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ft4222: fixed pca9555 expander detection

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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
2016-06-03 01:11:34 +00:00
committed by Brendan Le Foll
parent 800c89bfa4
commit a702cdf4d5
1 changed files with 14 additions and 11 deletions
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25
src/usb/ftdi_ft4222.c
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@@ -335,19 +335,22 @@ mraa_ftdi_ft4222_detect_io_expander()
if (mraa_ftdi_ft4222_i2c_read_internal(ftHandleI2c, PCA9672_ADDR, &data, 1) == 1) {
gpio_expander_chip = IO_EXP_PCA9672;
return PCA9672_PINS;
} else if (mraa_ftdi_ft4222_i2c_read_internal(ftHandleI2c, PCA9555_ADDR, &data, 1) == 1) {
gpio_expander_chip = IO_EXP_PCA9555;
uint8_t reg = PCA9555_OUTPUT_REG;
mraa_ftdi_ft4222_i2c_write_internal(ftHandleI2c, PCA9555_ADDR, &reg, 1);
mraa_ftdi_ft4222_i2c_read_internal(ftHandleI2c, PCA9555_ADDR, (uint8_t*)&pca9555OutputValue, 2);
reg = PCA9555_DIRECTION_REG;
mraa_ftdi_ft4222_i2c_write_internal(ftHandleI2c, PCA9555_ADDR, &reg, 1);
mraa_ftdi_ft4222_i2c_read_internal(ftHandleI2c, PCA9555_ADDR, (uint8_t*)&pca9555DirectionValue, 2);
return PCA9555_PINS;
} else {
gpio_expander_chip = IO_EXP_NONE;
return 0;
uint8_t reg = PCA9555_INPUT_REG;
mraa_ftdi_ft4222_i2c_write_internal(ftHandleI2c, PCA9555_ADDR, &reg, 1);
if (mraa_ftdi_ft4222_i2c_read_internal(ftHandleI2c, PCA9555_ADDR, &data, 1) == 1) {
gpio_expander_chip = IO_EXP_PCA9555;
reg = PCA9555_OUTPUT_REG;
mraa_ftdi_ft4222_i2c_write_internal(ftHandleI2c, PCA9555_ADDR, &reg, 1);
mraa_ftdi_ft4222_i2c_read_internal(ftHandleI2c, PCA9555_ADDR, (uint8_t*)&pca9555OutputValue, 2);
reg = PCA9555_DIRECTION_REG;
mraa_ftdi_ft4222_i2c_write_internal(ftHandleI2c, PCA9555_ADDR, &reg, 1);
mraa_ftdi_ft4222_i2c_read_internal(ftHandleI2c, PCA9555_ADDR, (uint8_t*)&pca9555DirectionValue, 2);
return PCA9555_PINS;
}
}
gpio_expander_chip = IO_EXP_NONE;
return 0;
}