STC12C5A60S2 MCU IO port working mode setting

STC12C5A60S2 MCU IO port working mode setting
　　All I/O ports of STC12C5A60S2 series MCU can be configured by software into one of four working types. The four types are: quasi-bidirectional port (standard 8051 output mode), push-pull output, input only (high impedance) or open-drain output function.
Each port is controlled by the corresponding bits in the 2 control registers.
After power-on reset, the STC12C5A60S2 series MCU is in quasi-bidirectional port (traditional 8051 I/O port) mode. It is high level when it is above 2V and low level when it is below 0.8V.

I/O port working type setting
PxM1[7:0] PxM0[7:0] I/O port mode
0 0 Quasi-bidirectional port (traditional 8051 I/O port mode), sink current up to 20mA, source current 230uA
0 1 Push-pull output (strong pull-up output, up to 20mA, current limiting resistor required)
1 0 Input only (high impedance)
1 1 Open drain (Open Drain), internal pull-up resistor disconnected, external pull-up resistor required

Note:
　　Although each I/O port can withstand 20mA sink current in weak pull-up (current limiting resistors such as 1K, 560Ω, etc.) and can output 20mA source current in strong push-pull output (current limiting resistors are also required), the recommended operating current of the entire chip should not exceed 55mA. That is, the current flowing in from MCU-VCC should not exceed 55mA, the current flowing out from MCU-GND should not exceed 55mA, and the overall inflow/outflow current should not exceed 55mA.

Here is a macro definition: _BIN
is used to assign a value to each bit of the register. For example:
ADC_CONTR = _BIN(1,0,0,0, 1,0,0,0);
assigns 1 to the 7th and 3rd bits of the ADC_CONTR register, and the other bits are 0. The parameters in brackets are bits 7 to 0.

In the TF card program, if the SPI port is set to push-pull (strong pull-up) output, you can write it like this:
P1M1 = _BIN(0,0,0,0,0,0,0,0);
P1M0 = _BIN(1,1,1,1,1,1,1,1);