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feat(psram): support 16Mbit PSRAM for esp32

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chenjianqiang
2020-07-03 22:13:00 +08:00
parent bff6b5b70e
commit 9de04b9f5f
2 changed files with 8 additions and 2 deletions
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6
components/esp32/spiram.c
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@@ -114,12 +114,14 @@ bool esp_spiram_test(void)
void IRAM_ATTR esp_spiram_init_cache(void)
{
int size = esp_spiram_get_size();
if (size > 4 * 1024 * 1024) size = 4 * 1024 * 1024; // we can map at most 4MByte
//Enable external RAM in MMU
cache_sram_mmu_set( 0, 0, SOC_EXTRAM_DATA_LOW, 0, 32, 128 );
cache_sram_mmu_set(0, 0, SOC_EXTRAM_DATA_LOW, 0, 32, (size / 1024 / 32));
//Flush and enable icache for APP CPU
#if !CONFIG_FREERTOS_UNICORE
DPORT_CLEAR_PERI_REG_MASK(DPORT_APP_CACHE_CTRL1_REG, DPORT_APP_CACHE_MASK_DRAM1);
cache_sram_mmu_set( 1, 0, SOC_EXTRAM_DATA_LOW, 0, 32, 128 );
cache_sram_mmu_set(1, 0, SOC_EXTRAM_DATA_LOW, 0, 32, (size / 1024 / 32));
#endif
}