRCCALCULATION_DISABLED;
init->CRCPolynomial = 7; // unused
spi_init(wiznet5k_obj.spi, false);
mp_hal_pin_output(wiznet5k_obj.cs);
mp_hal_pin_output(wiznet5k_obj.rst);
// Reset the chip
mp_hal_pin_low(wiznet5k_obj.rst);
mp_hal_delay_ms(1); // datasheet says 2us
mp_hal_pin_high(wiznet5k_obj.rst);
mp_hal_delay_ms(150); // datasheet says 150ms
// Set physical interface callbacks
reg_wizchip_cris_cbfunc(wiz_cris_enter, wiz_cris_exit);
reg_wizchip_cs_cbfunc(wiz_cs_select, wiz_cs_deselect);
reg_wizchip_spi_cbfunc(wiz_spi_read, wiz_spi_write);
// Configure 16k buffers for fast MACRAW
uint8_t sn_size[16] = {16, 0, 0, 0, 0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0};
ctlwizchip(CW_INIT_WIZCHIP, sn_size);
// Seems we need a small delay after init
mp_hal_delay_ms(250);
// Hook the Wiznet into lwIP
wiznet5k_lwip_init(&wiznet5k_obj);
}
/*
*System initialize
*/
uint8_t wizSystemInit(void)
{
uint8_t W5500SockBufSize[2][8] = {{2,2,2,2,2,2,2,2,},{2,2,2,2,2,2,2,2}};
uint32_t tickStart;
/* spi function register */
reg_wizchip_spi_cbfunc(W5500ReadByte, W5500WriteByte);
/* CS function register */
reg_wizchip_cs_cbfunc(W5500Select, W5500DeSelect);
/* Critical section */
reg_wizchip_cris_cbfunc(spiMutexEnter,spiMutexExit);
//W5500Select();
if(ctlwizchip(CW_INIT_WIZCHIP,(void*)W5500SockBufSize) == -1)
{
#if WIZSYSTEM_DEBUG == 1
printf("W5500 initialized fail.\r\n");
#endif
return -1;
}
/*Set network information by default*/
wizchip_setnetinfo(&NetInfo);
tickStart = HAL_GetTick();
do{//check phy status.
randomKey++;
if((HAL_GetTick() - tickStart) > NETINFO_LINK_TIMEOUT)
{
#if WIZSYSTEM_DEBUG == 1
printf("Ethernet Link timeout.\r\n");
#endif
return -1;
}
}while(!isLinked());
return 1;
}
