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bugfix(flash): improve spi cs timing settings for flash

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cs setup time is recomemded to be 1.5T, and cs hold time is recommended to be 2.5T.
(cs_setup = 1, cs_setup_time = 0; cs_hold = 1, cs_hold_time = 1)
This commit is contained in:
chenjianqiang 2019-05-09 15:26:24 +08:00
parent cad3e23b08
commit 963fe19abf
4 changed files with 26 additions and 0 deletions
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8
components/bootloader_support/include/bootloader_common.h
View file

@ -68,3 +68,11 @@ bool bootloader_common_erase_part_type_data(const char *list_erase, bool ota_dat
* @return Returns true if the list contains the label, false otherwise.
*/
bool bootloader_common_label_search(const char *list, char *label);
/**
* @brief Set the flash CS setup and hold time.
*
* CS setup time is recomemded to be 1.5T, and CS hold time is recommended to be 2.5T.
* cs_setup = 1, cs_setup_time = 0; cs_hold = 1, cs_hold_time = 1
*/
void bootloader_common_set_flash_cs_timing();

11
components/bootloader_support/src/bootloader_common.c
View file

@ -27,6 +27,7 @@
#include "bootloader_flash.h"
#include "bootloader_common.h"
#include "soc/gpio_periph.h"
#include "soc/spi_reg.h"
static const char* TAG = "boot_comm";
@ -145,3 +146,13 @@ bool bootloader_common_erase_part_type_data(const char *list_erase, bool ota_dat
return ret;
}
void bootloader_common_set_flash_cs_timing()
{
SET_PERI_REG_MASK(SPI_USER_REG(0), SPI_CS_HOLD_M | SPI_CS_SETUP_M);
SET_PERI_REG_BITS(SPI_CTRL2_REG(0), SPI_HOLD_TIME_V, 1, SPI_HOLD_TIME_S);
SET_PERI_REG_BITS(SPI_CTRL2_REG(0), SPI_SETUP_TIME_V, 0, SPI_SETUP_TIME_S);
SET_PERI_REG_MASK(SPI_USER_REG(1), SPI_CS_HOLD_M | SPI_CS_SETUP_M);
SET_PERI_REG_BITS(SPI_CTRL2_REG(1), SPI_HOLD_TIME_V, 1, SPI_HOLD_TIME_S);
SET_PERI_REG_BITS(SPI_CTRL2_REG(1), SPI_SETUP_TIME_V, 0, SPI_SETUP_TIME_S);
}

4
components/bootloader_support/src/bootloader_init.c
View file

@ -47,6 +47,7 @@
#include "bootloader_random.h"
#include "bootloader_config.h"
#include "bootloader_clock.h"
#include "bootloader_common.h"
#include "flash_qio_mode.h"
@ -398,6 +399,9 @@ static void IRAM_ATTR flash_gpio_configure(const esp_image_header_t* pfhdr)
#endif
}
}
// improve the flash cs timing.
bootloader_common_set_flash_cs_timing();
}
static void uart_console_configure(void)

3
components/esp32/cpu_start.c
View file

@ -70,6 +70,7 @@
#include "esp_pm.h"
#include "pm_impl.h"
#include "trax.h"
#include "bootloader_common.h"
#define STRINGIFY(s) STRINGIFY2(s)
#define STRINGIFY2(s) #s
@ -160,6 +161,8 @@ void IRAM_ATTR call_start_cpu0()
abort();
#endif
}
# else // If psram is uninitialized, we need to improve the flash cs timing.
bootloader_common_set_flash_cs_timing();
#endif
ESP_EARLY_LOGI(TAG, "Pro cpu up.");