mraa_board_t*
mraa_ftdi_ft4222()
{
mraa_board_t* sub_plat = (mraa_board_t*) calloc(1, sizeof(mraa_board_t));
if (sub_plat == NULL)
return NULL;
mraa_boolean_t haveGpio = mraa_ftdi_ft4222_detect_io_expander();
int pinIndex = 0;
numUsbGpio = haveGpio ? numI2cGpioExapnderPins : 0;
int numUsbPins = numUsbGpio + 2; // Add SDA and SCL
sub_plat->platform_name = PLATFORM_NAME;
sub_plat->phy_pin_count = numUsbPins;
sub_plat->gpio_count = numUsbGpio;
mraa_pininfo_t* pins = (mraa_pininfo_t*) malloc(sizeof(mraa_pininfo_t) * numUsbPins);
if (pins == NULL) {
return NULL;
}
sub_plat->pins = pins;
// Virtual gpio pins on i2c I/O expander.
mraa_pincapabilities_t pinCapsGpio = (mraa_pincapabilities_t){ 1, 1, 0, 0, 0, 0, 0, 0 };
for (pinIndex = 0; pinIndex < numUsbGpio; ++pinIndex) {
char name[8];
sprintf(name, "Pin%d", pinIndex);
strncpy(sub_plat->pins[pinIndex].name, name, 8);
sub_plat->pins[pinIndex].capabilites = pinCapsGpio;
sub_plat->pins[pinIndex].gpio.mux_total = 0;
}
int bus = 0;
sub_plat->i2c_bus_count = 1;
sub_plat->def_i2c_bus = bus;
sub_plat->i2c_bus[bus].bus_id = bus;
// i2c pins (these are virtual, entries are required to configure i2c layer)
mraa_pincapabilities_t pinCapsI2c = (mraa_pincapabilities_t){ 1, 0, 0, 0, 0, 1, 0, 0 };
strncpy(sub_plat->pins[pinIndex].name, "SDA", 8);
sub_plat->pins[pinIndex].capabilites = pinCapsI2c;
sub_plat->pins[pinIndex].i2c.mux_total = 0;
sub_plat->i2c_bus[bus].sda = pinIndex;
pinIndex++;
strncpy(sub_plat->pins[pinIndex].name, "SCL", 8);
sub_plat->pins[pinIndex].capabilites = pinCapsI2c;
sub_plat->pins[pinIndex].i2c.mux_total = 0;
sub_plat->i2c_bus[bus].scl = pinIndex;
// Set override functions
mraa_adv_func_t* func_table = (mraa_adv_func_t*) calloc(1, sizeof(mraa_adv_func_t));
if (func_table == NULL) {
return NULL;
}
mraa_ftdi_ft4222_populate_i2c_func_table(func_table);
if (haveGpio)
mraa_ftdi_ft4222_populate_gpio_func_table(func_table);
sub_plat->adv_func = func_table;
return sub_plat;
}
mraa_board_t*
mraa_ftdi_ft4222()
{
mraa_board_t* sub_plat = (mraa_board_t*) calloc(1, sizeof(mraa_board_t));
if (sub_plat == NULL)
return NULL;
numI2cGpioExpanderPins = mraa_ftdi_ft4222_detect_io_expander();
int pinIndex = 0;
int numUsbGpio = numFt4222GpioPins + numI2cGpioExpanderPins;
int numI2cBusses = 1 + mraa_ftdi_ft4222_detect_i2c_switch();
int numUsbPins = numUsbGpio + 2 * (numI2cBusses-1); // Add SDA and SCL for each i2c switch bus
mraa_pincapabilities_t pinCapsI2c = (mraa_pincapabilities_t) {
1, 0, 0, 0, 0, 1, 0, 0
};
mraa_pincapabilities_t pinCapsI2cGpio = (mraa_pincapabilities_t) {
1, 1, 0, 0, 0, 1, 0, 0
};
mraa_pincapabilities_t pinCapsGpio = (mraa_pincapabilities_t) {
1, 1, 0, 0, 0, 0, 0, 0
};
sub_plat->platform_name = PLATFORM_NAME;
sub_plat->phy_pin_count = numUsbPins;
sub_plat->gpio_count = numUsbGpio;
mraa_pininfo_t* pins = (mraa_pininfo_t*) malloc(sizeof(mraa_pininfo_t) * numUsbPins);
if (pins == NULL) {
return NULL;
}
sub_plat->pins = pins;
int bus = 0;
sub_plat->i2c_bus_count = numI2cBusses;
sub_plat->def_i2c_bus = bus;
sub_plat->i2c_bus[bus].bus_id = bus;
// I2c pins (these are virtual, entries are required to configure i2c layer)
// We currently assume that GPIO 0/1 are reserved for i2c operation
strncpy(sub_plat->pins[pinIndex].name, "IGPIO0/SCL0", MRAA_PIN_NAME_SIZE);
sub_plat->pins[pinIndex].capabilites = pinCapsI2cGpio;
sub_plat->pins[pinIndex].gpio.pinmap = pinIndex;
sub_plat->pins[pinIndex].gpio.mux_total = 0;
sub_plat->pins[pinIndex].i2c.mux_total = 0;
sub_plat->i2c_bus[bus].scl = pinIndex;
pinIndex++;
strncpy(sub_plat->pins[pinIndex].name, "IGPIO1/SDA0", MRAA_PIN_NAME_SIZE);
sub_plat->pins[pinIndex].capabilites = pinCapsI2cGpio;
sub_plat->pins[pinIndex].gpio.pinmap = pinIndex;
sub_plat->pins[pinIndex].gpio.mux_total = 0;
sub_plat->pins[pinIndex].i2c.mux_total = 0;
sub_plat->i2c_bus[bus].sda = pinIndex;
pinIndex++;
// FTDI4222 gpio
strncpy(sub_plat->pins[pinIndex].name, "INT-GPIO2", MRAA_PIN_NAME_SIZE);
sub_plat->pins[pinIndex].capabilites = pinCapsGpio;
sub_plat->pins[pinIndex].gpio.pinmap = pinIndex;
sub_plat->pins[pinIndex].gpio.mux_total = 0;
pinIndex++;
strncpy(sub_plat->pins[pinIndex].name, "INT-GPIO3", MRAA_PIN_NAME_SIZE);
sub_plat->pins[pinIndex].capabilites = pinCapsGpio;
sub_plat->pins[pinIndex].gpio.pinmap = pinIndex;
sub_plat->pins[pinIndex].gpio.mux_total = 0;
pinIndex++;
// Virtual gpio pins on i2c I/O expander.
int i;
for (i = 0; i < numI2cGpioExpanderPins; ++i) {
snprintf(sub_plat->pins[pinIndex].name, MRAA_PIN_NAME_SIZE, "EXP-GPIO%d", i);
sub_plat->pins[pinIndex].capabilites = pinCapsGpio;
sub_plat->pins[pinIndex].gpio.pinmap = pinIndex;
sub_plat->pins[pinIndex].gpio.mux_total = 0;
pinIndex++;
}
// Now add any extra i2c busses behind i2c switch
for (bus = 1; bus < numI2cBusses; ++bus) {
sub_plat->i2c_bus[bus].bus_id = bus;
sub_plat->pins[pinIndex].i2c.mux_total = 0;
snprintf(sub_plat->pins[pinIndex].name, MRAA_PIN_NAME_SIZE, "SDA%d", bus);
sub_plat->pins[pinIndex].capabilites = pinCapsI2c;
sub_plat->i2c_bus[bus].sda = pinIndex;
pinIndex++;
snprintf(sub_plat->pins[pinIndex].name, MRAA_PIN_NAME_SIZE, "SCL%d", bus);
sub_plat->pins[pinIndex].capabilites = pinCapsI2c;
sub_plat->pins[pinIndex].i2c.mux_total = 0;
sub_plat->i2c_bus[bus].scl = pinIndex;
pinIndex++;
}
// Set override functions
mraa_adv_func_t* func_table = (mraa_adv_func_t*) calloc(1, sizeof(mraa_adv_func_t));
if (func_table == NULL) {
return NULL;
}
mraa_ftdi_ft4222_populate_i2c_func_table(func_table);
mraa_ftdi_ft4222_populate_gpio_func_table(func_table);
sub_plat->adv_func = func_table;
return sub_plat;
}
