1 files changed, 115 insertions, 0 deletions
diff --git a/software/hhd70dongle/hhd70.c b/software/hhd70dongle/hhd70.c
new file mode 100644
index 0000000..2d4ff93
--- /dev/null
+++ b/software/hhd70dongle/hhd70.c
@@ -0,0 +1,115 @@
+/*
+ *
+ *  mur.sat
+ *
+ *  Somewhen in the year 2012, mur.at will have a nano satellite launched
+ *  into a low earth orbit (310 km above the surface of our planet). The
+ *  satellite itself is a TubeSat personal satellite kit, developed and
+ *  launched by interorbital systems. mur.sat is a joint venture of mur.at,
+ *  ESC im Labor and realraum.
+ *
+ *  Please visit the project hompage at sat.mur.at for further information.
+ *
+ *
+ *  Copyright (C) 2012 Bernhard Tittelbach <xro@realraum.at>
+ *
+ *  This file is part of mur.sat.
+ *
+ *  mur.sat 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.
+ *
+ *  mur.sat 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 mur.sat. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#include "avr/io.h"
+
+#include "hhd70.h"
+
+void hhd70_init(void)
+{
+    //configure Direction of SS / PB0 , MOSI and SCLK as Output to drive CS of CC1101
+    SPI_PORT = (1<<CS);
+    SPI_DDR = (1<<MOSI)|(1<<SCK)|(1<<CS)|(1<<RE)|(1<<TE);
+    SPCR = (1<<SPE)|(1<<MSTR); // | (0<<DORD)  //select MSB first: DORD == 0
+    // SPSR = (0<<SPI2X) // f_osc/4 
+    // SPSR = (1<<SPI2X) // f_osc/2
+    //  SPSR = (1<<SPI2X); (4MHz vs. 8MHz)
+}
+
+void hhd70_spi_cs_enable(void)
+{
+    //pull low
+    SPI_PORT &= ~(1<<CS);
+}
+
+void hhd70_spi_cs_disable(void)
+{
+    //pull high
+    SPI_PORT |= (1<<CS);
+}
+
+#include "usb_rawhid.h"
+#include "util.h"
+
+void hhd70_c1101_wait_chip_rdy(void)
+{
+    //c1101 will set MISO to low if ready
+    while (SPI_PINB_REG & (1<<MISO));
+    //~ unsigned int c;
+    //~ for (c=0; c < 0xFFFFFFFF && (SPI_PINB_REG & (1<<MISO)); c++);
+    //~ uint8_t debug_buff[6];
+    //~ usb_rawhid_send((uint8_t*)"spi waited for:",255);
+    //~ debug_sprint_int16hex(debug_buff, c);
+    //~ usb_rawhid_send(debug_buff,255);
+}
+
+void hhd70_spi_write_byte(char byte)
+{
+    SPDR = byte;					//Load byte to Data register
+    while(!(SPSR & (1<<SPIF))); 	// Wait for transmission complete
+}
+
+char hhd70_spi_exchange_byte(char byte)
+{
+    hhd70_spi_write_byte(byte);
+    return SPDR;
+}
+
+char hhd70_spi_read_byte(void)
+{
+    //transmit something so SCLK runs for 8 bits, so that slave can transfer 1 byte
+    return hhd70_spi_exchange_byte(0);
+}
+
+void hhd70_pa_enable(void)
+{
+    SPI_PORT |= ~(1<<TE);
+}
+
+void hhd70_pa_disable(void)
+{
+    SPI_PORT &= ~(1<<TE);
+}
+
+void hhd70_lna_enable(void)
+{
+    SPI_PORT |= ~(1<<RE);
+}
+
+void hhd70_lna_disable(void)
+{
+    SPI_PORT &= ~(1<<RE);
+}
+
+int8_t hhd70_rx_data_available(void)
+{
+    return SPI_PINB_REG & (1 << GDO2);
+}
+\ No newline at end of file