Gpio16 Related Apis; Parameter Onfiguration; Parameter Configuration For Scene - Espressif ESP8266 Technical Reference

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Interrupt status register GPIO_STATUS
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Bit[15:0] (readable and writable):
If the related bit is set to be 1, the IO interrupts. Bit[15:0] contains 16 GPIOs.
Interrupt clearing register GPIO_STATUS_W1TC
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Bit[15:0] (readable and writable):
Write 1 into the related bit, the related GPIO interrupt status will be cleared.

2.2.5. GPIO16 Related APIs

Different from other IO interfaces, GPIO16(XPD_DCDC) belongs to the RTC module instead
of the general GPIO module. It can be used to wake up the chip during deep-sleep; it can
be configured to input or output mode; but it cannot trigger the IO interrupt. the APIs are
shown below.
• gpio16_output_conf(void)
Set the GPIO16 to the output mode.
gpio16_output_set(uint8 value)
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Output high/low level from GPIO16. Configure GPIO16 to the output mode first.
gpio16_input_conf(void)
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Set the GPIO16 to the input mode.
• gpio16_input_get(void)
Read the GPIO16 input level status. Configure GPIO16 to the input mode first.
2.3. Parameter onfiguration
Three scenes are given as examples for parameter configuration:
Configure the MTDI output high level, and enable the pull up.
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Configure the MTDI to the input mode, and get its level status.
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Configure the MTDI to falling edge triggers interrupt.
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2.3.1. Parameter Configuration for Scene 1
1. Configure the MTDI to GPIO mode.
PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDI_U,FUNC_GPIO12);
This sentence writes 1 into bits 4-5 of PERIPHS_IO_MUX_MTDI_U register. When bits 4-5
of PERIPHS_IO_MUX_MTDI_U are set to be 1, the MTDI is configured to the GPIO mode.
For details of PERIPHS_IO_MUX_MTDI_U register, refer to Section 2.2, Instruction on
GPIO Register.
2. Configure the MTDI output high level.
GPIO_OUTPUT_SET(GPIO_ID_PIN(12), 1);
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2. GPIO
2016.05