rx-hal-diy-e22-1W-g441kb.h

//*******************************************************
// Copyright (c) MLRS project
// GPL3
// https://www.gnu.org/licenses/gpl-3.0.de.html
// OlliW @ www.olliw.eu
//*******************************************************
// hal
//********************************************************

//-------------------------------------------------------
// RX DIY E22 v007 STM32G441KB
//-------------------------------------------------------

#define DEVICE_HAS_OUT


//-- Timers, Timing, EEPROM, and such stuff

#define DELAY_USE_DWT

#define SYSTICK_TIMESTEP          1000
#define SYSTICK_DELAY_MS(x)       (uint16_t)(((uint32_t)(x)*(uint32_t)1000)/SYSTICK_TIMESTEP)

#define EE_START_PAGE             60 // 128 kB flash, 2 kB page


//-- UARTS
// UARTB = serial port
// UART = output port, SBus or whatever
// UARTC = debug port

#define UARTB_USE_UART2_REMAPPED2 // serial
#define UARTB_BAUD                TX_SERIAL_BAUDRATE
#define UARTB_USE_TX
#define UARTB_TXBUFSIZE           TX_SERIAL_TXBUFSIZE
#define UARTB_USE_TX_ISR
#define UARTB_USE_RX
#define UARTB_RXBUFSIZE           TX_SERIAL_RXBUFSIZE
//#define UARTB_USE_RX_IO           IO_PA15 // normally would be PB4!!  Fixed in hardware

#define UART_USE_UART1                      // out pin
#define UART_BAUD                 100000    // SBus normal baud rate, is being set later anyhow
#define UART_USE_TX
#define UART_TXBUFSIZE            256       // 512
#define UART_USE_TX_ISR
//#define UART_USE_RX
//#define UART_RXBUFSIZE            512

#define UARTC_USE_LPUART1 // debug
#define UARTC_BAUD                115200
#define UARTC_USE_TX
#define UARTC_TXBUFSIZE           512
#define UARTC_USE_TX_ISR
//#define UARTC_USE_RX
//#define UARTC_RXBUFSIZE           512


//-- SX1: SX12xx & SPI

#define SPI_USE_SPI1              // PA5, PA6, PA7
#define SPI_CS_IO                 IO_PA4
#define SPI_USE_CLK_LOW_1EDGE     // datasheet says CPHA = 0  CPOL = 0
#define SPI_USE_CLOCKSPEED_9MHZ

#define SX_RESET                  IO_PB0
#define SX_DIO1                   IO_PB4
#define SX_BUSY                   IO_PA8
#define SX_RX_EN                  IO_PB6
#define SX_TX_EN                  IO_PB5

#define SX_DIO1_SYSCFG_EXTI_PORTx     LL_SYSCFG_EXTI_PORTB
#define SX_DIO1_SYSCFG_EXTI_LINEx     LL_SYSCFG_EXTI_LINE4
#define SX_DIO_EXTI_LINE_x            LL_EXTI_LINE_4
#define SX_DIO_EXTI_IRQn              EXTI4_IRQn
#define SX_DIO_EXTI_IRQHandler        EXTI4_IRQHandler
//#define SX_DIO_EXTI_IRQ_PRIORITY    11

void sx_init_gpio(void)
{
    gpio_init(SX_RESET, IO_MODE_OUTPUT_PP_HIGH, IO_SPEED_VERYFAST);
    gpio_init(SX_DIO1, IO_MODE_INPUT_PD, IO_SPEED_VERYFAST);
    gpio_init(SX_BUSY, IO_MODE_INPUT_PU, IO_SPEED_VERYFAST);
    gpio_init(SX_TX_EN, IO_MODE_OUTPUT_PP_LOW, IO_SPEED_VERYFAST);
    gpio_init(SX_RX_EN, IO_MODE_OUTPUT_PP_LOW, IO_SPEED_VERYFAST);
}

bool sx_busy_read(void)
{
    return (gpio_read_activehigh(SX_BUSY)) ? true : false;
}

void sx_amp_transmit(void)
{
    gpio_low(SX_RX_EN);
    gpio_high(SX_TX_EN);
}

void sx_amp_receive(void)
{
    gpio_low(SX_TX_EN);
    gpio_high(SX_RX_EN);
}

void sx_dio_init_exti_isroff(void)
{
    LL_SYSCFG_SetEXTISource(SX_DIO1_SYSCFG_EXTI_PORTx, SX_DIO1_SYSCFG_EXTI_LINEx);

    // let's not use LL_EXTI_Init(), but let's do it by hand, is easier to allow enabling isr later
    LL_EXTI_DisableEvent_0_31(SX_DIO_EXTI_LINE_x);
    LL_EXTI_DisableIT_0_31(SX_DIO_EXTI_LINE_x);
    LL_EXTI_DisableFallingTrig_0_31(SX_DIO_EXTI_LINE_x);
    LL_EXTI_EnableRisingTrig_0_31(SX_DIO_EXTI_LINE_x);

    NVIC_SetPriority(SX_DIO_EXTI_IRQn, SX_DIO_EXTI_IRQ_PRIORITY);
    NVIC_EnableIRQ(SX_DIO_EXTI_IRQn);
}

void sx_dio_enable_exti_isr(void)
{
    LL_EXTI_ClearFlag_0_31(SX_DIO_EXTI_LINE_x);
    LL_EXTI_EnableIT_0_31(SX_DIO_EXTI_LINE_x);
}

void sx_dio_exti_isr_clearflag(void)
{
    LL_EXTI_ClearFlag_0_31(SX_DIO_EXTI_LINE_x);
}


//-- Out port
#ifdef UART_USE_UART2
  #define OUT_UARTx               USART2
#elif defined UART_USE_LPUART1
  #define OUT_UARTx               LPUART1
#elif defined UART_USE_UART1
  #define OUT_UARTx               USART1
#endif


void out_init_gpio(void)
{
}

void out_set_normal(void)
{
    LL_USART_Disable(OUT_UARTx);
    LL_USART_SetTXPinLevel(OUT_UARTx, LL_USART_TXPIN_LEVEL_STANDARD);
    LL_USART_Enable(OUT_UARTx);
}

void out_set_inverted(void)
{
    LL_USART_Disable(OUT_UARTx);
    LL_USART_SetTXPinLevel(OUT_UARTx, LL_USART_TXPIN_LEVEL_INVERTED);
    LL_USART_Enable(OUT_UARTx);
}


//-- Button

#define BUTTON                    IO_PB7

void button_init(void)
{
    gpio_init(BUTTON, IO_MODE_INPUT_PU, IO_SPEED_DEFAULT);
}

bool button_pressed(void)
{
    return gpio_read_activelow(BUTTON);
}


//-- LEDs

#define LED_GREEN 		            IO_PA1
#define LED_RED		                IO_PA0

void leds_init(void)
{
    gpio_init(LED_GREEN, IO_MODE_OUTPUT_PP_LOW, IO_SPEED_DEFAULT);
    gpio_init(LED_RED, IO_MODE_OUTPUT_PP_LOW, IO_SPEED_DEFAULT);
    gpio_low(LED_GREEN); // LED_GREEN_OFF
    gpio_low(LED_RED); // LED_RED_OFF
}

void led_green_off(void) { gpio_low(LED_GREEN); }
void led_green_on(void) { gpio_high(LED_GREEN); }
void led_green_toggle(void) { gpio_toggle(LED_GREEN); }

void led_red_off(void) { gpio_low(LED_RED); }
void led_red_on(void) { gpio_high(LED_RED); }
void led_red_toggle(void) { gpio_toggle(LED_RED); }


//-- POWER

#define POWER_GAIN_DBM            13 // gain of a PA stage if present
#define POWER_SX126X_MAX_DBM      SX126X_POWER_20_DBM // maximum allowed sx power
#define POWER_USE_DEFAULT_RFPOWER_CALC

#define RFPOWER_DEFAULT           1 // index into rfpower_list array

const rfpower_t rfpower_list[] = {
	{ .dbm = POWER_10_DBM, .mW = 10 },
	{ .dbm = POWER_20_DBM, .mW = 100 },
	{ .dbm = POWER_24_DBM, .mW = 250 },
	{ .dbm = POWER_27_DBM, .mW = 500 },
	{ .dbm = POWER_30_DBM, .mW = 1000 },
};