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#include <furi-hal-uart.h>
#include <stdbool.h>
#include <stm32wbxx_ll_lpuart.h>
#include <stm32wbxx_ll_usart.h>
#include <furi-hal-resources.h>
#include <furi.h>
static void (*irq_cb[2])(uint8_t ev, uint8_t data, void* context);
static void* irq_ctx[2];
static void furi_hal_usart_init(uint32_t baud) {
hal_gpio_init_ex(
&gpio_usart_tx,
GpioModeAltFunctionPushPull,
GpioPullUp,
GpioSpeedVeryHigh,
GpioAltFn7USART1);
hal_gpio_init_ex(
&gpio_usart_rx,
GpioModeAltFunctionPushPull,
GpioPullUp,
GpioSpeedVeryHigh,
GpioAltFn7USART1);
LL_USART_InitTypeDef USART_InitStruct = {0};
USART_InitStruct.PrescalerValue = LL_USART_PRESCALER_DIV1;
USART_InitStruct.BaudRate = baud;
USART_InitStruct.DataWidth = LL_USART_DATAWIDTH_8B;
USART_InitStruct.StopBits = LL_USART_STOPBITS_1;
USART_InitStruct.Parity = LL_USART_PARITY_NONE;
USART_InitStruct.TransferDirection = LL_USART_DIRECTION_TX_RX;
USART_InitStruct.HardwareFlowControl = LL_USART_HWCONTROL_NONE;
USART_InitStruct.OverSampling = LL_USART_OVERSAMPLING_16;
LL_USART_Init(USART1, &USART_InitStruct);
LL_USART_SetTXFIFOThreshold(USART1, LL_USART_FIFOTHRESHOLD_1_2);
LL_USART_EnableFIFO(USART1);
LL_USART_ConfigAsyncMode(USART1);
LL_USART_Enable(USART1);
while(!LL_USART_IsActiveFlag_TEACK(USART1))
;
LL_USART_EnableIT_RXNE_RXFNE(USART1);
LL_USART_EnableIT_IDLE(USART1);
HAL_NVIC_SetPriority(USART1_IRQn, 5, 0);
}
static void furi_hal_lpuart_init(uint32_t baud) {
hal_gpio_init_ex(
&gpio_ext_pc0,
GpioModeAltFunctionPushPull,
GpioPullUp,
GpioSpeedVeryHigh,
GpioAltFn8LPUART1);
hal_gpio_init_ex(
&gpio_ext_pc1,
GpioModeAltFunctionPushPull,
GpioPullUp,
GpioSpeedVeryHigh,
GpioAltFn8LPUART1);
LL_LPUART_InitTypeDef LPUART_InitStruct = {0};
LPUART_InitStruct.PrescalerValue = LL_LPUART_PRESCALER_DIV1;
LPUART_InitStruct.BaudRate = 115200;
LPUART_InitStruct.DataWidth = LL_LPUART_DATAWIDTH_8B;
LPUART_InitStruct.StopBits = LL_LPUART_STOPBITS_1;
LPUART_InitStruct.Parity = LL_LPUART_PARITY_NONE;
LPUART_InitStruct.TransferDirection = LL_LPUART_DIRECTION_TX_RX;
LPUART_InitStruct.HardwareFlowControl = LL_LPUART_HWCONTROL_NONE;
LL_LPUART_Init(LPUART1, &LPUART_InitStruct);
LL_LPUART_SetTXFIFOThreshold(LPUART1, LL_LPUART_FIFOTHRESHOLD_1_8);
LL_LPUART_SetRXFIFOThreshold(LPUART1, LL_LPUART_FIFOTHRESHOLD_1_8);
LL_LPUART_EnableFIFO(LPUART1);
LL_LPUART_Enable(LPUART1);
while((!(LL_LPUART_IsActiveFlag_TEACK(LPUART1))) || (!(LL_LPUART_IsActiveFlag_REACK(LPUART1))))
;
furi_hal_uart_set_br(FuriHalUartIdLPUART1, baud);
LL_LPUART_EnableIT_RXNE_RXFNE(LPUART1);
LL_LPUART_EnableIT_IDLE(LPUART1);
HAL_NVIC_SetPriority(LPUART1_IRQn, 5, 0);
}
void furi_hal_uart_init(FuriHalUartId ch, uint32_t baud) {
if(ch == FuriHalUartIdLPUART1)
furi_hal_lpuart_init(baud);
else if(ch == FuriHalUartIdUSART1)
furi_hal_usart_init(baud);
}
void furi_hal_uart_set_br(FuriHalUartId ch, uint32_t baud) {
if(ch == FuriHalUartIdUSART1) {
if(LL_USART_IsEnabled(USART1)) {
// Wait for transfer complete flag
while(!LL_USART_IsActiveFlag_TC(USART1))
;
LL_USART_Disable(USART1);
uint32_t uartclk = LL_RCC_GetUSARTClockFreq(LL_RCC_USART1_CLKSOURCE);
LL_USART_SetBaudRate(
USART1, uartclk, LL_USART_PRESCALER_DIV1, LL_USART_OVERSAMPLING_16, baud);
LL_USART_Enable(USART1);
}
} else if(ch == FuriHalUartIdLPUART1) {
if(LL_LPUART_IsEnabled(LPUART1)) {
// Wait for transfer complete flag
while(!LL_LPUART_IsActiveFlag_TC(LPUART1))
;
LL_LPUART_Disable(LPUART1);
uint32_t uartclk = LL_RCC_GetLPUARTClockFreq(LL_RCC_LPUART1_CLKSOURCE);
if(uartclk / baud > 4095) {
LL_LPUART_SetPrescaler(LPUART1, LL_LPUART_PRESCALER_DIV32);
LL_LPUART_SetBaudRate(LPUART1, uartclk, LL_LPUART_PRESCALER_DIV32, baud);
} else {
LL_LPUART_SetPrescaler(LPUART1, LL_LPUART_PRESCALER_DIV1);
LL_LPUART_SetBaudRate(LPUART1, uartclk, LL_LPUART_PRESCALER_DIV1, baud);
}
LL_LPUART_Enable(LPUART1);
}
}
}
void furi_hal_uart_deinit(FuriHalUartId ch) {
furi_hal_uart_set_irq_cb(ch, NULL, NULL);
if(ch == FuriHalUartIdUSART1) {
LL_USART_Disable(USART1);
hal_gpio_init(&gpio_usart_tx, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
hal_gpio_init(&gpio_usart_rx, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
} else if(ch == FuriHalUartIdLPUART1) {
LL_LPUART_Disable(LPUART1);
hal_gpio_init(&gpio_ext_pc0, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
hal_gpio_init(&gpio_ext_pc1, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
}
}
void furi_hal_uart_tx(FuriHalUartId ch, uint8_t* buffer, size_t buffer_size) {
if(ch == FuriHalUartIdUSART1) {
if(LL_USART_IsEnabled(USART1) == 0) return;
while(buffer_size > 0) {
while(!LL_USART_IsActiveFlag_TXE(USART1))
;
LL_USART_TransmitData8(USART1, *buffer);
buffer++;
buffer_size--;
}
} else if(ch == FuriHalUartIdLPUART1) {
if(LL_LPUART_IsEnabled(LPUART1) == 0) return;
while(buffer_size > 0) {
while(!LL_LPUART_IsActiveFlag_TXE(LPUART1))
;
LL_LPUART_TransmitData8(LPUART1, *buffer);
buffer++;
buffer_size--;
}
}
}
void furi_hal_uart_set_irq_cb(
FuriHalUartId ch,
void (*cb)(UartIrqEvent ev, uint8_t data, void* ctx),
void* ctx) {
if(cb == NULL) {
if(ch == FuriHalUartIdUSART1)
NVIC_DisableIRQ(USART1_IRQn);
else if(ch == FuriHalUartIdLPUART1)
NVIC_DisableIRQ(LPUART1_IRQn);
irq_cb[ch] = cb;
irq_ctx[ch] = ctx;
} else {
irq_ctx[ch] = ctx;
irq_cb[ch] = cb;
if(ch == FuriHalUartIdUSART1)
NVIC_EnableIRQ(USART1_IRQn);
else if(ch == FuriHalUartIdLPUART1)
NVIC_EnableIRQ(LPUART1_IRQn);
}
}
void LPUART1_IRQHandler(void) {
if(LL_LPUART_IsActiveFlag_RXNE_RXFNE(LPUART1)) {
uint8_t data = LL_LPUART_ReceiveData8(LPUART1);
irq_cb[FuriHalUartIdLPUART1](UartIrqEventRXNE, data, irq_ctx[FuriHalUartIdLPUART1]);
} else if(LL_LPUART_IsActiveFlag_IDLE(LPUART1)) {
irq_cb[FuriHalUartIdLPUART1](UartIrqEventIDLE, 0, irq_ctx[FuriHalUartIdLPUART1]);
LL_LPUART_ClearFlag_IDLE(LPUART1);
} else if(LL_LPUART_IsActiveFlag_ORE(LPUART1)) {
LL_LPUART_ClearFlag_ORE(LPUART1);
}
//TODO: more events
}
void USART1_IRQHandler(void) {
if(LL_USART_IsActiveFlag_RXNE_RXFNE(USART1)) {
uint8_t data = LL_USART_ReceiveData8(USART1);
irq_cb[FuriHalUartIdUSART1](UartIrqEventRXNE, data, irq_ctx[FuriHalUartIdUSART1]);
} else if(LL_USART_IsActiveFlag_IDLE(USART1)) {
irq_cb[FuriHalUartIdUSART1](UartIrqEventIDLE, 0, irq_ctx[FuriHalUartIdUSART1]);
LL_USART_ClearFlag_IDLE(USART1);
} else if(LL_USART_IsActiveFlag_ORE(USART1)) {
LL_USART_ClearFlag_ORE(USART1);
}
}
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