Raspberries/mraa
Private
Public Access
2
0
Fork 0
Code Activity

ft4222: prepares onboard gpio support in addition to i2c expander option

Browse Source 
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Mihai Tudor Panu
2015-12-01 11:50:44 +00:00
committed by Brendan Le Foll
parent 1c7bd53bf3
commit 5f4f0a2aef
1 changed files with 55 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

75
src/usb/ftdi_ft4222.c
View File

@@ -37,12 +37,13 @@
#define PCA9672_ADDR 0x20
static FT_HANDLE ftHandle = (FT_HANDLE) NULL;
static FT_HANDLE ftHandleGPIO = (FT_HANDLE) NULL;
static FT_HANDLE ftHandle = (FT_HANDLE) NULL; //I2C Handle
static GPIO_Dir pinDirection[] = {GPIO_OUTPUT, GPIO_OUTPUT, GPIO_OUTPUT, GPIO_OUTPUT};
static int bus_speed = 400;
static int numI2cGpioExapnderPins = 8;
static int numI2cGpioExapnderPins = 0;
static int numUsbGpio = 0;
mraa_result_t
mraa_ftdi_ft4222_init()
{
@@ -90,21 +91,35 @@ mraa_ftdi_ft4222_init()
*/
syslog(LOG_NOTICE, "FT_GetDeviceInfoList returned %d devices\n", numDevs);
DWORD locationId = 0;
for (i = 0; i < numDevs && locationId == 0; ++i) {
// printf("%d: type = %d, location = %d\n", i, devInfo[i].Type, devInfo[i].LocId);
if (devInfo[i].Type == FT_DEVICE_4222H_0 || devInfo[i].Type == FT_DEVICE_4222H_3)
locationId = devInfo[i].LocId;
}
if (locationId == 0) {
syslog(LOG_ERR, "FT_GetDeviceInfoList contains no valid devices\n");
if(numDevs > 2) {
syslog(LOG_ERR, "CNFMODE not supported. Valid modes are 0 or 3.\n");
mraaStatus = MRAA_ERROR_NO_RESOURCES;
goto init_exit;
}
ftStatus = FT_OpenEx((PVOID)(uintptr_t) locationId, FT_OPEN_BY_LOCATION, &ftHandle);
if(numDevs = 2) {
ftStatus = FT_OpenEx((PVOID)(uintptr_t) devInfo[1].LocId, FT_OPEN_BY_LOCATION, &ftHandleGPIO);
if (ftStatus != FT_OK) {
syslog(LOG_ERR, "FT_OpenEx GPIO handle failed (error %d)\n", (int) ftStatus);
mraaStatus = MRAA_ERROR_NO_RESOURCES;
goto init_exit;
}
FT4222_SetSuspendOut(ftHandleGPIO, false);
FT4222_SetWakeUpInterrupt(ftHandleGPIO, false);
ftStatus = FT4222_GPIO_Init(ftHandleGPIO, pinDirection);
if (tStatus != FT_OK) {
syslog(LOG_ERR, "FT4222_GPIO_Init failed (error %d)\n", (int) ftStatus);
mraaStatus = MRAA_ERROR_NO_RESOURCES;
goto init_exit;
}
}
ftStatus = FT_OpenEx((PVOID)(uintptr_t) devInfo[0].LocId, FT_OPEN_BY_LOCATION, &ftHandle);
if (ftStatus != FT_OK) {
syslog(LOG_ERR, "FT_OpenEx failed (error %d)\n", (int) ftStatus);
syslog(LOG_ERR, "FT_OpenEx I2C handle failed (error %d)\n", (int) ftStatus);
mraaStatus = MRAA_ERROR_NO_RESOURCES;
goto init_exit;
}
@@ -198,13 +213,18 @@ static mraa_boolean_t
mraa_ftdi_ft4222_detect_io_expander()
{
uint8_t data;
return mraa_ftdi_ft4222_i2c_read_internal(ftHandle, PCA9672_ADDR, &data, 1) == 1;
if(mraa_ftdi_ft4222_i2c_read_internal(ftHandle, PCA9672_ADDR, &data, 1) == 1) {
numI2cGpioExapnderPins = 8;
return 1;
}
return 0;
}
/******************* I2C functions *******************/
// Function not currently mapped or used since we have virtual pin definitions
static mraa_i2c_context
mraa_ftdi_ft4222_i2c_init_raw(unsigned int bus)
mraa_ftdi_ft4222_i2c_init_raw_replace(unsigned int bus)
{
// Tell the FT4222 to be an I2C Master.
FT4222_STATUS ft4222Status = FT4222_I2CMaster_Init(ftHandle, bus_speed);
@@ -429,9 +449,24 @@ mraa_ftdi_ft4222_gpio_dir_replace(mraa_gpio_context dev, mraa_gpio_dir_t dir)
{
switch (dir) {
case MRAA_GPIO_IN:
if(dev->phy_pin >= numI2cGpioExapnderPins) {
pinDirection[dev->phy_pin - numI2cGpioExapnderPins] = GPIO_INPUT;
return MRAA_SUCCESS;
}
case MRAA_GPIO_OUT:
if(dev->phy_pin >= numI2cGpioExapnderPins) {
pinDirection[dev->phy_pin - numI2cGpioExapnderPins] = GPIO_OUTPUT;
return MRAA_SUCCESS;
}
case MRAA_GPIO_OUT_HIGH:
if(dev->phy_pin >= numI2cGpioExapnderPins) {
pinDirection[dev->phy_pin - numI2cGpioExapnderPins] = GPIO_OUTPUT;
}
return mraa_ftdi_ft4222_gpio_write_replace(dev, 1);
case MRAA_GPIO_OUT_LOW:
if(dev->phy_pin >= numI2cGpioExapnderPins) {
pinDirection[dev->phy_pin - numI2cGpioExapnderPins] = GPIO_OUTPUT;
}
return mraa_ftdi_ft4222_gpio_write_replace(dev, 0);
default:
;
@@ -536,15 +571,15 @@ mraa_ftdi_ft4222()
// 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;
pinIndex++;
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;
// Set override functions
mraa_adv_func_t* func_table = (mraa_adv_func_t*) calloc(1, sizeof(mraa_adv_func_t));