ESP8266 datasheet(63/117 Pages) ESPRESSIF

63 / 117 page

6. SPI Wi-Fi Passthrough 1-Interrupt Mode

if(regvalue&SPI_SLV_WR_BUF_DONE){

//*****complete the write operation, wr_busy set to be

1, communication count increases by 1****//

spi_sta.byte_value=READ_PERI_REG(SPI_STATUS(HSPI))&0xff;

spi_sta.elm_value.wr_busy=1;

spi_sta.elm_value.comm_cnt++;

WRITE_PERI_REG(SPI_STATUS(HSPI),

(uint32)spi_sta.byte_value);

//**********************************************//

//*******move the data received by the register

into the memory******//

idx=0;

while(idx<8){

recv_data=READ_PERI_REG(SPI_W0(HSPI)+

(idx<<2));

//os_printf("rcv data : 0x%x

\n\r",recv_data);

spi_data[idx<<2] = recv_data&0xff;

spi_data[(idx<<2)+1] =

(recv_data>>8)&0xff;

spi_data[(idx<<2)+2] =

(recv_data>>16)&0xff;

spi_data[(idx<<2)+3] =

(recv_data>>24)&0xff;

idx++;

}

//***********************************//

//************data transmission completed, wr_busy

set to be 0*************//

spi_sta.byte_value=READ_PERI_REG(SPI_STATUS(HSPI))&0xff;

spi_sta.elm_value.wr_busy=0;

WRITE_PERI_REG(SPI_STATUS(HSPI),

(uint32)spi_sta.byte_value);

************************************************//

/***testing part, it can be revised. This part of

the program is used to copy the data read to the read buffer**/

Espressif

! /!

55 104

2017.05

ESP8266 Datasheet(PDF) 63 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.