flake.nix

@@ -284,30 +284,6 @@
           ];
         };
 
-      packages."x86_64-linux"."touch-sensor_" = 
-      let
-        pkgs = import nixpkgs { system = "x86_64-linux"; };
-        avr = pkgs.pkgsCross.avr.buildPackages;
-      in packages."x86_64-linux"."touch-sensor" { gcc = "${avr.gcc}/bin/avr-gcc"; cflags = mcu_cflags attiny85; avr = true; };
-      packages."x86_64-linux"."touch-sensor" =
-        { gcc, cflags, avr }:
-        let
-          pkgs = import nixpkgs { system = "x86_64-linux"; };
-        in mkProgram {
-          pkgs = pkgs;
-          gcc = gcc;
-          cflags = cflags;
-          pname = "touch-sensor";
-          psrc = ./touch-sensor;
-          inherit avr;
-
-          pbuildInputs = [
-            (packages."x86_64-linux"."dio" { inherit gcc cflags; })
-            (packages."x86_64-linux"."display" { inherit gcc cflags; })
-            (packages."x86_64-linux"."shift-register" { inherit gcc cflags; })
-          ];
-        };
-
       devShell."x86_64-linux" =
         let
           pkgs = import nixpkgs { system = "x86_64-linux"; };

touch-sensor/main.c

@@ -1,94 +0,0 @@
-#include <dio.h>
-#include <stdio.h>
-#include <display.h>
-
-uint32_t read_capacitance(dio_t *dio) {
-    uint32_t i;
-
-    dio_set_direction(dio, LINE_OUT);
-    dio_set(dio, 1);
-
-    i = 0;
-    dio_set_direction(dio, LINE_IN);
-    while (dio_read(dio) > 0) i++;
-    return i;
-}
-
-uint32_t calibrate(dio_t *dio) {
-    uint32_t max = 0;
-
-    for (uint8_t i = 0; i < 100; i++) {
-        uint8_t cap = read_capacitance(dio);
-        max = cap > max ? cap : max;
-        _delay_ms(10);
-    }
-
-    return max;
-}
-
-int main(void) {
-    dio_t sensor = (dio_t){ .ddr = &DDRB, .port = &PORTB, .pin = &PINB, .addr = 0 };
-    display_t display = {
-        .reg = {
-            .output         = { .ddr = &DDRB, .port = &PORTB, .pin = &PINB, .addr = 4 },
-            .shift_clock    = { .ddr = &DDRB, .port = &PORTB, .pin = &PINB, .addr = 3 },
-            .latch_clock    = { .ddr = &DDRB, .port = &PORTB, .pin = &PINB, .addr = 2 },
-        },
-    };
-    display_init(&display);
-
-    display_enable(&display);
-    display_clear(&display);
-
-    // calibration
-    //
-    // 100 times:
-    //  Output 1
-    //  Switch to Input
-    //  measure in a loop until the input is 0
-    //  save the measurement
-    //
-    // normal function
-    //  Output 1
-    //  Switch to input
-    //  measure in a loop until the input is 0
-    //  check against the saved measurement
-    //  enable pin if significantly higher than the saved measurement
-    //  update the average
-
-    MCUCR |= _BV(PUD);
-
-
-    uint8_t calibration_countdown = 0;
-    uint32_t calibration = 0;
-    bool touch = false;
-    while (1) {
-        if (calibration_countdown == 0 && !touch) {
-            calibration = calibrate(&sensor);
-            calibration_countdown = 100;
-
-            char msg[20];
-            snprintf(msg, 20, "calib: %6ld", calibration);
-            display_set_location(&display, 0, 0);
-            display_write_message(&display, msg);
-        }
-
-        uint32_t cap = read_capacitance(&sensor);
-
-        if (cap > calibration) {
-            display_set_location(&display, 1, 0);
-            display_write_message(&display, "touch!");
-            touch = true;
-        } else if (touch) {
-            display_set_location(&display, 1, 0);
-            display_write_message(&display, "      ");
-            touch = false;
-        }
-
-        if (calibration_countdown > 0) {
-            calibration_countdown--;
-        }
-        _delay_ms(100);
-    }
-
-}