ESP8266 datasheet(64/117 Pages) ESPRESSIF

64 / 117 page

6. SPI Wi-Fi Passthrough 1-Interrupt Mode

for(idx=0;idx<8;idx++)

{

WRITE_PERI_REG(SPI_W8(HSPI)+(idx<<2),

READ_PERI_REG(SPI_W0(HSPI)+(idx<<2)));

}

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

/***testing part, it can be revised. rd_empty is

set to be 0, the slave can read**/

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

spi_sta.elm_value.rd_empty=0;

WRITE_PERI_REG(SPI_STATUS(HSPI),

(uint32)spi_sta.byte_value);

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

GPIO_OUTPUT_SET(0, 1);

// interrupt line set to be

1, inform the master to read the slave status

/****************master reads the interrupt

handler***************/

}else if(regvalue&SPI_SLV_RD_BUF_DONE){

//*****complete the read operation, rd_empty set to

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

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

spi_sta.elm_value.comm_cnt++;

spi_sta.elm_value.rd_empty=1;

WRITE_PERI_REG(SPI_STATUS(HSPI),

(uint32)spi_sta.byte_value);

GPIO_OUTPUT_SET(0, 1);

// interrupt line set to be

1, inform the master to read the slave status

}

/****************master reads status interrupt

handler***************/

if(regvalue&SPI_SLV_RD_STA_DONE){

GPIO_OUTPUT_SET(0,0);

// interrupt line set to be

0, the master has read the status

}

Espressif

! /!

56 104

2017.05

ESP8266 Datasheet(PDF) 64 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.

ESP8266 Datasheet(HTML) 64 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL