esp_err_t spi_init(spi_host_t host, spi_config_t *config)
{
SPI_CHECK(host < SPI_NUM_MAX, "host num error", ESP_ERR_INVALID_ARG);
SPI_CHECK(host > CSPI_HOST, "CSPI_HOST can't support now", ESP_FAIL);
SPI_CHECK(NULL == spi_object[host], "spi has been initialized", ESP_FAIL);
spi_object[host] = (spi_object_t *)malloc(sizeof(spi_object_t));
SPI_CHECK(spi_object[host], "malloc fail", ESP_ERR_NO_MEM);
spi_object[host]->trans_mux = xSemaphoreCreateMutex();
if (NULL == spi_object[host]->trans_mux) {
spi_deinit(host);
SPI_CHECK(false, "Semaphore create fail", ESP_ERR_NO_MEM);
}
uint16_t dummy_bitlen = 0;
spi_set_event_callback(host, &config->event_cb);
spi_set_mode(host, &config->mode);
spi_set_interface(host, &config->interface);
spi_set_clk_div(host, &config->clk_div);
spi_set_dummy(host, &dummy_bitlen);
spi_set_intr_enable(host, &config->intr_enable);
spi_intr_register(spi_intr, NULL);
spi_intr_enable();
if (spi_object[host]->event_cb) {
spi_object[host]->event_cb(SPI_INIT_EVENT, NULL);
}
return ESP_OK;
}
int spi_init(void)
{
LOG(DEBUG, "spi_nrefs=%d, spi_dev_open=%d", spi_nrefs, spi_dev_open);
spi_nrefs++;
if (spi_nrefs > 1) {
LOG(WARN, "Superfluos call to spi_init()");
return 0;
}
LOG(ALL, "csr-spi-ftdi " VERSION ", git rev " GIT_REVISION "\n");
if (ftdi_init(&ftdic) < 0) {
SPI_ERR("FTDI: init failed");
spi_nrefs = 0;
return -1;
}
if (spi_enumerate_ports() < 0) {
spi_deinit();
return -1;
}
return 0;
}
