diff --git a/components/esp32/spiram_psram.c b/components/esp32/spiram_psram.c index b06954827..bb0ccd64d 100644 --- a/components/esp32/spiram_psram.c +++ b/components/esp32/spiram_psram.c @@ -398,11 +398,9 @@ static void psram_disable_qio_mode(psram_spi_num_t spi_num) psram_cmd_end(spi_num); } -//read psram id -static void psram_read_id(uint64_t* dev_id) +//read psram id, should issue `psram_disable_qio_mode` before calling this +static void psram_read_id(psram_spi_num_t spi_num, uint64_t* dev_id) { - psram_spi_num_t spi_num = PSRAM_SPI_1; - psram_disable_qio_mode(spi_num); uint32_t dummy_bits = 0 + extra_dummy; uint32_t psram_id[2] = {0}; psram_cmd_t ps_cmd; @@ -902,14 +900,19 @@ esp_err_t IRAM_ATTR psram_enable(psram_cache_mode_t mode, psram_vaddr_mode_t vad // GPIO related settings psram_gpio_config(&psram_io, mode); - /* 16Mbit psram ID read error - * workaround: Issue a pre-condition of dummy read id, then Read ID command - */ - psram_read_id(&s_psram_id); - psram_read_id(&s_psram_id); + psram_spi_num_t spi_num = PSRAM_SPI_1; + psram_disable_qio_mode(spi_num); + psram_read_id(spi_num, &s_psram_id); if (!PSRAM_IS_VALID(s_psram_id)) { - ESP_EARLY_LOGE(TAG, "PSRAM ID read error: 0x%08x", (uint32_t)s_psram_id); - return ESP_FAIL; + /* 16Mbit psram ID read error workaround: + * treat the first read id as a dummy one as the pre-condition, + * Send Read ID command again + */ + psram_read_id(spi_num, &s_psram_id); + if (!PSRAM_IS_VALID(s_psram_id)) { + ESP_EARLY_LOGE(TAG, "PSRAM ID read error: 0x%08x", (uint32_t)s_psram_id); + return ESP_FAIL; + } } if (psram_is_32mbit_ver0()) {