Wiznet WIZ610io User Manual page 10

/* Pseudo Code for Write data of 8bit per packet */
#define data_write_command 0x80
uint16 addr; // Address : 16bits
int16 data_len; // Data length :15bits
uint8 data_buf[]; // Array for data
{
SpiSendData(); //Send data from MCU to W6100
ISR_DISABLE();// Interrupt Service Routine disable
CSoff();// CS=0, SPI start
SpiSendData(((addr+idx) & 0xFF00) >> 8); // Address byte 1
SpiSendData((addr+idx) & 0x00FF); // Address byte 2
// Data write command + Data length upper 7bits
SpiSendData((data_write_command | ((data_len& 0x7F00) >> 8)));
// Data length bottom 8bits
SpiSendData((data_len& 0x00FF));
// Write data: On data_len> 1, Burst Write Processing Mode.
for(int idx = 0; idx<data_len; idx++)
SpiSendData(data_buf[idx]);
CSon(); // CS=1, SPI end
IINCHIP_ISR_ENABLE(); // Interrupt Service Routine disable
}
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