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Intuitive HMI designs – microcontroller solutions optimized for touch and display control

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embedded.Raven
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re: Intuitive HMI designs – microcontroller solutions optimized for touch and display control
embedded.Raven   2/15/2011 1:41:39 PM
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It is a quite lean, but clever implementation. The LED array is split into lines and columns. The multiplexing of the columns is done by the MCU hardware. The line values are handled by shadow registers, which are copied to the actual pins at each column entry. This is the point in time, where an interrupt is fired. The ROM Library function can be called in this interrupt. It takes care about the line values. With the ROM library it is easy to use this function: SET_LDLINE_CMP(&LDLINE_VALUE[0], &CMP_BRIGHTNESS[0]); //LEDTS ROMLIB function // setup of line values and brightness LDLINE_VALUE[0] = 0x00; // COLA LDLINE value LDLINE_VALUE[1] = 0x40; // COL0 LDLINE value LDLINE_VALUE[2] = 0x20; // COL1 LDLINE value LDLINE_VALUE[3] = 0xF1; // COL2 LDLINE value LDLINE_VALUE[4] = 0x20; // COL3 LDLINE value LDLINE_VALUE[5] = 0x40; // COL4 LDLINE value CMP_BRIGHTNESS[0] = 0xFF; // COLA COMP value CMP_BRIGHTNESS[1] = 0xFF; // COL0 COMP value CMP_BRIGHTNESS[2] = 0xFF; // COL1 COMP value CMP_BRIGHTNESS[3] = 0xFF; // COL2 COMP value CMP_BRIGHTNESS[4] = 0xFF; // COL3 COMP value CMP_BRIGHTNESS[5] = 0xFF; // COL4 COMP value

t.alex
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re: Intuitive HMI designs – microcontroller solutions optimized for touch and display control
t.alex   12/1/2010 11:28:56 PM
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I kinda like the idea of driving big array of leds with multiplexing method (similar LCD driving). How does the integrated ROM library work?

Sanjib.A
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re: Intuitive HMI designs – microcontroller solutions optimized for touch and display control
Sanjib.A   11/30/2010 3:05:37 PM
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It's nice to know about the touch control technology based on oscillator relaxation topology. In addition to the low-pin-count for display/touch control feature of the Microcontroller from Infineon, the integrated ROM library is another interesting feature, which can save on the development time.

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