TS-7180 FPGA Sections

From embeddedTS Manuals

FPGA Registers

The recommended way to access the TS-7180 FPGA's forty-four GPIO registers is with Linux's gpioset and gpioget commands (see: GPIO).

The supplied tshwctl utility may also be used to access these registers; run tshwctl -h to see how to use it.

Internally, the TS-7180 accesses its FPGA registers over the 6UL's I2C bus 3. You should only need to do this in programming environments that lack both of those methods mentioned above. The FPGA is available at I2C addresses 0x28-0x2f. First write the address (which is two bytes wide), followed by the data, which is one byte.

The tables below lists all FPGA registers and their functions.

FPGA Registers
Address Bits Description
0-43[1] 7:3 Reserved (Write 0)
2 GPIOn Input Data
1 GPIOn Output Data
0 GPIOn Output Enable
307 7:3 Reserved (Write 0)
2:0 XBee/Nimbelink/MultiTech Cell-modem UART selector (default: 0)
Value Function
0 Leave disconnected
1 Steal UART3 (ttymxc2) from BT
2 Steal UART4 (ttymxc3) from RS-485
3 Steal UART6 (ttymxc5) from RS-232 (on P5 pins 10/11)
4 Steal UART7 (ttymxc6) from RS-232 (on P5 pins 7/8)
5 Steal UART8 (ttymxc7) from GPS
308 7:3 Reserved (Write 0)
2:0 HD12 UART selector (default: 0)
Value Function
0 Leave disconnected
1 Steal UART3 (ttymxc2) from BT
2 Steal UART4 (ttymxc3) from RS-485
3 Steal UART6 (ttymxc5) from RS-232 (on P5 pins 10/11)
4 Steal UART7 (ttymxc6) from RS-232 (on P5 pins 7/8)
5 Steal UART8 (ttymxc7) from GPS
309 0 PWM control[2]
310 7:0 GPIO chip 0/pin 18 (SPARE_1) MUX[3]
(1 = connected, 0 = ignored)
Bit Enable
0 DIG_IN_1
1 DIG_IN_2
2 DIG_IN_3
3 DIG_IN_4
4 DIO_1_IN
5 DIO_2_IN
6 DIO_3_IN
7 DIO_4_IN
311 7:0 Polarity into GPIO chip 0/pin 18 (SPARE_1) MUX[3]
Bit Active High EN
0 DIG_IN_1
1 DIG_IN_2
2 DIG_IN_3
3 DIG_IN_4
4 DIO_1_IN
5 DIO_2_IN
6 DIO_3_IN
7 DIO_4_IN
  1. Each address value corresponds to one GPIO number (n) in the table below.
  2. Write 1 to this address to route the CPU PWM to DIO_1
  3. 3.0 3.1 Requires a board with FPGA version 16 or later.


FPGA GPIOs

The FPGA's GPIOs are "gpiochip5" in the Linux GPIO subsystem.

FPGA GPIO
IO Number Pad Direction
0 WIFI_RESET# OUT
1 EN_WIFI_PWR OUT
2 EN_YEL_LED# OUT
3 EN_GREEN_LED# OUT
4 EN_RED_LED# OUT
5 EN_BLUE_LED# OUT
6 EN_CL_1 OUT
7 EN_CL_2 OUT
8 EN_CL_3 OUT
9 EN_CL_4 OUT
10 EN_ADC1_10V OUT
11 EN_ADC2_10V OUT
12 EN_ADC3_10V OUT
13 EN_ADC4_10V OUT
14 EN_SD_POWER OUT
15 EN_USB_HOST_5V OUT
16 EN_OFF_BD_5V OUT
17 EN_CELL_MODEM_PWR OUT
18 EN_NIMBEL_3.3V OUT
19 EN_GPS_PWR# OUT
20 EN_CAN_XVR# OUT
21 EN_232_XVR OUT
22 EN_LS_OUT_1 OUT
23 EN_LS_OUT_2 OUT
24 EN_LS_OUT_3 OUT
25 EN_LS_OUT_4 OUT
26 EN_LS_OUT_5 OUT
27 EN_LS_OUT_6 OUT
28 EN_LS_OUT_7 OUT
29 MT_RESET# [1] OUT
30 Unused n/a
31 Unused n/a
32 DIG_IN_1 IN
33 DIG_IN_2 IN
34 DIG_IN_3 IN
35 DIG_IN_4 IN
36 SD_BOOT_JMP# IN
37 DIO_IN_1 IN
38 DIO_IN_2 IN
39 DIO_IN_3 IN
40 DIO_IN_4 IN
41 DIO_IN_5 IN
42 DIO_IN_6 IN
43 DIO_IN_7 IN
  1. Requires a board with FPGA version 16 or later.