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HAL_ChibiOS: added UART inversion options

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support GPIO pins or STM32F7
This commit is contained in:
Andrew Tridgell 2018-11-10 20:45:31 +11:00
parent bd117f1548
commit acf03980ca
2 changed files with 60 additions and 0 deletions
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53
libraries/AP_HAL_ChibiOS/UARTDriver.cpp
View File

@ -1081,4 +1081,57 @@ uint64_t UARTDriver::receive_time_constraint_us(uint16_t nbytes)
return last_receive_us;
}
// set optional features, return true on success
bool UARTDriver::set_options(uint8_t options)
{
if (options == 0) {
return true;
}
if (sdef.is_usb) {
return false;
}
#if defined(STM32F7) && HAL_USE_SERIAL == TRUE
// F7 has built-in support for inversion in all uarts
SerialDriver *sd = (SerialDriver*)(sdef.serial);
uint32_t cr2 = sd->usart->CR2;
bool was_enabled = (sd->usart->CR1 & USART_CR1_UE);
if (options & OPTION_RXINV) {
cr2 |= USART_CR2_RXINV;
} else {
cr2 &= ~USART_CR2_RXINV;
}
if (options & OPTION_TXINV) {
cr2 |= USART_CR2_TXINV;
} else {
cr2 &= ~USART_CR2_TXINV;
}
if (was_enabled) {
sd->usart->CR1 &= ~USART_CR1_UE;
}
sd->usart->CR2 = cr2;
if (was_enabled) {
sd->usart->CR1 |= USART_CR1_UE;
}
return true;
#else
// external pin based inversion control, relying on TXINV and RXINV lines in hwdef.dat
bool ret = true;
if (options & OPTION_RXINV) {
if (sdef.rxinv_gpio >= 0) {
hal.gpio->write(sdef.rxinv_gpio, sdef.rxinv_polarity);
} else {
ret = false;
}
}
if (options & OPTION_TXINV) {
if (sdef.txinv_gpio >= 0) {
hal.gpio->write(sdef.txinv_gpio, sdef.txinv_polarity);
} else {
ret = false;
}
}
return ret;
#endif
}
#endif //CONFIG_HAL_BOARD == HAL_BOARD_CHIBIOS

7
libraries/AP_HAL_ChibiOS/UARTDriver.h
View File

@ -52,6 +52,9 @@ public:
// lock a port for exclusive use. Use a key of 0 to unlock
bool lock_port(uint32_t key) override;
// control optional features
bool set_options(uint8_t options) override;
// write to a locked port. If port is locked and key is not correct then 0 is returned
// and write is discarded
size_t write_locked(const uint8_t *buffer, size_t size, uint32_t key) override;
@ -66,6 +69,10 @@ public:
uint8_t dma_tx_stream_id;
uint32_t dma_tx_channel_id;
ioline_t rts_line;
int8_t rxinv_gpio;
uint8_t rxinv_polarity;
int8_t txinv_gpio;
uint8_t txinv_polarity;
uint8_t get_index(void) const {
return uint8_t(this - &_serial_tab[0]);
}