// Initialize UART for extended-audio
void AUDIO_Init() {
if (Transmitter.audio_player == AUDIO_DISABLED) {
// Reload hardware.ini if audio_player had been temporarily disabled
CONFIG_LoadHardware();
}
printf("Voice: Initializing UART for extended-audio\n");
#if HAS_AUDIO_UART5
if (Transmitter.audio_uart5) {
printf("Voice: UART5 already initialized\n");
return;
}
#endif
#ifndef _DEVO12_TARGET_H_
if ( PPMin_Mode() || Model.protocol == PROTOCOL_PPM ) {
printf("Voice: Cannot initialize UART for extended-audio, PPM in use\n");
UART_SetDataRate(0);
}
else {
#endif // _DEVO12_TARGET_H_
printf("Voice: Setting up UART for extended-audio\n");
UART_SetDataRate(9600);
#ifndef _DEVO12_TARGET_H_
}
#endif // _DEVO12_TARGET_H_
AUDIO_SetVolume();
}
void UART_Initialize()
{
/* Enable clocks for GPIO port containing _USART and USART */
rcc_periph_clock_enable(get_rcc_from_port(UART_CFG.uart));
rcc_periph_clock_enable(get_rcc_from_pin(UART_CFG.rx));
rcc_periph_clock_enable(get_rcc_from_pin(UART_CFG.tx));
/* Enable DMA clock */
rcc_periph_clock_enable(get_rcc_from_port(USART_DMA.dma));
/* Setup GPIO pin GPIO_USARTX_TX on USART GPIO port for transmit.
Set normal function to input as this is mode reverted to in half-duplex receive */
GPIO_setup_input(UART_CFG.rx, ITYPE_FLOAT);
GPIO_setup_output_af(UART_CFG.tx, OTYPE_PUSHPULL, UART_CFG.uart);
/* Setup UART parameters. */
UART_SetDataRate(0);
UART_SetFormat(8, UART_PARITY_NONE, UART_STOPBITS_1);
UART_SetDuplex(UART_DUPLEX_FULL);
usart_set_flow_control(UART_CFG.uart, USART_FLOWCONTROL_NONE);
usart_set_mode(UART_CFG.uart, USART_MODE_TX_RX);
/* Finally enable the USART. */
usart_enable(UART_CFG.uart);
nvic_set_priority(get_nvic_dma_irq(USART_DMA), 3);
nvic_enable_irq(get_nvic_dma_irq(USART_DMA));
#if HAS_AUDIO_UART
/* Enable clocks for GPIO port C (for GPIO_UART5_TX) and UART5. */
rcc_periph_clock_enable(get_rcc_from_port(AUDIO_UART_CFG.uart));
rcc_periph_clock_enable(get_rcc_from_pin(AUDIO_UART_CFG.tx));
/* Setup GPIO pins to use UART5 */
GPIO_setup_output_af(AUDIO_UART_CFG.tx, OTYPE_PUSHPULL, AUDIO_UART_CFG.uart);
/* Setup UART5 parameters. */
usart_set_baudrate(AUDIO_UART_CFG.uart, 9600);
usart_set_databits(AUDIO_UART_CFG.uart, 8);
usart_set_stopbits(AUDIO_UART_CFG.uart, USART_STOPBITS_1);
usart_set_parity(AUDIO_UART_CFG.uart, USART_PARITY_NONE);
usart_set_mode(AUDIO_UART_CFG.uart, USART_MODE_TX);
/* Finally enable the AUDIO_UART_CFG.uart. */
usart_enable(AUDIO_UART_CFG.uart);
#endif
}
