From 7caffb47d6fc9426b2f65ad6bdd6197b324fb68a Mon Sep 17 00:00:00 2001
From: Bernhard Tittelbach <bernhard@tittelbach.org>
Date: Sun, 12 Jun 2016 06:59:34 +0200
Subject: basic bmp280 lib (mostly adafruit reimplementation) and example

---
 usb-bmp280/usb-bmp280.c | 120 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 usb-bmp280/usb-bmp280.c

(limited to 'usb-bmp280/usb-bmp280.c')

diff --git a/usb-bmp280/usb-bmp280.c b/usb-bmp280/usb-bmp280.c
new file mode 100644
index 0000000..0c19545
--- /dev/null
+++ b/usb-bmp280/usb-bmp280.c
@@ -0,0 +1,120 @@
+/*
+ *  spreadspace avr utils - usb-bmp180 example
+ *
+ *
+ *  Copyright (C) 2016 Bernhard Tittelbach <bernhard@tittelbach.org>
+ *  basically this is refactored and enhanced code from:
+ *   https://github.com/sparkfun/BMP180_Breakout_Arduino_Library
+ *   Please buy the sparkfun people Beer when you see them!!!!
+ *
+ *  This file is part of spreadspace avr utils.
+ *
+ *  spreadspace avr utils is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  spreadspace avr utils is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <avr/io.h>
+#include <avr/wdt.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include <stdio.h>
+
+#include <LUFA/Drivers/Peripheral/SPI.h>
+
+#include "util.h"
+#include "led.h"
+#include "usbio.h"
+#include "bmp280.h"
+
+#define ALTITUDE 353.0 // Altitude of Graz in Austria
+
+#define PIN_CS_S0 PD1
+#define REG_CS_S0 PIND
+#define PIN_CS_S1 PD0
+#define REG_CS_S1 PIND
+
+#define OP_SETBIT |=
+#define OP_CLEARBIT &= ~
+#define OP_CHECK &
+#define PIN_SW(PORTDDRREG, PIN, OP) PORTDDRREG OP (1 << PIN)
+
+#define PINREG(x) x
+#define DDRREG(x) *(&x+1)
+#define PORTREG(x) *(&x+2)
+
+#define HIGHv OP_SETBIT
+#define LOWv OP_CLEARBIT
+
+#define CS_SENSOR_0(LOWHIGH) (PIN_SW(PORTREG(REG_CS_S0),PIN_CS_S0,LOWHIGH))
+#define CS_SENSOR_1(LOWHIGH) (PIN_SW(PORTREG(REG_CS_S1),PIN_CS_S1,LOWHIGH))
+#define CS_SENSOR(x,LOWHIGH) CS_SENSOR_##x(LOWHIGH)
+
+void printCoeffs(bmp280_sensor *sensor)
+{
+  printf("Coeffients\r\n");
+  printf("T1: %d, T2: %d, T3: %d\r\n", sensor->dig_T1, sensor->dig_T2, sensor->dig_T3);
+  printf("P1: %d, P2: %d, P3: %d, P4: %d, P5: %d, P6: %d, P7: %d, P8: %d, P9: %d\r\n",sensor->dig_P1,sensor->dig_P2,sensor->dig_P3,sensor->dig_P4,sensor->dig_P5,sensor->dig_P6,sensor->dig_P7,sensor->dig_P8,sensor->dig_P9);
+  printf("H1: %d, H2: %d, H3: %d, H4: %d, H5: %d, H6: %d\r\n",sensor->dig_H1,sensor->dig_H2,sensor->dig_H3
+    ,sensor->dig_H4,sensor->dig_H5,sensor->dig_H6);
+}
+
+int main(void)
+{
+  MCUSR &= ~(1 << WDRF);
+  wdt_disable();
+
+  cpu_init();
+  led_init();
+  usbio_init();
+  sei();
+
+  bmp280_sensor sensor0;
+  bmp280_sensor sensor1;
+
+  CS_SENSOR(0,HIGHv);
+  CS_SENSOR(1,HIGHv);
+  SPI_Init(BMP280_LUFA_SPIO_OPTIONS);
+  bmp280_init(&sensor0, &PORTREG(REG_CS_S0), PIN_CS_S0);
+  bmp280_init(&sensor1, &PORTREG(REG_CS_S1), PIN_CS_S1);
+
+  printf("BMP280 initialized");
+
+  for(;;) {
+    
+    printf("\r\n== Sensor 0 ==\r\n");
+    printCoeffs(&sensor0);
+    float temp = bmp280_readTemp(&sensor0);
+    float pressure = bmp280_readPressure(&sensor0);
+    printf("\r\nPressure: %.2f Pa @ %.2f degC\r\n", pressure, temp);
+
+    printf("\r\n== Sensor 1 ==\r\n");
+    printCoeffs(&sensor1);
+    temp = bmp280_readTemp(&sensor1);
+    pressure = bmp280_readPressure(&sensor1);
+    printf("\r\nPressure: %.2f Pa @ %.2f degC\r\n", pressure, temp);
+
+    usbio_task();
+
+    int16_t BytesReceived = usbio_bytes_received();
+    while(BytesReceived > 0) {
+      int ReceivedByte = fgetc(stdin);
+      if(ReceivedByte != EOF) {
+        if (ReceivedByte == '!')
+          reset2bootloader();
+      }
+      BytesReceived--;
+    }
+
+    _delay_ms(2000);  // Pause for 5 seconds.
+  }
+}
-- 
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