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Multithreading Solution for A13 Temperatur, Servo, Display Roger Zuber, BZTF
Diff: ShiftOut.cpp
- Revision:
- 0:680471563758
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ShiftOut.cpp Thu Sep 23 18:04:03 2021 +0000 @@ -0,0 +1,127 @@ +#include "mbed.h" +#include "ShiftOut.h" + + +#define SET_LATCH() (LATCH = 0) +#define RESET_LATCH() (LATCH = 1) + +#define ENABLE_RESET() (RESET = 0) +#define DISABLE_RESET() (RESET = 1) + +static char stateArr[8*REGISTER_CNT] = {0}; +static bool hasChanged = false; + +ShiftOut::ShiftOut(PinName ser, PinName srclk, PinName rclk, + PinName oe, PinName reset) : DSERIAL(ser), SRCLK(srclk), RCLK(rclk), LATCH(oe), RESET(reset) +{ + writeByte(0x00); // Reset the values of the registers to 0 + if(RESET != NC){ + DISABLE_RESET(); + } +} + +//Pulses the register +void ShiftOut::updateRegister(){ + SRCLK = 1; + wait_us(2); + SRCLK = 0; +} +//Updates the output register +void ShiftOut::updateOutput(){ + RCLK = 1; + wait_us(2); + RCLK = 0; +} +//Writes a byte to the shift register +void ShiftOut::writeByte(unsigned char byte){ + hasChanged = true; + for(int i = 0; i<8*REGISTER_CNT; i++){ + DSERIAL = (byte & 0x01<<i)>>i; + updateRegister(); + } + updateOutput(); +} +//Writes a byte to the shift register +void ShiftOut::write2Byte(unsigned int word){ + hasChanged = true; + for(int i = 0; i<8*REGISTER_CNT; i++){ + DSERIAL = (word & 0x01<<i)>>i; + updateRegister(); + } + updateOutput(); +} +//Writes a bit to the shift register +void ShiftOut::writeBit(unsigned char bit){ + DSERIAL = bit & 0x01; + updateRegister(); + updateOutput(); + } +//Writes multiple bits from an array to create an animation +void ShiftOut::animate(int arr[][8], int lines, int delay_ms){ + hasChanged = true; + for(int i = 0; i < lines; i++){ + for(int j = 0; j < 8; j++){ + writeBit(arr[i][j]); + } + wait_ms(delay_ms); + } +} + +void ShiftOut::animationExample(){ + hasChanged = true; + int strobe[][8]= {{1,0,0,0,0,0,0,0}, + {0,1,0,0,0,0,0,0}, + {0,0,1,0,0,0,0,0}, + {0,0,0,1,0,0,0,0}, + {0,0,0,0,1,0,0,0}, + {0,0,0,0,0,1,0,0}, + {0,0,0,0,0,0,1,0}, + {0,0,0,0,0,0,0,1}}; + + int nightrider[18][8]= {{1,0,0,0,0,0,0,0}, + {1,1,0,0,0,0,0,0}, + {1,1,1,0,0,0,0,0}, + {0,1,1,1,0,0,0,0}, + {0,0,1,1,1,0,0,0}, + {0,0,0,1,1,1,0,0}, + {0,0,0,0,1,1,1,0}, + {0,0,0,0,0,1,1,1}, + {0,0,0,0,0,0,1,1}, + {0,0,0,0,0,0,0,1}, + {0,0,0,0,0,0,1,1}, + {0,0,0,0,0,1,1,1}, + {0,0,0,0,1,1,1,0}, + {0,0,0,1,1,1,0,0}, + {0,0,1,1,1,0,0,0}, + {0,1,1,1,0,0,0,0}, + {1,1,1,0,0,0,0,0}, + {1,1,0,0,0,0,0,0}}; + + animate(nightrider, 18, 50); + wait(1); + animate(strobe, 8, 200); + } + +void ShiftOut::writeBitAtPos(unsigned char pin, bool state){ + if(hasChanged){ + clearStateArray(); + hasChanged = false; + } + if(pin < 8*REGISTER_CNT){ + stateArr[pin] = state; + } + writeArray(stateArr); +} + +void ShiftOut::writeArray(char arr[8*REGISTER_CNT]){ + for(int i = (8*REGISTER_CNT)-1; i >= 0; i--) { + writeBit(arr[i]); + } + +} + +void ShiftOut::clearStateArray(){ + for(int i = 0; i < 8*REGISTER_CNT; i++){ + stateArr[i] = 0; + } + }