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Merge branch 'bugfix/efuse_write_config_v3.3' into 'release/v3.3'

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efuse: set timing configuration before writing (backport v3.3)

See merge request espressif/esp-idf!8231
This commit is contained in:
Angus Gratton
2020-04-08 15:06:30 +08:00
parent 8c5a0a0a57 dd5190868a
commit cde76fece9
1 changed files with 20 additions and 0 deletions
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20
components/efuse/src/esp_efuse_utility.c
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@ -15,6 +15,7 @@
#include "esp_efuse_utility.h"
#include "soc/efuse_reg.h"
#include "esp_clk.h"
#include "esp_log.h"
#include "assert.h"
#include "sdkconfig.h"
@ -209,6 +210,25 @@ void esp_efuse_utility_burn_efuses(void)
}
}
#else
// Update Efuse timing configuration
uint32_t apb_freq_mhz = esp_clk_apb_freq() / 1000000;
uint32_t clk_sel0, clk_sel1, dac_clk_div;
if (apb_freq_mhz <= 26) {
clk_sel0 = 250;
clk_sel1 = 255;
dac_clk_div = 52;
} else if (apb_freq_mhz <= 40) {
clk_sel0 = 160;
clk_sel1 = 255;
dac_clk_div = 80;
} else {
clk_sel0 = 80;
clk_sel1 = 128;
dac_clk_div = 100;
}
REG_SET_FIELD(EFUSE_DAC_CONF_REG, EFUSE_DAC_CLK_DIV, dac_clk_div);
REG_SET_FIELD(EFUSE_CLK_REG, EFUSE_CLK_SEL0, clk_sel0);
REG_SET_FIELD(EFUSE_CLK_REG, EFUSE_CLK_SEL1, clk_sel1);
// Permanently update values written to the efuse write registers
REG_WRITE(EFUSE_CONF_REG, EFUSE_CONF_WRITE);
REG_WRITE(EFUSE_CMD_REG, EFUSE_CMD_PGM);