ESP8266 datasheet(49/117 Pages) ESPRESSIF

49 / 117 page

4. SPI Communication User Guide

WRITE_PERI_REG(SPI_RD_STATUS(SpiNum_HSPI), 0x8A);

WRITE_PERI_REG(SPI_WR_STATUS(SpiNum_HSPI), 0x83);

}

spi_slave_isr_sta

// SPI interrupt callback function.

void spi_slave_isr_sta(void *para)

{

uint32 regvalue;

uint32 statusW, statusR, counter;

if (READ_PERI_REG(0x3ff00020)&BIT4) {

//following 3 lines is to clear isr signal

CLEAR_PERI_REG_MASK(SPI_SLAVE(SpiNum_SPI), 0x3ff);

} else if (READ_PERI_REG(0x3ff00020)&BIT7) { //bit7 is for hspi

isr,

regvalue = READ_PERI_REG(SPI_SLAVE(SpiNum_HSPI));

os_printf("spi_slave_isr_sta SPI_SLAVE[0x%08x]\n\r",

regvalue);

SPIIntClear(SpiNum_HSPI);

SET_PERI_REG_MASK(SPI_SLAVE(SpiNum_HSPI), SPI_SYNC_RESET);

SPIIntClear(SpiNum_HSPI);

SPIIntEnable(SpiNum_HSPI, SpiIntSrc_WrStaDone

| SpiIntSrc_RdStaDone

| SpiIntSrc_WrBufDone

| SpiIntSrc_RdBufDone);

if (regvalue & SPI_SLV_WR_BUF_DONE) {

// User can get data from the W0~W7

os_printf("spi_slave_isr_sta : SPI_SLV_WR_BUF_DONE\n\r");

} else if (regvalue & SPI_SLV_RD_BUF_DONE) {

// TO DO

os_printf("spi_slave_isr_sta : SPI_SLV_RD_BUF_DONE\n\r");

}

if (regvalue & SPI_SLV_RD_STA_DONE) {

statusR = READ_PERI_REG(SPI_RD_STATUS(SpiNum_HSPI));

Espressif

! /!

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2017.05

ESP8266 Datasheet(PDF) 49 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.