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xidameng/ameba_RTL8722DM_add_more_GPIO.cpp

Last active August 29, 2021 02:34
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There are 2 files need to update in order to add support for more GPIO pins
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ameba_RTL8722DM_add_more_GPIO.cpp
// "variant.cpp"
PinDescription g_APinDescription[TOTAL_GPIO_PIN_NUM]=
{
{PB_2, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ , NOT_INITIAL}, //D0
{PB_1, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ , NOT_INITIAL}, //D1
{PB_3, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ , NOT_INITIAL}, //D2
{PB_31, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ , NOT_INITIAL}, //D3
{PB_30, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ , NOT_INITIAL}, //D4
{PB_28, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ , NOT_INITIAL}, //D5
{PB_29, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ , NOT_INITIAL}, //D6
{NC, NOT_INITIAL, NOT_INITIAL , NOT_INITIAL}, //D7
{PB_22, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ | PIO_PWM , NOT_INITIAL}, //D8
{PB_23, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ | PIO_PWM , NOT_INITIAL}, //D9
{PB_21, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ | PIO_PWM , NOT_INITIAL}, //D10
{PB_18, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ | PIO_PWM , NOT_INITIAL}, //D11
{PB_19, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ | PIO_PWM , NOT_INITIAL}, //D12
{PB_20, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ | PIO_PWM , NOT_INITIAL}, //D13
{PA_7, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ , NOT_INITIAL}, //D14
{PA_8, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ , NOT_INITIAL}, //D15
{PA_25, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ | PIO_PWM , NOT_INITIAL}, //D16
{PA_26, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ | PIO_PWM , NOT_INITIAL}, //D17
{PB_7, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ | PIO_PWM , NOT_INITIAL}, //D18
{PB_6, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ , NOT_INITIAL}, //D19
{PB_5, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ | PIO_PWM , NOT_INITIAL}, //D20
{PB_4, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ | PIO_PWM , NOT_INITIAL}, //D21
{PA_28, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ , NOT_INITIAL}, //D22
{PA_24, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ | PIO_PWM , NOT_INITIAL}, //D23
{PA_23, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ | PIO_PWM , NOT_INITIAL}, //D24
{PA_22, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ , NOT_INITIAL}, //D25
{PA_21, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ , NOT_INITIAL}, //D26
{PA_20, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ , NOT_INITIAL}, //D27
{PA_19, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ , NOT_INITIAL}, //D28
{PA_12, NOT_INITIAL, PIO_GPIO | PIO_GPIO_IRQ , NOT_INITIAL} //D29 This pin is on the male header!
};
/////////////////////////////////////////////////////////
// "varient.h
#define TOTAL_GPIO_PIN_NUM (30) // default is 29, you should increment this number with the number of new pins added
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xidameng commented Aug 29, 2021

Oh, nice.

I didn't saw the last line. 🤦‍♂️
I need to familiarize with the source code at all.

PB[24] = HS_USI_I2C_SCL
PB[25] = HS_USI_I2C_SDA

Can you please help me to enable these I2C port?

Hi, to add new set of I2C, you should look at this line,
https://github.com/ambiot/ambd_arduino/blob/5b62e45d6721404532d12c3c5397033723f92acd/Arduino_package/hardware/libraries/Wire/Wire.cpp#L275

e.g.:
TwoWire Wire2 = TwoWire(PB_25, PB_24);

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