87 lines
2.2 KiB
C++
87 lines
2.2 KiB
C++
/* PCA9655E_4_scan_loop.ino
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does same as PCA9655E_2_scan.ino, but using keybrd library classes
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pictures in PCA9655E_2_scan/
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set port 1 pins
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read and print value of port 0
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measure port 1 pin voltages with a multimeter
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DESTINATION PIN PIN_NUMBER PIN DESTINATION
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x INT 1 24 VDD Teensy LC 3.3V
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SCL AD1 2 23 SDA Teensy LC 18
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GND AD2 3 22 SCL Teensy LC 19
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GND IO0_0 4 21 AD0 SCL
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GND IO0_1 5 20 IO1_6 x
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IO1_1 IO0_2 6 19 IO1_5 x
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GND IO0_3 7 18 IO1_4 x
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GND IO0_4 8 17 IO1_4 x
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GND IO0_5 9 16 IO1_3 x
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x IO0_6 10 15 IO1_2 x
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x IO0_7 11 14 IO1_1 IO0_2 strobe pin
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GND VSS 12 13 IO1_0 x
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*/
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#include <Port_PCA9655E.h>
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#include <Scanner_IOE.h>
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const uint8_t ADDR = 0x18; //I2C address with AD2=GND AD1=SCL AD0=SCL
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Port_PCA9655E port0(ADDR, 0, ~0); //read all pins
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Port_PCA9655E port1(ADDR, 1, 0); //for strobe
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Scanner_IOE scanner_R(HIGH, port1, port0);
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void setup()
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{
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delay(6000);
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Keyboard.println("PCA9655E_scan_4_loop.ino");
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scanner_R.begin();
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}
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uint8_t port0_val; //bit pattern
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uint8_t errorCount = 0;
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int loopCount = 0;
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int wait = 0; //delayMicroseconds
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void status()
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{
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Keyboard.print(" loopCount=");
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Keyboard.print(loopCount);
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Keyboard.print(" wait=");
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Keyboard.println(wait);
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};
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void loop()
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{
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port0_val = scanner_R.scan(1<<1); //strobe pin 1
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if ( (B00111111 & port0_val) != B00000100 ) //expect xx000100, where xx float
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{
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Keyboard.print("port0_val=");
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Keyboard.print(port0_val, BIN);
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errorCount++;
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status();
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}
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loopCount++;
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if (loopCount > 32000 || errorCount > 10)
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{
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Keyboard.print("stop errorCount=");
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Keyboard.print(errorCount);
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status();
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while(1);
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}
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if (loopCount % 1000 == 0)
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{
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Keyboard.print(" progress");
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status();
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}
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if (loopCount > 22000)
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{
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wait++; //test other delays
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}
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delayMicroseconds(wait);
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}
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