From 6cc790e4fba215cdb236fee0e7b2afb0207ab32c Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@mur.at>
Date: Tue, 3 Mar 2015 05:15:57 +0100
Subject: hhd70: added simple task handling        implemented very basic
 receive task

---
 software/hhd70dongle/hhd70dongle.c | 103 +++++++++++++++++++++++++++++++++----
 1 file changed, 94 insertions(+), 9 deletions(-)

diff --git a/software/hhd70dongle/hhd70dongle.c b/software/hhd70dongle/hhd70dongle.c
index d1fb2db..44a2c30 100644
--- a/software/hhd70dongle/hhd70dongle.c
+++ b/software/hhd70dongle/hhd70dongle.c
@@ -47,6 +47,23 @@
 #define DEFAULT_FREQ 437525000
 int32_t current_freq_hz = DEFAULT_FREQ;
 
+
+typedef enum { none, receive, send, beacon } task_t;
+task_t current_task = none;
+task_t last_task = none;
+
+static char* task_to_string(cc1101_state_t state)
+{
+  switch(state) {
+  case none: return "none";
+  case receive: return "receiving";
+  case send: return "sending";
+  case beacon: return "beacon";
+  default: return "unknown";
+  }
+}
+
+
 static void reset_hhd70(void)
 {
   printf("soft resetting HHD70.\r\n");
@@ -165,6 +182,8 @@ static void dump_register_normalized(void)
   printf("RCCTRL1: 0x%02X\r\n", cc1101_get_rcctrl1_status());
 }
 
+
+
 static void handle_cmd(uint8_t cmd)
 {
   switch(cmd) {
@@ -173,8 +192,8 @@ static void handle_cmd(uint8_t cmd)
   case 't': led_toggle(); printf("led TOGGLE\r\n"); break;
   case '!': cc1101_soft_reset(); reset2bootloader(); break;
 
-  case 'r': reset_hhd70(); break;
-  case 'i': reinit_hhd70(); break;
+  case 'r': reset_hhd70(); current_task = none; break;
+  case 'i': reinit_hhd70(); current_task = none; break;
   case 'F': current_freq_hz = DEFAULT_FREQ; update_current_freq(); break;
 
   case '#': current_freq_hz+=100000; update_current_freq(); break;
@@ -184,13 +203,13 @@ static void handle_cmd(uint8_t cmd)
   case '-': current_freq_hz-=10000; update_current_freq(); break;
   case '_': current_freq_hz-=100000; update_current_freq(); break;
 
-  case 'P': powerdown_hhd70(); break;
-  case 'I': cc1101_idle(); print_status(); break;
-  case 'O': osc_off_hhd70();  break;
-  case 'C': cc1101_calibrate(); print_status(); break;
-  case 'X': cc1101_fasttxon(); print_status(); break;
-  case 'R': cc1101_rx(); print_status(); break;
-  case 'T': cc1101_tx(); print_status(); break;
+  case 'P': powerdown_hhd70(); current_task = none; break;
+  case 'I': cc1101_idle(); print_status(); current_task = none; break;
+  case 'O': osc_off_hhd70(); current_task = none; break;
+  case 'C': cc1101_calibrate(); print_status(); current_task = none; break;
+  case 'X': cc1101_fasttxon(); print_status(); current_task = none; break;
+  case 'R': cc1101_rx(); print_status(); current_task = receive; break;
+  case 'T': cc1101_tx(); print_status(); current_task = send; break;
 
   case 'f': print_actual_freq(); break;
   case 's': print_status(); break;
@@ -201,6 +220,71 @@ static void handle_cmd(uint8_t cmd)
   }
 }
 
+uint8_t tempdata[255];
+
+static void do_receive_task(uint8_t first)
+{
+  static uint8_t pos = 0;
+  if(first) pos = 0;
+
+  cc1101_state_t s = cc1101_get_state();
+  switch(s) {
+  case fs_wakeup:
+  case calibrate:
+  case settling:
+  case rx:
+  case txrx_settling: break;
+  case rxfifo_overflow: {
+    printf("%sRX-Fifo overflow! - resetting fifo...\r\n", pos ? "\r\n": "");
+    cc1101_reset_rx_fifo();
+    pos = 0;
+    break;
+  }
+  default: {
+    printf("%sleaving receive task: invalid state '%s'\r\n", pos ? "\r\n": "", cc1101_state_to_string(s));
+    current_task = none;
+    return;
+  }
+  }
+
+  uint8_t r = cc1101_read_rxfifo(tempdata, 255);
+  if(r) {
+    uint8_t i;
+    for(i=0; i<r; ++i) {
+      pos++;
+      printf("%02X%s", tempdata[i], (pos==8) ? "  " : " ");
+      if(pos >= 16) {
+        pos = 0;
+        printf("\r\n");
+      }
+    }
+  }
+}
+
+static void do_send_task(uint8_t first)
+{
+}
+
+static void do_beacon_task(uint8_t first)
+{
+}
+
+static void handle_task(void)
+{
+  uint8_t first = 0;
+  if(current_task != last_task) {
+    printf("switching to task: %s\r\n", task_to_string(current_task));
+    last_task = current_task;
+    first = 1;
+  }
+  switch(current_task) {
+  case receive: do_receive_task(first); return;
+  case send: do_send_task(first); return;
+  case beacon: do_beacon_task(first); return;
+  case none: return;
+  }
+}
+
 int main(void)
 {
   MCUSR &= ~(1 << WDRF);
@@ -222,6 +306,7 @@ int main(void)
       }
       BytesReceived--;
     }
+    handle_task();
 
     usbio_task();
   }
-- 
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