alex/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2025-08-11 04:57:38 +00:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source 
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 783ddd1e05
commit d6c40c7c1d
4 changed files with 26 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
components/bootloader_support/src/bootloader_common.c
View File

@@ -25,6 +25,8 @@
#include "bootloader_common.h"
#include "soc/gpio_periph.h"
#include "soc/rtc.h"
#include "soc/efuse_reg.h"
#include "soc/spi_reg.h"
#include "esp_image_format.h"
#include "bootloader_sha.h"
#include "sys/param.h"
@@ -270,3 +272,13 @@ void bootloader_common_vddsdio_configure()
}
#endif // CONFIG_BOOTLOADER_VDDSDIO_BOOST
}
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);
}