From 432385604cd0616084429be771d77d56b0ac236c Mon Sep 17 00:00:00 2001 From: Testato Date: Wed, 24 Jun 2015 22:32:59 +0200 Subject: [PATCH] Update core_esp8266_phy.c added vdd33_const explanation from official Espressif documentation --- cores/esp8266/core_esp8266_phy.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/cores/esp8266/core_esp8266_phy.c b/cores/esp8266/core_esp8266_phy.c index 2ac33a8a6..8a3c0ccf8 100644 --- a/cores/esp8266/core_esp8266_phy.c +++ b/cores/esp8266/core_esp8266_phy.c @@ -195,12 +195,18 @@ static uint8_t phy_init_data[128] = // 5.5m, 11m power index [0~5] [98] = 0, + // vdd33_const - // the voltage of PA_VDD - // x=0xff: it can measure VDD33, - // 18<=x<=36: use input voltage, - // the value is voltage*10, 33 is 3.3V, 30 is 3.0V, - // x<18 or x>36: default voltage is 3.3V + // the value of this byte depend from the TOUT pin usage (1 or 2): + // 1) + // analogRead function (system_adc_read()): + // is only available when wire TOUT pin17 to external circuitry, Input Voltage Range restricted to 0 ~ 1.0V. + // For this function the vdd33_const must be set as real power voltage of VDD3P3 pin 3 and 4 + // The range of operating voltage of ESP8266 is 1.8V~3.6V，the unit of vdd33_const is 0.1V，so effective value range of vdd33_const is [18,36] + // 2) + // getVcc function (system_get_vdd33): + // is only available when TOUT pin17 is suspended (floating), this function measure the power voltage of VDD3P3 pin 3 and 4 + // For this function the vdd33_const must be set as 255. [107] = 33, // disable RF calibration for certain number of times