I have a IMX28EVK board and I would like to to connect this board to a 5-wire resistive touchscreen.

In the Reference Manual of the I.MX28, Freescale said:
LRADC 2 - 6 can be used for 4/5-wire touch-screen control. LRADC 6 can be used for the wiper of 5-wire touch-screen controller and external temperature sensing, but they cannot be enabled at the same time in hardware configuration. LRADC 5 can be used for Y- of 4-wire and LR of 5-wire; LRADC 4 can be used for X- of 4-wire and UR of 5-wire; LRADC 3 can be used for Y+ of 4-wire and LL of 5-wire; LRADC 2 can be used for X+ and UR of 5-wire; For pull-up or pull-down switch control on LRADC2~5 pins, please refer to HW_LRADC_CTRL0 register.
 

I think that there's an error. The word UR is repeated 2 times and UL never appears

I have this touchscreen:

Model: EL-TS-104F-5H Type: Analog resistive 5 wire B-type.

This touchscreen has 5 pin:

1 - RT; 2 - RL; 3 - SG; 4 - LT; 5 - LL

|----------|
|LT      RT|
|          |
|LL      RL|
|----------|

I've made this connection:

RT <-> UR
RL <-> LR
SG <-> wiper
LT <-> UL (?)
LL <-> LL

But the touchscreen doesn't work properly. Is the connection that I've made is correct? If not, what's the right connection? Any suggestions?

I have a IMX28EVK board and I would like to to connect this board to a 5-wire resistive touchscreen. In the Reference Manual of the I.MX28, Freescale said:

LRADC2 - 6 can be used for 4/5-wire touch-screen control. LRADC6 can be used for the wiper of 5-wire touch-screen controller and external temperature sensing, but they cannot be enabled at the same time in hardware configuration. LRADC5 can be used for Y- of 4-wire and LR of 5-wire; LRADC4 can be used for X- of 4-wire and UR of 5-wire; LRADC3 can be used for Y+ of 4-wire and LL of 5-wire; LRADC2 can be used for X+ and UR of 5-wire; For pull-up or pull-down switch control on LRADC2~5 pins, please refer to HW_LRADC_CTRL0 register.

I think that there's an error. The word UR is repeated 2 times and UL never appears

I have this touchscreen:

Model: EL-TS-104F-5H Type: Analog resistive 5 wire B-type.

This touchscreen has 5 pin:

1 - RT; 2 - RL; 3 - SG; 4 - LT; 5 - LL

|----------|
|LT      RT|
|          |
|LL      RL|
|----------|

I've made this connection:

RT <-> UR
RL <-> LR
SG <-> wiper
LT <-> UL (?)
LL <-> LL

But the touchscreen doesn't work properly. Is the connection that I've made is correct? If not, what's the right connection? Any suggestions?

Hi, I have a IMX28EVK board and I would like to to connect this board to a 5-wire resistive touchscreen.

In the Reference Manual of the I.MX28, Freescale said:
LRADC 2 - 6 can be used for 4/5-wire touch-screen control. LRADC 6 can be used for the wiper of 5-wire touch-screen controller and external temperature sensing, but they cannot be enabled at the same time in hardware configuration. LRADC 5 can be used for Y- of 4-wire and LR of 5-wire; LRADC 4 can be used for X- of 4-wire and UR of 5-wire; LRADC 3 can be used for Y+ of 4-wire and LL of 5-wire; LRADC 2 can be used for X+ and UR of 5-wire; For pull-up or pull-down switch control on LRADC2~5 pins, please refer to HW_LRADC_CTRL0 register.

I think that there's an error. The word UR is repeated 2 times and UL never appears

I have this touchscreen:

Model: EL-TS-104F-5H Type: Analog resistive 5 wire B-type.

This touchscreen has 5 pin: 1 - RT; 2 - RL; 3 - SG; 4 - LT; 5 - LL

|----------|
|LT      RT|
|          |
|LL      RL|
|----------|

I've made this connection: RT <-> UR RL <-> LR SG <-> wiper LT <-> UL (?) LL <-> LL

But the touchscreen doesn't work properly. Is the connection that I've made is correct? If not, what's the right connection? Any suggestions? Thanks!

I have a IMX28EVK board and I would like to to connect this board to a 5-wire resistive touchscreen.

In the Reference Manual of the I.MX28, Freescale said:
LRADC 2 - 6 can be used for 4/5-wire touch-screen control. LRADC 6 can be used for the wiper of 5-wire touch-screen controller and external temperature sensing, but they cannot be enabled at the same time in hardware configuration. LRADC 5 can be used for Y- of 4-wire and LR of 5-wire; LRADC 4 can be used for X- of 4-wire and UR of 5-wire; LRADC 3 can be used for Y+ of 4-wire and LL of 5-wire; LRADC 2 can be used for X+ and UR of 5-wire; For pull-up or pull-down switch control on LRADC2~5 pins, please refer to HW_LRADC_CTRL0 register.

I think that there's an error. The word UR is repeated 2 times and UL never appears

I have this touchscreen:

Model: EL-TS-104F-5H Type: Analog resistive 5 wire B-type.

This touchscreen has 5 pin:

1 - RT; 2 - RL; 3 - SG; 4 - LT; 5 - LL

|----------|
|LT      RT|
|          |
|LL      RL|
|----------|

I've made this connection:

RT <-> UR
RL <-> LR
SG <-> wiper
LT <-> UL (?)
LL <-> LL

But the touchscreen doesn't work properly. Is the connection that I've made is correct? If not, what's the right connection? Any suggestions?

I've already asked on the Freescale forum, and also opened a service request in Freescale web site, but, for now, no one has responded.

If this isn't the right place for this kind of question, please tell me and I will immediately close the topic with my apologies.

I have a imx28evk board and I want to connect this board to a 5-wire resistive touchscreen.

In the Reference Manual of the i.MX28, Freescale said:
LRADC 2 - 6 can be used for 4/5-wire touch-screen control. LRADC 6 can be used for the wiper of 5-wire touch-screen controller and external temperature sensing, but they cannot be enabled at the same time in hardware configuration. LRADC 5 can be used for Y- of 4-wire and LR of 5-wire; LRADC 4 can be used for X- of 4-wire and UR of 5-wire; LRADC 3 can be used for Y+ of 4-wire and LL of 5-wire; LRADC 2 can be used for X+ and UR of 5-wire; For pull-up or pull-down switch control on LRADC2~5 pins, please refer to HW_LRADC_CTRL0 register.

(Note: I think that there's an error. The word UR is repeated 2 times and UL never appears)

I have this touchscreen: Model: EL-TS-104F-5H Type: Analog resistive 5 wire B-type. This touchscreen has 5 pin: 1 - RT; 2 - RL; 3 - SG; 4 - LT; 5 - LL

|----------|
|LT      RT|
|          |
|LL      RL|
|----------|

I've made this connection: RT <-> UR RL <-> LR SG <-> wiper LT <-> UL (?) LL <-> LL

But the touchscreen doesn't work properly. Is the connection that I've made is correct? If not, what's the right connection?

Hi, I have a IMX28EVK board and I would like to to connect this board to a 5-wire resistive touchscreen.

In the Reference Manual of the I.MX28, Freescale said:
LRADC 2 - 6 can be used for 4/5-wire touch-screen control. LRADC 6 can be used for the wiper of 5-wire touch-screen controller and external temperature sensing, but they cannot be enabled at the same time in hardware configuration. LRADC 5 can be used for Y- of 4-wire and LR of 5-wire; LRADC 4 can be used for X- of 4-wire and UR of 5-wire; LRADC 3 can be used for Y+ of 4-wire and LL of 5-wire; LRADC 2 can be used for X+ and UR of 5-wire; For pull-up or pull-down switch control on LRADC2~5 pins, please refer to HW_LRADC_CTRL0 register.

I think that there's an error. The word UR is repeated 2 times and UL never appears

I have this touchscreen:

Model: EL-TS-104F-5H Type: Analog resistive 5 wire B-type.

This touchscreen has 5 pin: 1 - RT; 2 - RL; 3 - SG; 4 - LT; 5 - LL

|----------|
|LT      RT|
|          |
|LL      RL|
|----------|

I've made this connection: RT <-> UR RL <-> LR SG <-> wiper LT <-> UL (?) LL <-> LL

But the touchscreen doesn't work properly. Is the connection that I've made is correct? If not, what's the right connection? Any suggestions? Thanks!