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UART: use pre/post rx in baud rate detection

This commit is contained in:
King Kévin 2018-07-13 18:30:45 +02:00
parent 1cb08356ec
commit ae3621faba
1 changed files with 12 additions and 0 deletions
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12
lib/busvoodoo_uart_generic.c
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@ -738,12 +738,14 @@ static void busvoodoo_uart_generic_command_detect(void* argument)
}
printf("the more traffic is incoming, the better the detection\n");
printf("press any key to exit\n");
// setup USART to receive character
uint8_t uart_databits = 8; // start with 8 bits since this is the most common case (i.e. no additional parity bit is used)
usart_set_baudrate(busvoodoo_uart_generic_specific->usart, 1200); // configure UART to pre-selected baud rate
usart_set_databits(busvoodoo_uart_generic_specific->usart, uart_databits); // configure UART to pre-selected data-bits
usart_set_stopbits(busvoodoo_uart_generic_specific->usart, USART_STOPBITS_1); // 1 stop-bits also complies to 2 stop-bits
usart_set_parity(busvoodoo_uart_generic_specific->usart, USART_PARITY_NONE); // get the raw data since we will do the parity check ourselves
// setup timer to generate/measure signal timing
if ((busvoodoo_uart_generic_specific->timer_port != busvoodoo_uart_generic_specific->rx_port) || (busvoodoo_uart_generic_specific->timer_pin != busvoodoo_uart_generic_specific->rx_pin)) {
rcc_periph_clock_enable(busvoodoo_uart_generic_specific->timer_port_rcc); // enable clock for GPIO peripheral
@ -782,6 +784,11 @@ static void busvoodoo_uart_generic_command_detect(void* argument)
pulse_duration = UINT32_MAX; // reset pulse duration
timer_enable_counter(busvoodoo_uart_generic_specific->timer); // enable timer
// switch on RX
if (busvoodoo_uart_generic_specific->rx_pre) {
(*busvoodoo_uart_generic_specific->rx_pre)();
}
bool reset_state = true; // flag to know if we need to reset the states
uint8_t rx_errors; // number of UART receive errors received
bool wait_for_idle = false; // flag to wait for an IDLE frame
@ -961,6 +968,11 @@ static void busvoodoo_uart_generic_command_detect(void* argument)
user_input_get(); // clear input used to interrupt previous loop
printf("\n");
// switch off RX
if (busvoodoo_uart_generic_specific->rx_post) {
(*busvoodoo_uart_generic_specific->rx_post)();
}
// stop timer
timer_disable_counter(busvoodoo_uart_generic_specific->timer); // disable timer
#if defined(BUSVOODOO_UART_TIMER_USE_INTERRUPT_TABLE) && BUSVOODOO_UART_TIMER_USE_INTERRUPT_TABLE