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feature(psram): add support for 64MBit psram of 1.8v and 3.3v.

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1. Add reading psram EID.
2. Configure different clock mode for different EID.
3. add API to get psram size and voltage.
4. Remove unnecessary VSPI claim.

For 32MBit@1.8V and 64MBit@3.3V psram, there should be 2 extra clock cycles after CS get high level.
For 64MBit@1.8 psram, we can just use standard SPI protocol to drive the psram. We also need to increase the HOLD time for CS in this case.

EID for psram:
32MBit 1.8v: 0x20
64MBit 1.8v: 0x26
64MBit 3.3v: 0x46
This commit is contained in:
Wangjialin
2018-07-04 11:43:30 +08:00
parent 9d830a6f7c
commit 6e9c59bfc3
4 changed files with 275 additions and 125 deletions
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34
components/esp32/spiram.c
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@@ -23,6 +23,7 @@ we add more types of external RAM memory, this can be made into a more intellige
#include "sdkconfig.h"
#include "esp_attr.h"
#include "esp_err.h"
#include "esp_spiram.h"
#include "spiram_psram.h"
#include "esp_log.h"
#include "freertos/FreeRTOS.h"
@@ -102,6 +103,39 @@ void IRAM_ATTR esp_spiram_init_cache()
#endif
}
esp_spiram_volt_t esp_spiram_get_chip_volt()
{
if (!spiram_inited) {
ESP_LOGE(TAG, "SPI RAM not initialized");
return ESP_SPIRAM_VOLT_INVALID;
}
psram_volt_t volt = psram_get_volt();
switch (volt) {
case PSRAM_VOLT_1V8:
return ESP_SPIRAM_VOLT_1V8;
case PSRAM_VOLT_3V3:
return ESP_SPIRAM_VOLT_3V3;
default:
return ESP_SPIRAM_VOLT_INVALID;
}
}
esp_spiram_size_t esp_spiram_get_chip_size()
{
if (!spiram_inited) {
ESP_LOGE(TAG, "SPI RAM not initialized");
return ESP_SPIRAM_SIZE_INVALID;
}
psram_size_t psram_size = psram_get_size();
switch (psram_size) {
case PSRAM_SIZE_32MBITS:
return ESP_SPIRAM_SIZE_32MBITS;
case PSRAM_SIZE_64MBITS:
return ESP_SPIRAM_SIZE_64MBITS;
default:
return ESP_SPIRAM_SIZE_INVALID;
}
}
esp_err_t esp_spiram_init()
{