Changeset - 4ffdc5eab0ff
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Ethan Zonca - 10 years ago 2016-03-31 20:55:39
ez@ethanzonca.com
Add power saving measures
1 file changed with 62 insertions and 15 deletions:
src/main.c
62
15
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src/main.c
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//
 
// WSPRHAB: Minimal high-altitude balloon tracker with WSPR telemetry
 
//
 
 
#include "stm32f0xx_hal.h"
 
#include "si5351.h"
 
#include "jtencode.h"
 
#include "adc.h"
 
#include "dma.h"
 
#include "i2c.h"
 
#include "usart.h"
 
#include "gpio.h"
 
#include "gps.h"
 
 
 
void sysclk_init(void);
 
 
#define WSPR_DEFAULT_FREQ 10140100UL
 
#define WSPR_TONE_SPACING 146 // ~1.46 Hz
 
#define WSPR_CTC 10672 // CTC value for WSPR
 
 
// Private functions
 
void sysclk_init(void);
 
void enter_sleep(void);
 
void enter_deepsleep(void);
 
 
// Test stuff
 
char call[7] = "KD8TDF";
 
char loc[5] = "EN72";
 
uint8_t dbm = 10;
 
uint8_t tx_buffer[255];
 
 
 
// Frequencies and channel info
 
uint32_t freq = WSPR_DEFAULT_FREQ;
 
uint8_t symbol_count = WSPR_SYMBOL_COUNT;
 
uint16_t ctc = WSPR_CTC;
 
uint16_t tone_spacing = WSPR_TONE_SPACING;
 
volatile uint8_t proceed = 0;
 
 
// Bring up TCXO and oscillator IC
 
void encode_wspr(void)
 
{
 
    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);
 
 
    // Encode message to transmit
 
    wspr_encode(call, loc, dbm, tx_buffer);
 
 
    // Key transmitter
 
    si5351_output_enable(SI5351_CLK0, 1);
 
 
    // Loop through and transmit symbols TODO: Do this from an ISR or ISR-triggered main loop function call (optimal)
 
    uint8_t i;
 
    for(i=0; i<symbol_count; i++)
 
    {
 
        uint32_t freq2 = (freq * 100) + (tx_buffer[i] * tone_spacing);
 
        si5351_set_freq(freq2, 0, SI5351_CLK0);
 
        HAL_GPIO_TogglePin(LED_BLUE);
 
 
        proceed = 0;
 
        while(!proceed);
 
    }
 
 
    // Disable transmitter
 
    si5351_output_enable(SI5351_CLK0, 0);
 
 
    HAL_GPIO_WritePin(OSC_NOTEN, 1);
 
    HAL_GPIO_WritePin(TCXO_EN, 0);
 
}
 
 
 
TIM_HandleTypeDef htim1;
 
 
int main(void)
 
{
 
    HAL_Init();
 
 
    sysclk_init();
 
    gpio_init();
 
    dma_init();
 
    adc_init();
 
    i2c_init();
 
 
    HAL_GPIO_WritePin(OSC_NOTEN, 0);
 
    HAL_GPIO_WritePin(TCXO_EN, 1);
 
    // Disable ICs
 
    HAL_GPIO_WritePin(OSC_NOTEN, 1);
 
    HAL_GPIO_WritePin(TCXO_EN, 0);
 
 
 
    // Start timer for WSPR
 
    __TIM1_CLK_ENABLE();
 
    htim1.Instance = TIM1;
 
    htim1.Init.Prescaler = 512; // gives 64uS ticks from 8MHz ahbclk
 
    htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
 
    htim1.Init.Period = ctc; // Count up to this value (how many 64uS ticks per symbol)
 
    htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
 
    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);
 
 
    HAL_Delay(100);
 
 
 
//    MX_USART1_UART_Init();
 
 
    jtencode_init();
 
    //gps_init();
 
    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_2MA); // Set for max power if desired (8ma max)
 
    si5351_output_enable(SI5351_CLK0, 1);
 
    //si5351_pll_reset(SI5351_PLLA);
 
 
    uint32_t led_timer = HAL_GetTick();
 
    uint32_t last_gps  = HAL_GetTick();
 
    uint32_t last_wspr  = 0xfffff; // start immediately.
 
 
    HAL_GPIO_TogglePin(LED_BLUE);
 
    HAL_Delay(100);
 
    HAL_GPIO_TogglePin(LED_BLUE);
 
    HAL_Delay(100);
 
    HAL_GPIO_TogglePin(LED_BLUE);
 
    HAL_Delay(100);
 
    HAL_GPIO_TogglePin(LED_BLUE);
 
    HAL_Delay(100);
 
 
 
    while (1)
 
    {
 
        if(HAL_GetTick() - last_wspr > 120000)
 
        {
 
            encode_wspr();
 
            last_wspr = HAL_GetTick();
 
        }
 
 
        if(HAL_GetTick() - led_timer > 100)
 
        {
 
            HAL_GPIO_TogglePin(LED_BLUE);
 
            led_timer = HAL_GetTick();
 
        }
 
        if(HAL_GetTick() - last_gps > 100)
 
        if(HAL_GetTick() - last_gps > 3000)
 
        {
 
//            gps_process();
 
            last_gps = HAL_GetTick();
 
        }
 
 
        enter_sleep();
 
    }
 
 
}
 
 
 
void enter_sleep(void)
 
{
 
    //HAL_SuspendTick();
 
    HAL_TIM_Base_Stop_IT(&htim1);
 
    HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
 
    HAL_TIM_Base_Start_IT(&htim1);
 
    //HAL_ResumeTick();
 
}
 
 
void enter_deepsleep(void)
 
{
 
    // Request to enter STOP mode with regulator in low power mode
 
    HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
 
    // After wake-up from STOP reconfigure the PLL
 
    sysclk_init();
 
}
 
 
 
 
// Initialize system clocks
 
void sysclk_init(void)
 
{
 
    RCC_OscInitTypeDef RCC_OscInitStruct;
 
    RCC_ClkInitTypeDef RCC_ClkInitStruct;
 
    RCC_PeriphCLKInitTypeDef PeriphClkInit;
 
 
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_HSI14;
 
    RCC_OscInitStruct.HSIState = RCC_HSI_ON;
 
    RCC_OscInitStruct.HSI14State = RCC_HSI14_ON;
 
    RCC_OscInitStruct.HSICalibrationValue = 16;
 
    RCC_OscInitStruct.HSI14CalibrationValue = 16;
 
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
 
    HAL_RCC_OscConfig(&RCC_OscInitStruct);
 
 
    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK;
 
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
 
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
 
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
 
    HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0);
 
 
    PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1|RCC_PERIPHCLK_I2C1;
 
    PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK1;
 
    PeriphClkInit.I2c1ClockSelection = RCC_I2C1CLKSOURCE_SYSCLK;
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