Difference between revisions of "STM32F107VC/Using MCBQVGA-TS-Display-v12"
From Teknologisk videncenter
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*[http://www.st.com/internet/analog/product/185203.jsp STMPE811 Touch Screen Controller] | *[http://www.st.com/internet/analog/product/185203.jsp STMPE811 Touch Screen Controller] | ||
*[http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00098098.pdf STLD40D White LED power supply for large display backlight] (Loads PDF) | *[http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00098098.pdf STLD40D White LED power supply for large display backlight] (Loads PDF) | ||
| + | =References= | ||
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[[Category:ARM]] | [[Category:ARM]] | ||
Revision as of 09:34, 19 January 2012
Backlight illumination adjust
The signal BL_control[1] turns on the Backlight LED's controlled by the STLD40D[2] IC on the display. To control the illuminace of the LED's its necessary to turn the LED's off and on using Pulse-Width-Modulation (PWM).
Keil MCBSTM32C board
On the Keil MCBSTM32C board the BL_control signal is connected to PB0 (Port B bit 0).
- Looking in the Reference Maual on page 173 section 9.3.7 table 44 it's seen that Timer 3 Channel 3 has an alternate function on PB0.
- To see Timer 3's possibilities on PB0 look on page 161 section 9.1.11 table 23 it's seen that timer 3 can use a GPIO pin as Output Compare Channel X when the pin is configured as Alternate Function Push-Pull.
- To set PB0 as Alternate Function Push-Pull - See the GPIOx_CRL register on page 166.
- To configure Timer 3 as continues PWM output timer see Page 371 section 15.3.9
Links
- MCBSTM32C Display Schematics (Loads PDF)
- AM-240320LDTNQW TFT-LCD Display module with Touch Panel (Loads PDF)
- SPFD5408B 720 channel driver for TFT-LCD Display (Loads PDF)
- STMPE811 Touch Screen Controller
- STLD40D White LED power supply for large display backlight (Loads PDF)