FeatherHAB/wsprhab Changeset - f126c64d1202

Changeset - f126c64d1202

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Ethan Zonca - 9 years ago 2016-10-11 22:54:04
ez@ethanzonca.com

Actually fill in the correct grid locator!

3 files changed with 45 insertions and 5 deletions:

inc/wspr.h

src/main.c

src/wspr.c

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inc/wspr.h

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 #ifndef _WSPR_H
 #define _WSPR_H
 // Prototypes
 void wspr_init(void);
 void wspr_sleep(void);
 void wspr_wakeup(void);
-void wspr_transmit(void);
+void wspr_transmit(uint8_t* grid_locator);
 #endif

src/main.c

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@@ @@ -2,48 +2,50 @@ @@
 // WSPRHAB: Minimal high-altitude balloon tracker with WSPR telemetry
 //
 #include "stm32f0xx_hal.h"
 #include "adc.h"
 #include "system.h"
 #include "i2c.h"
 #include "uart.h"
 #include "gpio.h"
 #include "wspr.h"
 #include "gps.h"
 // We have access to the 1PPS pin of the gps... could have trim routine for internal oscillator based on this when we have a fix
 // Probabl wake up 1 minute early -- 0.45min possible +/- on wakeup time with 15min sync intervals
 enum _state
+{
     SYSTEM_IDLE = 0, // awaiting RTC interrupt for wakeup TODO wake up before scheduled time to get fix?
     SYSTEM_GPSACQ, // RTC interrupted
     SYSTEM_WSPRTX, // Wait for timeslot and actually transmit the message
 };
 static void __calc_gridloc(char *dst, double lat, double lon);
 int main(void)
+{
     HAL_Init();
     sysclk_init();
     gpio_init();
     adc_init();
     i2c_init();
     wspr_init();
     uint32_t led_timer = HAL_GetTick();
     led_blink(4);
     uint16_t blink_rate = BLINK_FAST;
     uint8_t state = SYSTEM_GPSACQ;
     uint32_t gps_polltimer = 0;
     uint32_t fix_acq_starttime = 0;
     uint32_t nextwspr_time = 0;
     uint32_t last_wspr_tx_time = 0;
     uint8_t fix_ok = 0;
@@ @@ -103,78 +105,111 @@ int main(void) @@
             // Attempt to acquire GPS fix
             case SYSTEM_GPSACQ:
+            {
                 blink_rate = BLINK_FAST;
                 if(!gps_ison())
+                {
                 	fix_acq_starttime = HAL_GetTick();
                     gps_poweron(); // power on and initialize GPS module
+                }
                 if(gps_getdata()->fixtype > 0 && gps_getdata()->pdop < 5)
+                {
                     // Disable GPS module
                     gps_poweroff();
                     // TODO: Set RTC from GPS time
                     // TODO: Set RTC for countdown to next transmission timeslot!
                     // TODO: Set wspr countdown timer for this transmission!
                     fix_acq_starttime = 0;
                     state = SYSTEM_WSPRTX;
+                }
                 else if(HAL_GetTick() - fix_acq_starttime > 60000)
                 // If no fix in 2 minutes
                 else if(HAL_GetTick() - fix_acq_starttime > 120000)
+                {
                 	  // Flash error code and go to idle probably? or just try forever?
                 	led_blink(4);
+                }
             } break;
             // Wait for wspr timeslot and start transmitting
             case SYSTEM_WSPRTX:
+            {
             	blink_rate = BLINK_SLOW;
                 // Wait for wspr countdown timer to expire and go to tx
 //                if(timeout_expired)
 //                {
             	// If we're after the minute but not more than 2s after the minute, start tx
             	if(HAL_GetTick() >= nextwspr_time)
+            	{
             		if(HAL_GetTick() < nextwspr_time + 2000)
+            		{
 						wspr_transmit();
             			volatile double latitude_flt = (double)gps_getdata()->latitude / 10000000.0;
             			volatile double longitude_flt = (double)gps_getdata()->longitude / 10000000.0;
             			volatile uint8_t grid_locator[7];
             			__calc_gridloc(grid_locator, latitude_flt, longitude_flt);
 						wspr_transmit(grid_locator);
 						last_wspr_tx_time = HAL_GetTick();
 						state = SYSTEM_IDLE;
+            		}
             		else
+            		{
             			// Window was missed, go back to idle, and try again after time delay
 						last_wspr_tx_time = HAL_GetTick();
             			state = SYSTEM_IDLE;
+            		}
+                }
                 // Schedule next wakeup (maybe 2mins prior ot timeslot if no osc trim)
                 // Next wakeup should enter SYSTEM_GPSACQ state...
             } break;
+        }
         if(HAL_GetTick() - led_timer > blink_rate)
+        {
             HAL_GPIO_TogglePin(LED_BLUE);
             led_timer = HAL_GetTick();
+        }
+    }
+}
 static void __calc_gridloc(char *dst, double lat, double lon)
+{
 	int o1, o2, o3;
 	int a1, a2, a3;
 	double remainder;
 	// longitude
 	remainder = lon + 180.0;
 	o1 = (int)(remainder / 20.0);
 	remainder = remainder - (double)o1 * 20.0;
 	o2 = (int)(remainder / 2.0);
 	remainder = remainder - 2.0 * (double)o2;
 	o3 = (int)(12.0 * remainder);
 	// latitude
 	remainder = lat + 90.0;
 	a1 = (int)(remainder / 10.0);
 	remainder = remainder - (double)a1 * 10.0;
 	a2 = (int)(remainder);
 	remainder = remainder - (double)a2;
 	a3 = (int)(24.0 * remainder);
 	dst[0] = (char)o1 + 'A';
 	dst[1] = (char)a1 + 'A';
 	dst[2] = (char)o2 + '0';
 	dst[3] = (char)a2 + '0';
 	dst[4] = (char)o3 + 'A';
 	dst[5] = (char)a3 + 'A';
 	dst[6] = (char)0;
+}

src/wspr.c

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@@ @@ -40,50 +40,55 @@ void wspr_init(void) @@
     htim1.Init.RepetitionCounter = 0;
     HAL_TIM_Base_Init(&htim1);
     HAL_TIM_Base_Start_IT(&htim1);
     HAL_NVIC_SetPriority(TIM1_BRK_UP_TRG_COM_IRQn, 0, 0);
     HAL_NVIC_EnableIRQ(TIM1_BRK_UP_TRG_COM_IRQn);
     // Turn off ICs
     HAL_GPIO_WritePin(OSC_NOTEN, 1);
     HAL_GPIO_WritePin(TCXO_EN, 0);
+}
 // Do anything needed to prepare for sleep
 void wspr_sleep(void)
+{
     HAL_TIM_Base_Stop_IT(&htim1);
+}
 void wspr_wakeup(void)
+{
     HAL_TIM_Base_Start_IT(&htim1);
+}
 // Bring up TCXO and oscillator IC
-void wspr_transmit(void)
+void wspr_transmit(uint8_t* grid_locator)
+{
 	// Copy 4 digit grid locator to local buffer; null terminate
 	for(uint8_t i=0; i<4; i++)
 		loc[i] = grid_locator[i];
 	loc[4] = '\0';
     HAL_GPIO_WritePin(OSC_NOTEN, 0);
     HAL_GPIO_WritePin(TCXO_EN, 1);
     HAL_Delay(100);
     // Bring up the chip
     si5351_init(i2c_get(), SI5351_CRYSTAL_LOAD_8PF, 0);
     si5351_set_correction(0);
     //si5351_set_pll(SI5351_PLL_FIXED, SI5351_PLLA);
     //si5351_set_ms_source(SI5351_CLK0, SI5351_PLLA);
     si5351_set_freq(WSPR_DEFAULT_FREQ * 100, 0, SI5351_CLK0);
     si5351_drive_strength(SI5351_CLK0, SI5351_DRIVE_8MA); // Set for max power if desired (8ma max)
     si5351_output_enable(SI5351_CLK0, 1);
     //si5351_pll_reset(SI5351_PLLA);
     // Make sure the other outputs of the SI5351 are disabled
     si5351_output_enable(SI5351_CLK1, 0); // Disable the clock initially
     si5351_output_enable(SI5351_CLK2, 0); // Disable the clock initially
     // disable clock powers
     si5351_set_clock_pwr(SI5351_CLK1, 0);
     si5351_set_clock_pwr(SI5351_CLK2, 0);
     // Encode message to transmit

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